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Advanced Materials

Ferroelectric Liquid Crystals with an alkanoyl group

Authors

  • Shogo Kobayashi,

    Corresponding author
    1. NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
    • NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
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    • joined NTT Electrical Communication Laboratories in 1962 after receiving his masters degree in chemistry from Tokyo Kyoiku University. He initially studied the polymerization and characterization of polymers, and applications of polymers to electrical communication systems. Since 1987 he has been involved in research on ferroelectric liquid crystals.

  • Shigeki Ishibashi,

    Corresponding author
    1. NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
    • NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
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    • received his masters degree, on electron impact spectroscopy, in 1984 from Kyushu University. On graduation, he joined NTT Electrical Communication Laboratories and carried out research on UV-curable resin. Since 1986 he has been working in the field of ferroelectric liquid crystals research and development.

  • Kazue Takahashi,

    Corresponding author
    1. NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
    • NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
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    • received her masters degree in applied chemistry in 1988 from Waseda University. On graduation, she joined NTT Applied Electronics Laboratories (NTT Interdisciplinary Research Laboratories) to work on polymeric ferroelectric liquid crystal materials research.

  • Shinji Tsuru,

    Corresponding author
    1. NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
    • NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
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    • joined NTT Electrical Communication Laboratories in 1974, after receiving his masters degree in polymer chemistry from Kyushu University. He was involved in the research and development of polymers for electrical communication systems. Since 1987 he has been working in the field of liquid crystal materials.

  • Fumio Yamamoto

    Corresponding author
    1. NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
    • NTT Interdisciplinary Research Laboratories Musashino, Tokyo 180 (Japan)
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    • received his Ph.D. in polymer chemistry from Tohoku University in 1981. He joined NTT Electrical Communication Laboratories in 1968, working on radiation chemistry, polymer surface characterization and polymer coating materials for optical-fiber cables. Since 1988 he has been responsible for a group working on advanced organic materials.


  • The authors thank Dr. Yoshikazu Ishii for his encouragement throughout this work. Thanks are also due to Misako Hirayama for her help with the sample preparation and measurements.

Abstract

Recent studies on ferroelectric liquid crystals (FLCs) with an alkanoyl group are reviewed in this article. The FLCs exhibit large spontaneous polarization, especially when another chiral group is introduced at the opposite side of the core. The maximum value reaches 1130 nC/cm2, which is almost the same as the total transverse dipole in the molecule. Fastswitching FLC mixtures can be obtained by using these compounds. The synthesis and properties of FLC polymers having the same mesogen and chiral group are also described, and some applications of the FLC mixtures in devices for optical communication reported.

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