Control of intermolecular interaction to aim for new functionality

2010 Fiscal Year Self-evaluation Report

• Project Area: New Frontier in Materials Science Opened by Molecular Degrees of Freedom
• Project/Area Number: 20110007
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: The University of Tokyo
• Principal Investigator: MORI Hatsumi The University of Tokyo, 物性研究所, 教授 (00334342)
• Project Period (FY): 2008-11-13 – 2013-03-31
• Keywords: 分子性物質 / 分子の自由度 / 外場応答 / 新物質開拓

Research Abstract

本研究の目的は、多様な分子の自由度を利用して、分子間相互作用の制御を行い、外場応答により動的な新電子機能を示す分子性物質を開拓することである。特に本課題では分子間相互作用自由度開拓に重点を置いた分子性物質開発を行う。具体的には、以下である。
(1)ドナー分子に多様な立体配座を導入し、π電子系を拡大・縮小して、分子間の距離、二量化の程度を系統的に変化させ、結晶中の電子相関を制御し、反強磁性相、電荷秩序相、超伝導相、金属相、誘電相と複数の相が競合し、電場、磁場、温度、圧力、光などの外場応答により、超伝導、非線形伝導、巨大磁気抵抗、強誘電性、強磁性など、興味深い静的・動的機能性を発現する分子性物質を開拓する。
(2)多様な機能性を有する有機配位子を開発し、伝導性、誘電性、磁性を担う有機配位子サイトと、d、f電子により磁性を担う金属イオンサイトの相互作用を構造的に制御して、新しい多重機能性分子性金属錯体を開拓する。
(3)さらに、特徴的なことは物性理論家が加わり、この計画研究で開発した分子性物質における超伝導、電荷秩序、モット転移、熱電効果などの物性を理論的に調べ、そこで得られた知見を物質合成にフィードバックして、より興味深い物質開拓への道を切り開く。

Research Products

• [Journal Article] Metallic Behavior Achieved by a Supramolecular Copper Complex with a Coordination of Oxidized Pyrazino-Fused Donors and Mixed Halide Anions as Ligands, [Cu(I)Cl_<0.2>Br_<1.3>(pyra-TTF)^<0.5+>] (2010)
  • Author(s): S.Ichikawa, K.Takahashi, H.Mori, M.Matsuda, H.Tajima
  • Journal Title: J.Mater.Chem. 20(45) Pages: 10130-10134
  • Peer Reviewed
• [Journal Article] A Pure Organic Paramagnetic Metal, κ-β"-(BEDT-TTF)2(PO-CONHC2H4SO3), Where PO = 2, 2, 5, 5-Tetramethy l-3-pyrrolin-1-oxyl Free Radical (2010)
  • Author(s): H.Akutsu, S.Yamashita, J.Yamada, S.Nakatsuji, Y.Hosokoshi, S.S.Turner
  • Journal Title: Chem.Mater.(Special Issue onπ-Functional Materials) 23 Pages: 762-764
  • Peer Reviewed
• [Journal Article] Superconductivity Competitive with Checkerboard-type Charge Ordering in Organic Conductor beta-(meso-DMBEDTTTF) 2PF6 (2009)
  • Author(s): N.Morinaka, K.Takahashi, R.Chiba, F.Yoshikane, S.Niizeki, M.Tanaka, K.Yakushi, M.Koeda, M.Hedo, T.Fujiwara, Y.Uwatoko, Y.Nishio, K.Kajita, H.Mori
  • Journal Title: Phys.Rev.B 80 Pages: 092508-1-092508-4)
  • Peer Reviewed
• [Journal Article] Synthesis and physical properties of a new single-component molecular conductor [Au(dhdt)2] (2009)
  • Author(s): H.Nishikawa, W.Yasuoka, K.Sakairi, H.Oshio
  • Journal Title: Polyhedron 28 Pages: 1634-1637
  • Peer Reviewed
• [Journal Article] Pairing Competition in a Quasi-One-Dimensional Model of Organic Superconductors (TMTSF)2X in Magnetic Field (2009)
  • Author(s): H.Aizawa, K.Kuroki, Y.Tanaka
  • Journal Title: J.Phys.Soc.Jpn. 78 Pages: 124711-1-124711-10
  • Peer Reviewed
• [Presentation] Electric and Magnetic Field Responses of Charge ordered Molecular Materials (2010)
  • Author(s): H.Mori
  • Organizer: International Conference on Science and Technology of Synthetic Metals 2010 (ICSM2010)
  • Place of Presentation: Kyoto International Conference Center (Kyoto)
  • Year and Date: 20100704-20100709
• [Presentation] Development of Bistable Molecular Materials Based on a Spin Crossover Phenomenon (2010)
  • Author(s): K.Takahashi
  • Organizer: International Conference on Science and Technology of Synthetic Metals 2010 (ICSM2010)
  • Place of Presentation: Kyoto International Conference Center (Kyoto)
  • Year and Date: 20100704-20100709
• [Presentation] Structural and Physical Properties of Molecular Conductors Derived from Stereoisomers of DMDH-TTP (2010)
  • Author(s): J.Yamada
  • Organizer: International Conference on Science and Technology of Synthetic Metals 2010 (ICSM2010)
  • Place of Presentation: Kyoto International Conference Center (Kyoto)
  • Year and Date: 20100704-20100709
• [Presentation] 有機超伝導体の理論 (2010)
  • Author(s): 黒木和彦
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-25
• [Presentation] Electrical and magnetic properties of new TTF-based metal complexes (2010)
  • Author(s): H.Nishikawa
  • Organizer: ISSP-MDF Joint International Workshop-Spin-related Phenomena in Organic Materials-
  • Place of Presentation: ISSP (Kashiwa)
  • Year and Date: 2010-07-02
• [Book] 超伝導ハンドブック(2.1.3分子性結晶-電荷秩序系) (2009)
  • Author(s): 森初果
  • Total Pages: 39-44
  • Publisher: 朝倉書店
• [Book] Introduction to Organic Electronicand Optoelectronic Materials and Devices CRC Press (2008)
  • Author(s): H.Mori
  • Total Pages: 263-287
  • Publisher: Taylor and Francis Group