Institut des Matériaux Jean Rouxel, Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes, France.
Inorg Chem. 2011 Sep 19;50(18):8790-6. doi: 10.1021/ic200653d. Epub 2011 Aug 22.
A new concept of photoresponsive composites has been elaborated by intimately connecting a Photochromic Phase (PP), (H(2)DABCO)(2)(HDMA)(0.5)Na(0.75)(H(3)O)(0.75)[Mo(8)O(27)]·3H(2)O (1), with a second hybrid organic-inorganic molybdate material, (H(2)DABCO)(HDABCO)[Fe(OH)(6)Mo(6)O(18)]·4H(2)O (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.
一个新的光响应复合材料的概念已经被详细阐述，通过将光致变色相（PP），（H（2）DABCO）（2）（HDMA）（0.5）Na（0.75）（H（3）O）（0.75）[Mo（8）O（27）]·3H（2）O（1），与第二个混合有机-无机钼酸盐材料，（H（2）DABCO）（HDABCO）[Fe（OH）（6）Mo（6）O（18）]·4H（2）O（2）相联系，后者在光激发后充当氧化催化相（OCP）对前者。由于在 OCP-PP 界面上通过有效的电子转移，复合材料中 PP 和 OCP 的结合极大地改善了 PP 单独的漂白过程，而不会显著影响其光致变色特性。通过将 1 与 2 结合，得到了两种具有不同 PP 重量百分比的 OCP-PP 复合材料。通过漫反射光谱研究了这些复合材料在紫外线照射前后的光学性质，清楚地突出了 OCP 对 PP 褪色动力学的强烈影响。
