Synthesis of Optically Active (+)-4-n-Alkylphenyl-4′-(4”-methylalkylbenzoyloxy) benzoates and Effect on Liquid Crystal Display Properties

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Abstract
Three homologous series of optically active (+)-4-n-alkylphenyl-4′-(4”-methylalkylbenzoyoyloxy)benzoates (I) have been synthesized, R being normal alkyl group from C1 to C8 and n = 1, 2 and 3. Two additional compounds with R = CN and NO2 and n = 1 were also synthesized. Their phase transition temperatures have been determined and the results showed that all of the compounds exhibited chiral nematic phase. The application of these compounds as dopants in ester mixture for the field effect display to reduce the response time and to eliminate the bounce effect is presented.