• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2009 Fiscal Year Annual Research Report

スピン・電荷・格子結合に基づく一次元金属錯体の臨界相制御とダイナミクス創出

Research Project

Project/Area Number 21750053
Research InstitutionTohoku University

Principal Investigator

高石 慎也  Tohoku University, 大学院・理学研究科, 助教 (10396418)

Keywords一次元錯体 / 相転移 / Peierls絶縁体 / Mott絶縁体 / Pd(III) / 混合原子価 / 平均原子価 / 光誘起相転移
Research Abstract

擬一次元ハロゲン架橋錯体は大きな電荷移動吸収、高次の共鳴ラマン散乱、大きなStokesシフトを伴う発光、非常に大きな三次非線形光学応答、solitonやpolaronに由来するmid-gap吸収など非常に興味深い物性を示すことから非常に興味深い化合物群である。これらの錯体は、現在までに300種類以上の化合物が合成されているが、例外なく、Ni錯体はNi^<III>のMott-Hubbard(MH)状態、Pd錯体はPd^<II>-Pd^<IV>の電荷密度波(CDW)状態をとる。われわれは、長鎖アルキル基をカウンターイオンに導入したPd錯体[Pd(en)_2Br](C_n-Y)_2・H_2O(C_n-Y=dialkylsulfosuccinate)をすることにより、世界で初めてPd-Br錯体において、Pd(III)のMH状態を実現する二とに成功し、さらには、CDW-MH相転移を観測することに成功した。さらに、n=5の化合物において、誘電率の測定を行ったところ、相転移温度(Tc=205K)付近において非常に大きい比誘電率(約5000)を観測した。この値は、セラミックコンデンサに用いられているチタン酸バリウムのそれに匹敵する大きさである。また、より低温領域において、周波数依存する緩和型の誘電応答が観測され、何らかの遅いダイナミクスの存在が示唆された。
また、この錯体において、CDWからMHへの光誘起相転移、および、MHからCDWへの光誘起相転移という双方向の光誘起相転移を初めて実現した。

  • Research Products

    (14 results)

All 2010 2009

All Journal Article (11 results) (of which Peer Reviewed: 11 results) Presentation (3 results)

  • [Journal Article] Direct Synthesis and Crystal Structure of Dehydrated State in Vapochromic MMX-type Quasi-One-Dimensional Iodide-Bridged Platinum Complexes2009

    • Author(s)
      Hiroaki Iguchi, Shinya Takaishi, Takashi Kajiwara, Hitoshi Miyasaka, Masahiro Yamashita, Hiroyuki Matsuzaki, Hiroshi Okamoto
    • Journal Title

      Inorg.Organomet.Polym. 19

      Pages: 85-90

    • Peer Reviewed
  • [Journal Article] Current oscillation originating from negative differential resistance in one-dimensional halogen-bridged nickel compounds2009

    • Author(s)
      Hideo Kishida, Takafumi Ito, Arao Nakamura, Shinya Takaishi, Masahiro Yamashita
    • Journal Title

      J.Appl.Phys. 15

      Pages: 7446-7451

    • Peer Reviewed
  • [Journal Article] Low-Temperature Scanning Tunneling Microscopy Investigation of Bis(phthalocyaninato)yttrium Growth on Au(111): From Individual Molecules to Two-Dimensional Domains2009

    • Author(s)
      Yan Feng Zhang, Hironari Isshiki, Keiichi Katoh, Yusuke Yoshida, Masahiro Yamashita, Hitoshi Miyasaka, Brian K.Breedlove, Takashi Kajiwara, Shinya Takaishi, Tadahiro Komeda
    • Journal Title

      J.Phys.Chem.C 113

      Pages: 9826-9830

    • Peer Reviewed
  • [Journal Article] Structural correlations between the crystal field and magnetic anisotropy of Ln-Cu single-molecule magnets2009

    • Author(s)
      Takashi Kajiwara, Kohiei Takahashi, Hiraizumi Tomonari, Shinya Takaishi, Masahiro Yamashita
    • Journal Title

      CrystEngComm 11

      Pages: 2110-2116

    • Peer Reviewed
  • [Journal Article] Coordination enhancement of singl-molecule magnet behavior of Tb(III)-Cu(II)dinuclear systems2009

    • Author(s)
      Takashi Kajiwara, Kohei Takahashi, Tomonari Hiraizumi, Shinya Takaishi, Masahiro Yamashita
    • Journal Title

