Fabrication of heteropolyoxometalate-based photochromic inorganic-organic nanocomposites
Zhang, TR; Feng, W; Bao, CY; Lu, R; Zhang, XT; Li, TJ; Zhao, YY; Yao, JN
AbstractA series of photochromic sol-el films are prepared through entrapping tungsten heteropolyoxometallates (PW12O403-, SiW12O404-) and molybdenum heteropolyoxometallate (PMo12O403-) into a kind of inorganic-organic matrix cohydrolyzed from tetraethylorthosilicate and 3-aminopropyltriethoxysilane. The films show reversible photochromicity. Irradiated with ultraviolet light, the transparent films change from colorless to blue. Then, bleaching occurs when the films area in contact with air or O-2 in the dark. The Keggin-type polyanions interact with R-NH3+ cations strongly, and thus disperse uniformly in the sol-gel matrix, as proved by Fourier transform infrared spectra and x-ray diffraction. The molybdenum heteropolyoxometallate sol-gel film has higher photochromic efficiency and much slower bleaching than its counterparts of tungsten heteropolyoxometallate. A charge-transfer model which is supported by electron spin resonance and related literature [T. Yamase, Chem. Rev. 98, 307, (1998)] is put forth to explain the above experimental results.
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WOS IDWOS:000170227500016
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorZhao, YY
Affiliation1.Jilin Univ, Dept Chem, Changchun 130023, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Ctr Mol Sci, Beijing 100080, Peoples R China
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GB/T 7714
Zhang, TR,Feng, W,Bao, CY,et al. Fabrication of heteropolyoxometalate-based photochromic inorganic-organic nanocomposites[J]. JOURNAL OF MATERIALS RESEARCH,2001,16(8):2256-2263.
APA Zhang, TR.,Feng, W.,Bao, CY.,Lu, R.,Zhang, XT.,...&Yao, JN.(2001).Fabrication of heteropolyoxometalate-based photochromic inorganic-organic nanocomposites.JOURNAL OF MATERIALS RESEARCH,16(8),2256-2263.
MLA Zhang, TR,et al."Fabrication of heteropolyoxometalate-based photochromic inorganic-organic nanocomposites".JOURNAL OF MATERIALS RESEARCH 16.8(2001):2256-2263.
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