Photoresponsive Glass-Forming Butadiene-Based Chiral Liquid Crystals with Circularly Polarized Photoluminescence

Authors

  • Ratheesh K. Vijayaraghavan,

    1. Photosciences and Photonics Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, CSIR Trivandrum, Kerala 695019 (India)
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  • Shibu Abraham,

    1. Photosciences and Photonics Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, CSIR Trivandrum, Kerala 695019 (India)
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  • Haruhisa Akiyama,

    1. Molecular Smart System Group, Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565 (Japan)
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  • Seiichi Furumi,

    1. National Institute for Materials Science (NIMS) 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)
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  • Nobuyuki Tamaoki,

    Corresponding author
    1. Molecular Smart System Group, Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565 (Japan)
    • Molecular Smart System Group, Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565 (Japan).
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  • Suresh Das

    Corresponding author
    1. Photosciences and Photonics Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, CSIR Trivandrum, Kerala 695019 (India)
    • Photosciences and Photonics Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, CSIR Trivandrum, Kerala 695019 (India).
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  • The research fellowship from Japanese Society for Promotion of Science (JSPS) and the travel support from Department of Science and Technology (DST), India under Indo-Japanese Scientific Collaborative Project (IJSCP) program are gratefully acknowledged. Research grants from the Council of Scientific and Industrial Research Network Program NWP 0023 are gratefully acknowledged. This is contribution No.PPG-255 from NIIST-PPG. Supporting Information is available online from Wiley InterScience or from the authors.

  • Dedicated to Professor M.V. George on the occasion of his 80th birthday.

Abstract

The synthesis and study of the photo- and thermoresponsive behavior of a series of novel trimesogens consisting of a diphenylbutadiene core linked to cholesterol moieties on either side via flexible alkyl chains are reported. These molecules possess the combined glass-forming properties of bischolesterols and the photochromic and luminescent properties of the butadiene moiety. The pitch of the cholesteric phase of these materials could be continuously varied thermally and photochemically, making it possible to tune the color of the film over the entire visible region. The color images thus generated could be stabilized by converting them to N* glasses. These materials were also highly photoluminescent, exhibiting circularly polarized characteristics in the glassy liquid-crystalline state even by linearly polarized excitation.

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