PBb13 Phase Transitions of (R)- and (S)-Enantiomeric Mixtures of Antiferroelectric Liquid Crystals

抄録

A series of 2,3-substitued-alkyl-4-(4'-nonyloxybiphenyl-4-carbonyloxy)benzoate which show antiferroelectric phases, have been synthesized and their mesomorphic properties investigated. The phase transitions have been determined by using an optical polarizing microscopy and a differential scanning calorimeter. The influence of the 2, 3-substitued moiety of the chiral carbon on the mesomorptfic properties has been studied. In the (R)- and (S)- enantiomeric mixtures, the thermal stability of chiral smectic phases varies with the mixing ratio. Phase diagrams were constructed for the enantiomeric mixtures.