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2003 Fiscal Year Final Research Report Summary

Construction of Super-Structured Spin-Polarized Donor having Spin-rectifying Property

Research Project

Project/Area Number 13304056
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 機能・物性・材料
Research InstitutionThe University of Tokyo

Principal Investigator

SUGAWARA Tadashi  The University of Tokyo, Graduate School of Arts and Science, Professor, 大学院・総合文化研究科, 教授 (50124219)

Co-Investigator(Kenkyū-buntansha) KAWADA Yuzo  Ibaraki University, Faculty of Science, Professor, 理学部, 教授 (10152969)
MATSUSHITA Michio m.  The University of Tokyo, Graduate School of Arts and Science, Research Associate, 大学院・総合文化研究科, 助手 (80295477)
Project Period (FY) 2001 – 2003
KeywordsSpin-Polarized Donor / Organic Ferromagnetic Metal / Organic Field Effect Transistor / Magneto-Resistance / Nano Particle / Molecular Wire / Molecular Wire Network / Molecular Magnetism
Research Abstract

The ultimate goal of this project is to construct super-structured "spin-polarized donors" that operate as molecule-based spin-rectifying devices. The following findings along this line have been achieved during the project period.
1.In order to improve the conductivity of its ionradical salt of benzo-annulated OF based spin-polarized donors, sulfur atoms of the donor moiety were replaced with selenium atoms. The ionradical salts and the charge-transfer complexes of these spin-polarized donors were also prepared. Among them, an ion-radical salt of a selenium-introduced spin-polarized donor (ESBN) turned out to behave as the low band-gap (Ea = 40 meV) semiconductor, which exhibited the possibility to show the metallic conductivity under a high pressure. Such ion-radical salts are expected to manifest spin-alignment through the spin-polarized conduction electrons on the basis of the double exchange mechanism.
2.A novel TTF based donor, OdTBN, having long alkyl chains was prepared to increa … More se the feasibility of fabrication. A thin film composed of OdTBN was formed on a silicon wafer and it was found that the sample acted as a field-effect transistor (FET).
3.The preparative method of Roll nano-particles chemisorbed by organic π-radical has been established. The nano-particles, with an average diameter of 4nm, were chemisorbed by ca. 100 molecules of a thiol-derivatized spin-polarized donor, which was generated by the reduction cleavage of the corresponding disulfide precursor. The extreme broadening of ESR line-shape suggests the presence of the exchange interaction between localized spins of chemisorbed radicals and conduction electrons in the gold nano-particle. Moreover, it was to be noted that the evaluation technique of the precise size and its distribution of gold nano-particles by means of an X-ray small-angle-scattering method was established in collaboration with Rigaku-Denki Corporation.
4.Various molecular wires bearing thiol groups at both ends were synthesized and it was found that they constructed network-like structures with gold nano-particles on interdigitated gold electrodes. The conducting property of the networked gold nano-particles strongly depended on the size of the nano-particles and the structure and the length of molecular wires. The conductivity of the networked structures was measured under the application of an external magnetic field and it was found that some of the samples exhibited a magneto-resistance effect. Less

