Updated on 2022/10/30

写真a

 
YAMAGUCHI, Tsuyoshi
 
Organization
Graduate School of Engineering Materials Process Engineering 1 Assistant Professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Materials Science and Engineering
Title
Assistant Professor
Contact information
メールアドレス

Degree 1

  1. Ph.D of Science ( Kyoto University ) 

Research Interests 1

  1. Solution Chemistry

Research Areas 2

  1. Others / Others  / Science@Chemistry@Physical Chemistry

  2. Natural Science / Biophysics, chemical physics and soft matter physics

Current Research Project and SDGs 3

  1. Microscopic study on the transport properties of liquids and solutions

  2. 二酸化炭素吸収液の構造と物性

  3. イオン液体と濃厚電解質溶液の構造とダイナミクス

Research History 3

  1. Nagoya University   Graduate School of Engineering Materials Process Engineering 1   Assistant Professor

    2017.4

  2. Nagoya University   Graduate School of Engineering Department of Molecular Design and Engineering   Assistant Professor

    2007.4 - 2017.3

  3. Nagoya University   Graduate School of Engineering Department of Molecular Design and Engineering   Assistant

    2007.3

Professional Memberships 7

  1. THE ELECTROCHEMICAL SOCIETY OF JAPAN

  2. 溶液化学研究会

  3. THE PHYSICAL SOCIETY OF JAPAN

  4. THE CHEMICAL SOCIETY OF JAPAN

  5. THE SOCIETY OF CHEMICAL ENGINEERS, JAPAN

  6. THE MOLECULAR SIMULATION SOCIETY OF JAPAN

  7. American Chemical Society

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Awards 3

  1. 溶液化学研究会学術賞

    2014.11   溶液化学研究会  

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    Country:Japan

  2. 溶液化学研究会奨励賞

    2007   溶液化学研究会  

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    Country:Japan

  3. BCSJ賞

    2005.12  

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    Country:Japan

 

Papers 124

  1. Measurement of complex shear viscosity up to 3 GHz using an electrodeless AT-cut quartz transducer

    Yamaguchi Tsuyoshi, Matsuoka Tatsuro

    JAPANESE JOURNAL OF APPLIED PHYSICS   Vol. 61 ( SG )   2022.7

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    Language:Japanese   Publisher:Japanese Journal of Applied Physics  

    An experimental method is proposed to determine the frequency-dependent complex shear viscosity of liquids based on the quartz crystal microbalance with dissipation method. An AT-cut quartz transducer without metal electrodes is immersed in a sample liquid and the transducer is electrically coupled to the circuit through the dielectric response of the sample itself. After correcting for the apparent change in the resonance properties due to the dielectric coupling of the sample, our method is able to determine the viscosity of liquids of high polarity and low viscosity at frequencies as high as 3 GHz. The method was then applied to ethylene glycol and the viscoelastic relaxation in the GHz regime was observed. Furthermore, it was also applied to room-temperature ionic liquids to show that the dielectric correction of the resonance properties is valid for conductive liquids.

    DOI: 10.35848/1347-4065/ac4141

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  2. Comparison between longitudinal viscoelastic relaxation and sound dispersion of molecular liquids on the molecular scale

    Yamaguchi T.

    Journal of Chemical Physics   Vol. 156 ( 24 ) page: 244505   2022.6

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    Language:Japanese   Publisher:Journal of Chemical Physics  

    Molecular dynamics simulation on some molecular liquids was performed to study sound dispersion on the molecular scale. The sound velocity was determined from the intermediate scattering function, and the relation between the longitudinal modulus and frequency was compared with the frequency-dependent longitudinal modulus in the q = 0 limit evaluated by the Kubo-Green theory. The sound dispersion of a monoatomic liquid up to qσ ≅ 2 was almost quantitatively explained by the viscoelasticity in the q = 0 limit when the wavenumber dependence of the heat capacity ratio was taken into account. The situation was similar for a polyatomic molecular liquid for which the intramolecular degrees of freedom were fixed. For a polyatomic liquid with intramolecular degrees of freedom, the sound dispersion on the molecular scale was connected to the high-frequency limit of the ultrasonic relaxation mode assigned to the vibrational energy relaxation. After subtracting the contribution of the vibrational energy relaxation, both the longitudinal viscoelasticity and the sound dispersion depended little on the presence of intramolecular degrees of freedom.

    DOI: 10.1063/5.0098098

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  3. Implementation of solvent polarization in three-dimensional reference interaction-site model self-consistent field theory

    Yoshida N., Yamaguchi T., Nakano H.

    Chemical Physics Letters   Vol. 797   2022.6

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    Language:Japanese   Publisher:Chemical Physics Letters  

    The three-dimensional reference interaction-site model self-consistent field (3D-RISM-SCF) theory is an electronic structure theory of solvated molecules, which can handle the electronic polarization of the solute molecule induced by the interaction with the solvent, whereas the electronic polarization of solvent molecules is ignored. Here, the solvent-polarizable model is implemented to take into account the electronic polarization of solvent molecules. It is applied to the water molecule in an aqueous solution and the p-nitroaniline molecule in an aqueous solution, and the effects of the solvent polarization on the properties of these solutes are demonstrated.

    DOI: 10.1016/j.cplett.2022.139579

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  4. Volume viscosity and ultrasonic relaxation of ethanol-water mixtures studied by molecular dynamics simulations

    Yamaguchi Tsuyoshi

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Vol. 24 ( 20 ) page: 12311 - 12318   2022.5

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    Language:Japanese   Publisher:Physical Chemistry Chemical Physics  

    The volume viscosity of ethanol-water mixtures at various compositions was calculated by means of equilibrium molecular dynamics simulations, and the results were compared with acoustic experiments. The volume viscosity exhibited a strong maximum around the ethanol mole fraction of 0.27, which is in agreement with experiments. The relaxation in the 100 ps regime, which had been revealed by ultrasonic spectroscopy, was also reproduced. Analysis of the two-body density and the adiabatic pressure fluctuation demonstrated that the large volume viscosity of the mixture originates from the long-range concentration fluctuation.

    DOI: 10.1039/d2cp00856d

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  5. Coupling between Translational Diffusion of a Solute and Dynamicsof the Heterogeneous Structure: Higher Alcohols and Ionic Liquids

    Yamaguchi Tsuyoshi

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 126 ( 16 ) page: 3125 - 3134   2022.4

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    Language:Japanese   Publisher:Journal of Physical Chemistry B  

    Translational diffusion of nonpolar monoatomic solutes in a room-temperature ionic liquid and 1-octanol was studied by molecular dynamics simulation. The diffusion coefficient was evaluated in two different ways: (1) from the mean-square displacement of a freely diffusing solute and (2) from the time correlation function of force acting on a fixed solute. The diffusion of the free solute is much greater than the prediction of the Stokes-Einstein (SE) relation when the size of the solute is small, as has been reported by many experimental works. In contrast, the friction on fixed small solutes follows the SE relation. The mechanism of the solute diffusion in both solvents was then analyzed based on the coupling between the translational motion of the solute and the collective dynamics of the heterogeneous intermediate-range structure characteristic to these solvents. Analysis revealed that the coupling is present in all systems, but the relaxation is fast in the cases of free and small solutes. This suggests that the coupling can relax through the motion of the solute when the solute is free and small, while the relaxation of the heterogeneous structure itself is required for large or fixed solutes. The difference in the relaxation dynamics of the friction on the solute and the shear viscosity is explained as the coupling with different dynamic modes of the solvent. Therefore, the validity of the SE relation may not be a good criterion to judge whether the mechanisms of the diffusion and the viscosity are the same or not.

    DOI: 10.1021/acs.jpcb.2c01053

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  6. Decoupling between Solvent Viscosity and Diffusion of a Small Solute Induced by Self-Motion Reviewed

    Yamaguchi Tsuyoshi

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   Vol. 12 ( 32 ) page: 7696 - 7700   2021.8

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Physical Chemistry Letters  

    The self-diffusion of a monatomic solute in liquid 1-octanol and n-tetradecane was investigated by means of a molecular dynamics simulation. The diffusion coefficient of a solute as small as argon is much greater than that obtained from the hydrodynamic-based Stokes-Einstein (SE) relation, as was reported experimentally. A relaxation of the memory function of a freely diffusing solute is much faster than that of the autocorrelation function of a shear stress. However, the SE behavior is recovered when the solute is spatially fixed, and the diffusion coefficient is calculated from the force-force autocorrelation function. A relaxation of the autocorrelation function of the force also follows that of shear stress. The fast diffusion of a small solute is thus ascribed to the decoupling between the structural relaxation of solvent and the solute diffusion induced by the self-motion of the solute.

