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

2007 Fiscal Year Final Research Report Summary

Studies of Synthesis and Magnetism on Novel Chiral Organic Radical Crystals

Research Project

Project/Area Number 17550129
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials chemistry
Research InstitutionMinerva Light Lab. (2006-2007)
Kyoto University (2005)

Principal Investigator

YAMAUCHI Jun  Minerva Light Lab., Minerva Light Lab, Chief Researcher (10027071)

Co-Investigator(Kenkyū-buntansha) TAMURA Rui  Kyoto, University, 大学院・人間・環境学研究科, Professor (60207256)
TAKAHASHI Hiroki  Kyoto, University, 大学院・人間・環境学研究科, Assistant Professor (00321779)
Project Period (FY) 2005 – 2007
Keywordschiral organic molecule / paramagnetic liquid crystl / ferroelectric liquid crytal / nitroxide radical / radical liquid crytal / magnetism / magnetic susceptbility / ESR
Research Abstract

Many novel liquid crystals containing electron spins were synthethized. Those are paramagnetic as magnetism, and the organic radical nature is nitroxide radical and the radical part exists in the center of the molecule so that the liquid crystals may be effected by external magnetic field. In addition to this effect this reseach intends to add electric field effect for the liquid crystals.
The newly synthesized paramagnetic liquid crystals showed nematic phase, chiral nematic phase, smectic C phase, and chiral smectic C phase. Because of the purely organic materials the transition temperatures are found to he very low as compared to the usual paramagnetic liquid crystals. Those typical characteristics were investigated using ESR and magnetic susceptibility measurements.
The fundamental findings are
(1) These molecules exhibit typical nitroxide anisotropy as are shown by ESR angular dependence in the liquid crystal cells.
(2) Those molecules are effected by the electric field as well as magnetic field, thus these magneto-electric effects are remarkably important in the future device developments.
(3) The magnetic susceptibility was found to be very characteristic in the sense of new magnetic behaviors. This may be because of those paramagnetic liquid crystals, so that this newly characterized behavior will be key to develop those materials as magnetic devices in future.
As a future research development the ESR measurements in the different microwave frequency are promising to extend fundamental scientific research.

  • Research Products

    (18 results)

All 2008 2007 2006 Other

All Journal Article (11 results) (of which Peer Reviewed: 2 results) Presentation (6 results) Book (1 results)

  • [Journal Article] Nitrocides ; Applications in Chemistry, Biomedicine and Matenal Science2008

    • Author(s)
      Likhitenstein, Yamauchi, Smirnov, Tamura, Nakatsuji
    • Journal Title

      Wiley-VCH

      Pages: 1-419

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Synthesis and characterization of novel all-organic liquid crystalline radicals2007

    • Author(s)
      Yoshio Uchida
    • Journal Title

      Mol.Cryst.Liq.Cryst. 479

      Pages: 213-221

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] 電子スピン共鳴法(ESR)を用いた素材の構造と揺らぎに関する研究2007

    • Author(s)
      山内 淳
    • Journal Title

      電子スピンサイエンス 5

      Pages: 4-13

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Substitutional effect on g-tensor;Multifrequency ESR studies and DFT-calculations of polycrystalline phenoxyl radicals in diamagnetic crystals2007

    • Author(s)
      Toshiki Yamaji
    • Journal Title

      J.Chem.Phys. 111

      Pages: 4612-4619

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] EPR investigations on molecular orientation of paramagnetic liquid crystals in a surface-stabilized liquid crystal cell2007

    • Author(s)
      Noda, Yamauchi, Tamura, et. al.
    • Journal Title

      Applied Magnetic Resonance 33(in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] ESR studies of the single crystal of proxyls2007

    • Author(s)
      Noda, Yamauchi, Tamura, et. al.
    • Journal Title

      Applied Magnetic Resonance 33(in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Synthesis and characterization of novel all-organic crystalline radicals2007

    • Author(s)
      Uchida, Tamura, Yamauchi, et. al.
    • Journal Title

      Molecular crystals and Liquid Crystals 479

      Pages: 213-221

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Research on the structures and fluctuations of radical materials as studied by ESR2007

    • Author(s)
      Yamauchi
    • Journal Title

      J. Electron Spin Science 4

      Pages: 39916

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Substitutional effect on g-tensor multifrequency ESR studies and DFT-calculations of polycrystaline phenoxyl radicals in diamagnetic crystals2007

    • Author(s)
      Yamaji and Yamauchi
    • Journal Title

      J. Chem. Phys. 111

      Pages: 4612-4619

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Ferroelectric properties of paramagnetic all-organic, chiral nitroxide radicalsliquid crystals2006

    • Author(s)
      Ikuma, Tamura Yamauchi, et. al.
    • Journal Title

      Advance Materials 18

      Pages: 477-480

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Paramagnetic FLCs containing an organic radical component2006

    • Author(s)
      Ikuma, Tamura Yamauchi, et. al.
    • Journal Title

      Ferroelectrics 343

      Pages: 119-125

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] キラルニトロキシル基を有するディスコティック液晶の合成2008

    • Author(s)
      内田 幸明
    • Organizer
      日本化学会年春季年会
    • Place of Presentation
      立教大学
    • Year and Date
      2008-03-26
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Molecular orientation of chiral paramagnetic organic liquid crystals in a magnetic field2006

    • Author(s)
      Shimono, Tamura, Yamauchi, et. al.
    • Organizer
      4th International conference on nitroxide radicals
    • Place of Presentation
      Novosibirsk, Russia
    • Year and Date
      20060920-24
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] ESR studies of all-organic paramagnetic liquid crystals showing a smectic C or chiral smectic C phase in a surface-stabilized liquid crystal cell2006

    • Author(s)
      Noda, Yamauchi, Tamura, et. al.
    • Organizer
      5th Asia pacific EPR/ESR symposium
    • Place of Presentation
      Novosibirsk, Russia
    • Year and Date
      20060824-27
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] ESR study of the single crystal of proxyls2006

    • Author(s)
      Noda, Yamauchi, Tamura, et. al.
    • Organizer
      5th Asia pacific EPR/ESR symposium
    • Place of Presentation
      Novosibirsk, Russia
    • Year and Date
      20060824-27
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Preparation and properties of paramagnetic all-organic crystals containing a chiral five-menbered cyclic nitroxide unit within the ring core

    • Author(s)
      Tamura, et. al.
    • Organizer
      4th International conference on nitroxide radicals
    • Place of Presentation
      Novosibirsk, Russia
    • Year and Date
      00000920-24
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Preparation and properties of paramagnetic, all-organic chiral niotroxyl radical liquid crystals

    • Author(s)
      Tamura, et. al.
    • Organizer
      21st International liquid crytal conference
    • Place of Presentation
      Keystone, USA
    • Year and Date
      00000702-07
    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] Nitroxides;Applications in Chemistry, Biomedicine and Material Science2008

    • Author(s)
      山内 淳
    • Total Pages
      419
    • Publisher
      Wiley-VCH
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2010-02-04  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi