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Photodynamic Chiral Molecular Switches with Thermal Stability: From Reflection Wavelength Tuning to Handedness Inversion of Self-Organized Helical Superstructures

Authors

  • Dr. Yannian Li,

    1. Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242 (USA)
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  • Dr. Chenming Xue,

    1. Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242 (USA)
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  • Mengfei Wang,

    1. Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242 (USA)
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  • Dr. Augustine Urbas,

    1. Materials and Manufacturing Directorate, Air Force Research Laboratory WPAFB, Dayton, OH 45433 (USA)
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  • Prof. Quan Li

    Corresponding author
    1. Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242 (USA)
    • Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242 (USA)

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  • This work is supported by the Air Force Office of Scientific Research (AFOSR FA9550-09-1-0193 and FA9950-09-1-0254).

Abstract

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A good turn: Three compounds that bear two axially chiral bridged binaphthyl units were developed as photodynamic chiral dopants for nematic liquid crystals. For compounds with suitable bridge lengths, a change in the dihedral angle induced a switch of the binaphthyl units from the cisoid to the transoid form upon UV irradiation, which led to an inversion of the handedness of the helices.

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