    DOI: 10.1021/acs.jpclett.1c02219

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  7. Molecular dynamics simulation study on the isomerization reaction in a solvent with slow structural relaxation Reviewed

    CHEMICAL PHYSICS   Vol. 542   page: 111056   2021.2

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.chemphys.2020.111056

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  8. Solvation dynamics in electronically polarizable solvents: Theoretical treatment using solvent-polarizable three-dimensional reference interaction-site model theory combined with time-dependent density functional theory Reviewed

    Yamaguchi Tsuyoshi, Yoshida Norio

    JOURNAL OF CHEMICAL PHYSICS   Vol. 154 ( 4 ) page: 044504   2021.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Chemical Physics  

    DOI: 10.1063/5.0036289

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  9. Coupling between Structural and Dielectric Relaxations of Methanol and Ethanol Studied by Molecular Dynamics Simulation Reviewed

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 124 ( 32 ) page: 7027 - 7036   2020.8

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcb.0c05685

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  10. Nonequilibrium free-energy profile of charge-transfer reaction in polarizable solvent studied using solvent-polarizable three-dimensional reference interaction-site model theory Reviewed

    JOURNAL OF CHEMICAL PHYSICS   Vol. 153 ( 3 ) page: 034502   2020.7

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0013083

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  11. Energy-Saving CO2 Capture by H-2 Gas Stripping for Integrating CO2 Separation and Conversion Processes Reviewed

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   Vol. 8 ( 23 ) page: 8732 - 8740   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acssuschemeng.0c02459

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  12. Development of a solvent-polarizable three-dimensional reference interaction-site model theory (vol 152, 114108, 2020) Reviewed

    Yoshida Norio, Yamaguchi Tsuyoshi

    JOURNAL OF CHEMICAL PHYSICS   Vol. 152 ( 18 ) page: 189904   2020.5

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0010622

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  13. Development of a solvent-polarizable three-dimensional reference interaction-site model theory Reviewed

    Norio Yoshida, Tsuyoshi Yamaguchi

    Journal of Chemical Physics   Vol. 152 ( 11 ) page: 114108   2020.3

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0004173

  14. Carbon Dioxide Absorption Heat in Liquid-Liquid and Solid-Liquid Phase-Change Solvents Using Continuous Calorimetry Reviewed

    Tran Khuyen V. B., Ando Ryuya, Yamaguchi Tsuyoshi, Machida Hiroshi, Norinaga Koyo

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   Vol. 59 ( 8 ) page: 3475 - 3484   2020.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.iecr.9b04672

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  15. Dynamic Chelate Effect on the Li+-Ion Conduction in Solvate Ionic Liquids Reviewed

    Arai Nana, Watanabe Hikari, Yamaguchi Tsuyoshi, Seki Shiro, Ueno Kazuhide, Dokko Kaoru, Watanabe Masayoshi, Kameda Yasuo, Buchner Richard, Umebayashi Yasuhiro

    JOURNAL OF PHYSICAL CHEMISTRY C   Vol. 123 ( 50 ) page: 30228 - 30233   2019.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.9b10770

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  16. Modelling of CO2 solubility in phase separation solvent composed of amine/ether/water system for CO2 capture Reviewed

    Machida Hiroshi, Ando Ryuya, Esaki Takehiro, Yamaguchi Tsuyoshi, Norinaga Koyo

    JOURNAL OF MOLECULAR LIQUIDS   Vol. 292   2019.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.molliq.2019.111411

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  17. Composition Dependence of Translation-Orientation Coupling Constant in the Mixture of n-pentane and 2,2-dimethylpropane Studied by Molecular Dynamics Simulation Reviewed

    Matsuoka Tatsuro, Yatsuya Masaki, Yamaguchi Tsuyoshi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 88 ( 9 )   2019.9

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/JPSJ.88.093601

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  18. Effect of Molecular Orientational Correlations on Solvation Free Energy Computed by Reference Interaction Site Model Theory Reviewed

    Tanimoto Shoichi, Yoshida Norio, Yamaguchi Tsuyoshi, Ten-no Seiichiro L., Nakano Haruyuki

    JOURNAL OF CHEMICAL INFORMATION AND MODELING   Vol. 59 ( 9 ) page: 3770 - 3781   2019.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jcim.9b00330

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  19. Relation between Anharmonicity of Free-Energy Profile and Spectroscopy in Solvation Dynamics: Differences in Spectral Broadening and Peak Shift in Transient Hole-Burning Spectroscopy Studied by Equilibrium Molecular Dynamics Simulation Reviewed

    Yamaguchi Tsuyoshi, Yoshida Norio, Nishiyama Katsura

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 123 ( 32 ) page: 7036 - 7042   2019.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcb.9b04711

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  20. Shear Thinning and Nonlinear Structural Deformation of Ionic Liquids with Long Alkyl Chains Studied by Molecular Dynamics Simulation Reviewed

    Yamaguchi Tsuyoshi

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 123 ( 29 ) page: 6260 - 6265   2019.7

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcb.9b03557

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  21. High-frequency shear viscosity and ionic mobility of solutions of polyethylene glycol in ionic liquids

    Yamaguchi Tsuyoshi, Kikuzawa Takujiro

    JOURNAL OF MOLECULAR LIQUIDS   Vol. 284   page: 252 - 257   2019.6

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    DOI: 10.1016/j.molliq.2019.04.015

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  22. Collective Mesoscale Dynamics of Liquid 1-Dodecanol Studied by Neutron Spin-Echo Spectroscopy with Isotopic Substitution and Molecular Dynamics Simulation Reviewed International coauthorship

    Yamaguchi Tsuyoshi, Faraone Antonio, Nagao Michihiro

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 123 ( 1 ) page: 239 - 246   2019.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcb.8b10299

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  23. Development of phase separation solvent for CO2 capture by aqueous (amine plus ether) solution

    Machida Hiroshi, Oba Kazuki, Tomikawa Takashi, Esaki Takehiro, Yamaguchi Tsuyoshi, Horizoe Hirotoshi

    JOURNAL OF CHEMICAL THERMODYNAMICS   Vol. 113   page: 64 - 70   2017.10

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    Publisher:Journal of Chemical Thermodynamics  

    DOI: 10.1016/j.jct.2017.05.043

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  24. Effects of molecular shape and flexibility on fast sound of organic liquids

    Tsuyoshi Yamaguchi, Koji Yoshida, Shinya Hosokawa, Daisuke Ishikawa, Alfred Q. R. Baron

    The Journal of Chemical Physics   Vol. 157 ( 15 ) page: 154504   2022.9

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    DOI: 10.1063/5.0107387

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  25. Durability and fire-hazardous-risk evaluation of unique phase separation solvent using high-boiling-point amine and ether Reviewed

    Maeda N., Kishimoto A., Machida H., Yamaguchi T., Yanase K., Norinaga K.

    International Journal of Greenhouse Gas Control   Vol. 114   2022.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:International Journal of Greenhouse Gas Control  

    Durability and fire hazard risk evaluations were conducted to determine the process feasibility of a unique phase separation solvent with a low regeneration temperature (90 °C) consisting of an amine, ether, and a small amount of water. The results are as follows. I) The amine degradation rate of the phase separation solvent was determined to be less than 1/10 of that of monoethanolamine, which was attributed to the high oxidative resistance and low regeneration temperature of the former. II) The composition of the gas that formed in the absorber was completely out of the combustible range during the treatment of 6% oxygen-containing gas on a dry basis. Therefore, we believe that this phase separation solvent is applicable to the treatment of exhaust gas from coal-fired thermal power plants and can realize stable operation with a small amount of amine required for replenishment.

    DOI: 10.1016/j.ijggc.2021.103532

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  26. Fluctuation in diethylene glycol diethyl ether/water mixtures near the lower critical solution temperature studied by small- and wide-angle x-ray scattering and thermodynamic calculation Reviewed

    Yanase K., Tran K.V.B., Yamaguchi T., Machida H., Norinaga K.

    Journal of Molecular Liquids   Vol. 346   2022.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Molecular Liquids  

    We studied local structure of diethylene glycol diethyl ether (DEGDEE)-water mixtures near the lower critical solution temperature (LCST) by means of simultaneous small- and wide-angle x-ray scattering measurement and thermodynamic calculation based on the activity coefficient model. Long-wavelength limits of structure factors SNN(0), SCC(0), and SNC(0), which respectively represent mean square fluctuations in the particle number, the concentration, and their cross correlation, are determined from scattering intensity extrapolated to the zero scattering vector and thermodynamic quantities according to the Bhatia and Thornton formula. SNN(0) and SCC(0) exhibit maxima near critical concentration. We found that difference between partial molar volumes of water and DEGDEE essentially results in SNN(0) values being one order of magnitude larger than SCC(0) values. Further, we determined Kirkwood-Buff (KB) integrals to clarify a mixing state of the solution from a mesoscopic point of view. The KB integrals also exhibit extrema near critical concentration. These results demonstrate self-segregations of both DEGDEE and water in a nanometer length scale even at homogeneous solution states, which can be regarded as a precursor of the macroscopic phase separation. Concentration dependence of the wide-angle scattering curve suggests that the short-range structure, whose length scale is sub-nanometer, moderately changes between the intrinsic bulk structures of DEGDEE and water. Comparison of the KB integrals with those determined by the activity coefficient model using non-random two-liquid equation is presented and effects of the fluctuation on the phase behavior are discussed.

    DOI: 10.1016/j.molliq.2021.117830

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  27. Momentum removal to obtain the position-dependent diffusion constant in constrained molecular dynamics simulation Reviewed

    Fujimoto Kazushi, Nagai Tetsuro, Yamaguchi Tsuyoshi

    JOURNAL OF COMPUTATIONAL CHEMISTRY   Vol. 42 ( 30 ) page: 2136 - 2144   2021.8

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Computational Chemistry  

    The position-dependent diffusion coefficient along with free energy profile are important parameters needed to study mass transport in heterogeneous systems such as biological and polymer membranes, and molecular dynamics (MD) calculation is a popular tool to obtain them. Among many methodologies, the Marrink–Berendsen (MB) method is often employed to calculate the position-dependent diffusion coefficient, in which the autocorrelation function of the force on a fixed molecule is related to the friction on the molecule. However, the diffusion coefficient is shown to be affected by the period of the removal of the center-of-mass velocity, (Formula presented.), which is necessary when performing MD calculations using the Ewald method for Coulombic interaction. We have clarified theoretically in this study how this operation affects the diffusion coefficient calculated by the MB method, and the theoretical predictions are proven by MD calculations. Therefore, we succeeded in providing guidance on how to select an appropriate (Formula presented.) value in estimating the position-dependent diffusion coefficient by the MB method. This guideline is applicable also to the Woolf–Roux method.

