Syntheses and Physical Properties of Liquid Crystal Compounds Containing 1,2-propylene Group

Abstract

New series of liquid crystals containing a 1,2-propylene bridging group have been synthesized. Their transition temperatures and electro-optical properties were measured and compared to those of corresponding 1,2-ethylene derivatives. The 1,2-propylene derivatives were shown to be effective to lower the melting point of the mixture and to prepare the liquid crystal composition of wide temperature range. And their clearing point depends much on the position of methyl group.