2022/05/12 更新

写真a

スイヅ リエ
水津 理恵
SUIZU Rie
所属
大学院理学研究科 理学専攻 化学 特任助教
職名
特任助教

学位 1

  1. 博士(理学) ( 2001年3月   東北大学 ) 

研究キーワード 2

  1. チアジルラジカル

  2. 強等方性

研究分野 2

  1. ナノテク・材料 / 基礎物理化学

  2. ナノテク・材料 / 機能物性化学

経歴 13

  1. 科学技術振興機構 (JST) さきがけ研究員(兼任)

    2021年10月 - 現在

  2. 名古屋大学   大学院理学研究科   特任助教

    2019年4月 - 現在

  3. 千葉大学   大学院理学研究院   特任研究員

    2018年1月 - 2019年3月

  4. 千葉大学   共用機器センター   特任研究員

    2016年6月 - 2017年12月

  5. 千葉大学   大学院融合科学研究科   技術補佐員

    2016年4月 - 2016年5月

  6. 千葉大学   大学院融合科学研究科   CREST研究員

    2013年4月 - 2016年3月

  7. 千葉大学   大学院融合科学研究科   日本学術振興会特別研究員(RPD)

    2011年4月 - 2013年3月

  8. 名古屋大学   物質科学国際研究センター   日本学術振興会特別研究員(RPD)

    2010年4月 - 2011年3月

  9. 名古屋大学   物質科学国際研究センター   連携研究員

    2006年4月 - 2010年3月

  10. 東北大学   多元物質科学研究所   研究機関研究員(講師)

    2005年10月 - 2006年3月

  11. 独立行政法人理化学研究所   今久保独立主幹研究ユニット   研究員

    2002年10月 - 2005年9月

  12. 独立行政法人理化学研究所   フォトダイナミクス研究センター光反応チーム   フロンティア研究員

    2001年4月 - 2002年9月

  13. 日本学術振興会 特別研究員(DC2)

    1999年1月 - 2001年3月

▼全件表示

学歴 2

  1. 東北大学   大学院理学研究科   化学専攻

    1996年4月 - 2001年3月

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    国名: 日本国

  2. 東北大学   理学部   化学科

    1992年4月 - 1996年3月

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    国名: 日本国

所属学協会 4

  1. 分子科学会

  2. 応用物理学会

  3. 日本化学会

  4. 日本物理学会

受賞 1

  1. 黒田チカ賞

    1999年3月   青葉理学振興会  

    塩沢 理恵

 

論文 34

  1. Line graph theory reveals hidden spin frustration and bond frustration in molecular crystals with strong isotropy

    Suizu R., Awaga K.

    Journal of Materials Chemistry C   10 巻 ( 4 ) 頁: 1196 - 1203   2022年1月

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    記述言語:日本語   出版者・発行元:Journal of Materials Chemistry C  

    Graph theory has demonstrated that only three lattices, namely, honeycomb, K4, and diamond lattices, possess a strong isotropic property. It is also recognized that their line graphs correspond to kagome, hyper-kagome, and pyrochlore lattices, respectively, which are well known as spin frustration lattices. This relation suggests that the materials with the strong isotropic lattices possess "hidden"frustration. In this review article, after introducing the strong isotropy and the line graph transformation, we describe the spin frustration and formation of the spin liquid state in a honeycomb MOF, Cu3(HHTP), and in a molecule-based K4, (-)-NDI-Δ. We also report the unusual phase transitions in a molecule-based diamond, bpBDTDA, which are considered to result from bond frustration: specific periodical lattice distortions in the strong isotropic lattices are forbidden, in such a way that long-range antiferromagnetic orderings are forbidden in the spin frustration lattices.

    DOI: 10.1039/d1tc05161j

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  2. Exfoliation of Al-Residual Multilayer MXene Using Tetramethylammonium Bases for Conductive Film Applications.

    Saita E, Iwata M, Shibata Y, Matsunaga Y, Suizu R, Awaga K, Hirotani J, Omachi H

    Frontiers in chemistry   10 巻   頁: 841313   2022年

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    記述言語:英語   出版者・発行元:Frontiers in Chemistry  

    This study describes the concise exfoliation of multilayer Ti3C2Tx MXene containing residual aluminum atoms. Treatment with tetramethylammonium base in a co-solvent of tetrahydrofuran and H2O produced single-layer Ti3C2Tx, which was confirmed via atomic force microscopy observations, with an electrical conductivity 100+ times that of Ti3C2Tx prepared under previously reported conditions. The scanning electron microscopy and X-ray diffraction measurements showed that the exfoliated single-layer Ti3C2Tx MXenes were reconstructed to assembled large-domain layered films, enabling excellent macroscale electric conductivity. X-ray photoelectron spectroscopy confirmed the complete removal of residual Al atoms and the replacement of surface fluorine atoms with hydroxy groups. Using the exfoliated dispersion, a flexible transparent conductive film was formed and demonstrated in an electrical application.

