Evaluation of photochromic properties in heteropolyoxometallate-based inorganic polymeric thin films

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	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
刊名	MATERIALS CHEMISTRY AND PHYSICS
	2003-01-02
卷号	77 期号:1 页码:294-298
关键词	Heteropolyoxometallate Polyacrylamide Hybrid Thin Film Photochromism
ISSN号	0254-0584
英文摘要	A 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.
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000178429900043
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/80305]
专题	中国科学院化学研究所
通讯作者	Lu, R
作者单位	1.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
推荐引用方式 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.