    DOI: 10.1002/jcc.26742

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  28. Density and Viscosity Calculation of a Quaternary System of Amine Absorbents before and after Carbon Dioxide Absorption Reviewed

    Khuyen Viet Bao Tran, Sato Miho, Yanase Keiichi, Yamaguchi Tsuyoshi, Machida Hiroshi, Norinaga Koyo

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   Vol. 66 ( 8 ) page: 3057 - 3071   2021.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Chemical and Engineering Data  

    Viscosity and density of amine absorbents affect directly their flow, which is involved in the process design and simulation of carbon dioxide capture. A mixture of 2-(ethyl amino) ethanol (EAE), diethylene glycol diethyl ether (DEGDEE), and water changes its phase from homogeneous to two-liquid ones on CO2 absorption. It is difficult to calculate the viscosity and density of this phase separation solution, especially those of quaternary-component phases. In this research, models to calculate the density and viscosity of the quaternary-component system of EAE/DEGDEE/water/carbamate were suggested based on nonrandom two-liquid (NRTL)-DVOL and NRTL-DVIS models. Given the component concentrations, these models can replicate well the viscosity and density of the solutions. A good calculation result with a few numbers of parameters makes the models simple and easy to use.

    DOI: 10.1021/acs.jced.1c00195

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  29. Online composition analysis of phase separation solvent for carbon dioxide capture using ATR‐FT‐IR Reviewed

    Miho Sato, Khuyen Viet Bao Tran, Tsuyoshi Yamaguchi, Hiroshi Machida, Koyo Norinaga

    Journal of Advanced Manufacturing and Processing     2020.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/amp2.10067

  30. Online composition analysis of phase separation solvent for carbon dioxide capture using ATR‐FT‐IR Reviewed

    Miho Sato, Khuyen Viet Bao Tran, Tsuyoshi Yamaguchi, Hiroshi Machida, Koyo Norinaga

    Journal of Advanced Manufacturing and Processing   Vol. 2 ( 4 ) page: e10067   2020.7

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    DOI: https://doi.org/10.1002/amp2.10067

  31. Translation-orientation coupling and Cox-Merz rule of liquid hexane Reviewed

    Yamaguchi Tsuyoshi, Matsuoka Tatsuro

    The Journal of Chemical Physics   Vol. 149 ( 20 ) page: 204502   2018.11

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    DOI: 10.1063/1.5051680

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  32. Low temperature swing process for CO2 absorption-desorption using phase separation CO2 capture solvent Reviewed

    Hiroshi Machida, Ryuya Ando, Takehiro Esaki, Tsuyoshi Yamaguchi, Hirotoshi Horizoe, Akira Kishimoto, Katsuya Akiyama, Makoto Nishimura

    International Journal of Greenhouse Gas Control   Vol. 75   page: 1 - 7   2018.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier Ltd  

    We have developed a phase separation solvent which transforms into two liquid phases after CO2 absorption, in order to establish an energy-saving CO2 capture process. The CO2 loading changes strongly with temperature increase during the phase separation, which enables us to reduce the temperature difference between absorber and desorber. The low temperature swing process economizes the energy requirement for the CO2 capture process with highly-effective reaction-heat recovery. We evaluated the energy consumption of the CO2 capture process with our novel phase separation solvent based on the CO2 solubility. The energy requirement was estimated to be as low as 1.6 GJ/ton-CO2.

    DOI: 10.1016/j.ijggc.2018.05.010

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  33. Re-investigation of translational–orientational coupling behavior of nematogen in isotropic phase with non-nematogenic additives Reviewed

    Wataru Hanai, Tsuyoshi Yamaguchi, Tatsuro Matsuoka

    Japanese Journal of Applied Physics   Vol. 57 ( 7 ) page: 07LB05   2018.7

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    DOI: 10.7567/JJAP.57.07LB05

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  34. Stress-structure coupling and nonlinear rheology of Lennard-Jones liquid Reviewed

    Tsuyoshi Yamaguchi

    The Journal of Chemical Physics   Vol. 148 ( 23 ) page: 234507   2018.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.5026536

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  35. Coupling between mesoscopic dynamics and shear stress of room-temperature ionic liquid Reviewed

    Tsuyoshi Yamaguchi

    Physical Chemistry Chemical Physics     2018.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c8cp02814a

  36. Shear Viscosity and Heterogeneous Structure of Alkylaminoethanol-Based CO2 Absorbents Reviewed

    Tsuyoshi Yamaguchi, Ryuya Ando, Koji Yoshida, Toshio Yamaguchi, Hiroshi Machida

    Journal of Physical Chemistry B   Vol. 122 ( 14 ) page: 4045 - 4050   2018.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society  

    Shear viscosity of concentrated aqueous solutions of alkylaminoethanols was determined with changing the length of the alkyl chain and the concentration of dissolved CO2. The viscosity increased with increasing the CO2 loading, reflecting the strengthening of the intermolecular electrostatic interaction. The dependence of the viscosity on both temperature and CO2 loading was described by a modified version of Vogel-Fulchar-Tammann equation. Compared at the same volume concentration of CO2, the viscosity increased with increasing the alkyl chain lengths, and the dependence on the alkyl chain length increased with the CO2 loading. At the same time, small-angle X-ray scattering profiles exhibited the presence of a prepeak when the alkyl chain was long, and the prepeak grew with the CO2 loading. It suggests that the presence of the heterogeneous structure increases the shear viscosity of the CO2 absorbents when the alkyl chain is long.

    DOI: 10.1021/acs.jpcb.8b00946

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  37. Stick boundary condition at large hard sphere arising from effective attraction in binary hard-sphere mixtures Reviewed

    Yuka Nakamura, Akira Yoshimori, Ryo Akiyama, Tsuyoshi Yamaguchi

    JOURNAL OF CHEMICAL PHYSICS   Vol. 148 ( 12 ) page: 124502   2018.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER INST PHYSICS  

    We have studied the diffusion of a large hard-sphere solute immersed in binary hard-sphere mixtures. We reveal how the boundary condition at the solute surface is affected by the solvent density around the solute. Solving equations for a binary compressible mixture by perturbation expansions, we obtain the boundary condition depending on the size ratio of binary solvent spheres. When the size ratio is 1: 2, the boundary condition lies close to the slip boundary condition. By contrast, when the size ratio becomes large, the boundary condition approaches the stick boundary condition with the addition of larger solvent spheres. We find that the transition to the stick boundary condition is caused by the increase in the solvent density around the solute due to an entropic effect. Published by AIP Publishing.

    DOI: 10.1063/1.5025202

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  38. Effects of mesoscopic domain structure on shear viscosity of ionic liquids

    Yamaguchi Tsuyoshi

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   Vol. 255   page: .   2018.3

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  39. Structural Origin of Shear Viscosity of Liquid Water Reviewed

    Tsuyoshi Yamaguchi

    Journal of Physical Chemistry B   Vol. 122 ( 3 ) page: 1255 - 1260   2018.1

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    The relation between the microscopic structure and shear viscosity of liquid water was analyzed by calculating the cross-correlation between the shear stress and the two-body density using the molecular dynamics simulation. The slow viscoelastic relaxation that dominates the steady-state shear viscosity was ascribed to the destruction of the hydrogen-bonding network structure along the compression axis of the shear distortion, which resembles the structural change under isotropic hydrostatic compression. It means that the shear viscosity of liquid water reflects the anisotropic destruction-formation dynamics of the hydrogen-bonding network.

    DOI: 10.1021/acs.jpcb.7b10893

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  40. Structural Relaxation and Viscoelasticity of a Higher Alcohol with Mesoscopic Structure Reviewed

    Tsuyoshi Yamaguchi, Makina Saito, Koji Yoshida, Toshio Yamaguchi, Yoshitaka Yoda, Makoto Seto

    Journal of Physical Chemistry Letters   Vol. 9 ( 2 ) page: 298 - 301   2018.1

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    This work studied the slow dynamics of liquids with mesoscopic structure and its relation to shear viscosity. Quasielastic scattering measurements were made on a liquid higher alcohol, 3,7-dimethyl-1-octanol, using γ-ray time-domain interferometry at a synchrotron radiation facility, SPring-8. The quasielastic scattering spectra were measured to determine the structural relaxation at two wavenumbers of the prepeak and the main peak of the static structure factor. It was found that relaxation at the prepeak is more than 10 times slower than that at the main peak. Compared with the viscoelastic spectrum, which exhibits bimodal relaxation, the relaxations at the prepeak and the main peak were shown to correspond to the slower and faster modes of the viscoelastic relaxation, respectively. This indicates that the dynamics of the mesoscopic structure represented as the prepeak contributes to the shear viscosity through the slowest mode of the viscoelastic relaxation.

    DOI: 10.1021/acs.jpclett.7b02907

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  41. Development of phase separation solvent for CO2 capture by aqueous (amine plus ether) solution Reviewed

    Hiroshi Machida, Kazuki Oba, Takashi Tomikawa, Takehiro Esaki, Tsuyoshi Yamaguchi, Hirotoshi Horizoe

    JOURNAL OF CHEMICAL THERMODYNAMICS   Vol. 113   page: 64 - 70   2017.10

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    Phase separation solvents for CO2 absorption have been designed which transform into two liquid phases after CO2 absorption. We studied seven types of amines and one type of ether-mixed solvents and observed that there are three types of phase phenomena, namely, no phase separation, phase separation with CO2 scrubbing, and initially immiscible. We also observed that these types can be classified using the hydrophobicity of the amine. The solubility of CO2 was measured in the phase separation solvent. In the lower-pressure region, the solvent formed a single liquid phase. When the amount of CO2 in solution reached a separation point, the solvent separated into two liquid phases. (C) 2017 Elsevier Ltd.

    DOI: 10.1016/j.jct2017.05.043

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  42. Decoupling between the Temperature-Dependent Structural Relaxation and Shear Viscosity of Concentrated Lithium Electrolyte Reviewed

    Tsuyoshi Yamaguchi, Koji Yoshida, Toshio Yamaguchi, Michihiro Nagao, Antonio Faraone, Shiro Seki

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 121 ( 37 ) page: 8767 - 8773   2017.9

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    The intermediate scattering functions of concentrated solutions of LiPF6 in propylene carbonate (PC) were measured at various temperatures, two different wavenumbers, and three different concentrations using neutron spin echo (NSE) spectroscopy. The temperature dependence of the relaxation time was larger than that of the steady-state shear viscosity in all cases. The shear relaxation spectra were also determined at different temperatures. The normalized spectra reduced to a master curve when the frequency was multiplied by the steady-state shear-viscosity, indicating that the temperature dependence of the steady-state shear viscosity can be explained by that of the relaxation time of the shear stress. It is thus suggested that the dynamics of the shear stress is decoupled from the structural dynamics on the molecular scale.

    DOI: 10.1021/acs.jpcb.7b04633

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  43. Analysis of shear viscosity and viscoelastic relaxation of liquid methanol based on molecular dynamics simulation and mode-coupling theory International coauthorship

    Tsuyoshi Yamaguchi, Antonio Faraone

    JOURNAL OF CHEMICAL PHYSICS   Vol. 146 ( 24 ) page: 244506   2017.6

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    The role of the prepeak structure of liquid methanol in determining its shear viscosity was studied by means of molecular dynamics (MD) simulation and mode-coupling theory (MCT). The autocorrelation function of the shear stress and the intermediate scattering functions at both the prepeak and the main peak were calculated from the MD trajectories. Their comparison based on MCT suggests that the viscoelastic relaxation in the ps regime is affected by the slow structural dynamics at the prepeak. On the other hand, the MCT for molecular liquids based on the interaction-site model (site-site MCT) fails to describe the coupling between the prepeak dynamics and shear stress. The direct evaluation of the coupling between the two-body density and the shear stress reveals that the viscoelastic relaxation is actually affected by the prepeak dynamics, although the coupling is not captured by the site-site MCT. The site-site MCT works well for a model methanol without partial charges, suggesting that the failure of the site-site MCT originates from the existence of a hydrogen-bonding network structure. Published by AIP Publishing.

    DOI: 10.1063/1.4990408

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  44. Analysis of Prepeak Structure of Concentrated Organic Lithium Electrolyte by Means of Neutron Diffraction with Isotopic Substitution and Molecular Dynamics Simulation Reviewed

    Tsuyoshi Yamaguchi, Koji Yoshida, Toshio Yamaguchi, Yasuo Kameda, Kazutaka Ikeda, Toshiya Otomo

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 121 ( 21 ) page: 5355 - 5362   2017.6

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    The prepeak structure of a 3 mol/kg solution,of LiCIC)(4) in propylene carlitinate (PC) was studied by both neutron diffraction with isotopic substitution (NDIS) and molecular dynamics (MD) simulation. The NDIS data showed that the intensity of the prepeak decreases experimentally with an increase in the scattering length of the lithium atom from Li-7 to Li-6 in PC-d(6). On the other hand, although the prepeak was observed in solutions of both PC-d(6) and PC-h(6), it disappears when the 1:1 mixture of PC-d(6) and PC-h(6) was used as the solvent. The prepeak structure and its variation with the isotope substitution were reproduced well by MD simulation, and they were explained in terms of the contrast of the scattering length densities of the ionic and nonpolar domains.

    DOI: 10.1021/acs.jpcb.7b00686

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  45. Viscoelastic relaxations of high alcohols and alkanes: Effects of heterogeneous structure and translation-orientation coupling Reviewed

    Tsuyoshi Yamaguchi

    Journal of Chemical Physics   Vol. 146 ( 9 ) page: 094511   2017.3

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  46. The Equation of State and the Temperature, Pressure and Shear Dependence of Viscosity for a Highly Viscous Reference Liquid, Dipentaerythritol Hexaisononanoate Reviewed

    Scott Bair, Tsuyoshi Yamaguchi

      Vol. 139 ( 1 ) page: 011801   2017.1

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    DOI: 10.1115/1.4033050

  47. Phase Separation Solvent for CO2 Capture Reviewed

    Machida Hiroshi, Esaki Takehiro, Oba Kazuki, Tomikawa Takashi, Yamaguchi Tsuyoshi, Horizoe Hirotoshi

    13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13   Vol. 114   page: 823 - 826   2017

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  48. Experimental study on the relationship between the frequency-dependent shear viscosity and the intermediate scattering function of representative viscous liquids Reviewed

    Tsuyoshi Yamaguchi

    Journal of Chemical Physics   Vol. 145 ( 19 ) page: 194505   2016.11

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  49. Reorientational Relaxation of Small Solutes in Viscoelastic Liquids Reviewed

    Tsuyoshi Yamaguchi, Yusuke Abe, Katsura Nishiyama

    Journal of Physical Chemistry B   Vol. 120 ( 9 ) page: 2491-2499   2016.3

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  50. Mode-coupling theoretical study on the roles of heterogeneous structure in rheology of ionic liquids Reviewed

    Tsuyoshi Yamaguchi

    Journal of Chemical Physics   Vol. 144 ( 12 ) page: 124514   2016.3

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  51. Relationship between Structural Relaxation, Shear Viscosity, and Ionic Conduction of LiPF6/Propylene Carbonate Solutions Reviewed

    Tsuyoshi Yamaguchi, Takuya Yonezawa, Koji Yoshida, Toshio Yamaguchi, Michihiro Nagao, Antonio Faraone, Shiro Seki

    Journal of Physical Chemistry B   Vol. 119 ( 51 ) page: 15675-15682   2015.12

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  52. Study on the temperature-dependent coupling among viscosity, conductivity and structural relaxation of ionic liquids Reviewed

    Tsuyoshi Yamaguchi, Takuya Yonezawa, Shinobu Koda

    Physical Chemistry Chemical Physics   Vol. 17   page: 19126-19133   2015.7

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  53. Dielectrically-consistent Stell correction for integral equation theory on electrolyte solutions Reviewed

    Tsuyoshi Yamaguchi, Shinobu Koda

    Bulletin of the Chemical Society of Japan   Vol. 88 ( 6 ) page: 804   2015.6

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  54. Bimodal dielectric relaxation of electrolyte solutions in weakly polar solvents Reviewed

    Tsuyoshi Yamaguchi, Shinobu Koda

    Journal of Chemical Physics   Vol. 141 ( 24 ) page: 244501   2014.12

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  55. Dielectric and shear relaxations of ionic liquid composed of symmetric ions Reviewed

    Tsuyoshi Yamaguchi, Shinobu Koda

    Journal of Chemical Physics   Vol. 141 ( 14 ) page: 144503   2014.10

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  56. Oscillatory and Steady Shear Viscosity: The Cox-Merz Rule, Superposition, and Application to EHL Friction Reviewed

    Scott Bair, Tsuyoshi Yamaguchi, Ludwig Brouwer, Hubert Schwarze, Philippe Vergne, Gerhard Poll

    Tribology International   Vol. 79   page: 126-131   2014.6

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  57. Quantitative Analysis of Conductivity and Viscosity of Ionic Liquids in Terms of Their Relaxation Times Reviewed

    Tsuyoshi Yamaguchi, Eiichiro Nakahara, Shinobu Koda

    Journal of Physical Chemistry B   Vol. 118 ( 21 ) page: 5752-5759   2014.5

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  58. Relationship Between Microviscosity and High-Frequency Viscosity of Polymer Gel Electrolytes Reviewed

    Tsuyoshi Yamaguchi, Ryo Matsui, Shinobu Koda

    Journal of Physical Chemistry B   Vol. 117 ( 23 ) page: 7077-7083   2013.6

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  59. Collective dynamics of room-temperature ionic liquids and their Li ion solutions studied by high-resolution inelastic X-ray scattering Reviewed

    Kenta Fujii, Mitsuhiro Shibayama, Tsuyoshi Yamaguchi, Koji Yoshida, Toshio Yamaguchi, Shiro Seki, Hiroshi Uchiyama, Alfred Q. R. Baron, Yasuhiro Umebayashi

    Journal of Chemical Physics   Vol. 138 ( 15 ) page: 151101   2013.4

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  60. Interpretation of the Variation of Walden Product of Ionic Liquids with Different Alkyl Chain Lengths in Terms of Relaxation Spectra Reviewed

    Tsuyoshi Yamaguchi, Eiichiro Nakahara, Keitaro Sueda, Shinobu Koda

    Journal of Physical Chemistry B   Vol. 117 ( 15 ) page: 4121-4126   2013.4

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  61. Rheological Bases for Empirical Rules on Shear Viscosity of Lubrication Oils Reviewed

    Tsuyoshi Yamaguchi, Taiga Akatsuka, Shinobu Koda

    Journal of Physical Chemistry B   Vol. 117 ( 11 ) page: 3232   2013.3

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  62. Effects of hydrodynamic interaction on the equivalent conductivity minimum of electrolyte solutions in solvents of low dielectric constant Reviewed

    Tsuyoshi Yamaguchi, Yuhei Shimoda, and Shinobu Koda

    Journal of Chemical Physics   Vol. 138 ( 2 ) page: 024503   2013.1

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  63. Relationship between mesoscale dynamics and shear relaxation of ionic liquids with long alkyl chain Reviewed

    Tsuyoshi Yamaguchi, Ken-ichi Mikawa, Shinobu Koda, Kenta Fujii, Hitoshi Endo, Mitsuhiro Shibayama, Hiroshi Hamano, Yasuhiro Umebayashi

    Journal of Chemical Physics   Vol. 137 ( 10 ) page: 104511   2012.9

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  64. Effects of Lithium Salts on Shear Relaxation Spectra of Pyrrolidinium-Based Ionic Liquids Reviewed

    Tsuyoshi Yamaguchi, Ken-ichi Mikawa, Shinobu Koda, Nobuyuki Serizawa, Shiro Seki, Kenta Fujii, Yasuhiro Umebayashi

    Journal of Physical Chemistry B   Vol. 116 ( 24 ) page: 7322-7327   2012.6

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  65. Shear and conductivity relaxations of lithium ion electrolytes in polyethyleneglycol dimethyl ethers Reviewed

    Tsuyoshi Yamaguchi, Yukihiro Yamada, Shinobu Koda

    Journal of Molecular Liquids   Vol. 172   page: 93-101   2012.6

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  66. Shear relaxation of water-ionic liquid mixtures Reviewed

    Tsuyoshi Yamaguchi, Ken-ichi Mikawa, Shinobu Koda

    Bulletin of the Chemical Society of Japan   Vol. 85 ( 6 ) page: 701-705   2012.6

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  67. Pseudo-critical behavior on the partial molar volume of solutes in the isotropic phase of liquid crystal Reviewed

    Tatsuro Matsuoka, Shunsuke Nakamura, Tsuyoshi Yamaguchi, Shinobu Koda

    Chemical Physics Letters   Vol. 521   page: 78-80   2012.1

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  68. Shear relaxation of ammonium- and phosphonium-based ionic liquids with oxyethylene chain Reviewed

    Tsuyoshi Yamaguchi, Ken-ichi Mikawa, Shinobu Koda, Hiroki Fukazawa, Hideaki Shirota

    Chemical Physics Letters   Vol. 521   page: 69-73   2012.1

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  69. Assignment of the dielectric relaxation of ionic liquid and its implication to the ionic conduction mechanism Reviewed

    Tsuyoshi Yamaguchi and Shinobu Koda

    Journal of Molecular Liquids   Vol. 164 ( 1-2 ) page: 49-52   2011.11

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  70. Brownian dynamics simulation of a model simple electrolyte in solvents of low dielectric constant Reviewed

    Tsuyoshi Yamaguchi, Taiga Akatsuka, and Shinobu Koda

    Journal of Chemical Physics   Vol. 134 ( 244506 ) page: 234506   2011.6

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  71. Roles of translational and reorientational modes in translational diffusion of high-pressure water: comparison with soft-core fluids Reviewed

    Tsuyoshi Yamaguchi and Shinobu Koda

    Journal of Chemical Physics   Vol. 134 ( 23 ) page: 234506   2011.6

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  72. Dynamic mechanism of equivalent conductivity minimum of electrolyte solution Reviewed

    Tsuyoshi Yamaguchi, Tatsuro Matsuoka, Shinobu Koda

    Journal of Chemical Physics   Vol. 135 ( 16 ) page: 164511   2011

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  73. Frequency-domain investigation of the ionic mobility of triflate salts in tetrahydrofuran Reviewed

    Tsuyoshi Yamaguchi, Yukihiro Yamada, Tatsuro Matsuoka, Shinobu Koda, Yoshiro Yasaka, and Nobuyuki Matubayasi

    Journal of Physical Chemistry B   Vol. 115 ( 43 ) page: 12327-12676   2011

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  74. Shear Relaxation of Imidazolium-Based Room-Temperature Ionic Liquids Reviewed

    Tsuyoshi Yamaguchi, Miyake Sho and Shinobu Koda

    Journal of Physical Chemistry B   Vol. 114 ( 24 ) page: 8126-8133   2010

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  75. Mode-coupling theoretical analysis of transport and relaxation properties of liquid dimethylimidazolium chloride Reviewed

    Tsuyoshi Yamaguchi and Shinobu Koda

    Journal of Chemical Physics   Vol. 132 ( 11 ) page: 114502   2010

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  76. Electric and mechanical relaxations of LiClO4-propylene carbonate systems in 100 MHz region Reviewed

    Tsuyoshi Yamaguchi, Masashi Hayakawa, Tatsuro Matsuoka, and Shinobu Koda

    Journal of Physical Chemistry B   Vol. 113 ( 35 ) page: 11988-11998   2009

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  77. Effects of frequency and power of ultrasound on the size reduction of liposome Reviewed

    Tsuyoshi Yamaguchi, Masaru Nomura, Tatsuro Matsuoka, and Shinobu Koda

    Chemistry and Physics of Lipids   Vol. 160 ( 1 ) page: 58-62   2009

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  78. A theoretical study on the frequency-dependent electric conductivity of electrolyte solutions II: Effect of hydrodynamic interaction Reviewed

    T. Yamaguchi, T. Matsuoka, and S. Koda

    Journal of Chemical Physics   Vol. 130 ( 9 ) page: 094506   2009

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  79. A three-variable theory on the translation-reorientation coupling of molecular liquids Reviewed

    T. Yamaguchi, M. Hayakawa, T. Matsuoka, and S. Koda

    Journal of Molecular Liquids   Vol. 147 ( 1-2 ) page: 2-8   2009

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  80. Solvation dynamics in polar solvents studied by means of RISM/mode-coupling theory Reviewed

    Nishiyama, Katsura; Yamaguchi, Tsuyoshi; Hirata, Fumio

    Journal of Physical Chemistry B   Vol. 113 ( 9 ) page: 2800-2804   2009

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  81. Dynamic solvophobic effect and its cooperativity in the hydrogen-bonding liquids studied by dielectric and nuclear magnetic resonance relaxation Reviewed

    Tsuyoshi Yamaguchi, Hiroki Furuhashi, Tatsuro Matsuoka, and Shinobu Koda

    Journal of Physical Chemistry B   Vol. 112 ( 51 ) page: 16633-16641   2008

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    The reorientational relaxation of solvent molecules in the mixture of nonpolar solutes and hydrogen-bonding liquids including water, alcohols and amides are studied by dielectric and 2H-nuclear magnetic resonance (NMR) spin-lattice relaxations. The retardation of the reorientational motion of the solvent by weak solute-solvent interaction is observed in all the solvent systems. On the other hand, no clear correlation between the strength of the solute-solvent interaction and the slowing down of the solvent motion is found in N,N-dimethylacetamide, which suggests the importance of the hydrogen bonding in the dynamic solvophobic effect. The cooperativity of the reorientational relaxation is investigated by the comparison between the collective relaxation measured by the dielectric spectroscopy and the single-molecular reorientation determined by NMR. The modification of the dielectric relaxation time caused by the dissolution of the solute is larger than that of the single-molecular reorientational relaxation time in all the solvents studied here. The effect of the static correlation between the dipole moments of different molecules is calculated from the static dielectric constant, and the effect of the dynamic correlation is estimated. The difference in the effects of the solutes on the collective and single-molecular reorientational relaxation is mainly ascribed to the dynamic cooperativity in the cases of water and alcohols, which is consistent with the picture on the dynamic solvophobicity derived by our previous theoretical analysis (Yamaguchi, T.; Matsuoka, T.; Koda, S. J. Chem. Phys. 2004, 120, 7590). On the other hand, the static correlation plays the principal role in the case of N-methylformamide.

  82. A theoretical study on the frequency-dependent electric conductivity of electrolyte solutions Reviewed

    T. Yamaguchi, T. Matsuoka, and S. Koda

    Journal of Chemical Physics   Vol. 127 ( 23 ) page: 234501   2007.12

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    The theory on the ultrasonic absorption of electrolyte solutions we have proposed previously [T. Yamaguchi, T. Matsuoka, and S. Koda, J. Chem. Phys., 126, 144505 (2007)] is extended to calculate the frequency-dependent electric conductivity of the solution. The ionic contribution of the dielectric relaxation spectrum is obtained at the same time.
    The theory is able to handle the contributions of both the ion-pair dynamics and the relaxation of ionic atmosphere, as is the case of ultrasonic absorption. The effect of the barrier height between the contact and solvent-separated ion pairs is investigated in detail. It is clarified that the competition between the dissociation and reorientational
    relaxation rates of the contact ion pair is an important factor for the ion pair to be regarded as the ion pair in terms of ionic conductivity.

  83. Translational friction and momentum dissipation of a solute in simple liquid studied by generalized Langevin theory for liquid under external field Reviewed

    T. Yamaguchi, T. Matsuoka, and S. Koda

    Journal of Molecular Liquids   Vol. 134 ( 1-3 ) page: 1-7   2007

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  84. Theoretical study on the sound absorption of electrolytic solutions. I. Theoretical formulation Reviewed

    T. Yamaguchi, T. Matsuoka, and S. Koda

    Journal of Chemical Physics   Vol. 126 ( 14 ) page: 144505   2007

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  85. Theoretical study on the sound absorption of electrolytic solutions. II. Assignment of Relaxations Reviewed

    T. Yamaguchi, T. Matsuoka, and S. Koda

    Journal of Chemical Physics   Vol. 127 ( 6 ) page: 064508   2007

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  86. Mode-coupling study on the dynamics of hydrophobic hydration II: Aqueous solutions of benzene and rare gases Reviewed

    T. Yamaguchi, T. Matsuoka, and S. Koda

    Physical Chemistry Chemical Physics   Vol. 8 ( 6 ) page: 737-745   2006

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  87. Study of anomalous mobility of polar molecular solutions by means of the site-site memory equation formalism Reviewed

    A.E. Kobryn, T. Yamaguchi, and F. Hirata

    Journal of Molecular Liquids   Vol. 125 ( 1 ) page: 14-21   2006

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  88. Solute Dependence of Mobility of Solvent Molecules in Solvophobic Solute Solutions: Dielectric Relaxation of Nonpolar Solute / Alcohol Mixtures Reviewed

    A. Nagao, T. Yamaguchi, T. Matsuoka, and S. Koda

    Journal of Physical Chemistry A   Vol. 110 ( 10 ) page: 3377   2006

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    The dielectric relaxation spectra of alcohol/nonpolar solute mixtures are measured at several temperatures (-15CT25C) and for several molar fractions of solute (0Xs0.114) in the frequency range of 200MHzν20GHz. The double Debye type function is used for fitting of the spectra of mixtures, and the mean dielectric relaxation times (mean) of alcohol molecules are determined. In the systems having strong interaction between alcohol and nonpolar solutes, mean becomes shorter with an increase in the concentration of the solutes. On the other hand, mean becomes longer in the system having weak interaction between alcohol and nonpolar solutes. These results contradict with our intuitive predictions, do not correspond to mixing enthalpy, and are not explained by the hydrodynamic theory. They are attributed to the mechanism of the coupling between long-range electrostatic interactions and concentration fluctuation caused by the addition of solutes, which is suggested by Yamaguchi et al. based on the mode-coupling theory. [Yamaguchi, T.; Matsuoka, T.; Koda. S. J. Chem. Phys. 2004, 120, 7590]

  89. Multi-pH Monte Carlo Simulation of Coil-Globule transition of weak polyelectrolyte Reviewed

    T. Yamaguchi, T. Kiuchi, T. Matsuoka and S. Koda

    Bulletin of the Chemical Society of Japan   Vol. 78   page: 2098   2005

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    A multi-pH generalized ensemble simulation method is proposed; it is applied to the titration of the model weak polyelectrolyte. The first-order coil-globule transition is found in a poor solvent case. The conformation of the transition state is closely examined.

  90. Observation of Ultrasonic Relaxation due to Micelle-Monomer Exchange Process in Aqueous Solutions of Rodlike Micelles Reviewed

    Tatsuro Matsuoka, Yukihiro Masuda, Tsuyoshi Yamaguchi and Shinobu Koda

    Japanese Journal of Applied Physics   Vol. 43 ( 5B ) page: 2924-2925   2005

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  91. Nuclear Magnetic Resonance and Molecular Dynamics Simulation Study on the Reorientational Relaxation of Solutes in Supercritical Methanol Reviewed

    Tsuyoshi Yamaguchi, Nobuyuki Matubayasi, and Masaru Nakahara

    Journal of Molecular Liquids   Vol. 119 ( 1-3 ) page: 119-123   2005

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  92. Solvation dynamics in water investigated by RISM/mode-coupling theory Reviewed

    Katsura Nishiyama, Tsuyoshi Yamaguchi, Fumio Hirata, and Tadashi Okada

    Journal of Molecular Liquids   Vol. 119 ( 1-3 ) page: 63-66   2005

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  93. Pressure dependence of diffusion coefficient and orientational relaxtion time for acetonitrile and methanol in water: DRISM/mode-coupling study Reviewed

    A. E. Kobryn, T. Yamaguchi, and F. Hirata

    Journal of Molecular Liquids   Vol. 119 ( 1-3 ) page: 7-13   2005

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  94. Molecular dynamics simulation study on the transient response of solvation structure during the translational diffusion of solute Reviewed

    T. Yamaguchi, T. Matsuoka, and S. Koda

    Journal of Chemical Physics   Vol. 122 ( 1 ) page: 014512   2005

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  95. Site-site memory equation approach in study of density/pressure dependence of translational diffusion coefficient and rotational relaxation time of polar molecular solutions: acetonitrile in water, methanol in water, and methanol in acetonitrile Reviewed

    A. E. Kobryn, T. Yamaguchi, and F. Hirata

    Journal of Chemical Physics   Vol. 122 ( 18 ) page: 184511   2005

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    Language:English   Publishing type:Research paper (scientific journal)  

  96. Generalized Langevin theory on the dynamics of simple fluids under external fields Reviewed

    T. Yamaguchi, T. Matsuoka and S. Koda

    Journal of Chemical Physics   Vol. 123 ( 3 ) page: 034504   2005

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  97. Solute dependence of polar solvation dynamics studied by RISM/mode-coupling theory Reviewed

    Katsura Nishiyama, Tsuyoshi Yamaguchi, Fumio Hirata, and Tadashi Okada

    Journal of Solution Chemistry   Vol. 33 ( 6-7 ) page: 631-639   2004

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  98. Polar solvation dynamics: A combination of the reference interaction-site model and mode-coupling theories

    Katsura Nishiyama, Tsuyoshi Yamaguchi, Fumio Hirata and Tadashi Okada

    Pure and Applied Chemistry   Vol. 76 ( 1 ) page: 71-77   2004

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  99. Nuclear Magnetic Resonance Study on the Reorientational Relaxation in Supercritical Alcohols Reviewed

    Tsuyoshi Yamaguchi, Nobuyuki Natubayasi, and Masaru Nakahara

    Journal of Physical Chemistry A   Vol. 108 ( 8 ) page: 1319-1324   2004

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  100. Mode-coupling analysis of the translational and rotational diffusion of polar liquids; acetonitrile and water Reviewed

    T. Yamaguchi, S.-H. Chong and F. Hirata

    Journal of Molecular Liquids   Vol. 112 ( 3 ) page: 117-124   2004

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  101. Mode-coupling study on the dynamics of hydrophobic hydration Reviewed

    T. Yamaguchi, T. Matsuoka and S. Koda

    Journal of Chemical Physics   Vol. 120   page: 7590-7601   2004

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    The molecular motion of water in water-hydrophobic solute mixtures was investigated by the mode-coupling theory for molecular liquids based on the interaction-site description. When the model Lennard-Jones (LJ) solute
    was mixed with water, both the translational and reorientational motions of solvent water
    become slower, in harmony with various experiments and
    molecular dynamics simulations. We compared the mechanism of the slowing down with that of the pressure dependence of the molecular motion of neat water [T. Yamaguchi, S.-H. Chong and F. Hirata, J. Chem. Phys. 119, 1021-1034 (2003)]. We found that the decrease in the solvent mobility caused by the solute can essentially
    be elucidated by the same mechanism, that is, the fluctuation of the number density of solvent due to the cavity formation by the solute strengthens the friction on the collective polarization through the dielectric friction mechanism. We also employed the solute molecule
    that is the same as solvent water except for the amount of
    partial charges, in order to alter the strength of the solute-solvent interaction continuously.
    The mobility of the solvent water was reduced both by
    the hydrophobic and strongly hydrophilic solutes, but it
    was enhanced in the intermediate case. Such a behavior was discussed in connection with the concept of positive and negative hydrations.

  102. The statistical mechanics of the electro-acoustic effects of liquids Reviewed

    T. Yamaguchi, T. Matsuoka and S. Koda

    Journal of Chemical Physics   Vol. 119   page: 4437-4448   2003

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  103. Mode-coupling calculation of the anomalous pressure effect on the ionic conductivity of molten LiBr Reviewed

    T. Yamaguchi, T. Matsuoka and S. Koda

    Journal of Chemical Physics   Vol. 119 ( 21 ) page: 11306-11317   2003

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  104. A theoretical study on the anomalous pressure dependence of the transport properties of ionic liquids:Comparison among lithium bromide, silica and water Reviewed

    T. Yamaguchi, A. Nagao, T. Matsuoka and S. Koda

    Journal of Chemical Physics   Vol. 119   page: 11306-11317   2003

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  105. Theoretical study on the molecular motion of liquid water under high pressure Reviewed

    T. Yamaguchi, S.-H. Chong, and F. Hirata

    Journal of Chemical Physics   Vol. 119   page: 1021-1034   2003

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  106. Dielectric relaxation spectrum of water studied by the site-site generalized Langevin / modified mode-coupling theory Reviewed

    T. Yamaguchi, S.-H. Chong, and F. Hirata

    Molecular Physics   Vol. 101   page: 1211-1220   2003

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  107. The Study of the Nonpolar Solvation Dynamics in Supercritical Lennard-Jones Fluids in Terms of the Solvent Dynamic Structure Factor Reviewed

    T. Yamaguchi, Y. Kimura and M. Nakahara

    Journal of Physical Chemistry B   Vol. 106 ( 35 ) page: 9126-9134   2002

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  108. Translational diffusion and reorientational realxation of water analyzed by site-site generalized Langevin theory Reviewed

    T. Yamaguchi, S.-H. Chong, and F. Hirata

    Journal of Chemical Physics   Vol. 116   page: 2502-2507   2002

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  109. Interaction-site model description of the reorientational relaxation of molecular liquids: Incorporation of the interaxial coupling into the site-site generalized Langevin / mode-coupling theory Reviewed

    T. Yamaguchi and F. Hirata

    Journal of Chemical Physics   Vol. 117   page: 2216-2224   2002

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  110. Site-site mode coupling theory for the shear viscosity of molecular liquids Reviewed

    T. Yamaguchi and F. Hirata

    Journal of Chemical Physics   Vol. 115   page: 9340-9345   2001

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  111. Non-Gaussian dynamics of a dilute hard-sphere gas Reviewed

    T. Yamaguchi and Y. Kimura

    Journal of Chemical Physics   Vol. 114   page: 3029-3034   2001

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  112. A mode-coupling approach to the attractive interaction effect on the solute diffusion in liquids Reviewed

    T. Yamaguchi, N. Matubayasi, and M. Nakahara

    Journal of Chemical Physics   Vol. 115   page: 422-432   2001

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  113. Effects of the solute-solvent and solvent-solvent attractive interactions on solute diffusion Reviewed

    T. Yamaguchi and Y. Kimura

    Molecular Physics   Vol. 98   page: 1553-1563   2000

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  114. Vibrational overtone dephasing in liquids under the influence of non-Gaussian noise Reviewed

    T. Yamaguchi

    Journal of Chemical Physics   Vol. 114   page: 8530-8533   2000

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  115. Photo-excitation dynamics of phenol blue Reviewed

    Y. Kimura, T. Yamaguchi, and N. Hirota

    Physical Chemistry Chemical Physics   Vol. 2   page: 1415-1420   2000

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  116. Vibrational energy relaxation of azulene in the S2 state I: Solvent species dependence Reviewed

    T. Yamaguchi, Y. Kimura, and N. Hirota

    Journal of Chemical Physics   Vol. 113   page: 2772-2783   2000

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  117. Vibrational energy relaxation of azulene in the S2 state II: Solvent density dependence Reviewed

    T. Yamaguchi, Y. Kimura, and N. Hirota

    Journal of Chemical Physics   Vol. 113   page: 4340-4348   2000

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  118. The role of the attractive and the repulsive interactions in the nonpolar solvation dynamics in simple fluids from the gas-like to the liquid-like densities Reviewed

