Liquid Crystals V. Nematic Materials Derived fromp-Alkylcarbonato-p'-Alkoxyphenyl Benzoates

Abstract

In our continued effort to synthesize materials which exhibit nematic behavior at room temperature, homologous p-alkylcarbonato-p-'-alkoxyphenyl benzoates were prepared. Of the 48 compounds that were synthesized, 27 exhibited enantiotropic and 14 monotropic nematic properties while only 7 were not liquid crystalline. One binary mixture of enantiotropic derivatives had a nematic range of 27–73°C while a ternary mixture exhibited nematic behavior between 24 and 76°C. In addition, seven other mixtures had crystal nematic transition temperatures below 30°C.