Photochromic polyoxotungstoeuropate K12[EuP5W30O110]/polyvinylpyrrolidone nanocomposite films |
| |
| Authors: | Tie Rui Zhang Xin Li Liu Tie Jin Li |
| |
| Institution: | a Department of Chemistry, Faculty of Science, Jilin University, Changchun 130023, Chinab Institute of Chemistry and Center for Molecular Science, Chinese Academy of Sciences, Beijing 100080, China |
| |
| Abstract: | A novel photochromic nanocomposite film containing polyoxotungstoeuropate K12EuP5W30O110] 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 O2 in the dark. The photochromism of the composite film is due to charge transfer by reduction of polyoxotungstoeuropate and oxidation of polyvinylpyrrolidone. |
| |
| Keywords: | Nanocomposite Photochromic Polyoxotungstoeuropate Charge-transfer |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
