申请人:——
公开号:US20040164273A1
公开(公告)日:2004-08-26
An optically active compound containing 5,5′,6,6′,7,7′,8,8′-octahydro-1,1′-bi-2-naphthol of the general formula (1) as an asymmetric source,
1
wherein n is an integer of 1 to 10, Y is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a phenyl group, a phenyl group substituted with an alkyl group having 1 to 5 carbon atoms or a phenyl group substituted with an alkoxy group having 1 to 4 carbon atoms, X is a single bond (−), —OOC— or —OCH
2
—, and each of A and B is a substituent formed by specifically combining rings selected from cyclohexane, benzene, pyrimidine, naphthalene, dioxane, etc., including mutual bonding forms of rings so that the substituent has 1 to 4 rings, the optically active compound characteristically having a large helical twisting power (HTP) of 50 or more and being useful as a chiaral dopant, the chiral dopant being capable of adjusting a helical pitch when only added in a small amount, so that the deterioration of performances of a base liquid crystal can be prevented.
一种光学活性化合物,含有通式(1)的 5,5′,6,6′,7,7′,8,8′-八氢-1,1′-联-2-萘酚作为不对称源、
1
其中 n 是 1 至 10 的整数,Y 是氢原子、1 至 5 个碳原子的烷基、苯基、被 1 至 5 个碳原子的烷基取代的苯基或被 1 至 4 个碳原子的烷氧基取代的苯基,X 是单键 (-)、-OOC- 或 -OCH
2
-A和B中的每一个都是由选自环己烷、苯、嘧啶、萘、二噁烷等的环特别组合而成的取代基、包括环的相互结合形式,从而使取代基具有 1 至 4 个环;光学活性化合物通常具有 50 或更高的大螺旋扭曲力(HTP),可用作手性掺杂剂;手性掺杂剂只需少量添加即可调节螺旋间距,从而防止基液晶性能下降。