申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US05318721A1
公开(公告)日:1994-06-07
The invention relates to the use of trifluorotoluene derivatives of the formula I ##STR1## in which R.sup.1 is alkyl having 1 to 12 carbon atoms in which, in addition, one or more non-neighboring CH.sub.2 groups may be replaced by --O--, --CO--, --O--CO--, --CO--O--, --O--CO--O--, --CH-halogen, --CH--CN-- and/or --CH.dbd.CH--, A.sup.1 and A.sup.2, in each case independently of one another, are 1,4-phenylene in which, in addition, one or more CH groups may be replaced by N, trans-1,4-cyclohexylene in which, in addition, one or two non-neighboring CH.sub.2 groups may be replaced by --O-- and/or --S--, or 1,4-bicyclo(2,2,2)octylene, each of which is unsubstituted or monosubstituted or polysubstituted by halogen, nitrile and/or CH.sub.3, Z.sup.1 and Z.sup.2, in each case independently of one another, are --CO--O--, --O--CO--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond, and n is 0 or 1, as components of chiral tilted smectic phases.
本发明涉及使用式I的三
氟甲基苯衍
生物,其中R1是具有1到12个碳原子的烷基,此外,一个或多个非相邻的
CH2基团可以被--O--,--CO--,--O--CO--,--CO--O--,--O--CO--O--,--CH-卤素,--CH--CN--和/或--CH.dbd.CH--所取代。A1和A2分别独立地是1,4-苯撑基,其中一个或多个CH基团可以被N所取代,是反-1,4-环己撑基,其中一个或两个非相邻的 基团可以被--O--和/或--S--所取代,或者是1,4-双环(2,2,2)辛撑基,每个基团均未取代或单取代或多取代为卤素,腈和/或
CH3,Z1和Z2分别独立地是--CO--O--,--O--CO--,-- O--,--O --,-- --或单键,并且n为0或1,作为手性倾斜的液晶相的组分。