申请人:Consortium fur elektrochemische Industrie GmbH
公开号:US05399290A1
公开(公告)日:1995-03-21
A compound of the general formula M--(CH.sub.2).sub.n --(O).sub.m --[--D--B--].sub.q --Y, (I) in which M represents a silicon radical having 2 to 5 silicon atoms which are linked together by bridging elements A, and the remaining valencies of the silicon atoms are saturated with radicals R; A is a bridging element selected from the group consisting of C.sub.1 - to C.sub.8 -alkylene radicals and oxygen with the proviso that at least one radical A per M radical is a C.sub.1 - to C.sub.8 -alkylene radical; R represents optionally fluorine or chlorine atom- or cyano group-substituted straight-chain C.sub.1 - to C.sub.10 -alkyl or C.sub.2 - to C.sub.10 -alkenyl radicals, branched chain C.sub.3 - to C.sub.10 -alkyl or C.sub.3 - to C.sub.10 -alkenyl radicals, optionally C.sub.1 - to C.sub.4 -alkyl- , C.sub.1 - to C.sub.4 -alkoxy radicals, fluorine, chlorine, bromine atom, cyano, trifluoromethyl or nitro radical substituted C.sub.6 - to C.sub.12 -cycloalkyl, C.sub.6 - to C.sub.12 -cycloalkenyl, C.sub.6 - to C.sub.12 -alkylcycloalkyl, C.sub.6 - to C.sub.12 -alkylcycloalkenyl, C.sub.6 - to C.sub.12 -aryl or C.sub.6 - to C.sub.12 -aralkyl radicals; n is an integer of from 3 to 12; m is 0 or 1; D represents isocyclic or heterocyclic saturated or unsaturated 5- or 6-membered rings; B represents a linking group selected from the group consisting of a chemical bond, a --COO--, --OOC--, --CH.sub.2 --CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --CH.dbd.N--, --N.dbd.CH--, --CH.sub.2 --O--, --O--CH.sub.2 -- and --N.dbd.N-- group; q is an integer of from 1 to 3; Y is a hydrogen atom or a straight-chain or branched chain C.sub.1 - to C.sub.10 -alkyl or C.sub.1 - to C.sub.10 -alkoxy group or a radical D which is provided with a hydrogen atom or substituted, in which 1 or 2 ring substituents may be C.sub.1 - to C.sub.4 -alkyl, C.sub.1 - to C.sub.4 -alkoxy radicals, fluorine, chlorine or bromine atoms, cyano, trifluoromethyl or nitro radicals, or a cholesteryl radical. These compounds are liquid crystals and can be employed alone or in admixture with other liquid crystals.
一种一般式为M--(CH.sub.2).sub.n --(O).sub.m --[--D--B--].sub.q --Y(I)的化合物,其中M代表具有2至5个硅原子的硅基团,这些硅原子由桥接元素A连接在一起,硅原子的剩余价通过基团R饱和;A是从C.sub.1 -到C.sub.8 -烷基链和氧中选择的桥接元素,但至少每个M基团中的一个基团A是C.sub.1 -到C.sub.8 -烷基链;R代表可选的氟或氯原子或氰基取代的直链C.sub.1 -到C.sub.10 -烷基或C.sub.2 -到C.sub.10 -烯基基团,支链C.sub.3 -到C.sub.10 -烷基或C.sub.3 -到C.sub.10 -烯基基团,可选的C.sub.1 -到C.sub.4 -烷基-,C.sub.1 -到C.sub.4 -烷氧基团,氟,氯,溴原子,氰基,三氟甲基或硝基取代的C.sub.6 -到C.sub.12 -环烷基,C.sub.6 -到C.sub.12 -环烯基,C.sub.6 -到C.sub.12 -烷基环烷基,C.sub.6 -到C.sub.12 -烷基环烯基,C.sub.6 -到C.sub.12 -芳基或C.sub.6 -到C.sub.12 -芳基烷基基团;n是3到12的整数;m为0或1;D代表异环或杂环饱和或不饱和的5-或6-成员环;B代表从化学键,--COO--,--OOC--,--CH.sub.2 --CH.sub.2 --,--CH.dbd.CH--,--C.tbd.C--,--CH.dbd.N--,--N.dbd.CH--,--CH.sub.2 --O--,--O--CH.sub.2 --和--N.dbd.N--基团中选择的连接基团;q是1到3的整数;Y是氢原子或直链或支链C.sub.1 -到C.sub.10 -烷基或C.sub.1 -到C.sub.10 -烷氧基团或带有氢原子或取代的基团D,其中1或2个环取代基可能是C.sub.1 -到C.sub.4 -烷基,C.sub.1 -到C.sub.4 -烷氧基团,氟,氯或溴原子,氰基,三氟甲基或硝基,或胆固醇基团。这些化合物是液晶,可以单独使用或与其他液晶混合使用。