| 摘要 |
Compounds of formula (I) may be used as alignment layers in liquid crystal devices wherein X1-5 are idependently selected from H, F, CN, phenylene, C1-10 alkyl, whereby when X1=X2, then X1,2=H and when X3=X4, then X3,4=H, S1-3 are spacer units, PG1-3 are photoisomerisable/dimerisable groups. |
