申请人:ASAHI GLASS COMPANY LTD.
公开号:EP1637573A1
公开(公告)日:2006-03-22
A novel photochromic liquid crystal comprising a diarylethene compound having both photochromic properties and liquid crystallinity. This compound is a photochromic diarylethene compound having a mesogen group in each of the two aryl groups.
The photochromic liquid crystal provides a large change in birefringence by photoisomerization or phase transition, and has high durability against repeated changes in birefringence.
A side-chain polymer liquid crystal containing the above photochromic liquid crystal is useful as an optical recording material. Such an optical recording material is capable of performing light modulation by irradiation with light near Tc thereof, and is applicable to photo operator devices, optical memories, and the like. Further, the optical recording material is useful as a material for a recording layer of an optical recording medium such as an optical disk or an optical memory card.
一种新型光致变色液晶,由一种同时具有光致变色特性和液晶性质的二元乙烯化合物组成。这种化合物是一种光致变色二芳基烯化合物,在两个芳基中各有一个中间基团。
这种光致变色液晶可通过光异构化或相变使双折射发生较大变化,并对双折射的反复变化具有较高的耐久性。
含有上述光致变色液晶的侧链聚合物液晶可用作光学记录材料。这种光学记录材料能够通过照射其 Tc 附近的光来进行光调制,适用于光电操作器件、光学存储器等。此外,这种光学记录材料还可用作光盘或光学存储卡等光学记录介质的记录层材料。