Rapid fading of 3H-naphtho[2,1-b]pyrans with protonation of N,N-disubstituted group
作者:Shulie Han、Yi Chen
DOI:10.1039/c1jm11267h
日期:——
We present the rapid fading of photochromic 3H-naphtho[2,1-b]pyrans at ambient temperature by protonation of N,N-disubstituted group. It is found that photochromic 3H-naphtho[2,1-b]pyrans with a N,N-disubstituted group are converted to protonated 3H-naphtho[2,1-b]pyran by treatment with acid, and the protonated 3H-naphtho[2,1-b]pyrans show rapid fading in both solution and a rigid polymer matrix at ambient temperature. It is also found that the protonated 3H-naphtho[2,1-b]pyrans exhibit similar absorption and fatigue resistance compared to their original compounds.
我们通过N,N-二取代基的质子化作用,展示了光致变色3H-萘并[2,1-b]吡喃在室温下的快速褪色现象。研究发现,含有N,N-二取代基的光致变色3H-萘并[2,1-b]吡喃在酸处理下转化为质子化的3H-萘并[2,1-b]吡喃,这些质子化的3H-萘并[2,1-b]吡喃在溶液和刚性聚合物基质中均在室温下表现出快速褪色。同时,质子化的3H-萘并[2,1-b]吡喃与其原始化合物相比,显示出相似的吸收特性和抗疲劳性能。