Synthesis of alkyl phenyl cyclohexane carboxylic ester liquid crystals

Hong Tang, Huanmei Wu

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1 Scopus citations


To find a new simple method of synthesizing liquid crystals, the trans- and cis-4-(4′-pentylphenyl) cyclohexanecarboxylic acids were synthesized by selective reduction of 4′-pentylbiphenyl-4-carboxylic acid. The isomerization of 4′-alkylphenyl-4-cis-cyclohexanecarboxylic acid to its trans isomer was realized. Their structure assignments were confirmed by 13C NMR. Five compounds of general structure R-X-Y-COO-Z-R′, where X, Y, Z are either phenyl or trans cyclohexyl rings, were synthesized. Their structures were determined by IR, NMR, and MS. The phase transition temperatures were measured by DSC. Mesomorphic textures were recognized by polarized microscopy. All compounds exhibited liquid crystal phases, the influences of terminal groups on the phase transition temperatures were discussed.

Original languageEnglish (US)
Pages (from-to)100-103
Number of pages4
JournalQinghua Daxue Xuebao/Journal of Tsinghua University
Issue number12
StatePublished - Dec 1 1998


ASJC Scopus subject areas

  • Engineering(all)
  • Computer Science Applications
  • Applied Mathematics

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