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

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.