申请人:Displaytech, Inc.
公开号:US05626792A1
公开(公告)日:1997-05-06
High birefringence liquid crystal dopants having the formula: R.sub.1 X--C--.tbd.--D--T wherein C and D, independently of one another, are aromatic ring systems each of which has one or two 5-member or 6-member carbon rings wherein one or two carbons of any ring in C or D can be substituted with a nitrogen, oxygen or sulfur atom and wherein any ring in C or D can be substituted with one or two halogen atoms; T is a halogen, haloalkyl, haloalkoxy, vinylhalide or a group YR.sub.2 where Y is a single bond, double bond, triple bond, --COS--, --CS.sub.2 --, --CH.dbd.CH--CO--S--, --CH.dbd.CH--CS--S-- or --CH.dbd.CH--CO--O-- group; X is a single bond, double bond, triple bond, O or S atoms or a cyclohexane or cyclohexene group, Z--Q--W, where Q is a cyclohexane or cyclohexene ring in which one or two of the ring carbons can be replaced with an O atom or in which one or more of the ring carbons can be substituted with a halogen atom or a cyano group, Z is a single bond or an O or S atom and W is a single bond, a --CH.sub.2 -- group, a --CH2--CH.sub.2 -- group, or a --CH.sub.2 --O-- group; and R.sub.l and R.sub.2 are, independently of one another, alkyl groups having from about 3 to about 20 carbon atoms in which one or more --CH.sub.2 -- groups can be halogenated, two neighboring --CH.sub.2 -- groups can be substituted with an epoxide, or one or more non-neighboring --CH.sub.2 -- groups can be substituted with a double bond, triple bond, an O atom, a S atom, or a silyl group SiR.sub.A R.sub.B wherein R.sub.A and R.sub.B, independently of one another, can be alkyl or alkenyl groups having 1 to about 6 carbon atoms are provided. More specifically, high birefringence dopants that are alkynyl tolanes dialkynyl tolanes and tolanes having cinnamate ester tails and derivatives of those tails are provided. High birefringence dopants also possess UV stability, IR clarity and other properties that affect LC properties.
具有以下公式的高双折射液晶掺杂剂:R.sub.1 X--C--.tbd.--D--T,其中C和D互相独立,均为含有一个或两个5元或6元碳环的芳香环系统,其中C或D中任何一个环中的一个或两个碳可以被氮、氧或硫原子取代,C或D中的任何环都可以被一个或两个卤素原子取代;T为卤素、卤代烷基、卤代氧基、乙烯卤代物或YR.sub.2基团,其中Y为单键、双键、三键、--COS--、--CS.sub.2--、--CH.dbd.CH--CO--S--、--CH.dbd.CH--CS--S--或--CH.dbd.CH--CO--O--基团;X为单键、双键、三键、O或S原子或环己烷或环己烯基团,Z-Q-W,其中Q为环己烷或环己烯环,其中一个或两个环碳可以被氧原子取代,其中一个或多个环碳可以被卤素原子或氰基取代,Z为单键或O或S原子,W为单键、--CH.sub.2--基团、--CH2--CH.sub.2--基团或--CH.sub.2--O--基团;R.sub.1和R.sub.2互相独立,均为具有约3到约20个碳原子的烷基,其中一个或多个--CH.sub.2--基团可以被卤代,两个相邻的--CH.sub.2--基团可以被环氧化物取代,或者一个或多个非相邻的--CH.sub.2--基团可以被双键、三键、O原子、S原子或硅基团SiR.sub.A R.sub.B取代。更具体地,提供了具有炔基托兰、双炔基托兰和具有肉桂酸酯尾巴及其衍生物的高双折射掺杂剂。高双折射掺杂剂还具有UV稳定性、IR透明度和其他影响LC性能的特性。