Abstract
Abstract A homologous series of 2′-cyano-4′- n-alkylphenyl-4- n-alkylbiphenylcarboxylates and 4- n-alkylcyclohexyl-p-benzoates were synthesized by treating 2′-cyano-4′-n-alkyl substituted phenols with 4-n-alkyl substituted biphenyl carboxylic acids and cyclohexyl benzoic acids. The method of synthesis was discussed. All these compounds were nematogenic in character and their phase transition temperatures were examined. A wide range of mesomorphism was observed in almost all the homologous series. IR, NMR and dielectric property of these compounds were studied. The negative dielectric anisotropic property of these liquid crystalline compounds makes them suitable for application in positive GH display devices.
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