ICCAS OpenIR
Evaluation of photochromic properties in heteropolyoxometallate-based inorganic polymeric thin films
Feng, W; Zhang, TR; Liu, Y; Lu, R; Guan, C; Zhao, YY; Yao, JN
2003-01-02
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
Volume77Issue:1Pages:294-298
AbstractA series of photochromic hybrid films were prepared through entrapping tungsten heteropolyoxometallate (PW12O403-) and molybdenum heteropolyoxometallate (PMO12O403-) in polyacrylamide (PAM) matrix, the corresponding structure and photochromic behaviors of the films were investigated with Fourier transform infrared (FT-IR), UV-Vis-near-infrared (NIR) absorption spectra (UV-Vis-NIR) and electron spin resonance (ESR). FT-IR results showed that the Keggin geometry of heteropolyoxometallate was still preserved inside the composites and strong Coulombic interaction was built between heteropolyoxometallate and PAM via hydrogen bonding. Irradiated with ultraviolet light, the transparent films changed from colorless to blue and showed reversible photochromism. The bleaching process occurred when the films were in contact with air or O-2 in the dark. The molybdenum heteropolyoxometallate hybrid film had higher photochromic efficiency and slower bleaching reaction than tungsten heteropolyoxometallate hybrid film. The characteristic signals of radical and W(V) or Mo(V) in ESR spectra indicated that PAM is a hydrogen donor and the photoreduced process is in accordance with the radical mechanism. (C) 2002 Elsevier Science B.V. All rights reserved.
KeywordHeteropolyoxometallate Polyacrylamide Hybrid Thin Film Photochromism
Indexed BySCI
Language英语
WOS IDWOS:000178429900043
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80306
Collection中国科学院化学研究所
Corresponding AuthorLu, R
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
Recommended Citation
GB/T 7714
Feng, W,Zhang, TR,Liu, Y,et al. Evaluation of photochromic properties in heteropolyoxometallate-based inorganic polymeric thin films[J]. MATERIALS CHEMISTRY AND PHYSICS,2003,77(1):294-298.
APA Feng, W.,Zhang, TR.,Liu, Y.,Lu, R.,Guan, C.,...&Yao, JN.(2003).Evaluation of photochromic properties in heteropolyoxometallate-based inorganic polymeric thin films.MATERIALS CHEMISTRY AND PHYSICS,77(1),294-298.
MLA Feng, W,et al."Evaluation of photochromic properties in heteropolyoxometallate-based inorganic polymeric thin films".MATERIALS CHEMISTRY AND PHYSICS 77.1(2003):294-298.
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