A silacyclohexane compound, a method of preparing it and a liquid crystal composition containing it
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP0670322A1
公开(公告)日:1995-09-06
A silacyclohexane compound represented by the following general formula (I):
wherein R denotes a linear-chain alkyl group with a carbon number of 1-10, a fluoroalkyl group with a carbon number of 1-10 in which a fluorine atom(s) is substituted for one or two hydrogen atoms, an alkoxy group, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, or an alkenyl group with a carbon number of 2-8; and a and b denote 0 or 1 and (a+b)=0 or 1 ;
at least one of the groups:
and
denotes a trans-1-sila-1,4-cyclohexylene or a trans-4-sila-1,4-cyclohexylene group whose silicon at position 1 or position 4 comprises substitutional group(s) selected from H, F, Cl or CH₃; X denotes H, CN, F, Cl, CF₃, CF₂Cl, CHFCl, OCF₃, OCF₂Cl, OCHFCl, OCHF₂, R or OR; Y and Z denote F, Cl or CH₃; and i and j denote 0, 1 or 2, a liquid crystal composition containing said compound and a liquid crystal display element containing said liquid crystal composition.
由以下通式 (I) 代表的
硅环己烷化合物:
其中 R 表示碳原子数为 1-10 的直链烷基、碳原子数为 1-10 的氟烷基(其中一个或两个
氟原子被一个或两个氢原子取代)、烷氧基、碳原子数为 3-8 的支链烷基、碳原子数为 2-7 的烷氧基或碳原子数为 2-8 的烯基;a 和 b 表示 0 或 1,(a+b)=0 或 1;
至少一个基团:
和
X 表示 H、CN、F、Cl、CF₃、CF₂Cl、CHFCl、OCF₃、OCF₂Cl、OCHFCl、OCHF₂、R 或 OR;Y 和 Z 表示 F、Cl 或 CH₃;i 和 j 表示 0、1 或 2、含有所述化合物的液晶组合物和含有所述液晶组合物的液晶显示元件。