Synthesis and the effect of substituent position upon unsymmetrical isomeric diarylethenes bearing a pyrrole unit
作者:Gang Liu、Shouzhi Pu、Xiaomei Wang
DOI:10.1016/j.jphotochem.2010.07.001
日期:2010.8
moiety were synthesized, and the structures of two isomeric compounds were determined by single-crystal X-ray diffraction analysis. The properties of these compounds, including photochromism, fluorescence and electrochemical properties of these diarylethenes were also investigated systematically. Each of the four diarylethene derivatives exhibited good photochromism and functioned as an effective fluorescent
合成了四个带有吡咯部分的不对称二芳烃,并通过单晶X射线衍射分析确定了两种异构体的结构。还系统地研究了这些化合物的性质,包括这些二芳烃的光致变色,荧光和电化学性质。四种二芳基乙烯衍生物中的每一种均表现出良好的光致变色性,并且在溶液和PMMA膜中均起有效的荧光光开关作用。当在末端苯环的三个位置上的任何一个上连接甲氧基时,最大吸收率,环化和环还原的量子产率以及开环异构体的荧光量子产率增加,而发射峰明显减少。与带有吡唑部分的类似二芳烃相比,吡咯部分的引入可以增加吸收最大值,并显着降低环回复量子产率。循环伏安图证实,甲氧基及其取代位置可有效调节这些二芳基乙烯衍生物的电化学行为。