A compound expressed by the following formula (1) and a liquid crystalline composition with using it are provided: ##STR1## wherein, either one of rings A, B and C denotes ##STR2## remaining two of them denote each independently ##STR3## R denotes an alkyl group or an alkoxy group with 4-16 carbon atoms, R* denotes ##STR4## in which, R.sub.1 denotes CH.sub.3, CF.sub.3, CH.sub.2 F or CHF.sub.2, R.sub.2 denotes an alkyl group with 1-10 carbon atoms and m denotes 2-12. The said compound exhibits a ferroelectric liquid crystalline phase and an antiferroelectric liquid crystalline phase by itself.
提供以下式子(1)所表示的化合物以及使用它的液晶组成物:
其中,环A、B和C中的任意一个表示##STR2## 其余两个各自独立地表示##STR3## R表示具有4-16个碳原子的烷基或烷氧基,R*表示##STR4## 其中,R.sub.1表示CH.sub.3、CF.sub.3、CH.sub.2 F或CHF.sub.2,R.sub.2表示具有1-10个碳原子的烷基,m表示2-12。该化合物本身表现出
铁电液晶相和反
铁电液晶相。