Liquid crystal compound, liquid crystal composite including the compound and liquid crystal device utilizing the composite
申请人:CANON KABUSHIKI KAISHA
公开号:EP0435106A2
公开(公告)日:1991-07-03
There is provided a liquid crystal compound represented by the following general formula (I), a liquid crystal composite including at least one kind of above liquid crystal compound and a liquid crystal device in which the liquid crystal composite is disposed between a pair of electrode substrates.
In the above formula (I), R1 is a straight chain alkyl having 1-12 carbon atoms. R2 is a straight chain or branched chain alkyl, which may have a substituted radical, having 1-18 carbon atoms and in which one or more than two methylene, which do not adjoin, may be substituted by -Y-,
Y is 0 or S. A is -A1- or -A1-A2-, and B is -B1- or -B1-B2-. A1, A2, B1 , and B2 each is selected from
and a single bond. Z is hydrogen, halogen, cyano or methyl. X, is a single bond when A is a single bond and is -CH20-,
in other cases. n is 0 or 1, X2 is
-OCH2- or -CH20, and D is a single bond,
and * designates an asymmetric carbon atom.
本发明提供了一种由以下通式(I)表示的液晶化合物,一种包括至少一种上述液晶化合物的液晶复合材料,以及一种将液晶复合材料置于一对电极基板之间的液晶装置。
在上述式(I)中,R1 是具有 1-12 个碳原子的直链烷基。R2 是具有 1-18 个碳原子的直链或支链烷基,其中一个或两个以上不相邻的亚甲基可被 -Y- 取代、
A 是-A1-或-A1-A2-,B 是-B1-或-B1-B2-。A1、A2、B1 和 B2 分别选自
和单键。Z 是氢、卤素、氰基或甲基。当 A 为单键且为-CH20-时,X 为单键、
n 是 0 或 1,X2 是
-或-CH20,D 是单键、
表示不对称碳原子。