Photochromism of asymmetrical diarylethenes with a pyrimidine unit: Synthesis and substituent effects
摘要:
Five photochromic diarylethenes with a six-membered pyrimidine moiety were synthesized to investigate the effects of the substituents on their photochromic behaviors, and the structures of four of the diarylethenes were determined by single-crystal X-ray diffraction analysis. The pyrimidine moiety was connected directly to the central cyclopentene ring as an aryl moiety to participate the photoisomerization reaction in solution, solid amorphous films, and crystalline phase. All of the diarylethene derivatives showed favorable photochromism and functioned as notable fluorescent photo-switches in both solution and solid media. The electron-donating substituents enhanced their cyclization quantum yields, fatigue resistance, and fluorescence quantum yields, whereas the electron-withdrawing groups exerted inversed actions on the diarylethenes. The results revealed that the pyrimidine moiety and substituents played a very important role during the process of photoisomerization reactions. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis and the effects of substitution upon photochromic diarylethenes bearing an isoxazole moiety
作者:Shouzhi Pu、Hui Li、Gang Liu、Weijun Liu、Shiqiang Cui、Congbin Fan
DOI:10.1016/j.tet.2010.12.041
日期:2011.2
diarylethene derivatives. As compared to the unsubstituted parent diarylethene, introduction of the electron-donating/withdrawing substituents could efficiently modulate the optical and electrochemical properties of the diarylethenes bearing an isoxazole moiety. All results indicated that the isoxazole moiety and the substitution effects played a very important role during the process of photochromic reaction
Photochromism of new unsymmetrical diarylethenes based on the hybrid of azaindole and thiophene moieties
作者:Zhiyuan Sun、Hui Li、Gang Liu、Congbin Fan、Shouzhi Pu
DOI:10.1016/j.dyepig.2014.03.003
日期:2014.7
A new class of photochromic diarylethenes with both azaindole and thiophene moieties were synthesized to investigate the effects of the substituents on their photochromic behaviors, and their structures were determined by single crystal X-ray diffraction analysis. The azaindole moiety was connected directly to the central cyclopentene ring as a heteroaryl moiety to participate the photoisomerization
Photochromism of asymmetrical diarylethenes with a pyrimidine unit: Synthesis and substituent effects
作者:Hongliang Liu、Shouzhi Pu、Gang Liu、Bing Chen
DOI:10.1016/j.dyepig.2013.10.047
日期:2014.3
Five photochromic diarylethenes with a six-membered pyrimidine moiety were synthesized to investigate the effects of the substituents on their photochromic behaviors, and the structures of four of the diarylethenes were determined by single-crystal X-ray diffraction analysis. The pyrimidine moiety was connected directly to the central cyclopentene ring as an aryl moiety to participate the photoisomerization reaction in solution, solid amorphous films, and crystalline phase. All of the diarylethene derivatives showed favorable photochromism and functioned as notable fluorescent photo-switches in both solution and solid media. The electron-donating substituents enhanced their cyclization quantum yields, fatigue resistance, and fluorescence quantum yields, whereas the electron-withdrawing groups exerted inversed actions on the diarylethenes. The results revealed that the pyrimidine moiety and substituents played a very important role during the process of photoisomerization reactions. (C) 2013 Elsevier Ltd. All rights reserved.