申请人:The Secretary of State for Defence in Her Britannic Majesty's Government
公开号:US05578242A1
公开(公告)日:1996-11-26
Liquid crystal compounds of the formula: R.sup.1 --Z.sup.1).sub.m --(Z.sup.2)--X--(Z.sup.3)--(Z.sup.4).sub.n --R.sup.2 These compounds may be mixed with other liquid crystal compounds to give liquid crystal mixtures which may then be used in liquid crystal devices. In the formula X is COS, CSS and CSO; each of Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 are independently phenyl, substituted phenyl, where substitution is lateral substitution selected from F, Cl, Br, NO.sub.2, CN, NCS; naphthalene, substituted naphthalene, where substitution is lateral substitution selected from F, Cl, Br, NO.sub.2, CN, NCS, CH.sub.3 ; thiophene, pyridine and pyrimidine; each of A.sup.1 and A.sup.2 is independently selected from single bond, C.tbd.C, CH.dbd.CH; A.sup.3 is selected from C.tbd.C and single bond; each of R.sup.1 and R.sup.2 are independently selected from CN, NCS, CH.dbd.C(CN).sub.2, C.tbd.C--CN, C.tbd.C--CF.sub.3, alkyl, alkoxy, thioalkyl, alkenyl, and alkynyl; m and n are independently selected from 1 and 0, except where m and n are O, X is COS and each of R.sup.1 and R.sup.2 are selected from alkyl and alkoxy, A.sup.3 is a single bond and each of Z.sup.2 and Z.sup.3 is phenyl.
该公式的液晶化合物为:R.sup.1 --Z.sup.1).sub.m --(Z.sup.2)--X--(Z.sup.3)--(Z.sup.4).sub.n --R.sup.2。这些化合物可以与其他液晶化合物混合,形成液晶混合物,然后用于液晶器件。在公式中,X为COS、CSS和CSO;Z.sup.1、Z.sup.2、Z.sup.3和Z.sup.4中的每一个都是独立的苯基、取代苯基,其中取代是侧基取代,选择自F、Cl、Br、NO.sub.2、CN、NCS;萘、取代萘,其中取代是侧基取代,选择自F、Cl、Br、NO.sub.2、CN、NCS、CH.sub.3;噻吩、吡啶和嘧啶;A.sup.1和A.sup.2中的每一个都是独立选择自单键、C.tbd.C、CH.dbd.CH;A.sup.3选择自C.tbd.C和单键;R.sup.1和R.sup.2中的每一个都是独立选择自CN、NCS、CH.dbd.C(CN).sub.2、C.tbd.C--CN、C.tbd.C--CF.sub.3、烷基、烷氧基、硫代烷基、烯基和炔基;m和n独立选择自1和0,除非m和n都是O,X为COS且R.sup.1和R.sup.2中的每一个都选择自烷基和烷氧基,A.sup.3为单键,Z.sup.2和Z.sup.3中的每一个都是苯基。