Disclosed is a mesomorphic compound having an alkyl β-hydroxycarboxylate as the chiral group, which is represented by the formula:
wherein m is. an integer of 1 to 19, R₁ and R₂ are a phenylene or biphenylene group, X is -CO₂-, -OCH₂- or -CH₂O-, R is a methyl or ethyl group, n is an integer of 3 to 12 when X is -CO₂- or n is an integer of 2 to 12 when X is -OCH₂- or -CH₂O-, and * indicates the asymmetric carbon.
The mesomorphic compound is valuable as a ferroelectric liquid crystal or an additive to a ferroelectric liquid crystal or to a compound showing the Sm*C phase and having no chiral group.
本发明公开了一种以 β-羟基
羧酸烷基为手性基团的中间体化合物,该化合物由式表示:
其中 m 是为 1 至 19 的整数,R₁ 和 R₂ 为亚苯基或
联苯基,X 为 -CO₂-、-OCH₂- 或 -CH₂O-,R 为甲基或乙基、当 X 为 -CO₂- 时,n 为 3 至 12 的整数;当 X 为 -OCH₂- 或 -CH₂O- 时,n 为 2 至 12 的整数; * 表示不对称碳。
介形化合物作为
铁电液晶或
铁电液晶添加剂或显示 Sm*C 相且无手性基团的化合物非常有价值。