  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] 松下未知雄, 菅原正, ほか3名: "Formation of Self-Assembled Monolayer of Phenylthiol Carrying Nitronyl Nitroxide"Chemistry Letters. 2002. 596-597 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 原田弦太, 菅原正, ほか3名: "Preparation and Characterization of Gold Nano-Particles Chemisorbed by π-Radical Thiols"Chemistry Letters. 2002. 1030-1031 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 泉岡明, 菅原正, ほか4名: "Charge Transfer Assisted Ferromagnetic Coupling Observed in an Ion-Radical Salt of a Cross-Cyclophane TTF-Based Donor"Chemistry Letters. 2002. 910-911 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 原田弦太, 菅原正, ほか3名: "A novel TTF-based donor carrying four nitronyl nitroxides"Tetrahedron Letters. 44. 4415-4418 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中崎城太郎, 菅原正, ほか5名: "Design of Spin-Polarized Molecular Wire as a Prototypal Unimolecular Quantum Spin Device"Internet Electronic Journal of Molecular Design. 2. 112-127 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中崎城太郎, 菅原正, ほか5名: "Design and preparation of pyrrole-based spin-polarized donors"Journal of Materials Chemistry. 13. 1011-1022 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 谷口伸一, 菅原正, ほか3名: "Noncatalytic, solvent-free thermal formation of cyclic trimers using 1,6-bis (acyloxylmethyl)haxa-2,4-diene derivatives"Tetrahedron Letters. 45. 2671-2675 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高須勲, 泉岡明, 菅原正: "Observation of Quantum Paraelectricity in an Intermolecular Ionic Hydrogen-Bonded Crystal of a Squaric Acid Derivative"Journal of Physical Chemistry. B108. 5527-5531 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅原正, 松下未知雄: "超分子化学は何を目指すか"化学と教育. 50. 94-97 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅原正: "有機π配位子による金ナノ粒子の機能化とネットワーク化"有機合成化学協会誌. 62. 447-458 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅原正, 櫻井 尋海, 松下未知雄: "ヨウ素酸化による有機ラジカル分子のスピン多重度変換"FIU (Forum on Iodine Utilization) Letter. 4. 5-6 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 谷口伸一, 松下未知雄, 菅原正: "π型分子ワイヤーで連結した金ナノ粒子ネットワークの構造と電子輸送"ナノ学会会報. 2. 55-62 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅原正, 中崎城太郎, 松下未知雄: "'Nanotechnology toward the Organic Photonics' Self-Assembling Organic Ferromagnet : Frontier Orbital Control of Spin-Polarized Organic Radicals"GooTech. 27 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅原正, 中崎城太郎: "化学フロンティア(6)「分子ナノテクノロジー」有機量子スピン素子の開発と設計"化学同人. 10 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅原正: "先端化学シリーズVI「界面・コロイド/ナノテクノロジー/分子エレクトロニクス/ナノ分析」金ナノ粒子ネットワークで回路をつくる"丸善出版. 11 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Matsushita, Michio, Sugawara, Tadashi et al.: "Formation of self-assembled monolayer of phenylthiol carrying nitronyl nitroxide on gold surface."Chemistry Letters. 2002. 596-597 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Harada, Genta, Sugawan, Tadashi et al.: "Preparation and characterization of gold nano-particles chemisorbed by π-radical thiols"Chemistry Letters. 2002. 1030-1031 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Izuoka, Akira, Sugawaia, Tadashi, et al.: "Charge transfer assisted ferromagnetic coupling observed in an ion-radical salt of a crass-cyclophane TTF-based donor"Chemistry Letters. 2002. 910-911 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Harada, Genta, Sugawara, Tadashi, et al.: "A novel TTF-based donor carrying four nitronyl nitroxides."Tetrahedron Letters,. 44. 4415-4418 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakazaki, Jotaro, Sugawama, Tadashi et al.: "Design of spin-polarized molecular wire as a prototypal unimolecufar quantum spin device."Internet Electronic Journal of Molecular Design. 2. 112-127 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakazaki, Jotaro, Sugawara, Tadashi et al.: "Design and preparation of pyrrole-based spin-polarized donors"Journal of Materials Chemistry. 13. 1011-1022 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taniguchi, Shin-ichi, Sugawara, Tadashi et al.: "Noncatalytic, solvent-free thermal formation of cyclic trimers using 1,6-bis(acyloxymethyl)hexa-2,4-diyne derivatives."Tetrahedron Letters. 45. 2671-2675 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takasu, Isao, Izuoka, Akira, Sugawara, Tadashi: "Observation of Quantum Paraelectricity in an Intermolecular Ionic Hydrogen-Bonded Crystal of a Squaric Acid Derivative."Journal of Physical Chemistry B. 108. 5527-5531 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugawara, Tadashi, Matsushita, Michio: "Supramolecular chemistry"Kagaku to Kyoiku. 50. 94-97 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugawara, Tadashi: "Functionalized gold nanoparticles chemisorbed by organic π-ligands and their networked structures."Yuki Gosei Kagaku Kyokaishi. 62. 447-458 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugawara, Tadashi, Sakurai, Himmi, Matsushita, Michio M: "Manipulation of Organic Spin Molecules by Iodine Oxidation."FIU (Forum on Iodine Utilization) Lett.. 4. 5-6 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taniguchi, Shi-ichi, Matsushita, Michio M., Sugawara, Tadashi: "Structures and Electron Transport of Gold Nanoparticle Network Monnnected by π-Molecular Wire"The Bulletin of the Nano Science and Technology. 2. 55-62 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugawara, T., Nakazaki, J., Matsushita, M.M.: "Self-Assembling Organic Ferromagnet : Frontier Orbital Control Spun-Polarized Organic Radicals."Nanotechnology toward the Organic Photonics (Sasabe, H. Ed.)(Goo Tech Ltd. Chitose, Japan). 27. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugawara, Tadashi, Nakazaki, Jotaro: "Development and design of organic quantum spin device."Frontier of Chemistry (6) 'Molecular Nanotechnology' (K Matsushige, K.Tanaka, eds.) (Kagaku Dojin). 10. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugawara Tadashi: "Electric circuit consists of gold nano-particle network"Interface colloid / Nanotechnology / Molecular Electronics / Nano Analysis (Maruzen, Tokyo, Japan). 11. (2004)

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Published: 2005-04-19  

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