    T. Yamaguchi, Y. Kimura, and N. Hirota

    Journal of Chemical Physics   Vol. 111   page: 4169-4185   1999

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  119. Vibrational energy relaxation rates in the S2 state of azulene in nitrogen and carbon dioxide Reviewed

    Y. Kimura, T. Yamaguchi, and N. Hirota

    Chemical Physics Letters   Vol. 303   page: 223-228   1999

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  120. Solvation state selective excitation in resonance Raman spectroscopy II: Theoretical calculation Reviewed

    T. Yamaguchi, Y. Kimura, and N. Hirota

    Journal of Chemical Physics   Vol. 109   page: 9084-9095   1998

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  121. Molecular dynamics simulation of solute diffusion in Lennard-Jones fluids Reviewed

    T. Yamaguchi, Y. Kimura, and N. Hirota

    Molecular Physics   Vol. 94   page: 527-537   1998

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  122. Solvation state selective excitation in resonance Raman spectroscopy I: Experimental study on the C=N and the C=O stretching mode of phenol blue Reviewed

    T. Yamaguchi, Y. Kimura, and N. Hirota

    Journal of Chemical Physics   Vol. 109   page: 9075-9083   1998

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  123. The excitation energy dependence of the Raman Stokes shift: the resonance Raman spectra of phenol blue in methanol Reviewed

    T. Yamaguchi, Y. Kimura, and N. Hirota

    Journal of Chemical Physics   Vol. 107   page: 4436-4438   1997

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  124. Solvent and Solvent Density Effects on the Spectral Shifts and the Bandwidths of the Absorption and the Resonance Raman Spectra of Phenol Blue Reviewed

    T. Yamaguchi, Y. Kimura, and N. Hirota

    Journal of Physical Chemistry A   Vol. 101   page: 9050-9060   1997

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▼display all

Books 3

  1. Dynamics of Molecular Liquids: From Water to Ionic Liquids Reviewed

    Tsuyoshi Yamaguchi( Role: Sole author)

    Springer, Singapore  2021 

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    Total pages:34   Language:English Book type:Scholarly book

    DOI: 10.1007/978-981-16-5395-7_3

  2. Overview of Liquids and Liquid-Based Systems Reviewed

    Toshiyuki Takamuku, Tsuyoshi Yamaguchi( Role: Joint author)

    Springer, Singapore  2021 

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    Total pages:12   Language:English Book type:Scholarly book

    DOI: 10.1007/978-981-16-5395-7_1

  3. 第6版 電気化学便覧 3.1「電解質溶液」

    梅林泰宏、山口毅( Role: Joint author)

    丸善  2013.1 

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    Language:Japanese

Presentations 61

  1. 高圧水の体積粘性率と超音波緩和

    山口 毅

    日本物理学会年次大会  2022.3.17 

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  2. Dynamics of Liquids with Multiscale Structure Invited International conference

    Tsuyoshi Yamaguchi

    Pacifichem 2021  2021.12.21 

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    Event date: 2021.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:United States  

  3. 分子動力学シミュレーションによるエタノール水溶液の超音波緩和の研究

    山口 毅

    第35回分子シミュレーション討論会  2021.11.29 

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    Event date: 2021.11 - 2021.12

    Language:Japanese   Presentation type:Oral presentation (general)  

  4. 溶媒の不均一構造のダイナミクスと小さい溶質分子の並進拡散のカップリング

    山口 毅

    第43回溶液化学シンポジウム  2021.10.28 

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    Event date: 2021.10

    Language:Japanese   Presentation type:Oral presentation (general)  

  5. 無電極水晶振動子を用いた液体のGHz領域に至る粘性測定 International conference

    山口 毅

    第42回超音波エレクトロニクスの基礎と応用に関するシンポジウム  2021.10.27 

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    Event date: 2021.10

    Language:Japanese   Presentation type:Poster presentation  

  6. 無電極QCM-D法による液体のGHz領域における粘弾性測定

    山口 毅

    第15回分子科学討論会  2021.9.21 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Poster presentation  

  7. 高級アルコールの不均一構造のダイナミクスと溶質拡散のカップリング

    山口 毅

    第23回理論化学討論会  2021.5.13 

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    Event date: 2021.5

    Language:Japanese   Presentation type:Poster presentation  

  8. 粘弾性溶媒中の溶質拡散の周波数依存性

    山口 毅

    日本物理学会年次大会  2021.3.14  日本物理学会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  9. 液体アルコールの誘電高周波プロセスと構造緩和のカップリング

    山口 毅

    日本物理学会秋季大会  2020.9.9  日本物理学会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  10. Effects of mesoscopic domain structure on shear viscosity of ionic liquids Invited International conference

    Tsuyoshi Yamaguchi

    225th ACS Annual Meeting 

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    Event date: 2018.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:New Orleans, USA   Country:United States  

  11. 液体の高周波レオロジー:原理から応用まで Invited

    山口 毅

    日本材料学会第66期学術講演会 

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名城大学天白キャンパス   Country:Japan  

  12. 濃厚有機リチウム電解液のプレピーク構造:MD シミュレーションと中性子散乱による研究

    山口毅、吉田亨次、山口敏男、亀田恭男、池田一貴、大友季哉

    第39回溶液化学シンポジウム 

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    Event date: 2016.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:産業技術総合研究所(つくば市)   Country:Japan  

  13. Liquid state theory for dynamics of electrochemical materials International conference

    Tsuyoshi Yamaguchi

    Pacifichem 2015 

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    Event date: 2015.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:United States  

  14. イオン伝導性液体の構造緩和と輸送物性

    山口 毅

    電気化学会第82回大会 

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    Event date: 2015.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  15. イオン液体・電解質溶液の輸送物性に関する研究

    山口 毅

    第37回溶液化学シンポジウム 

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    Event date: 2014.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  16. Experimental examination of the mode-coupling theoretical view on the transport properties of ionic systems International conference

    Tsuyoshi Yamaguchi

    International Meeting on Applications of Statistical Mechanics of Molecular Liquid on Soft Matter 

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    Event date: 2014.9

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Thailand  

  17. Study on Transport Properties of room-temperature ionic liquids using relaxation measurements International conference

    Tsuyoshi Yamaguchi, Shinobu Koda

    9th Liquid Matter Conference 

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    Event date: 2014.7

    Language:English   Presentation type:Poster presentation  

    Country:Portugal  

  18. 溶質拡散に対する込み合いと分子間引力の効果の理論的研究

    山口 毅

    日本物理学会年次大会 

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    Event date: 2014.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東海大学   Country:Japan  

  19. イオン液体の構造緩和と輸送物性

    山口毅,中原栄一郎,米澤拓也,香田忍

    第36回溶液化学シンポジウム 

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    Event date: 2013.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:北海道大学札幌キャンパス   Country:Japan  

  20. ポリマーゲル電解液の局所粘度と高周波粘度の相関

    山口 毅, 松井 亮, 香田 忍

    電気化学会第80回大会 

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    Event date: 2013.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  21. イオン液体の粘度・伝導度の周波数依存性と構造緩和との比較

    山口 毅, 中原 栄一郎, 香田 忍

    日本物理学会第68回年次大会 

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    Event date: 2013.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  22. アルキル鎖長の異なるイミダゾリウム系イオン液体の緩和スペクトルとワルデン則

    山口 毅, 末田 圭太郎, 三河 健一, 中原 栄一郎, 香田 忍

    第35回溶液化学シンポジウム 

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    Event date: 2012.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  23. ポリマー系電解液のワルデン則: 緩和スペクトルからのアプローチ

    山口 毅, 松井 亮, 香田 忍

    アジア連携分子研研究会「溶液・ソフトマターの新局面:実験及び理論研究手法の開拓と新規物性探索への展開」 

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    Event date: 2012.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  24. Mode-coupling theoretical study on the reorientational relaxation of water in the presence of hydrophobic solute International conference

    Tsuyoshi Yamaguchi

    Workshop on Exploring the Structures and Dynamics of Water at Interfaces 

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    Event date: 2012.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  25. 低誘電率溶媒中のイオン伝導に対する流体力学相互作用の効果

    山口 毅, 下田 裕平, 香田 忍

    日本物理学会年次大会 

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    Event date: 2012.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  26. 1-octyl-3-methylimidazolium chlorideの粘性緩和:中性子準弾性散乱との比較

    山口 毅, 三河 健一, 香田 忍

    第二回イオン液体討論会 

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    Event date: 2011.12

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  27. ポリマー媒質中のイオンの協同的並進ダイナミクス

    山口 毅, 山田 幸弘, 香田 忍

    分子科学討論会 

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    Event date: 2011.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  28. Molar conductivity minimum of electrolyte solutions in solvents of low polarity

    Tsuyoshi Yamaguchi, Shinobu Koda

    The 5th international mini-symposium on liquids  

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    Event date: 2011.6

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  29. ポリエチレンオキシド系リチウムイオン電解液の伝導度分散と粘性緩和

    山口 毅,山田 幸弘,香田 忍

    電気化学会年次大会 

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    Event date: 2011.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  30. モード結合理論による水と階段ポテンシャル流体の拡散係数の密度依存性の比較

    山口 毅,香田 忍

    日本物理学会年次大会 

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    Event date: 2011.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  31. ブラウン動力学シミュレーションによる低誘電率溶媒中のイオン輸送に関する研究

    山口 毅,赤塚 大賀,香田 忍

    溶液化学シンポジウム 

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    Event date: 2010.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  32. Shear relaxation and ionic transport of imidazolium-based ionic liquids International conference

    Tsuyoshi Yamaguchi, Sho Miyake, Shinobu Koda

    EMLG/JMLG Annual Meeting 

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    Event date: 2010.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Ukraine  

  33. イミダゾリウム系イオン液体のメガヘルツ領域における粘性緩和

    山口 毅三宅 翔香田 忍

    電気化学会第77回大会 

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    Event date: 2010.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  34. 電解質溶液のモル伝導度極小の出現機構:シミュレーションとの比較

