申请人:Canon Kabushiki Kaisha
公开号:US04798680A1
公开(公告)日:1989-01-17
An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR1## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): ##STR2## wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substituent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.
公式(Ia)表示的是一种光学活性的2-氟-1-烷醇化合物,其中R是具有1-16个碳原子的烷基,C*是一个不对称的碳原子;公式(Ib)表示的是一种由氟代烷醇衍生而来的光学活性化合物,其中R和C*与上述相同,m为1或2,n为0或1,A是一个可释放的取代基。由于氟原子直接连接到不对称碳原子,这些化合物在增加自发极化、改善液晶组分的电场响应特性和控制液晶状态方面特别有效。