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.
一种具有一般式M--(CH.sub.2).sub.n --(O).sub.m --[--D--B--].sub.q --Y的化合物(I),其中M表示具有2至5个硅原子的硅基,在桥接元素A的连接下彼此连接,硅原子的其余价与基团R饱和;A是从C.sub.1-到C.sub.8-烷基和氧中选择的桥接元素,但至少有一个M基团的A基团是C.sub.1-到C.sub.8-烷基;R表示选择性地被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,分支链C.sub.3-到C.sub.10-烷基或C.sub.3-到C.sub.10-烯基基团,选择性地被C.sub.1-到C.sub.4-烷基、C.sub.1-到C.sub.4-烷氧基、氟、氯、溴原子、氰、三氟甲基或硝基基团取代的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为3到12的整数;m为0或1;D表示异环或杂环饱和或不饱和5-或6-成员环;B表示从化学键、--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为1到3的整数;Y为氢原子或直链或分支链C.sub.1-到C.sub.10-烷基或C.sub.1-到C.sub.10-烷氧基或带有氢原子或取代的基团D,其中1或2个环取代基可以是C.sub.1-到C.sub.4-烷基、C.sub.1-到C.sub.4-烷氧基、氟、氯或溴原子、氰、三氟甲基或硝基基团,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。