Photochromism of new 3,5-position hybrid diarylethene derivatives bearing both thiophene and thiazole moieties |
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Authors: | Gang Liu Shouzhi Pu Xiaomei Wang |
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Institution: | a Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Fenlin Street, Nanchang 330013, PR China b College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China |
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Abstract: | Five new diarylethenes based on a hybrid structure of bis(5-thiazolyl)ethene and bis(3-thienyl)ethene were synthesized, and the structures of the four compounds were determined by single-crystal X-ray diffraction analysis. The properties of these diarylethenes, such as photochromism, fluorescence, and electrochemical properties were investigated in detail. All of these compounds showed good photochromism and fluorescence both in solution and in PMMA films. The electron-donating substituents could effectively increase the cyclization and cycloreversion quantum yields, and the fluorescence emission peaks, whereas the electron-withdrawing groups functionalized an inverse action for these diarylethene derivatives. Cyclic voltammetry revealed that great differences existed amongst the electrochemical behaviors of these compounds. The oxidation potentials and the band gaps of these diarylethenes increased remarkably with the increase in electron-withdrawing ability. All results suggested that the effects of substitution have a significant effect on the photochemical and electrochemical behaviors of these diarylethene derivatives. |
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Keywords: | Photochromism Diarylethene Thiazole moiety Substituent effect Optical and electrochemical property |
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