Photochromism of new unsymmetrical isomeric diarylethenes bearing a methoxyl group
作者:Shouzhi Pu、Weijun Liu、Wenjuan Miao
DOI:10.1002/poc.1545
日期:2009.10
substituent position effect of methoxyl group on their properties, including photochromism and fluorescence both in hexane solution and in PMMA film, and their electrochemical properties, were investigated in detail. These diarylethenes showed good photochromism both in solution and in PMMA film. For the same photochromic diarylethene backbone, the electron‐ donating methoxyl substituent can effectively
在末端苯环的邻位,间位和对位具有甲氧基取代基的三个新的不对称异构二芳烃,即1-(2,5-二甲基-3-噻吩基)-2- [2-甲基-5- (2-甲氧基苯基)-3-噻吩基]全氟环戊烯(1o),1-(2,5-二甲基-3-噻吩基)-2- [2-甲基-5-(3-甲氧基苯基)-3-噻吩基]全氟环戊烯(2o)和1-(2,5-二甲基-3-噻吩基)-2- [2-甲基-5-(4-甲氧基苯基)-3-噻吩基]全氟环戊烯(3o),已经合成。详细研究了甲氧基的取代基位置对其性能的影响,包括在己烷溶液和PMMA膜中的光致变色和荧光以及它们的电化学性能。这些双芳烃在溶液和PMMA膜中均显示出良好的光致变色性。对于相同的光致变色二芳基乙烯主链,与先前报道的带有氯原子的二芳烃相比,给电子的甲氧基取代基可以有效地降低环化量子产率并提高环还原量子产率。二芳烃1o – 3o通过在己烷和PMMA膜中进行光辐照显示出清晰的荧光开关。此外