Synthesis of alkyl phenyl cyclohexane carboxylic ester liquid crystals

Hong Tang, Huanmei Wu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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
Volume38
Issue number12
StatePublished - Dec 1 1998
Externally publishedYes

Fingerprint

Cyclohexane
Liquid Crystal
Liquid crystals
Superconducting transition temperature
Esters
Phase transitions
Nuclear magnetic resonance
Synthesis
Acids
Phase Transition
Isomerization
Carboxylic acids
Isomers
Microscopic examination
Textures
Microscopy
Texture
Assignment
Ring

ASJC Scopus subject areas

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

Cite this

Synthesis of alkyl phenyl cyclohexane carboxylic ester liquid crystals. / Tang, Hong; Wu, Huanmei.

In: Qinghua Daxue Xuebao/Journal of Tsinghua University, Vol. 38, No. 12, 01.12.1998, p. 100-103.

Research output: Contribution to journalArticle

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