申请人:Mitsubishi Gas Chemical Co., Inc.
公开号:US20030124268A1
公开(公告)日:2003-07-03
An optically active compound of the general formula (1) useful as a chiral dopant and use thereof,
1
wherein each of m and n is independently an integer of 4 to 8, A is —Ph—COO—Ph—, —Ph—Ph—COO—, —Cy—COO—Ph—, —Ph—OOC—Ph—COO—, —Ph—OOC—Cy—COO—, —Ph—OOC—Np—COO— or —Np—OOC— in which —Ph— is a 1,4-phenylene group, —Cy— is a trans-1,4-cyclohexylene group and —Np— is a 2,6-naphtylene group, and C* is an asymmetric carbon atom.
Having a helical twisting power (HTP) of at least 9 and having a property that the helical pitch induced decreases with an increase in temperature, the optically active compound of the present invention has an excellent value as a chiral dopant for a nematic liquid crystal.
一种具有一般公式(1)的光学活性化合物,用作手性掺杂剂及其用途,其中m和n各自独立地为4至8的整数,A是—Ph—COO—Ph—,—Ph—Ph—COO—,—Cy—COO—Ph—,—Ph—OOC—Ph—COO—,—Ph—OOC—Cy—COO—,—Ph—OOC—Np—COO—或—Np—OOC—,其中—Ph—是1,4-苯基ylene基团,—Cy—是反式-1,4-环己基基团,而—Np—是2,6-萘基基团,而C*是手性碳原子。具有至少9的螺旋扭曲力(HTP)并具有随着温度升高而降低引起的螺旋螺距的性质,本发明的光学活性化合物作为向列液晶的手性掺杂剂具有优良的价值。