    山口 毅、香田 忍

    第65回日本物理学会年次大会 

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    Event date: 2010.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  35. ずりインピーダンス法によるイオン液体の粘性緩和の研究

    山口 毅三宅 翔香田 忍

    第32回溶液化学シンポジウム 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  36. リポソームの酸化に対する超音波照射時間と周波数の効果

    福崎怜奈山口 毅香田 忍

    第40回中化連 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  37. 表面増強ラマン法による金属表面吸着分子の超音波洗浄過程の観察

    榊原優一山口 毅香田 忍

    第18回ソノケミストリー討論会 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  38. 超音波照射による脂質二重膜の酸化の研究

    福崎怜奈山口 毅香田 忍

    第18回ソノケミストリー討論会 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  39. モード結合理論によるイオン液体の集団的ダイナミクスの研究

    山口 毅香田 忍

    第3回分子科学討論会 

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    Event date: 2009.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  40. ずりインピーダンス法によるLiClO4/PC系溶液の粘性緩和の研究

    山口 毅、松岡辰郎、香田 忍

    電気化学会 

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    Event date: 2009.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  41. モード結合理論による電解質溶液のモル伝導度極小の出現機構

    山口毅、松岡辰郎、香田忍

    日本物理学会年次大会 

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    Event date: 2008.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  42. モデル会合性電解質溶液のモル電気伝導度極小の理論的解析

    山口 毅、松岡辰郎、香田 忍

    第31回溶液化学シンポジウム 

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    Event date: 2008

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  43. 銀ナノコロイド表面吸着分子のSERSに対する超音波照射効果の研究

    山口 毅、松岡辰郎、香田 忍

    第2回分子科学討論会 

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    Event date: 2008

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  44. 多価電解質水溶液のMHzからGHz領域に現れる緩和の理論的解析

    山口毅、松岡辰郎、香田忍

    日本物理学会年次大会 

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    Event date: 2007.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  45. 水素結合性液体/無極性溶質混合系における回転緩和機構の協同性の研究

    古橋広樹、山口毅、松岡辰郎、香田忍

    第一回分子科学討論会 

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    Event date: 2007

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  46. 高濃度電解質溶液の電気伝導度分散の統計力学理論

    山口毅、松岡辰郎、香田忍

    理論化学討論会 

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    Event date: 2007

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  47. Study of Reorientational Relaxation Mechanism of Solvent Molecule in Hydrogen Bonded Solvent / Nonpolar Solute Mixtures

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    Event date: 2007

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  48. The Pseudo-Critical Effect on The Partial Molar Volume of Solutes in The Isotropic Phase of Liquid Crystals

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    Event date: 2007

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  49. Frequency and power effects of ultrasound on liposome solution

    International Symposium on Sonochemistry and Sonoprocessing 2007 

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    Event date: 2007

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  50. Dynamics of Liquids with Strong Coulombic Interaction

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    Event date: 2007

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  51. Theoretical study on the ion pair dynamics in the bulk relaxation spectra and conductivity of electrolyte solutions

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    Event date: 2007

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  52. ベシクル水溶液に対する超音波照射効果の研究

    野村勝、山口毅、松岡辰郎、香田忍

    第15回ソノケミストリー討論会 

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    Event date: 2006.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  53. 電解質水溶液の超音波吸収の理論計算の試み

    山口毅、松岡辰郎、香田忍

    第19回分子シミュレーション討論会 

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    Event date: 2006.1

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  54. Statistical Mechanical calculation of the ultrasonic relaxation of salt solutions

    USE2006 

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    Event date: 2006

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  55. 超音波緩和から見たイオン対のダイナミクスの理論的研究

    山口毅、松岡辰郎、香田忍

    第29回溶液化学シンポジウム 

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    Event date: 2006

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  56. Theoretical analysis on the transient response of solvation structure around a diffusing molecule International conference

    EMLG meeting 2005 

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    Event date: 2005

    Language:English   Presentation type:Poster presentation  

  57. 不均一場下の液体のダイナミクスの理論による溶質の並進拡散過程の研究

    山口毅、松岡辰郎、香田忍

    第28回溶液化学シンポジウム 

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    Event date: 2005

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  58. 流動下にある流体の分子配向に関する分子動力学法による研究

    山口毅、松岡辰郎、香田忍

    日本物理学会秋季大会 

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    Event date: 2005

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  59. Phase Separation Solvent for CO2 Capture

    Machida Hiroshi, Esaki Takehiro, Oba Kazuki, Tomikawa Takashi, Yamaguchi Tsuyoshi, Horizoe Hirotoshi

    13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13  2017 

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    Language:English   Presentation type:Oral presentation (general)  

  60. Effects of mesoscopic domain structure on shear viscosity of ionic liquids Invited

    Tsuyoshi Yamaguchi

    225th ACS Annual Meeting  2018.3.18 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:New Orleans, USA  

  61. 液体の高周波レオロジー:原理から応用まで Invited International conference

    山口 毅

    日本材料学会第66期学術講演会  2017.5.27 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名城大学天白キャンパス  

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Research Project for Joint Research, Competitive Funding, etc. 2

  1. 緩和測定による高粘性電解液の輸送物性発現機構の解析法の開発

    2011.4 - 2012.3

    「豊田理研スカラー」研究助成金 

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    Grant type:Competitive

  2. イオン液体の粘性発現機構の実験的・理論的研究

    2009.9

    三菱化学研究奨励基金 

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    Grant type:Competitive

KAKENHI (Grants-in-Aid for Scientific Research) 9

  1. 動的溶液科学の推進

    Grant number:22H05087  2022.5 - 2025.3

    科学研究費助成事業  学術変革領域研究(B)

    関山 直孝, 菅瀬 謙治, 吉田 紀生, 中村 秀樹, 山口 毅

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    Authorship:Coinvestigator(s) 

    本研究領域は、化学的・物理的な状態が時空間的に変動する動的溶液環境に着目し、動的溶液環境が天然変性タンパク質の自己凝縮過程を制御する機構の解明を目指す。そのために、各計画研究で得られた結果や知見を統合し相互循環させることで力強く領域を推進する。加えて、領域内で得られた研究成果や研究手法を幅広い分野に向けて発信し、同時に他分野の知見も積極的に取り入れることで、本研究領域の発展を目指す。

  2. Theoretical study of self-condensation process of intrinsically disordered proteins in dynamic solution environment

    Grant number:22H05089  2022.5 - 2025.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Transformative Research Areas (B)

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    Authorship:Coinvestigator(s) 

  3. Development of electron transfer dynamics theory of biological systems highly incorporating solvent response

    Grant number:19H02677  2019.4 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  4. Study on rheology of liquids with multiscale structures by means of high-frequency shear impedance spectroscopy

    Grant number:19K03768  2019.4 - 2022.3

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3900000 ( Direct Cost: \3000000 、 Indirect Cost:\900000 )

  5. Decoupling between shear viscosity and structural relaxation of viscous liquids

    Grant number:16K05514  2016.4 - 2019.3

    Yamaguchi Tsuyoshi

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\4680000 ( Direct Cost: \3600000 、 Indirect Cost:\1080000 )

    We have presented an experimental method to extract the microscopic structure coupled to shear viscosity by means of the combination of frequency-dependent complex shear viscosity and the neutron or X-ray quasielastic scattering. When the static structure is characterized by the strong main peak corresponding to the intermolecular contact distance, the structural relaxation at the main peak is shown to dominate the viscoelastic relaxation. The same methodology was also applied to liquids possessing prepeak reflecting the intermediate-range structures, such as ionic liquids with a long alkyl chain and higher alcohols. The structural relaxation at the prepeak contributes significantly to the shear stress in the case of higher alcohol, whereas the coupling is rather weak in the case of ionic liquids.

  6. 相分離型省エネルギーCO2吸収剤の開発

    2015.10 - 2019.3

    科学技術振興機構  先端的低炭素化技術 

    町田 洋

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    Grant type:Competitive

  7. 周波数軸から見たイオン液体のワルデン積の研究

    2012.4 - 2015.3

    科学研究費補助金  基盤研究(C)

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    Authorship:Principal investigator 

  8. 電気的・力学的緩和法によるポリマー電解液の輸送物性の研究

    2010.4 - 2012.3

    科学研究費補助金  若手研究(B)

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    Authorship:Principal investigator 

  9. 電解質溶液のモル電気伝導度極小に対するFuoss-Krausモデルの再検討

    2008.4 - 2010.3

    科学研究費補助金  若手研究(B)

    山口 毅

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    Authorship:Principal investigator 

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Teaching Experience (On-campus) 27

  1. 学生実験2

    2020

  2. 学生実験1

    2020

  3. 学生実験1

    2019

  4. 学生実験2

    2019

  5. 物理化学実験

    2018

  6. 化学工学実験

    2018

  7. 物理化学実験

    2017

  8. プロセス基礎セミナー

    2017

  9. 化学工学実験

    2017

  10. 化学工学実験

    2016

  11. プロセス基礎セミナー

    2016

  12. 物理化学実験

    2016

  13. 物理化学実験

    2015

  14. 化学工学実験

    2015

  15. プロセス基礎セミナー

    2015

  16. プロセス基礎セミナー

    2014

  17. 物理化学実験

    2014

  18. 化学工学実験

    2014

  19. プロセス基礎セミナー

    2013

  20. 化学工学実験

    2013

  21. 物理化学実験

    2013

  22. プロセス基礎セミナー

    2012

  23. 物理化学実験

    2012

  24. 化学工学実験

    2012

  25. 化学工学実験

    2011

  26. プロセス基礎セミナー

    2011

  27. 物理化学実験

    2011

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Teaching Experience (Off-campus) 1

  1. 環境化学・分析

    2020.9 - 2020.1

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    Level:Undergraduate (specialized)