Quantitative study of photochromic transformations of diarylethene derivatives with either perhydrocyclopentene or oxazolone or聽lactone聽units

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• 作者：J.-C. Micheau^a ; ^{micheau@chimie.ups-tlse.fr" class="auth_mail} ; C. Coudret^a ; O.I. Kobeleva^b ; V.A. Barachevsky^b ; V.N. Yarovenko^c ; S.N. Ivanov^c ; B.V. Lichitsky^c ; M.M. Krayushkin^c
• 关键词：Photochromism ; Diarylethenes ; Quantum yields ; Photokinetic analysis ; Kinetic modelling ; Structure&ndash ; properties relationships
• 刊名：Dyes and Pigments
• 出版年：July, 2014
• 年：2014
• 卷：106
• 期：Complete
• 页码：32-38
• 全文大小：758 K

文摘

This work is devoted to the determination of ring-closure and ring-opening quantum yield values of 18 thermally irreversible photochromic diarylethene derivatives. Three classes have been systematically investigated. They have been obtained (i) by changing the bridging ring that stabilizes the central ethenic double bond in the cis configuration from perhydrocyclopentene, oxazolone and lactones, and (ii) by varying the lateral aryl moieties from thiophene, benzothiophene and thiazoles. Numerical modeling of UV/visible absorption vs time kinetic curves recorded under continuous monochromatic irradiation in combination with chemical actinometry was employed to determine the photo-cyclisation and cycloreversion quantum yields together with the molar absorption coefficient of the closed form. Structure-properties diagrams obtained by plotting 位_A vs 位_B, 蓻_A vs 蓻_B and 桅_AB vs 桅_BA visualize all the structural effects helping the evaluation of these compounds as possible photoswitches or high-density optical recording materials.