A mesomorphic compound represented by the following formula (I):
wherein R1 and R2 respectively denote a linear or branched alkyl group having 1 - 18 carbon atoms capable of including one or two or more non-neighboring methylene groups which can be replaced with -O-, -S-,
-CH = CH-, -C≡C- or
wherein X denotes halogen; X1 and X2 respectively denote
Z, denotes
or -CH20-; A1 denotes a single bond,
and Y1 and Y2 respectively denote H, F, Cl, Br, -CH3 or -CF3 with the proviso that Y, and Y2 are not simultaneously H. The mesomorphic compound is effective for providing a ferroelectric liquid crystal composition showing an improved low-temperature operation characteristic and a decreased temperature-dependence of response speed.
由下式(I)代表的中间体化合物:
其中 R1 和 R2 分别表示具有 1 - 18 个碳原子的直链或支链烷基,可包括一个或两个或多个非邻位亚甲基,这些亚甲基可被 -O-、-S-、
-CH=CH-、-C≡C-或
其中 X 表示卤素;X1 和 X2 分别表示
Z,表示
或-CH20-;A1 表示单键、
该介形化合物可有效提供一种
铁电液晶组合物,其低温工作特性得到改善,响应速度的温度依赖性降低。