      Polyhedron 28

      Pages: 1860-1863

    • Peer Reviewed
  • [Journal Article] Ultrafast photoinduced transitions in charge density wave, Mott insulator, and metallic phases of an iodine-bridged platinum compound2009

    • Author(s)
      K.Kimura, Hiroyuki Matsuzaki, Shinya Takaishi, Masahiro Yamashita, Hiroshi Okamoto
    • Journal Title

      Physical Review B 79

      Pages: 075116:1-5

    • Peer Reviewed
  • [Journal Article] Ultrafast optical responses in one-dimensional Mott insulators of halogen-bridged Ni compounds2009

    • Author(s)
      Shoichi Tao, Tatuo Miyagoe, Hiroyuki Matsuzaki, Hideki Ohtsu, Miki Hasegawa, Shinya Takaishi, Masahiro Yamashita, Hiroshi Okamoto
    • Journal Title

      Journal of Physics : Conference Series 148

      Pages: 012011:1-3

    • Peer Reviewed
  • [Journal Article] Electroconductive porous Coordination Polymer Cu[Cu(pdt)_2]Composed of Donor and Acceptor Building Units2009

    • Author(s)
      Shinya Takaishi, Miyuki Hosoda, Takashi, Kajiwara, Hitoshi Miyasaka, Masahiro Yamashita, Yasuyuki Nakanishi, Yasutaka Kitagawa, Kizashi Yamaguchi, Atsushi Kobayashi, Hiroshi Kitagawa
    • Journal Title

      Inorg.Chem. 48

      Pages: 9048-9050

    • Peer Reviewed
  • [Journal Article] Direct Observation of Lanthanide(III)-Phthalocyanine Molecules on A u(111)by Using Scanning Tunneling Microscopy and Scanning Tunneling Spectroscopy and Thin-Film-Field-Effect Transistor Properties of Tb(III)and Dy(III)-Phthalocyanine Molecules2009

    • Author(s)
      Keiichi Katoh, Yusuke Yoshida, Masahiro Yusuke, Hitoshi Miyasaka, Brian K.Breedlove, Takashi Kajiwara, Shinya Takashi, Naoto Ishikawa, Hironari Isshiki, Yanfeng Zhang, Tadahiro Komeda, Masakazu Yamagishi, Jun Takeya
    • Journal Title

      J.Am.Chem.Soc. 131

      Pages: 9967-9976

    • Peer Reviewed
  • [Journal Article] Effect of an In-Plane Ligand on the Electronic Structures of Bromo-Bridged Nano-Wire Ni-Pd Mixed-Metal Complexes, [Ni_<1-x>Pd_x(bn)_2Br]Br_2(bn=2S, 3S-diaminobutane)2009

    • Author(s)
      Mari Sasaki, Hashen Wu, Daisuke Kawakami, Shinya Takaishi, Takashi Kajiwara, Hitoshi Miyasaka, Brian K.Breedlove, Masahiro Yamashita, Hideo Kishida, Hiroyuki Matsuzaki, Hiroshi Okamoto, Hisaaki Tanaka, Shi-ichi Kuroda
    • Journal Title

      Inorg.Chem. 48

      Pages: 7446-7451

    • Peer Reviewed
  • [Journal Article] Observation of the Properties of a Single Unit of a Limited CDW Structure in a Pt-II/Pt-IV Host-Guest Binary System Based on a Square-Shaped Complex2009

    • Author(s)
      Ed Hirahara, Shinya Takaishi, Masahiro Yamashita
    • Journal Title

      Chem.Asian J. 4

      Pages: 1442-1450

    • Peer Reviewed
  • [Presentation] 電荷の双安定性を利用した配位高分子の機能化2010

    • Author(s)
      高石慎也
    • Organizer
      日本化学会春季年会シンポジウム
    • Place of Presentation
      近畿大学
    • Year and Date
      2010-03-26
  • [Presentation] CHEMICAL AND PHYSICAL PROPERTIES OF CONDUCTIVE METAL-ORGANIC FRAMEWORK, Cu[Cu(pdt)_2]2009

    • Author(s)
      高石慎也・細田深雪・山下正廣
    • Organizer
      第2回アジア錯体化学会議(ACCC2009)
    • Place of Presentation
      南京(中国)
    • Year and Date
      2009-11-02
  • [Presentation] 酸化状態の双安定性を利用した配位高分子の機能化2009

    • Author(s)
      高石慎也
    • Organizer
      化学系学協会東北大会
    • Place of Presentation
      日本大学郡山キャンパス
    • Year and Date
      2009-09-20

URL: 

Published: 2011-06-16   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi