申请人:Motoyama Yuki
公开号:US20050260358A1
公开(公告)日:2005-11-24
An optically active compound of the general formula (1),
wherein n is an integer of 4 to 8, X is -Ph-COO-Ph-Ph-, -Ph-Ph-COO-Ph-, -Ph-OC-Ph-Ph-, -Ph-Ph-OC-Ph-, -Ph-Ph-Ph-, -Cy-COO-Ph-Ph-, -Ph-Ph-OC-Cy-, -Ph-OC-Ph-COO-Ph-, -Ph-OC-Cy-COO-Ph-, -Ph-OC-Np-COO-Ph-, -Np-OC-Ph- or -Ph-COO-Np- in which -Ph- is a 1,4-phenylene group, -Cy- is a trans-1,4-cyclohexylene group and -Np- is a 2,6-naphthylene group, and C* is an asymmetric carbon, and a nematic liquid crystal composition containing the above optically active compound. According to the present invention, there is provided a nematic liquid crystal composition containing the optically active compound having a helical twisting power (HTP) of 10 or more and giving a chiral dopant for a nematic liquid crystal, which chiral dopant has a property that the pitch of its induced helix decreases in length with an increase in temperature.
一种具有一般式(1)的光学活性化合物,其中n为4至8的整数,X为-Ph-COO-Ph-Ph-、-Ph-Ph-COO-Ph-、-Ph-OC-Ph-Ph-、-Ph-Ph-OC-Ph-、-Ph-Ph-Ph-、-Cy-COO-Ph-Ph-、-Ph-Ph-OC-Cy-、-Ph-OC-Ph-COO-Ph-、-Ph-OC-Cy-COO-Ph-、-Ph-OC-Np-COO-Ph-、-Np-OC-Ph-或-Ph-COO-Np-,其中-Ph-是1,4-苯基,-Cy-是反-1,4-环己基,-Np-是2,6-萘基,C*是不对称碳,并且一种向列相液晶组合物,其中包含上述光学活性化合物。根据本发明,提供了一种向列相液晶组合物,该组合物具有10或更高的螺旋扭曲功率(HTP),并且为向列相液晶的手性掺杂剂,该手性掺杂剂的诱导螺旋的螺距随温度升高而缩短的特性。