申请人:Displaytech, Inc.
公开号:US05380460A1
公开(公告)日:1995-01-10
Chiral, nonracemic compounds of the general formula: ##STR1## wherein m and n are either both zero, both equal one or n is equal to one and m is equal to zero, X and Y and Z are halogens, R' is an alkyl, alkoxyl, alkenyl, thioalkyl, thioether, ether, or alkylsilyl group containing three to fifteen carbon atoms, and R is an alkyl group having one to fifteen carbon atoms and where Ar is: --A.sub.a --(E).sub.e --B.sub.b --(F).sub.f --D.sub.d -- where A, B and D independently of one another are aromatic rings which are selected from the group consisting of a phenyl, a pyridine ring, a pyrimidine ring, a pyridizine ring, a pyrazine ring and a thiadiazole ring, wherein a, b and d are integers from 0-3 such that a+b+d=2-3, where E and F independently of one another are linking groups selected from the group consisting of a --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --O--, --CH.sub.2 --S--, --O--CH.sub.2 --, --S--CH.sub.2, --OOC-- or --COO-- wherein e and f can be 1 or 0, when e and/or f is 0, the adjacent aromatic rings are linked by a carbon-carbon single bond, preferably e and f are both 0 or one of e or f is 1, and wherein * indicates a chiral center, which are useful as ferroelectric liquid crystal components having high polarization are described.
通用公式为:##STR1## 其中m和n要么都是零,要么都等于一,要么n等于一且m等于零,X、Y和Z是卤素,R'是含有三至十五个碳原子的烷基、烷氧基、烯基、硫代烷基、硫醚、醚或烷基硅基团,R是具有一至十五个碳原子的烷基,其中Ar是:--A.sub.a --(E).sub.e --B.sub.b --(F).sub.f --D.sub.d -- 其中A、B和D彼此独立地是芳香环,选自苯环、吡啶环、嘧啶环、吡啉啉环、吡嗪环和噻二唑环的群,其中a、b和d是0-3的整数,使得a+b+d=2-3,E和F彼此独立地是选自--CH.sub.2 --CH.sub.2 --、--CH.sub.2 --O--、--CH.sub.2 --S--、--O--CH.sub.2 --、--S--CH.sub.2、--OOC--或--COO--的连接基团,其中e和f可以是1或0,当e和/或f为0时,相邻的芳香环通过碳-碳单键连接,最好e和f都是0或e或f中的一个是1,*表示手性中心,这些化合物可用作具有高极化度的铁电液晶组分。