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スピン・電荷・格子結合を有する金属ダイマー系の創製と磁場による軌道秩序形成

Research Project

Project/Area Number 14038208
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionUniversity of Tsukuba

Principal Investigator

北川 宏  筑波大学, 化学系, 助教授 (90234244)

Co-Investigator(Kenkyū-buntansha) 三谷 忠興  北陸先端科学技術大学, 材料科学研究科, 教授 (50010939)
Project Period (FY) 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2002: ¥2,200,000 (Direct Cost: ¥2,200,000)
Keywordsスピン・電荷・軌道結合 / 電荷整列 / 磁場誘起現象 / 一次元電子系 / 混合原子価錯体
Research Abstract

物質群の幅を広げて系統的に研究を進めるために、ダイマーをユニットとした以下の物質開発及び単結晶育成を行った。
(1)電解合成により、ダイレクトチェイン構造を有する(架橋配位子の無い)物質系の開発
(2)価数揺動制御のため二種類の二座配位子を用いた系の構築
基礎光学定数を求めるため、単結晶を用いて、赤外から可視紫外域にいたる偏光顕微反射スペクトルを顕微用クライオスタットにより4.2Kまでの光学スペクトルの温度依存性を調べた。さらにNi_2(dta)_4lにおける磁場誘起相転移現象の解明すべく、研究者が併任する北陸先端科技大の磁場システム(12T,1.8-300K)を用いて、強磁場下における光磁気特性を調べ、スピンとの結合状態についての詳細な知見を得た。単結晶試料において、室温から極低温までの電気伝導度・ゼーベック係数・ホール効果・磁気抵抗・比熱等の実験を行ない、キャリヤーの種類・濃度、伝導電子の散乱機構等の輸送現象について明らかにした。遍歴磁性等の磁気的相互作用の発現が期待される系や磁場誘起効果が観られるNi_2(dta)_4lにおいては、ESR・SQUID・NMRの測定を行った。電荷秩序転移の際には電荷の偏りがダイマー内で生じることから、誘電率に異常が現れることが期待され、LCRメータを用いて磁場下の誘電率の温度依存性の測定を行った。

Report

(1 results)
  • 2002 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Y.Miyazaki, Qi Wang, A.Sato, K.Saito, M.Yamamoto, H.Kitagawa, T.Mitani, M.Sorai: "Heat Capacity of the Halogen-Bridged Mixed-Valence Complex Pt_2(dta)_4I(dta=CH_3CS_2)"J. Phys. Chem. B. 106. 197-202 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Mitsumi, S.Umebayashi, Y.Ozawa, K.Toriumi, H.Kitagawa, T.Mitani: "Structural Phase Transition and Valence Fluctuation Observed in a New MMX Chain Compound, Pt_2(n-PrCS_2)_4I"Chemistry Letters. 258-259 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Nagao, M.Fujishima, R.Ikeda, S.Kanda, H.Kitagawa: "Highly Proton-Conductive Copper Coordination Polymers"Synthetic Metals. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Fujishima, Y.Nagano, R.Ikeda, S.kanda, H.Kitagawa: "Substituent Effect on the Magnetic Properties of Copper Coordination Polymers with Dithiooxamide and N,N'-bis-(hydroxyethyl)dithiooxamide"Synthetic Metals. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Ohmoto, S.Maki, Y.Morita, T.Kubo, H.Kitagawa, T.Okubo, T.Mitani, K.Nakasuji: "Complem entary Double Hydrogen-Bonded CT Complexes of TTF Having Uracil Moiety"Synthetic Metals. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Fujishima, R.Ikeda, S.Kanda, H.Kitagawa: "Electronic State of A Hydrogen-Doped Copper Coordination Polymer : catena-μ-N,N'-bis-(hydroxyethyl)dithiooxamidatocopper(II), (HOC_2H_4)_2dtoaCu"Mol. Cryst. Liq. Cryst.. 379. 223-228 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Nagao, R.Ikeda, S.Kanda, H.Kitagawa: "Complex-Plane Impedance Study on A Hydrogen-Doped Copper Coordindination Polymer : N,N'-bis-(2-hydroxy ethyl)dithiooxamidatocopper(II)"Mol. Cryst. Liq. Cryst.. 379. 89-94 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Kobayashi, H.Kitagawa, R.Ikeda: "Structural and Optical Properties of Pt_2(dtp)_4Br_2(dtp=dithiopropionato)and Its Halogen-Replacement Effect"Mol. Cryst. Liq. Cryst.. 379. 315-320 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Takaishi, H.Kitagawa, R.Ikeda: "Relaxation Process of CT Exciton State in a One-Dimensional MX-Chain Compound[NiBr(chxn)_2]Br_2"Mol. Cryst. Liq. Cryst.. 379. 279-284 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] R.Makiura, H.Kitagawa, R.Ikeda: "Electronic State of A Hydrogen-Bridged Mixed-Valence Binuclear Complex, Ni_2(dta)_4I"Mol. Cryst. Liq. Cryst.. 379. 309-314 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Mitsumi, K.Kitamura, A.Morinaga, Y.Ozawa, M.Kobayashi, K.Toriumi, Y.Iso, H.Kitagawa, T.Mitani: "Novel Valence-Ordering Structures and Magnetic behavior of New Metallic MMX Chain Compounds"Angrew. Chem. Int. Ed.. 41. 2767-2771 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Morita, S.Maki, M.Ohmoto, H.Kitagawa, T.Okubo, T.Mitani, K.Nakasuji: "Hydrogen-Bonded Charge-Transfer Complexes of TTF Containing a Uracil Moiety : Crystal Structures and Electronic Properties of the Hydrogen Cyananilate and TCNQ Complexes"Organic Letters. 4. 2185-2188 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] G.Saito, H.Sasaki, T.Aoki, Y.Yoshida, A.Otsuka, H.Yamochi, O.Drozdova, K.Yakushi, H.Kitagawa: "Complex Formation of Ethylenedioxyethylenedithiotetrathiafulvalene(EDOEDT-TTF : EOET) and its self-assembling ability"J. Mater. Chem.. 12. 1640-1649 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Takaishi, M.Kano, H.Kitagawa, Y.Furukawa, K.Kumagai, R.Ikeda: "Spin Structure and Dynnamics in a Spin 1/2 One Dimensional Antiferromagnet, [NiBr(chxn)_2]Br_2"Chem. Lett.. 856-857 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Kitagawa, Y.Nagano, M.Fujishima, R.Ikeda, S.Kanda: "Highly Proton-Conductive Copper Coordination Polymer, H_2dtoaCu"Inorg. Chem. Commun.. 6. 346-348 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Yamauchi, Y.Isobe, R.Ikeda, H.Kitagawa: "A Study on Hydrogen Adsorption of Polymer-Protected Pt Nanoparticles"Synth. Met.. (in press).

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2018-03-28  

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