    DOI: 10.3389/fchem.2022.841313

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  3. Stabilization of Interfacial Polarization and Induction of Polarization Hysteresis in Organic MISIM Devices. 査読有り

    Yokokura S, Tomimatsu A, Ishiguro J, Harada J, Takahashi H, Takahashi Y, Nakamura Y, Kishida H, Suizu R, Matsushita MM, Awaga K

    ACS applied materials & interfaces   13 巻 ( 27 ) 頁: 31928 - 31933   2021年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ACS Applied Materials and Interfaces  

    Molecule-based ferroelectrics has attracted much attention because of its advantages, such as flexibility, light weight, and low environmental load. In the present work, we examined an organic metal|insulator|semiconductor|insulator|metal (MISIM) device structure to stabilize the interfacial polarization in the S layer and to induce polarization hysteresis even without bulk ferroelectrics. The MISIM devices with I = parylene C and S = TMB (=3,3′,5,5′-tetramethylbenzidine)-TCNQ (=tetracyanoquinodimethane) exhibited hysteresis loops in the polarization-voltage (P-V) curves not only at room temperature but also over a wide temperature range down to 80 K. The presence of polarization hysteresis for MISIM devices was theoretically confirmed by an electrostatic model, which also explained the observed thickness dependence of the I layers on the P-V curves. Polarization hysteresis curves were also obtained in MISIM devices using typical organic semiconductors (ZnPc, C60, and TCNQ) as the S layer, demonstrating the versatility of the interfacial polarization mechanism.

    DOI: 10.1021/acsami.1c08417

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  4. Oxidative vaporization etching for molybdenum tip formation in air 査読有り

    Goto Y., Suizu R., Noguchi Y., Yamada T.K.

    Applied Surface Science   542 巻   頁: 148642 - 148642   2021年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Surface Science  

    Oxidative vaporization in air using a flame with a temperature range of 1950–2300 K was employed for controlling the tip shape made from a nipper-cut metal molybdenum (Mo) wire edge. An extremely high vapor pressure of MoO3 generated on the Mo surface in flame is a driving force behind the tip shape formation. Since the MoO3 vaporization rate follows the flame temperature gradient, we could control the tip apex shape by selecting the proper flame etching condition. The best condition to obtain a sharp tip apex based on statistical tests of dozens of Mo tips was obtained by Mo wire edge insertion into the 2100 K flame from the side for one second. This was repeated twice, which reproducibly provided a tip apex with a radius of 50–100 nm and a cone angle of 20–30 degrees. The present Mo tips, fabricated without aqueous solutions, were examined for their suitability as probe tips through air-scanning tunneling microscopy (STM), ultrahigh vacuum STM, field emission spectroscopy, and conductance measurements.

    DOI: 10.1016/j.apsusc.2020.148642

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  5. 3D supramolecular chiral crystal structures of radical anion salts of (−)-NDI-Δ and possible magnetic phase diagrams 査読有り

    Mizuno A., Shuku Y., Suizu R., Tsuchiizu M., Awaga K.

    CrystEngComm   23 巻 ( 29 ) 頁: 5053 - 5059   2021年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:CrystEngComm  

    Supramolecular chiral crystals of radical anion salts of a rigid triangular chiral electron acceptor, (−)-naphthalene diimide (NDI)-Δ, were electrochemically grown in propylene carbonate (PC) solutions of electrolytes (M·ClO4, M = K, Rb, Cs) in the presence of cyclic multidentate ligands, such as 18-crown-6, 15-crown-5, and 2,2,2-cryptand. The crystal structures were found to be formed by three-way branched π-π interactions between (−)-NDI-Δ radical anions, including [Rb(or K)(18-crown-6)]+complexes. The theoretical calculations on this structure revealed a possible magnetic phase diagram, which was governed by the ratio between two types of antiferromagnetic interactions.

    DOI: 10.1039/d1ce00628b

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  6. Variable Host-Guest Charge-Transfer Interactions in 1D Channels Formed in a Molecule-Based Honeycomb Lattice of Phenazine Analogue of Triptycene 査読有り

    Ushiroguchi R., Shuku Y., Suizu R., Awaga K.

    Crystal Growth and Design   20 巻 ( 12 ) 頁: 7593 - 7597   2020年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Crystal Growth and Design  

    We synthesized a phenazine analogue of triptycene acceptor, Trip-Phz, and found a honeycomb network of Trip-Phz with a wide 1D channel running through it. The interior surface of this channel was covered by the πelectrons of Trip-Phz. Even though there was no interaction between Trip-Phz and an organic donor, tetrathiafulvalene (TTF), in their solutions, the honeycomb crystals of Trip-Phz exhibited a host-guest charge-transfer (CT) interaction with TTF, specifically a reversible adsorption/desorption of TTF with the appearance/disappearance of a CT band.

    DOI: 10.1021/acs.cgd.0c01176

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  7. 分子性強等方性物質の合成とトポロジー物性の開拓 査読有り

    阿波賀邦夫, 水津理恵

    固体物理   55 巻 ( 9 ) 頁: 409 - 423   2020年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  8. ライングラフが解き明かす分子性K4およびDiamond格子の隠されたフラストレーション 査読有り

    水津理恵, 阿波賀邦夫

    Molecular Science   14 巻 ( 1 ) 頁: A0113 - A0113   2020年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:分子科学会  

    <p>In the graph theory, it is known that the line graphs of the <i>K</i><sub>4</sub> and diamond lattices are the hyper-kagome and pyrochlore lattices, respectively. The hyper-kagome and pyrochlore lattices are possible frustration lattices, because they consist of a triangular or tetrahedral component. In the present article, we describe the crystal structures and physical properties of a molecule-based <i>K</i><sub>4</sub>, (–)-NDI-Δ, and a molecule-based diamond, bpBDTDA. The line graph transformation reveals a spin frustration in (–)-NDI-Δ, which results in a spin liquid ground state, and a bond frustrations in bpBDTDA, which induces a stepwise and inhomogeneous lattice dimerization.</p>

    DOI: 10.3175/molsci.14.a0113

  9. Self-assembled honeycomb lattice in the monolayer of cyclic thiazyl diradical BDTDA (= 4,4'-bis(1,2,3,5-dithiadiazolyl)) on Cu(111) with a zero-bias tunneling spectra anomaly. 査読有り

