Photochromic polyoxotungstoeuropate K12[EuP5W30O110]/polyvinylpyrrolidone nanocomposite films

被引：46

作者：

Zhang, TR

Lu, R ^{[1
]}

Liu, XL

Zhao, YY

Li, TJ

Yao, JN

机构：

[1] Jilin Univ, Dept Chem, Fac Sci, 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

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2003年 / 172卷 / 02期

基金：

中国国家自然科学基金;

关键词：

nanocomposite; photochromic; polyoxotungstoeuropate; charge-transfer;

D O I：

10.1016/S0022-4596(03)00036-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A novel photochromic nanocomposite film containing polyoxotungstoeuropate K-12[EuP5W30O110] entrapped in polyvinylpyrrolidone has been prepared through a spin-on coating technique. Thus-obtained amorphous nanocomposite film was characterized by IR spectra, UV-vis absorption spectra, XRD, SEM, TG-DTA, and ESR. Results show that polyoxotungstoeuropate interacts with polyvinylpyrrolidone strongly and disperses homogeneously in the matrix. The composite film exhibits good photochromic properties. When irradiated with UV light, the transparent film changes from colorless to blue. Then, bleaching occurs when the film is in contact with ambient air or O-2 in the dark. The photochromism of the composite film is due to charge transfer by reduction of polyoxotungstoeuropate and oxidation of polyvinylpyrrolidone. (C) 2003 Elsevier Science (USA). All rights reserved.

引用

页码：458 / 463

页数：6

共 23 条

[1] A HETEROPOLYANION WITH FIVEFOLD MOLECULAR SYMMETRY THAT CONTAINS A NONLABILE ENCAPSULATED SODIUM-ION - THE STRUCTURE AND CHEMISTRY OF [NAP5W30O110]14- [J].