作者:Lixia Cui、Honghong Zhang、Guomei Zhang、Ying Zhou、Li Fan、Lihong Shi、Caihong Zhang、Shaomin Shuang、Chuan Dong
DOI:10.1016/j.saa.2018.04.076
日期:2018.9
Spiropyran compounds are well known as an isomeric system, the closed spiropyran (SP) could be converted into the open merocyanine (MC) via acid-induced because stable protonated merocyanine (MCH) were formed by combination of MC and H+. In order to understand how the substituent affect the isomerization of spiropyran. A series of the chromene 7-subsituted spiropyran compounds were designed and synthesized
螺吡喃化合物是众所周知的异构体系统,封闭的螺吡喃(SP)可以通过酸诱导转化为开式的花菁(MC),因为稳定的质子化的花菁(MCH)是由MC和H +结合形成的。为了了解取代基如何影响螺吡喃的异构化。设计并合成了一系列色烯7取代的螺并吡喃化合物。通过不同pH下的紫外吸收和荧光光谱对它们的光物理性质进行了比较研究。结果表明,各种取代基不仅影响SP,MC和MCH形式的光物理性质,而且影响MC-MCH转化的p K a。p K之间存在良好的线性关系a和取代基的哈米特常数,当取代基的哈米特常数较大时,p K a较小。