    Yamamoto M, Suizu R, Dutta S, Mishra P, Nakayama T, Sakamoto K, Wakabayashi K, Uchihashi T, Awaga K

    Scientific reports   5 巻   頁: 18359   2015年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Scientific Reports  

    Scanning tunneling microscopy (STM) observation reveals that a cyclic thiazyl diradical, BDTDA (= 4,4′-bis(1,2,3,5-dithiadiazolyl)), forms a well-ordered monolayer honeycomb lattice consisting of paramagnetic corners with unpaired electrons on a clean Cu(111) surface. This BDTDA lattice is commensurate with the triangular lattice of Cu(111), with the former being 3 x 3 larger than the latter. The formation of the BDTDA monolayer structure, which is significantly different from its bulk form, is attributed to an interaction with the metal surface as well as the intermolecular assembling forces. STM spectroscopy measurements on the BDTDA molecules indicate the presence of a characteristic zero-bias anomaly centered at the Fermi energy. The origin of this zero-bias anomaly is discussed in terms of the Dirac cones inherent to the honeycomb structure.

    DOI: 10.1038/srep18359

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  10. Discovery of the K-4 Structure Formed by a Triangular pi Radical Anion 査読有り

    Mizuno Asato, Shuku Yoshiaki, Suizu Rie, Matsushita Michio M., Tsuchiizu Masahisa, Reta Maneru Daniel, Illas Francesc, Robert Vincent, Awaga Kunio

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   137 巻 ( 24 ) 頁: 7612 - 7615   2015年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of the American Chemical Society  

    The K4 structure was theoretically predicted for trivalent chemical species, such as sp2 carbon. However, since attempts to synthesize the K4 carbon have not succeeded, this allotrope has been regarded as a crystal form that might not exist in nature. In the present work, we carried out electrochemical crystallization of the radical anion salts of a triangular molecule, naphthalene diimide (NDI)-Δ, using various electrolytes. X-ray crystal analysis of the obtained crystals revealed the K4 structure, which was formed by the unique intermolecular π overlap directed toward three directions from the triangular-shape NDI-Δ radical anions. Electron paramagnetic resonance and static magnetic measurements confirmed the radical anion state of NDI-Δ and indicated an antiferromagnetic intermolecular interaction with the Weiss constant of θ = -10 K. The band structure calculation suggested characteristic features of the present material, such as a metallic ground state, Dirac cones, and flat bands.

    DOI: 10.1021/jacs.5b04180

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  11. Spatially inhomogeneous, stepwise phase transitions in a thiazyl diradical: a structural mismatch induced by lattice transformation 査読有り

    Suizu Rie, Iwasaki Akito, Shuku Yoshiaki, Awaga Kunio

    JOURNAL OF MATERIALS CHEMISTRY C   3 巻 ( 30 ) 頁: 7968 - 7977   2015年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Materials Chemistry C  

    A heterocyclic thiazyl diradical, bis(1,2,3,5-dithiadiazolyl)-4,4′-biphenylene (1), was synthesized, and its structural and thermodynamic properties were characterized. This compound exhibits unique spatially inhomogeneous, first-order phase transitions at 306 and 359 K, in a stepwise fashion. The unit cell in the high-temperature phase above 359 K consists of four regular π-stacking columns with the same stacking manners having a uniform interplanar distance d. These four columns are connected by intermolecular S⋯S and S⋯N contacts between the thiazyl radical moieties, but the molecular planes are shifted by a distance of d/4 due to a steric hindrance between the bulky biphenylene moieties. Below 359 K, three of the four stacking columns exhibit structural transitions toward zigzag chain structures, formed by an alternating dimerization between the radical moieties, while one column maintains the uniform π stacking. In the low-temperature phase below 306 K, the last column finally exhibits the radical dimerization toward a zigzag chain structure. These unique phase transitions in 1 can be understood in terms of the stepwise transitions from a "dimer liquid" to a "dimer solid" through a "dimer soliton phase".

    DOI: 10.1039/c5tc01410g

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  12. The key role of vibrational entropy in the phase transitions of dithiazolyl-based bistable magnetic materials 査読有り

    Vela Sergi, Mota Fernando, Deumal Merce, Suizu Rie, Shuku Yoshiaki, Mizuno Asato, Awaga Kunio, Shiga Motoyuki, Novoa Juan J., Ribas-Arino Jordi

    NATURE COMMUNICATIONS   5 巻   頁: 4411   2014年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Nature Communications  

    The neutral radical 1,3,5-trithia-2,4,6-triazapentalenyl (TTTA) is a prototype of molecule-based bistable materials. TTTA crystals undergo a first-order phase transition between their low-temperature diamagnetic and high-temperature paramagnetic phases, with a large hysteresis loop that encompasses room temperature. Here, based on ab initio molecular dynamics simulations and new X-ray measurements, we uncover that the regular stacking motif of the high-temperature polymorph is the result of a fast intra-stack pair-exchange dynamics, whereby TTTA radicals continually exchange the adjacent TTTA neighbour (upper or lower) with which they form an eclipsed dimer. Such unique dynamics, observed in the paramagnetic phase within the whole hysteresis loop, is the origin of a significant vibrational entropic gain in the low-temperature to high-temperature transition and thereby it plays a key role in driving the phase transition. This finding provides a new key concept that needs to be explored for the rational design of novel molecule-based bistable magnetic materials. © 2014 Macmillan Publishers Limited.

    DOI: 10.1038/ncomms5411

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  13. Third-Order Nonlinear Optical Properties and Electroabsorption Spectra of an Organic Biradical, [Naphtho[2,1-d:6,5-d ']bis([1,2,3]dithiazole)] 査読有り

    Takauji Keigo, Suizu Rie, Awaga Kunio, Kishida Hideo, Nakamura Arao

    JOURNAL OF PHYSICAL CHEMISTRY C   118 巻 ( 8 ) 頁: 4303 - 4308   2014年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Physical Chemistry C  

    Thin films of a thiazyl biradical, naphtho[2,1-d:6,5-d′]bis([1,2,3] dithiazole), abbreviated as NT, exhibit nonlinear optical properties with a large third-order nonlinear susceptibility of 2.1 × 10-11 esu. The electroabsorption and low-temperature-absorption measurements reveal a series of degenerate electronic states, which is probably caused by the biradical character of NT. It is concluded that this degeneracy should enhance the third-order nonlinear optical properties. © 2014 American Chemical Society.

    DOI: 10.1021/jp4093332

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  14. Electron-Transfer Processes in Highly-Correlated Electron Systems of Thiazyl Radicals 招待有り 査読有り

    Awaga Kunio, Nomura Kenji, Kishida Hideo, Fujita Wataru, Yoshikawa Hirofumi, Matsushita Michio M., Hu Laigui, Shuku Yoshiaki, Suizu Rie

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   87 巻 ( 2 ) 頁: 234 - 249   2014年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Bulletin of the Chemical Society of Japan  

    Heterocyclic thiazyl radicals possess unique chemical and physical properties as building blocks for molecule-based conductors and magnetic materials. They do not need protecting groups on their molecular skeletons, and the lack of such substituents permits close packing in the solid state. Moreover, thiazyl radical solids often involve a multidimensional network consisting of π-π overlaps and S⋯N contacts. The electronic structures of the thiazyl radicals can be compared to highly-correlated electron systems. In this account, we describe various electron-transfer processes in the solids of the thiazyl radicals, which manifest themselves by external stimuli such as temperature change, electric field, and photoillumination. © 2013 The Chemical Society of Japan.

    DOI: 10.1246/bcsj.20130248

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  15. Multidimensional Network Structures and Versatile Magnetic Properties of Intermolecular Compounds of a Radical Anion Ligand, [1,2,5]Thiadiazolo[3,4-f][1,10]phenanthroline 1,1-Dioxide 査読有り

    Shuku Yoshiaki, Suizu Rie, Domingo Alex, Calzado Carmen J., Robert Vincent, Awagat Kunio

    INORGANIC CHEMISTRY   52 巻 ( 17 ) 頁: 9921 - 9930   2013年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Inorganic Chemistry  

    The crystal structures and magnetic properties of seven kinds of [1,2,5]thiadiazolo[3,4-f][1,10]phenanthroline 1,1-dioxide (tdapO2) radical-anion salts, namely, K·tdapO2, K·tdapO 2·0.5MeCN, K·(tdapO2)2, Rb·(tdapO2)2, Cs7·(tdapO 2)6·ClO4, (NH4) 2·tdapO2·I, and Hppda·tdapO 2·MeCN, were investigated. Single-crystal X-ray analyses of these radical-anion salts revealed formation of π-stacking columns and the presence of intercolumnar coordination bonding or hydrogen bonding. The intermolecular magnetic coupling constants in these salts range from strong antiferromagnetic (J/kB = -310 K) to ferromagnetic (J/kB = 24 K). Ab initio calculations performed on the nearest-neighbor radical pairs in the π-stacking columns suggested that the magnetic interactions are strongly governed by the overlap between the two anionic radical species and well explain the observed ferromagnetic and antiferromagnetic interactions. In addition, calculations of a hypothetical oxygen-less tdap analogue suggested that the presence of oxygen in tdapO2 significantly reduces the hopping integral and enhances the probability of ferromagnetic interaction. © 2013 American Chemical Society.

    DOI: 10.1021/ic401078z

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  16. Electronic structure of organic biradical molecular films

    Kanai K., Koike H., Suizu R., Awaga K., Mase K., Kubo T.

    Journal of the Vacuum Society of Japan   56 巻 ( 1 ) 頁: 32 - 38   2013年3月

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    記述言語:日本語   出版者・発行元:Journal of the Vacuum Society of Japan  

    Most research in the fleld of organic electronics has focused on p-conjugated molecules with a closed-shell configuration, which accommodate their p-electrons in only bonding orbitals and are consequently quite stable. In general, closed-shell molecules have wide energy gaps, and they have significantly weaker intermolecular interactions. In contrast, recently organic biradicals have attracted considerable attention, owing to their interesting physical properties, e.g., a small energy gap and strong intermolecular interactions. Organic biradical molecules are composed of a pair of organic radicals that possess an open-shell configuration. Owing to their radical nature, biradical molecules exhibit unusual physical properties such as those listed above. This article is a review of our recent study on the electronic structure of two different types of organic biradical molecules that have potential as new materials for manufacturing electronic devices. In particular, our results show that organic biradicals are expected to form a new class of materials for use in organic electronics as new building blocks for highly ordered organic semiconducting films with wide energy band dispersion widths and a narrow energy gap.

    DOI: 10.3131/jvsj2.56.32

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  17. Monovalent and Mixed-Valent Potassium Salts of [1,2,5]Thiadiazolo[3,4-f][1,10]phenanthroline 1,1-Dioxide: A Radical Anion for Multidimensional Network Structures 査読有り

    Shuku Yoshiaki, Suizu Rie, Awaga Kunio

    INORGANIC CHEMISTRY   50 巻 ( 23 ) 頁: 11859 - 11861   2011年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Inorganic Chemistry  

    A novel phenanthlorine derivative, [1,2,5]thiadiazolo[3,4-f][1,10] phenanthroline 1,1-dioxide (tdapO2), was prepared to act as a radical-anion building block for coordination polymers. The crystal structures and magnetic properties of the monovalent and mixed-valent radical-anion salts K•tdapO2 and K•(tdapO2)2 were elucidated and confirm the possibility of tdapO2 to act as a bridging ligand and its capability to exhibit magnetic ordering at 15 K. © 2011 American Chemical Society.

    DOI: 10.1021/ic201966t

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  18. Effect of photoinduced charge displacement on organic optoelectronic conversion 査読有り

    Hu Laigui, Iwasaki Akito, Suizu Rie, Noda Yukiko, Li Bo, Yoshikawa Hirofumi, Matsushita Michio M., Awaga Kunio, Ito Hiroshi

    PHYSICAL REVIEW B   84 巻 ( 20 ) 頁: 205329   2011年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Physical Review B - Condensed Matter and Materials Physics  

    As a significant drawback to organic electronics, poor mobility in organic materials makes it difficult for carriers to make long trips across thin film devices. In the present work, we show that a short carrier trip or even charge displacement can contribute to the functioning of optoelectronics without being influenced by the poor carrier mobility. Our findings are based on analysis of the current-voltage and capacitance-voltage characteristics, as well as the anomalous transient photocurrent of the photocells of a radical material, 4′4-bis(1,2,3,5-dithiadiazolyl). This photoinduced transient current was successfully analyzed based on the total current equation and was interpreted in terms of the polarization current induced by charge displacement in the films. This mechanism provides preliminary information with respect to the development of methods for high-speed organic optoelectronic conversion. © 2011 American Physical Society.

    DOI: 10.1103/PhysRevB.84.205329

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  19. Highly efficient alternating photocurrent from interactive organic-radical dimers: A novel light-harvesting mechanism for optoelectronic conversion 査読有り

    Hu Laigui, Iwasaki Akito, Suizu Rie, Yoshikawa Hirofumi, Awaga Kunio, Ito Hiroshi

    CHEMICAL PHYSICS LETTERS   484 巻 ( 4-6 ) 頁: 177 - 180   2010年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemical Physics Letters  

    Thin films of interacting dimers of 4,4′-bis(1,2,3,5-dithiadiazolyl), sandwiched by ITO and Al, exhibit an anomalous transient current, due to a significant imbalance between the hole and electron mobilities and bulk polarization. We propose a new operational principle for organic optoelectronic conversion systems, which efficiently generates alternating photocurrent without being affected by the disadvantages of organic materials, such as poor mobility. © 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.cplett.2009.11.013

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  20. Interactive Radical Dimers in Photoconductive Organic Thin Films 査読有り

    Iwasaki Akito, Hu Laigui, Suizu Rie, Nomura Kenji, Yoshikawa Hirofumi, Awaga Kunio, Noda Yukiko, Kanai Kaname, Ouchi Yukio, Seki Kazuhiko, Ito Hiroshi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   48 巻 ( 22 ) 頁: 4022 - 4024   2009年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Angewandte Chemie - International Edition  

    Fully interactive: Overlap between extended unoccupied molecular orbitals leads to the high photoconductivity of interactive radical dimers. Sandwich-type cells (see picture; ITO=indium tin oxide) comprising highly oriented thin films of a disjoint diradical, 4,4′-bis(1,2,3,5-dithiadiazolyl) (BDTDA) exhibit a photocurrent with a high on/off ratio at reverse bias voltages and photovoltaic behavior at zero bias voltage. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.

    DOI: 10.1002/anie.200900472

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  21. Fe(II) spincrossover complex of [1,2,5]thiadiazolo[3,4-f][1,10]phenanthroline 査読有り

    Shuku Yoshiaki, Suizu Rie, Awaga Kunio, Sato Osamu

    CRYSTENGCOMM   11 巻 ( 10 ) 頁: 2065 - 2068   2009年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:CrystEngComm  

    We prepared an iron(II) spin crossover complex with a new ligand, [1,2,5]thiadiazolo[3,4-f][1,10]phenanthroline, which is a 1,10-phenanthroline analogue annulated with a thiadiazole moiety. X-Ray crystal analysis indicated a 3D network structure formed by short S⋯S contacts, and magnetic measurements revealed a broad transition above room temperature. © 2009 The Royal Society of Chemistry.

    DOI: 10.1039/b906845g

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  22. Electronic structure of disjoint diradical 4,4 '-bis(1,2,3,5-dithiadiazolyl) thin films 査読有り

    Kanai Kaname, Yoshida Hiroyuki, Noda Yukiko, Iwasaki Akito, Suizu Rie, Tsutumi Jun'ya, Imabayashi Hiroki, Ouchi Yukio, Sato Naoki, Seki Kazuhiko, Awaga Kunio

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   11 巻 ( 48 ) 頁: 11432 - 11436   2009年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Physical Chemistry Chemical Physics  

    The electronic structure of the thiazyl diradical, 4,4′-bis(1,2,3,5- dithiadiazolyl) (BDTDA), has been investigated by ultraviolet photoemission spectroscopy. Stacked BDTDA dimers showed an energy band dispersion of about 0.3 eV for the highest occupied molecular orbital in the direction of the surface normal of the BDTDA solid film. The π-orbital overlap between the stacked dimers therefore evolves into a quasi one-dimensional energy band along the dimer stacking direction. © 2009 the Owner Societies.

