申请人:Nippon Telegraph and Telephone Corporation
公开号:US05059345A1
公开(公告)日:1991-10-22
An optically active compound represented by the general formula (I) of: R--Z--COO--(Ph).sub.k --Ph(Y)--CO--(CH.sub.2).sub.m C*HE L (1) In the general formula (I); R is an alkyl or alkoxy group having 4 to 22 carbon atoms; Z is the one selected from the group consisting of --Ph--, --Ph(X)--, --Ph--Ph--, Ph(X)--Ph--, --Ph--cy--, --Ph(X)--cy-- and --py--Ph-- is a 1,4-substituted phenylene group; --Ph--Ph-- is a 4,4'-substituted diphenylene group; --cy-- is a trans-1,4-cyclohexane group, --py is 2,5-substituted pyrimide group; X is a halogen atom at the ortho-position to R; k is zero or 1, Y is the one selected from the group consisting of H, OH, halogen atoms and methyl group; C* is an asymmetric carbon atom; E is the one selected from the group consisting of methyl group, halogen atoms and CF.sub.3 ; L is an alkyl, aryl or aralkyl group having not more than 10 carbon atoms; and m is an integer of zero to 6 where m takes zero when Y is H and Z is --Ph-- or --Ph--Ph--. The optically active compound is usable as an ingredient for a liquid crystal composition which has high spontaneous polarization, exhibits the Sc* phase (chiral smectic C liquid crystalline phase) in a wide temperature range and high speed response.
一种光学活性化合物,其通式表示为(I):R-Z-COO-(Ph).sub.k -Ph(Y)-CO-(CH.sub.2).sub.m C*HE L (1) 在通式(I)中,R为4至22个碳原子的烷基或烷氧基;Z为从以下组中选择的一种:-Ph-,-Ph(X)-,-Ph-Ph-,Ph(X)-Ph-,-Ph-cy-,-Ph(X)-cy-和-py-Ph-,其中Ph为1,4-取代苯基;-Ph-Ph-为4,4'-取代二苯基基;-cy-为反式1,4-环己烷基,-py为2,5-取代嘧啶基;X为正交于R的邻位的卤素原子;k为零或1,Y为从以下组中选择的一种:H,OH,卤素原子和甲基基团;C*为一个不对称碳原子;E为从以下组中选择的一种:甲基基团,卤素原子和CF.sub.3;L为具有不超过10个碳原子的烷基,芳基或芳烷基;m为0至6的整数,当Y为H且Z为-Ph-或-Ph-Ph-时,m取零。该光学活性化合物可用作液晶组成物的成分,该液晶组成物具有高自发极化,展示Sc*相(手性C相)的宽温度范围和高速响应。