Thermochromic Organoaminomodified Silica Composite Films Containing Phosphomolybdic Acid |
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| Authors: | Tie Rui ZhangWei Feng Ran LuChun Yan Bao Tie Jin LiYing Ying Zhao Jian Nian Yao |
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| Affiliation: | a Department of Chemistry, Jilin University, Changchun, 130023, People's Republic of Chinab Institute of Chemistry and Center for Molecular Science, Chinese Academy of Sciences, Beijing, 100080, People's Republic of China |
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| Abstract: | ![]()
A novel thermochromic sol-gel film has been prepared for the first time through entrapping phosphomolybdic acid into a kind of inorganic-organic matrix co-hydrolyzed from tetraethylorthosilicate and 3-aminopropyltriethoxysilane. The thus-obtained amorphous nanocomposite film was characterized by IR spectra, UV-vis absorption spectra, XRD, TG-DTA, and ESR. Results show that phosphomolybdate polyanions interact with R-NH+3 cations strongly and disperse homogeneously in the sol-gel matrix. The sol-gel film exhibits thermochromic properties. Annealed from 120 to 180°C, the transparent film changes from pale-yellow to blue. A possible charge-transfer process has been suggested to explain the thermochromism. |
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| Keywords: | sol-gel thermochromic phosphomolybdic acid charge transfer. |
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