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2006 Fiscal Year Final Research Report Summary

Evaluation of dynamics of liquid crystalline structures by time-resolved X-ray diffraction

Research Project

Project/Area Number 16350070
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials chemistry
Research InstitutionTokyo Institute of Technology

Principal Investigator

TAKANISHI Yoichi  Tokyo Institute of Technology, Faculty of Engineering, Dept.of Org. & Polym.Mat, Assistent Professor, 大学院理工学研究科, 助手 (80251619)

Project Period (FY) 2004 – 2006
KeywordsLiquid Crystals / X-ray diffraction / Structure analysis / Dynamics / Chirality
Research Abstract

The purposes of this research are (1) the determination of the structures of novel liquid crystalline phases by powerful and small bema X-ray diffraction using the confocal X-ray source, and (2) the evaluation of the layer dynamics of smectic liquid crystals by time-resolved x-ray diffraction using the image intensifier and CCD camera.
In the first year, I introduced confocal mirror in order to increase the incident X-ray intensity and to decrease the beam size. In the second year, I introduced the image intensifier and CCD camera in order to measure time resolved x-ray diffraction. At the same time, I measured the x-ray diffraction of the B4 and Bx phases of binary mixture of P-8-0PIMB and 5CB, and the determined the mixing ratio dependence of the structures for two years.
In the last year, I measured the terminal chain dependence of the layer structure of bent-shaped dimers. It was found that the structure changes from a single layer to the 2D frustrated one with increasing the terminal chain. Previously, the structure was considered to be bilayer in the compound in which the carbon number of the terminal chain length is 16, but it was found to form frustrated layer even in this compound.
With respect to the optically isotropic mesophase called SmBPiso, it has been already found that the selective reflection band was shifted by the laser irradiation. In order to study-the layer response at this process, I measured time-resolved x-ray diffraction of this phase. As a result, the layer response was found to be several hundreds of msec, which is longer than the optical response (several msec).

  • Research Products

    (20 results)

All 2006 2005 2004

All Journal Article (18 results) Book (2 results)

  • [Journal Article] Frustrated smectic layer structures in bent-shaped dimer liquid crystals studied by x-ray microbeam diffraction2006

    • Author(s)
      Y.Takanishi, M.Toshimitsu, M.Nakata, N.Takada, T.Izumi, K.Ishikawa, H.Takezoe, J.Watanabe, Y.Takahashi, A.Iida
    • Journal Title

      Phys. Rev. E 74

      Pages: 051703, 1-10

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Bent-core liquid crystals : their mysterious and attractive world2006

    • Author(s)
      H.Takezoe, Y.Takanishi
    • Journal Title

      Jpn. J. Appl. Phys. 45

      Pages: 597-625

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Intralayer molecular orientation in the B1 phase of a proto-type bent-core molecule P-6-O-PIMB studied by X-ray microbeam diffraction2006

    • Author(s)
      Y.Takanishi, H.Takezoe, J.Watanabe, Y.Takahashi, A.Iida
    • Journal Title

      J. Mater. Chem. 16

      Pages: 816-818

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Frustrated smectic layer structures in bent-shaped dimer liquid crystals studied by x-ray microbeam diffraction2006

    • Author(s)
      Y.Takanishi, M.Toshimitsu, M.Nakata, N.Takada, T.Izumi, K.Ishikawa, H.Takezoe, J.Watanabe, Y.Takahashi, A.Iida
    • Journal Title

      Phys.Rev.E 74

      Pages: 051703/1-051703/10

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Bent-core liquid crystals : their mysterious and attractive world2006

    • Author(s)
      H.Takezoe, Y.Takanishi
    • Journal Title

      Jpn.J.Appl.Phys. 45

      Pages: 597-625

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Intralayer molecular orientation in the B1 phase of a proto-type bent-core molecule P-6-O-PIMB studied by X-ray microbeam diffraction2006

    • Author(s)
      Y.Takanishi, H.Takezoe, J.Watanabe, Y.Takahashi, A.Iida
    • Journal Title

      J.Mater.Chem. 16

      Pages: 816-818

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Novel chiral filament in an achiral W-shaped liquid crystalline compound2005

    • Author(s)
      I.Miyake, Y.Takanishi, N.V.S.Rao, M.Kr.Paul, K.Ishikawa, H.Takezoe
    • Journal Title

      J. Mater. Chem. 15

      Pages: 4688-4694

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Observation of very large chiral domain in a liquid crystal phase formed by mixtures of achiral bent-core and rod molecules2005

