The effect of substituent position upon unsymmetrical isomeric diarylethenes bearing a methoxy group
作者:Shouzhi Pu、Congbin Fan、Wenjuan Miao、Gang Liu
DOI:10.1016/j.dyepig.2009.06.018
日期:2010.1
coefficients of both of the open-ring and closed-ring isomers decreased when the methoxy group was attached at any of the three positions on the terminal benzene ring whereas the cycloreversion quantum yield gradually increased in going from the para- to meta- to the ortho-position of substitution. Oxidation waves were clearly observed at 0.55, 0.74 and 0.58 V from cyclic voltammograms for some compounds
合成了三个在一个末端苯环的对位,间位或邻位带有甲氧基的不对称异构体光致变色二硫杂环丁烷,并对其光学和电化学性质进行了研究。每种化合物在溶液中和在PMMA膜中均显示出高的光反应敏感性,并起着荧光光开关的作用。当甲氧基连接在末端苯环的三个位置中的任何一个上时,开环和闭环异构体的摩尔吸收系数均降低,而环还原量子产率从对位到间位逐渐增加。到邻取代位置。从循环伏安图可以清楚地在0.55、0.74和0.58 V处观察到某些化合物的氧化波,而在这些电压下则看不到其他化合物。