Disclosed is a liquid crystal material represented by the following formula [I]:
R-X-A¹-Y¹-A²- (Y²-A³)n-Z-R* [I]
wherein R is an alkyl or polyfluoroalkyl group; X is a group such as -COO-, or a single bond; n is 0 or 1; A¹, A² and A³ are each a cyclic group such as tetralin, and at least one of them has an optically active group; Y¹ and Y² are each a group such as -COO-; Z is a group such as -O-, or a single bond; and R* is an optically active group. Also disclosed are a liquid crystal composition comprising the liquid crystal material represented by the above formula, and a liquid crystal element in which the liquid crystal material is used. The liquid crystal material of the invention shows excellent liquid crystal characteristics because it has at least two optically active groups.
本发明公开了由下式[I]表示的液晶材料:
R-X-A¹-Y¹-A²- (Y²-A³)n-Z-R* [I].
其中 R 是烷基或多氟烷基;X 是-COO-等基团或单键;n 是 0 或 1;A¹、A² 和 A³ 分别是四氢
萘等环状基团,且其中至少一个具有光学活性基团;Y¹ 和 Y² 分别是-COO-等基团;Z 是-O-等基团或单键;以及 R* 是光学活性基团。本发明还公开了一种液晶组合物,该组合物包含由上式表示的液晶材料,以及一种使用了该液晶材料的液晶元件。本发明的液晶材料具有至少两个光学活性基团,因此具有优异的液晶特性。