    DOI: 10.1039/b916396d

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  23. 30aYF-8 非線形伝導を示すNT_3GaCl_4における電流発振現象とEPR(30aYF θ-ET系等,電荷秩序,非線形伝導,領域7(分子性固体・有機導体))

    野村 賢司, 松下 朱知雄, 水津 理恵, 阿波賀 邦夫, 岸田 英夫

    日本物理学会講演概要集   64 巻 ( 0 )   2009年

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    記述言語:日本語   出版者・発行元:一般社団法人 日本物理学会  

    DOI: 10.11316/jpsgaiyo.64.1.4.0_855_1

  24. Molecular, crystal, and thin-film structures of octathio[8]circulene: Release of antiaromatic molecular distortion and lamellar structure of self-assembling thin films 査読有り

    Fujimoto Takuya, Suizu Rie, Yoshikawa Hirofumi, Awaga Kunio

    CHEMISTRY-A EUROPEAN JOURNAL   14 巻 ( 20 ) 頁: 6053 - 6056   2008年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemistry - A European Journal  

    Single crystals and thin films of the sunflower 2 was prepared by X-ray single-crystal analysis. Single crystals of the parent compound 1 were grown by slow evaporation of the Et2O solution at room temperature. Single crystals of 2 were obtained as red needles by vacuum sublimation, and X-ray crystal analysis was carried out at 173 K. The space group was found to be the monoclinic P21/n, while it was assigned to the non-centrosymmetric P21 in the Rietveld analysis. The symmetry, obtained in the present re-determination of the crystal structure of 2, reduced the size of the asymmetric unit to one-half molecule. The out-of-plane measurements indicate several diffraction peaks. Thin-film XRD indicated a lamellar structure in which the molecular planes are nearly perpendicular to the substrates.

    DOI: 10.1002/chem.200800519

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  25. Synthesis and characterization of heteroleptic iron(II) thiolate complexes with weak iron-arene interactions 招待有り 査読有り

    Ohta Shun, Ohki Yasuhiro, Ikagawa Yohei, Suizu Rie, Tatsumi Kazuyuki

    JOURNAL OF ORGANOMETALLIC CHEMISTRY   692 巻 ( 21 ) 頁: 4792 - 4799   2007年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.jorganchem.2007.06.027

    Web of Science

  26. Synthesis and structures of cyclic ethynylphosphine ligands 査読有り

    Shiozawa R, Sakamoto K

    CHEMISTRY LETTERS   32 巻 ( 11 ) 頁: 1024 - 1025   2003年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1246/cl.2003.1024

    Web of Science

  27. Synthesis and properties of hetero-halogenated TTFs 査読有り

    Suizu R, Imakubo T

    ORGANIC & BIOMOLECULAR CHEMISTRY   1 巻 ( 21 ) 頁: 3629 - 3631   2003年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/b310822h

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    PubMed

  28. Reaction of silylpentacarbonylmanganese with hydride-transfer reagents: reduction of carbonyl ligands accompanied with Si-C and C-C coupling

    Shiozawa R, Tobita H, Ogino H

    JOURNAL OF ORGANOMETALLIC CHEMISTRY   650 巻 ( 1-2 ) 頁: 91 - 95   2002年5月

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    記述言語:日本語  

    Web of Science

  29. Reaction of silylpentacarbonylmanganese with hydride-transfer reagents: reduction of carbonyl ligands accompanied with Si-C and C-C coupling 査読有り

    R Shiozawa, H Tobita, H Ogino

    JOURNAL OF ORGANOMETALLIC CHEMISTRY   650 巻 ( 1-2 ) 頁: 91 - 95   2002年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE SA  

    Treatment of Mn(CO)(5)SiTol(2)(p)H (2) with an excess of LiAlH4, NaBH4, or NaBH3(CN) in THF at room temperature gave hydrosilane H-SiTol(2)(p)H in high yield together with Mn-2(CO)(10). No reduction of CO ligands was observed. On the other hand, treatment of 2 with an excess of Red-Al (= Na[(CH3OCH3CH2O)(2)AlH2]) in toluene and subsequent addition of aqueous acidic solution afforded alkylsilanols (CH3)SiTol(2)(p)(OH) and (C2H5)SiTol(2)(p)(OH). Treatment of the reaction mixture of 2 and Red-Al with LiAlH4 in diethyl ether instead of hydrolysis gave alkylhydrosilanes (CH3)SiTol(2)(p)H and (C2H5)SiTol(2)(p)H. The methyl and ethyl groups on silicon originate from the CO ligands in 2. These products clearly demonstrate that not only the Si-C coupling, but also C-C coupling occurs efficiently in this reaction. (C) 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0022-328X(02)01188-9

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  30. Convenient preparation of Li[(eta(5)-C5Me5)M(CO)(2)] (M = Ru, Fe) by the reaction of (eta(5)-C5Me5)M(CO)(2)H with n-BuLi 査読有り

    M Okazaki, K Satoh, T Akagi, M Iwata, KA Jung, R Shiozawa, H Okada, K Ueno, H Tobita, H Ogino

    JOURNAL OF ORGANOMETALLIC CHEMISTRY   645 巻 ( 1-2 ) 頁: 201 - 205   2002年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE SA  

    The anionic ruthenium and iron complexes Li[(eta(5)-C5Me5)M(CO)(2)] (M = Ru (1-Ru), Fe (1-Fe)) were generated by deprotonation of the transition metal hydride (eta(5)-C5Me5)M(CO)(2)H with n-BuLi in tetrahydrofuran (THF). The reaction proceeded at -45 degreesC immediately. Reactions of 1 with various electrophiles (Me3SiCl, (p)Tol(2)HSiCl, Me2SiCl2, MeSiCl3, SiCl4, Me3SiSiMe2Cl, and Ph2GeCl2) afforded the corresponding nucleophilic substitution products (eta(5)-C5Me5)M(CO)(2)ER3 (E = Si, Ge) via salt-elimination. (C) 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0022-328X(01)01373-0

