Mesomorphic and dielectric properties of esters useful for formulation of nematic mixtures for dual frequency addressing system

    Authors

    D. Ziobro; P. Kula; J. Dziaduszek; M. Filipowicz; R. Dabrowski; J. Parka; J. Czub; S. Urban;S. T. Wu

    Abstract

    Mesomorphic and dielectric properties of three homologous series of two and three ring fluorosubstituted esters are described. They are 4-cyano-3-fluorophenyl 4-alkyloxy-2-fluorobenzoates, 4-cyano-3-fluorophenyl 4-(4-alkylbenzoyloxy)-2-fluorobenzoates and 3-fluoro-4-cyanophenyl, or 3-fluoro-4-isothiocyanatophenyl or 3,4- difluorophenyl 4'-alkyl-2,3-difluoro-biphenyl-4-carboxylates. The compounds exhibit the nematic mesophase accompanied by the smectic A or smectic C mesophase in some cases. Most of them show strong dependence of the dielectric anisotropy Delta epsilon upon frequency, at low frequencies Delta epsilon reaches a value similar to 200, while at high frequencies a small negative dielectric anisotropy appears.

    Journal Title

    Opto-Electronics Review

    Volume

    17

    Issue/Number

    1

    Publication Date

    1-1-2009

    Document Type

    Article

    First Page

    16

    Last Page

    19

    WOS Identifier

    WOS:000264843900003

    ISSN

    1230-3402

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