Study on Photochromism of Diarylethenes with a 2,5-Dihydropyrrole Bridging Unit: A Convenient Preparation of 3,4-Diarylpyrroles from 3,4-Diaryl-2,5-dihydropyrroles
作者:Yi Chen、De X. Zeng、Nan Xie、Yi Z. Dang
DOI:10.1021/jo050236r
日期:2005.6.1
units undergo reversible ring-opening and ring-closing photoisomerization reactions in nonpolar solvents with UV/vis light, and some of them exhibit good fatigue resistance and no marked degradation detected after 10 cycles via an on/off switch. In polar solvents, however, photochromic diarylethenes with 2,5-dihydropyrrole bridging units produce 3,4-diarylpyrrole derivatives instead of the ring-closing
制备了具有2,5-二氢吡咯桥联单元的对称和非对称二芳烃,并研究了光致变色性能。具有2,5-二氢吡咯桥联单元的对称和不对称二芳烃在紫外线/可见光的非极性溶剂中均经历可逆的开环和闭环光异构化反应,其中一些具有良好的耐疲劳性,经过10个循环后未检测到明显的降解一个开/关开关。然而,在极性溶剂中,具有2,5-二氢吡咯桥连单元的光致变色二硫杂环丁烷在紫外线照射下产生3,4-二芳基吡咯衍生物,而不是二硫杂环丁烷的闭环异构体。制备了一类具有2,5-二氢吡咯桥联单元的N-取代的3,4-二苯基乙烯,并将其用作研究转化反应的模板。