Photochromic behavior and mechanism of thin films in H3PW12O40/polyacrylamide system

CORC > 化学研究所 > 中国科学院化学研究所

	Photochromic behavior and mechanism of thin films in H3PW12O40/polyacrylamide system
	Feng, W ; Zhang, TR ; Wei, L ; Lu, R ; Bai, YB ; Li, TJ ; Zhao, YY ; Yao, JN
刊名	MATERIALS LETTERS
	2002-06-01
卷号	54 期号:4 页码:309-313
关键词	H3pw12o40 Polyacrylamide Photochromism Photoreduction
ISSN号	0167-577X
英文摘要	A new photochromic film was prepared based on the Keggin type H3PW12O40 (PW12) with polyacrylamide (PAM) matrix. The microstructure, photochromic behavior and mechanism were investigated with FT-Infrared spectroscopy (FT-IR), atomic force microscopy (AFM), transmission electron microscopy (TEM), ultraviolet-visible absorption spectroscopy (UV-VIS), and electron resonance spectroscopy (ESR). FT-IR results showed that the Keggin geometry of PW12 was still preserved inside the matrix, and a charge-transfer bridge was built between PW12 and PAM via hydrogen bond. AFM images indicated that the surface topography of the polymer matrix changed after adding PW12. In the hybrid films, the PW12 particles had regular microstucture in nanoscale shown in TEM image. Under UV irradiation, the film was reduced photochemically to yield a blue species. With the increase of irradiation time, the photoreduction proceeded from one-electron to two-electron blue stage. The characteristic signals of W (V) and radical in ESR spectra indicated that the photoreduced process was in accordance with the radical mechanism. (C), 2002 Elsevier Science B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000175702600012
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/79445]
专题	中国科学院化学研究所
通讯作者	Zhao, YY
作者单位	1.Jilin Univ, Dept Chem, Changchun 130023, Peoples R China 2.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Feng, W,Zhang, TR,Wei, L,et al. Photochromic behavior and mechanism of thin films in H3PW12O40/polyacrylamide system[J]. MATERIALS LETTERS,2002,54(4):309-313.
APA	Feng, W.,Zhang, TR.,Wei, L.,Lu, R.,Bai, YB.,...&Yao, JN.(2002).Photochromic behavior and mechanism of thin films in H3PW12O40/polyacrylamide system.MATERIALS LETTERS,54(4),309-313.
MLA	Feng, W,et al."Photochromic behavior and mechanism of thin films in H3PW12O40/polyacrylamide system".MATERIALS LETTERS 54.4(2002):309-313.