作者:Sayo Fukumoto、Tetsuya Nakagawa、Shigekazu Kawai、Takuya Nakashima、Tsuyoshi Kawai
DOI:10.1016/j.dyepig.2010.04.004
日期:2011.6
A series of diaryl acenaphthylenes has been synthesized, and their photochromic properties are studied both in solution and in the crystalline state. 2,4-Dimethyl-5-phenylthiophene derivative 1a showed no photochromic reaction, while 2-methyl-5-phenylthiophene derivative 2a and 5-methyl-2-phenylthiazol derivative 3a showed reversible photochromism in solution. Fluorescence spectrum of compound 3a changed
合成了一系列二芳基,并在溶液和结晶状态下研究了它们的光致变色特性。2,4-二甲基-5-苯基噻吩衍生物1a没有光致变色反应,而2-甲基-5-苯基噻吩衍生物2a和5-甲基-2-苯基噻唑衍生物3a在溶液中表现出可逆的光致变色。化合物3a的荧光光谱在光照射后发生变化。在单晶状态下,化合物3a没有显示光致变色反应,可能是由于π-π和CH / S分子间的相互作用。经测定,3a的光环化量子产率低至0.7%。封闭异构体3b 通过a庚啶的刚性显示出相对较高的热稳定性。