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  31. Novel reaction of silyl carbonyl complexes with hydride-transfer reagents: Reduction of a carbonyl ligand and coupling with a silyl group

    Shiozawa R, Tobita H, Ogino H

    ORGANOMETALLICS   17 巻 ( 16 ) 頁: 3497 - 3504   1998年8月

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    記述言語:日本語  

    Web of Science

  32. Novel reaction of silyl carbonyl complexes with hydride-transfer reagents: Reduction of a carbonyl ligand and coupling with a silyl group 査読有り

    R Shiozawa, H Tobita, H Ogino

    ORGANOMETALLICS   17 巻 ( 16 ) 頁: 3497 - 3504   1998年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    Treatment of CpFe(CO)(2)SiR3 (Cp = eta(5)-C5H5; R-3 = (p)Tol(2)Cl, (p)Tol(2)H, (p)Tol(2)Me, MePh (1-Nap), and (n-C5H11)(2)H; 1-Nap = 1-naphthyl) with LiAlH4 in ether or THF at room temperature gave CH3SiR3 as the major product in moderate to high yield together with HSiR3. Reaction of CpFe(CO)(2)SiMes(2)H with LiAlH4 afforded only H(2)SiMes(2). Labeling experiments using LiAlD4 gave the deuterated methylsilanes. These results proved that the hydrogen source for the methyl group is LiAlH4. Furthermore, the reduction of CpFe(*CO)(2)Si(p)Tol(2)R' (*C = C-13 enriched; R' = H,Me) produced *CH(3)Si(p)Tol(2)R' where the methyl group introduced on Si was C-13-enriched. These experimental results suggested that the carbonyl ligand was reduced by LiAlH4 and coupled with the silyl group to give the methylsilane. Cp*Fe(CO)(2)Si(p)Tol(2)H (Cp* = eta(5)-C5Me5), having a Cp* ligand which is bulkier and more electron-donating than a Cp ligand, did not react with LiAlH4 at room temperature, but it did so at 50 degrees C to give CH(3)Si(p)Tol(2)H and HSi(p)Tol(2)H, probably because nucleophilic attack of LiAlH4 at a carbonyl ligand was retarded both sterically and electronically by the Cp* ligand. When the :reactions were performed in sealed NMR tubes and monitored by NMR spectroscopy, the signals due to the anionic complexes Li+[CpFe(CO)(CH3)Si(p)Tol(2)R'](-) were observed in addition to those of silane products. These anionic complexes are considered not to be intermediates but to be byproducts because the anionic complexes did not change to methylsilanes on heating. The anionic complexes reacted with MeOH and Mel to give hydrosilanes HSi(p)Tol(2)R' and methylsilanes CH(3)Si(p)Tol(2)R', respectively.

    DOI: 10.1021/om9802111

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  33. Reaction of silyl(carbonyl)iron complexes with LiAlH4 giving methylsilanes: Reduction of a carbonyl ligand and coupling with a silyl group 査読有り

    H Tobita, R Shiozawa, H Ogino

    CHEMISTRY LETTERS   ( 8 ) 頁: 805 - 806   1997年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:CHEMICAL SOC JAPAN  

    Treatment of CpFe(CO)(2)SiR3 (R-3 = (pTol)(2)H, ((p)Tol)(2)Me, MePh(1-Nap); 1-Nap = 1-naphthyl) with LiAlH4 in ether or THF at room temperature gave CH3SiR3 as a major product in moderate to high yield. The labeling experiments using LiAlD4 and CpFe((CO)-C-13)(2)SiR(pTol)(2) (R = H, Me) proved unambiguously that the carbonyl ligand is reduced with LiAlH4 and coupled with the silyl group to give the methylsilane.

    DOI: 10.1246/cl.1997.805

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  34. Reaction of silyl(carbonyl)iron complexes with LiAlH4 giving methylsilanes: Reduction of a carbonyl ligand and coupling with a silyl group

    Tobita H, Shiozawa R, Ogino H

    CHEMISTRY LETTERS   ( 8 ) 頁: 805 - 806   1997年

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    記述言語:日本語  

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書籍等出版物 1

  1. ヨウ素化合物の機能と応用

    今久保達郎, 白旗崇, 水津理恵( 担当: 分担執筆 ,  範囲: 6.1章 ヨウ素と有機伝導体)

    シーエムシー出版  2005年 

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    担当ページ:193-206   記述言語:日本語 著書種別:学術書

