Liquid crystal compounds having a silane tail with a perfluoroalkyl terminal portion
申请人:——
公开号:US20030003245A1
公开(公告)日:2003-01-02
Chiral nonracemic, chiral racemic and achiral compounds useful as component of LC compositions which have a silane tail group which is partially fluorinated. The silane tail group comprises a perfluoroalkyl group. The silane tail group of this invention has the formula:
1
where k is 0 or an integer ranging from 1-10; m and n are integers ranging from 1 to about 20; j is 0 or an integer ranging from 1 to 20; Z is —O— or a single bond; R
1
, R
1′
, R
2
and R
2′
are alkyl groups or perfluorinated alkyl groups; and R
F
is a perfluorinated alkyl group. The invention also provides LC compositions comprising one or more compounds of the invention with partially fluorinated silane tails. The invention also provides optical devices, particularly display devices which contain an aligned layer of an LC composition comprising one or more silane compounds of this invention.
手性非外消旋、手性外消旋和非手性化合物可用作液晶组成部分,其具有部分氟化的硅烷尾基。硅烷尾基包括全氟烷基。本发明的硅烷尾基的化学式为:其中k为0或1-10的整数;m和n为1-20的整数;j为0或1-20的整数;Z为—O—或单键;R1、R1'、R2和R2'为烷基或全氟烷基;RF为全氟烷基。本发明还提供了包含一种或多种具有部分氟化硅烷尾基的本发明化合物的液晶组成物。本发明还提供了光学器件,特别是包含本发明的一种或多种硅烷化合物的液晶组成物的定向层的显示器件。