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PROPERTIES OF THE LIQUID-CRYSTALS FORMED BY CERTAIN 4'-N-ALKYLBIPHENYL-4-YL 5-N-ALKYLTHIOPHENE-2-CARBOXYLATES

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JournalLIQUID CRYSTALS
DatePublished - Sep 1995
Issue number3
Volume19
Number of pages10
Pages (from-to)387-396
Original languageEnglish

Abstract

Thirty compounds, ten members of each of three homologous series of esters derived from 4-hydroxy-4'-n-octyl-, -nonyl-, and -decyl-biphenyl and the 5-n-alkylthiophene-2-carboxylic acids (methyl through to decyl homologues) have been prepared. The liquid crystal properties of these esters, which show extensive smectic polymorphism, have been investigated by thermal optical microscopy, differential scanning calorimetry, and miscibility studies. Four members of the corresponding 4-n-alkylbenzoates have also been prepared in order to compare their liquid crystal behaviour with the 5-n-alkylthiophene-2-carboxylate counterparts: both smectic and nematic thermal stability are higher for the 4-n-alkylbenzoates, by 30.6 degrees and 36.8 degrees C, respectively.

    Research areas

  • SEQUENCE, ESTERS, PHASES, SERIES

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