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Fundamental Studies on Thermotropic Liquid Crystal in rod-like polypeptides

Research Project

Project/Area Number 62550646
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 高分子物性
Research InstitutionTokyo Institute of Technology

Principal Investigator

WATANABE Junji  Department of Polymer Chemistry, Tokyo Institute of Technology, 工学部, 助教授 (90111666)

Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1988: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1987: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsPolypeptide / Thermotropic Liquid Crystal / Cholesteric Liquid Crystal / Helical Configuration / グランジャン組織 / ラセン構造
Research Abstract

In this study, a various numbers of polypeptides exhibiting a thermotropic cholesteric mesophase were synthesized and their cholsteric mesophase properties were examined. The following results were obtained. (1) The -helical polypeptides exhibiting a thermotropic liquid crystalline state can be produced by attaching long flexible side chains. (2) The kind of liquid crystal is a cholesteric with the helical twisting configuration. The cholesteric observed here can be characterized by its anomalous temperature dependence of helical twisting power exhibiting a helical sense inversion , which has not so far been observed and may be caused by the structural characteriatic having a rigid main chain and surrounding flexible side chains. (3) The solid Grandjean cholesterics with various pitches can be easily prepared by quenching the cholesteric mesophases into room temperature. Such choletseric films can be utilized as notched and band-pass filtered, which is based on a selective reflection of the circularly polarized light with a desired wavewlength.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] T.Yamanobe,;J.Watanabe他: Macromolecules. 21. 48-50 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] J.Watanabe,;T.Nagase: Macromolecules. 21. 171-175 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Yamanobe; M. Tsukahara; T. Komoto; J. Watanabe; I. Ando; I. Uematsu; K. Deguchi; T. Fujita; M. Imanari: "Conformation and Dynamic Aspects of Poly( -n-octadecyl L-glutamate) in the Solid State and Liquid Crystalline State As Studied by Variable-Temperature 13C CP/MAS NMR" Macromolecules. 21. 48-50 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] J. Watanabe; T. Nagase: "Thermotropic Polypeptides. 5. Temperature Dependence of Cholesteric Pitches Exhibiting a Cholesteric Sense Inversion" Macromolecules. 21. 171-175 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Junji,Watanabe;Tatsuya,Nagase: Macromolecules.

    • Related Report
      1988 Annual Research Report
  • [Publications] Junji,Watanabe;Takeaki,Miyamoto: Mol.Cyst.Lig.Cryst.

    • Related Report
      1988 Annual Research Report
  • [Publications] Junji Watanabe;Tatsuya Nagase: Macromolecules. 21. 171-175 (1988)

    • Related Report
      1987 Annual Research Report
  • [Publications] Junji Watanabe;Tatsuya Nagase: Macromolecules.

    • Related Report
      1987 Annual Research Report
  • [Publications] 渡辺順次: "液晶高分子-その基礎と応用-" シグマ出版, 269 (1988)

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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