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.