研究者詳細 - 山口　毅

論文 - 山口　毅

分割表示 138 件中 81 - 100 件目／全件表示 >>

Pseudo-critical behavior on the partial molar volume of solutes in the isotropic phase of liquid crystal 査読有り

Tatsuro Matsuoka, Shunsuke Nakamura, Tsuyoshi Yamaguchi, Shinobu Koda

Chemical Physics Letters 521 巻頁： 78-80 2012年1月

Shear relaxation of ammonium- and phosphonium-based ionic liquids with oxyethylene chain 査読有り

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

Chemical Physics Letters 521 巻頁： 69-73 2012年1月

Assignment of the dielectric relaxation of ionic liquid and its implication to the ionic conduction mechanism 査読有り

Tsuyoshi Yamaguchi and Shinobu Koda

Journal of Molecular Liquids 164 巻 ( 1-2 ) 頁： 49-52 2011年11月

Roles of translational and reorientational modes in translational diffusion of high-pressure water: comparison with soft-core fluids 査読有り

Tsuyoshi Yamaguchi and Shinobu Koda

Journal of Chemical Physics 134 巻 ( 23 ) 頁： 234506 2011年6月

Brownian dynamics simulation of a model simple electrolyte in solvents of low dielectric constant 査読有り

Tsuyoshi Yamaguchi, Taiga Akatsuka, and Shinobu Koda

Journal of Chemical Physics 134 巻 ( 244506 ) 頁： 234506 2011年6月

Dynamic mechanism of equivalent conductivity minimum of electrolyte solution 査読有り

Tsuyoshi Yamaguchi, Tatsuro Matsuoka, Shinobu Koda

Journal of Chemical Physics 135 巻 ( 16 ) 頁： 164511 2011年

Frequency-domain investigation of the ionic mobility of triflate salts in tetrahydrofuran 査読有り

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

Journal of Physical Chemistry B 115 巻 ( 43 ) 頁： 12327-12676 2011年

Shear Relaxation of Imidazolium-Based Room-Temperature Ionic Liquids 査読有り

Tsuyoshi Yamaguchi, Miyake Sho and Shinobu Koda

Journal of Physical Chemistry B 114 巻 ( 24 ) 頁： 8126-8133 2010年

Mode-coupling theoretical analysis of transport and relaxation properties of liquid dimethylimidazolium chloride 査読有り

Tsuyoshi Yamaguchi and Shinobu Koda

Journal of Chemical Physics 132 巻 ( 11 ) 頁： 114502 2010年

Solvation dynamics in polar solvents studied by means of RISM/mode-coupling theory 査読有り

Nishiyama, Katsura; Yamaguchi, Tsuyoshi; Hirata, Fumio

Journal of Physical Chemistry B 113 巻 ( 9 ) 頁： 2800-2804 2009年

Electric and mechanical relaxations of LiClO4-propylene carbonate systems in 100 MHz region 査読有り

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

Journal of Physical Chemistry B 113 巻 ( 35 ) 頁： 11988-11998 2009年

Effects of frequency and power of ultrasound on the size reduction of liposome 査読有り

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

Chemistry and Physics of Lipids 160 巻 ( 1 ) 頁： 58-62 2009年

A theoretical study on the frequency-dependent electric conductivity of electrolyte solutions II: Effect of hydrodynamic interaction 査読有り

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

Journal of Chemical Physics 130 巻 ( 9 ) 頁： 094506 2009年

A three-variable theory on the translation-reorientation coupling of molecular liquids 査読有り

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

Journal of Molecular Liquids 147 巻 ( 1-2 ) 頁： 2-8 2009年

Dynamic solvophobic effect and its cooperativity in the hydrogen-bonding liquids studied by dielectric and nuclear magnetic resonance relaxation 査読有り

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

Journal of Physical Chemistry B 112 巻 ( 51 ) 頁： 16633-16641 2008年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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.

A theoretical study on the frequency-dependent electric conductivity of electrolyte solutions 査読有り

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

Journal of Chemical Physics 127 巻 ( 23 ) 頁： 234501 2007年12月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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.

Translational friction and momentum dissipation of a solute in simple liquid studied by generalized Langevin theory for liquid under external field 査読有り

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

Journal of Molecular Liquids 134 巻 ( 1-3 ) 頁： 1-7 2007年

Theoretical study on the sound absorption of electrolytic solutions. I. Theoretical formulation 査読有り

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

Journal of Chemical Physics 126 巻 ( 14 ) 頁： 144505 2007年

Theoretical study on the sound absorption of electrolytic solutions. II. Assignment of Relaxations 査読有り

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

Journal of Chemical Physics 127 巻 ( 6 ) 頁： 064508 2007年

Mode-coupling study on the dynamics of hydrophobic hydration II: Aqueous solutions of benzene and rare gases 査読有り

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

Physical Chemistry Chemical Physics 8 巻 ( 6 ) 頁： 737-745 2006年

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