Mesomorphic compound, liquid crystal composition, liquid crystal device, display apparatus and display method
申请人:CANON KABUSHIKI KAISHA
公开号:EP0474196A1
公开(公告)日:1992-03-11
A mesomorphic compound represented by the following formula (I):
wherein R₁ denotes a linear or branched alkyl group having 1 - 18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of -X-,
-CH=CH- and -C≡C- with the proviso that X denotes O or S and Y denotes halogen; R₂ denotes a linear or branched alkyl group having 1 - 18 carbon atoms; A, B and D independently denote
wherein Z₁ and Z₂ independently denote hydrogen, halogen, -CH₃, -CN or -CF₃; E denotes -CH₃, -CH₂F or -CH₃; and f and g independently denote 0 or 1. The mesomorphic compound is effective for providing a ferroelectric liquid crystal composition showing an improved response speed and also effective for suppressing occurrence of reverse domain.
下式(I)所代表的中间体化合物:
其中 R₁ 表示具有 1-18 个碳原子的直链或支链烷基,可包括一个或非邻接的两个或多个亚甲基,这些亚甲基可被至少一种 -X- 取代、
-CH=CH-和-C≡C-,但 X 表示 O 或 S,Y 表示卤素; R₂ 表示具有 1-18 个碳原子的直链或支链烷基; A、B 和 D 独立地表示
其中 Z₁ 和 Z₂ 独立地表示氢、卤素、-CH₃、-CN 或 -CF₃;E 表示 -CH₃、-CH₂F 或 -CH₃;f 和 g 独立地表示 0 或 1。介形态化合物可有效提供铁电液晶组合物,提高反应速度,还能有效抑制反向畴的出现。