申请人:Showa Shell Sekiyu Kabushiki Kaisha
公开号:EP0468882A1
公开(公告)日:1992-01-29
The invention discloses optically active liquid crystal compounds represented by the formulas [I], [II] and [III]:
wherein R₁ and R₂ each represents an alkyl group of 4 - 18 carbon atoms, X represents O, COO or a single bond, and (A), (B), (C), (D) and (E) each
in which ℓ represents a halogen.
The invention further discloses optically active liquid crystal compounds which are able to exhibit tristable states, represented by the formulas [IV], [V] and [VI]:
wherein R₁′ and R₂′ each represents a straight chain alkyl group of 5 - 16 carbon atoms, X′ represents O or COO and (A), (B), (C), (D) and (E), and ℓ each has the same meaning as above.
本发明公开了由式[I]、[II]和[III]表示的光学活性液晶化合物:
其中 R₁ 和 R₂ 各自代表 4 - 18 个碳原子的烷基,X 代表 O、COO 或单键,以及 (A)、(B)、(C)、(D) 和 (E) 各自
其中 ℓ 代表卤素。
本发明进一步公开了能够呈现三稳态的光学活性液晶化合物,由式[IV]、[V]和[VI]表示:
其中R₁′和R₂′各自代表5-16个碳原子的直链烷基,X′代表O或COO,(A)、(B)、(C)、(D)和(E)以及ℓ各自具有与上述相同的含义。