    • Author(s)
      Y.Takanishi, G.J.Shin, J.C.Jung, S.W.Choi, K.Ishikawa, J.Watanabe, H.Takezoe, P.Toledano
    • Journal Title

      J. Mater. Chem. 15

      Pages: 4020-4024

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Terahertz spectroscopy in smectic phases of a bent-core molecule2005

    • Author(s)
      Y.Takansihi, K.Ishikawa, J.Watanabe, H.Taekzoe, M.Yamashita, K.Kawase
    • Journal Title

      Phys. Rev. E 71

      Pages: 061701, 1-3

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Dynamic and Micoscopic X-ray characterization of a Compound Chevron Layer in Electroclinic Liquid Crystals2005

    • Author(s)
      A.Iida, Y.Takahashi, Y.Takanishi, M.Nakata, K.Ishikawa, H.Takezoe
    • Journal Title

      Liq. Cryst. 32

      Pages: 717-726

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Organic field-effect transistors based on new TTF-based liquid crystalline materials2005

    • Author(s)
      M.Katsuhara, I.Aoyagi, H.Nakajima, T.Mori, T.Kambayashi, M.Ofuji, Y.Takanishi, K.Ishikawa, H.Takezoe, H.Hosono
    • Journal Title

      Synthetic Metals 149

      Pages: 219-223

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Electric-field-induced transition between the polarization-modulated and ferroelectric smectic-CSPF^* liquid crystalline states studied using microbeam x-ray diffraction2005

    • Author(s)
      M.Nakata, D.R.Link, Y.Takanishi, Y.Takahashi, J.Thisayukta, H.Niwano, D.A.Coleman, J.Watanabe, A.Iida, N.A.Clark, H.Takezoe
    • Journal Title

      Phys. Rev. E 71

      Pages: 011705, 1-6

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Novel chiral filament in an achiral W-shaped liquid crystalline compound2005

    • Author(s)
      I.Miyake, Y.Takanishi, N.V.S.Rao, M.Kr.Paul, K.Ishikawa, H.Takezoe
    • Journal Title

      J.Mater.Chem. 15

      Pages: 4688-4694

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Observation of very large chiral domain ina liquid crystal phase formed by mixtures of achiral bent-core and rod molecules2005

    • Author(s)
      Y.Takanishi, G.J.Shin, J.C.Jung, S.W.Choi, K.Ishikawa, J.Watanabe, H.Takezoe, P.Toledano
    • Journal Title

      J.Mater.Chem. 15

      Pages: 4020-4024

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Terahertz spectroscopy in smectic phases of a bent-core molecule2005

    • Author(s)
      Y.Takansihi, K.IshiKawa, I.Watanabe, H.Taekzoe, JVL Yamashita, K.Kawase
    • Journal Title

      Phys.Rev.E 71

      Pages: 061701/1-061701/3

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Dynamic and Micoscopic X-ray characterization of a Compound Chevron Layer in Electroclinic Liquid Crystals2005

    • Author(s)
      A.Iida, Y.Takahashi, Y.Takanishi, M.Nakata, K.Ishikawa, H.Takezoe
    • Journal Title

      Liq.Cryst. 32

      Pages: 717-726

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Organic field-effect transistors based on new TTF-based liquid crystalline materials2005

    • Author(s)
      M.Katsuhara, I.Aoyagi, H., Nakajima, T.Mori, T.Kambayashi, M.Ofuji, Y.Takanishi, K.Ishikawa, H.Takezoe, H.Hosono
    • Journal Title

      Synthetic Metals 149(2-3)

      Pages: 219-223

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Electric-field-induced transition between the polarization-modulated and ferroelectric smectic- CSPF^* liquid crystalline states studied using microbeam x-ray diffraction2005

    • Author(s)
      M.Nakata, D.R.Link, Y.Takariishi, Y.Takahashi, J.Thisayukta, H.Niwano, D.A.Coleman, J.Watanabe, A.Iida, N.A.Clark, H.Takezoe
    • Journal Title

      Phys.Rev.E 71

      Pages: 011705/1-011705/6

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] 電子材料ハンドブック2006

    • Author(s)
      高西陽一(共著)
    • Total Pages
      1012
    • Publisher
      朝倉書店
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] 実験化学講座27(第5版)機能性材料2004

    • Author(s)
      高西陽一(共著), 日本化学会編
    • Total Pages
      465
    • Publisher
      丸善株式会社
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2008-05-27  

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