Synthesis of laterally substituted alpha-methylstilbene-tolane liquid crystals

    Authors

    C. Y. Chang; S. Y. Chien; C. S. Hsu; S. Gauza;S. T. Wu

    Comments

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    Abbreviated Journal Title

    Liq. Cryst.

    Keywords

    HIGH-BIREFRINGENCE; MESOMORPHIC PROPERTIES; PHYSICAL-PROPERTIES; GRATINGS; Chemistry, Multidisciplinary; Crystallography; Materials Science, ; Multidisciplinary

    Abstract

    Three series of alpha-methylstilbene-tolane liquid crystals, 4-[2-(4-alkylphenyl)-1-ethynyl]-4'-fluoro-alpha-methylstilbene (3a-3e), 4-[2-(4-alkylphenyl)-1-ethynyl]-2'-methyl-4'-fluoro-alpha-methylstilbene (4a-4e) and 4-[2-(4-alkylphenyl)-1-ethynyl]-3'-methyl-4'-fluoro-alpha-methylstilbene (5a-5e), were synthesized and their phase transition temperatures characterized. All the alpha-methylstilbene-tolane liquid crystals exhibit an enantiotropic nematic phase. Compounds 5a-5e, which contain a lateral methyl group at the 3 position of the middle phenyl ring, display low melting points, a wide nematic range and a small enthalpy of fusion. Their potential applications for displays and laser-beam steering are noted.

    Journal Title

    Liquid Crystals

    Volume

    35

    Issue/Number

    1

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    1

    Last Page

    9

    WOS Identifier

    WOS:000252356000001

    ISSN

    0267-8292

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