含席夫碱基的螺噁嗪类光致变色化合物的合成及性质

设计合成了一系列含席夫碱基的螺噁嗪双功能光致变色材料4a~4d. 通过¹H NMR, ¹³C NMR, IR和HRMS对其结构进行了表征. 新化合物在几种有机溶剂中均表现出了良好的光致变色性. 研究了化合物在几种高分子膜中的光致变色性. 比较了化合物4b的开环体在两种不同溶剂, 即甲醇和二甲亚砜, 以及3种高分子介质, 即聚甲基丙烯酸甲酯(PMMA)、聚乙烯醇缩丁醛(PVB)和聚乙烯醇(PVA)中的消色速率. 研究了化合物在甲醇、二甲亚砜、PMMA及PVB中的消色过程动力学, 根据化合物在溶液中和高分子介质中开环体消色过程的差别, 推测了存在两种动力学解释的原因. 研究结果显示, 化合物4d在PMMA膜中的耐疲劳度良好.

Synthesis and Properties of Novel Photochromic Dyads Based on Spirooxazine and Schiff Base

A series of novel photochromic compounds(4a—4d) based on spirooxazine and Schiff base residue were synthesized. Their structures were characterized by 1H NMR, 13C NMR, IR, and HRMS. The compounds were proved by UV testing to have excellent photochromic properties both in organic solutions and polymer films. The compounds(4a—4d) have shorter photoresponsive time and better photosensitivity than parent compound 3. We have also studied the kinetics of the thermal decay process of the representative compound 4b in methanol, DMSO, and several kinds of films, and presumed why there are two kinds of explains about the kinetics of the thermal decay process in the recent years. The representative compound 4d shows a good fatigue resistance. The applications of compounds 4a—4d in photo-fluorescent and photo-magnetic switch area are under investigation.