MISC 9

  1. ハニカムネットワークを有するBDTDA単層膜の低速電子線回折による構造解析

    水津理恵, 水津理恵, 花本大智, 山本真幸, 白澤徹郎, 坂本一之  

    分子科学討論会講演プログラム&amp;要旨(Web)11th 巻   頁: ROMBUNNO.2C09 (WEB ONLY)   2017年

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    記述言語:日本語  

    J-GLOBAL

  2. 光電変換デバイスセルにおける環状チアジルバイラジカルBDTDAの電子構造と分子配向

    水津理恵, 森岡健太, 阿波賀邦夫, 坂本一之  

    日本化学会講演予稿集94th 巻 ( 2 ) 頁: 261   2014年3月

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    記述言語:日本語  

    J-GLOBAL

  3. 環状チアジルラジカル分子の扱着によるAg薄膜の量子井戸準位の変調

    林田崇志, 水津理恵, 珠玖良昭, 阿波賀邦夫, 坂本一之  

    日本物理学会講演概要集68 巻 ( 2 ) 頁: 811   2013年8月

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    記述言語:日本語  

    J-GLOBAL

  4. 実デバイス環状チアジルラジカル分子薄膜の電子構造

    森岡健太, 水津理恵, 阿波賀邦夫, 坂本一之  

    日本物理学会講演概要集68 巻 ( 2 ) 頁: 803   2013年8月

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    記述言語:日本語  

    J-GLOBAL

  5. ハニカム格子状に配列したラジカル分子BDTDA単層膜のSTM/S観察

    山本真幸, 水津理恵, MISHRA P, DUTTA S, 吉澤俊介, 坂本一之, 阿波賀邦夫, 中山知信, 若林克法, 内橋隆  

    日本物理学会講演概要集68 巻 ( 1 ) 頁: 926   2013年3月

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    記述言語:日本語  

    J-GLOBAL

  6. 環状チアジルバイラジカルBDTDA薄膜の電子構造

    水津理恵, 森岡健太, 阿波賀邦夫, 坂本一之  

    分子科学討論会講演プログラム&amp;要旨(Web)7th 巻   頁: ROMBUNNO.3P045 (WEB ONLY)   2013年

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    記述言語:日本語  

    J-GLOBAL

  7. 有機ビラジカル分子薄膜の電子構造

    金井要, 古池晴信, 水津理恵, 阿波賀邦夫, 間瀬一彦, 久保孝史  

    J. Vac. Soc. Jpn56 巻   頁: 32 - 38   2013年

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    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

  8. 27pPSA-17 環状チアジルラジカル分子の吸着によるAg薄膜の量子井戸準位の変調(領域9ポスターセッション,領域9(表面・界面,結晶成長))

    林田 崇志, 水津 理恵, 珠玖 良昭, 阿波賀 邦夫, 坂本 一之  

    日本物理学会講演概要集68 巻 ( 0 )   2013年

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    記述言語:日本語   出版者・発行元:一般社団法人 日本物理学会  

  9. Cu(111)上に作製した環状チアジルラジカルBDTDA超薄膜の構造と電子状態

    山本真幸, 水津理恵, MISHRA P, 中山知信, 阿波賀邦夫, 坂本一之, 内橋隆  

    日本物理学会講演概要集67 巻 ( 2 ) 頁: 816   2012年8月

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    記述言語:日本語  

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科研費 3

  1. 強相関ラジカル分子2次元ネットワークの物性探索と制御

    研究課題/研究課題番号:20H02707  2020年4月 - 2023年3月

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    水津 理恵

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    担当区分:研究代表者 

    配分額:18200000円 ( 直接経費:14000000円 、 間接経費:4200000円 )

    本研究では、分子間に強い相互作用をもつ『強相関ラジカル分子』を用いて基板上に『自己集積二次元ネットワーク』を作製し、その物性の探索と制御を行う。構成ユニットをラジカル分子にすることで、電子対形成の安定化を受けていない不対電子が機能発現の源となる。また静電的相互作用や不対電子間の磁気的交換相互作用などの分子間相互作用に加えて、分子‐基板相互作用を組み合わせることで、バルク結晶では実現できない二次元ネットワークの作製を目指す。その二次元ネットワーク特有の電子構造に由来した新奇物性を探索し、さらに大きな空孔を利用した電気化学的な手法を用いたバンドフィリング制御による電子物性の制御方法を確立する。

  2. 有機ラジカル光エレクトロニクスの開拓

    研究課題/研究課題番号:10J40164  2010年4月 - 2012年3月

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

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    担当区分:研究代表者 

    配分額:3100000円 ( 直接経費:3100000円 )

    本研究では、開殻系分子を用いた有機光エレクトロニクスの開拓を行うため、環状チアジルバイラジカルの光物性を調べ、その機構解明および特性の向上を目指すことを目的としている。以前より巨大過渡光電流が知られていたBDTDAと呼ばれる分子およびその誘導体についての研究から、巨大過渡光電流の発現には分極に助けられる界面電荷分離が必要という結論に至り、膜厚依存光電子分光測定を行うことにより、界面付近における電子状態の解明を行った。昨年度、GeS(001)上のBDTDAの入射光エネルギー依存UPSおよび角度分解UPSを測定することにより、非常に大きなバンド分散(~0.3eV)があることが確認している。そこで今回は実際にデバイスで用いられている基板上のBDTDA薄膜のバンド分散を調べるために、高エネルギー加速器研究機構Photon Factory BL-13AにてITOおよびSiO_2基板上のBDTDA薄膜の紫外光電子分光(UPS)および吸収端近傍X線吸収微細構造(NEXAFS)を測定し、BDTDA薄膜の電子状態を詳細に調べた。
    入射光エネルギー依存UPSではout-of-plane方向のバンド分散がわかる。ITOおよびSiO_2基板いずれにおいてもGeS(001)で観測されたような大きな分散は見られず、分散幅は~50meV程度であった。NEXAFS測定により分子の配向性を調べたところ、ITOおよびSiO_2基板いずれにおいても、基板に対して分子面が30。程度傾いていることがわかった。そのため積層方向の重なりが小さくなり、バンド分散が小さくなったと考えられる。このことから実際のデバイスにおいてはホッピング伝導が支配的であると言える。この結果はBDTDA薄膜の定常電流が過渡電流に対して非常に小さいことと矛盾しない。以上のことから、BDTDA薄膜の大部分は伝導に寄与せず、大きな分極を起こす役割をしていると推測される。

  3. 遷移金属錯体を用いた新規なケイ素-炭素結合形成反応の研究

    研究課題/研究課題番号:99J01418  1999年1月 - 2001年3月

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    塩沢 理恵

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    担当区分:研究代表者 

    配分額:1800000円 ( 直接経費:1800000円 )