申请人:Merck Patent Gesellschaft Mit Beschrankter Haftung
公开号:US05204019A1
公开(公告)日:1993-04-20
4-Q.sup.1 -4'-Q.sup.2 -2,3-Difluorobiphenyls wherein Q.sup.1 and Q.sup.2 independently of one another are each R or R-A.sup.1 -A.sup.2 -Z in which R (sic) alkyl having 1-15 C atoms or alkenyl having 3-15 C atoms each of which is unsubstituted or monosubstituted by cyano or at least monosubstituted by fluorine or chlorine, and in which in each case one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, --CO--, --O--CO, --CO--O-- or --O--COO--, (sic) --COO--, --O--CO--, --CH.sub.2 O, --O--CH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond, and A.sup.1 and A.sup.2 independently of one another . . (sic) each 1,4-phenylene which is unsubstituted or substituted by one or two fluorine atoms, and in which one or two CH groups can also be replaced by N, or trans-1,4-cyclohexylene wherein one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, and one of the two groups A.sup.1 and A.sup.2 can also be a single bond, subject to the proviso that Z is --CO--O, --O--CO--, --CH.sub.2 O--, --OCH.sub.2 -- or --CH.sub.2 CH.sub.2 --, if one of the groups Q.sup.1 or Q.sup.2 is alkyl or alkoxy and the other group Q.sup.1 or Q.sup.2 is R-A.sup.1 -A.sup.2 -Z wherein one of the two groups A.sup.1 and A.sup.2 is a single bond, are suitable for use as components of liquid-crystal media.
4-Q.sup.1 -4'-Q.sup.2 -2,3-二氟联苯,其中Q.sup.1和Q.sup.2独立地是R或R-A.sup.1-A.sup.2-Z,其中R是具有1-15个碳原子的烷基或具有3-15个碳原子的烯基,每个原子未被取代或单取代为氰基或氟或氯的取代基,并且在每种情况下,一个或两个非相邻的CH.sub.2基团也可以被--O--, --CO--, --O--CO, --CO--O--或--O--COO--, --COO--, --O--CO--, --CH.sub.2 O, --O--CH.sub.2 --, --CH.sub.2 CH.sub.2 --或单键所取代,而A.sup.1和A.sup.2独立地为未被取代或取代了一个或两个氟原子的1,4-苯基,其中一个或两个CH基团也可以被N所取代,或者是trans-1,4-环己烷基,其中一个或两个非相邻的CH.sub.2基团也可以被--O--所取代,而且A.sup.1和A.sup.2中的两个基团中的一个也可以是单键,但须满足Z为--CO--O,--O--CO--,--CH.sub.2 O--,--OCH.sub.2--或--CH.sub.2 CH.sub.2--,如果Q.sup.1或Q.sup.2中的一个基团为烷基或烷氧基,而另一个基团Q.sup.1或Q.sup.2为R-A.sup.1-A.sup.2-Z,其中A.sup.1和A.sup.2中的一个为单键,则适用于作为液晶介质成分。