Optically active benzthiazoles, liquid crystal composition, liquid crystal device, display apparatus and display method
申请人:CANON KABUSHIKI KAISHA
公开号:EP0498277A1
公开(公告)日:1992-08-12
An optically active compound represented by the following formula (I):
wherein R₁ denotes a linear or branched alkyl group having 1 - 18 carbon atoms optionally including one or non-neighboring two or more methylene groups which can be replaced with -X- or
with the proviso that X denotes O or S and Y denotes halogen; R₂ denotes a linear alkyl group having 4 - 8 carbon atoms: and C* denotes an optically active asymmetric carbon atom. The mesomorphic compound is effective for providing a ferroelectric liquid crystal composition showing improved response characteristics and also effective for suppressing occurrence of reverse domain.
下式(I)所代表的光学活性化合物:
其中 R₁ 表示具有 1 - 18 个碳原子的直链或支链烷基,可选地包括一个或非邻接的两个或多个亚甲基,这些亚甲基可被 -X- 或 -X- 取代。
但条件是,X 表示 O 或 S,Y 表示卤素;R₂ 表示具有 4 - 8 个碳原子的直链烷基:C* 表示具有光学活性的不对称碳原子。介形态化合物可有效提供铁电液晶组合物,显示出更好的响应特性,还能有效抑制反向畴的出现。