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From the same journal

The synthesis and comparison of the liquid crystalline properties of certain 1-(4'-n-alkoxypolyfluorobiphenyl-4-yl)-2-(trans-4-n-pentylcyclohexyl)-ethenes and -ethanes carrying four, six or eight fluoro-substituents

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JournalLIQUID CRYSTALS
DatePublished - Oct 1997
Issue number4
Volume23
Number of pages14
Pages (from-to)575-588
Original languageEnglish

Abstract

The synthesis and mesomorphic properties of a variety of polyfluorinated alkylaryl-ethanes and -ethenes are reported. The number and position of the symmetrically disposed fluoro-substituents has been varied from six to four and the mesomorphic properties of the compounds are compared with those of the analogous octafluoro-substituted compounds previously reported. All the compounds are moderately low melting, mesomorphic and the type of mesophase formed is dependent upon the number and position of the fluoro-substituents. Increasing the number of fluoro-substituents from four, to six and to eight in a series of polyfluoro-alkylarylethanes decreases the mesophase thermal stability in a stepwise manner and eliminates smectic properties whilst retaining the nematic phase.

    Research areas

  • TRANSITION-TEMPERATURES, MESOMORPHIC PROPERTIES, MOLECULAR-STRUCTURE, BIPHENYLS, POSITION, SYSTEMS, CORE

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