Smart Heterostructures for Tailoring the Optical Properties of Photochromic Hybrid Organic鈥揑norganic Polyoxometalates

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• 作者：Re虂mi Dessapt ; Marie Gabard ; Martine Bujoli-Doeuff ; Philippe Deniard ; Ste虂phane Jobic
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：September 19, 2011
• 年：2011
• 卷：50
• 期：18
• 页码：8790-8796
• 全文大小：948K
• 年卷期：v.50,no.18(September 19, 2011)
• ISSN：1520-510X

文摘

A new concept of photoresponsive composites has been elaborated by intimately connecting a Photochromic Phase (PP), (H₂DABCO)₂(HDMA)_0.5Na_0.75(H₃O)_0.75[Mo₈O₂₇]路3H₂O (1), with a second hybrid organic鈥搃norganic molybdate material, (H₂DABCO)(HDABCO)[Fe(OH)₆Mo₆O₁₈]路4H₂O (2) acting as an Oxidation Catalytic Phase (OCP) toward the former once photoexcited. The association of both the PP and the OCP in the composite drastically improves the bleaching process of the PP alone because of efficient electronic transfers through the OCP-PP interface without affecting significantly its photoinduced color change characteristic. Two OCP-PP composites with different PP weight percents have been obtained by associating 1 with 2. The optical properties of these composites before and after UV irradiation have been investigated by Diffuse Reflectance Spectroscopy, and the strong impact of the OCP on the fading kinetics of the PP has been clearly highlighted.