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Ultrasound-induced change of microstructure and photochromic properties of polyacrylamide thin films containing a polyoxometalate

Published online by Cambridge University Press:  31 January 2011

Wei Feng ,
Tierui Zhang ,
Jun Liu ,
Ran Lu ,
Yingying Zhao  and
Jiannian Yao
Wei Feng
Affiliation:
Department of Chemistry, Jilin University, ChangChun 130023, People's Republic of China
Tierui Zhang
Affiliation:
Department of Chemistry, Jilin University, ChangChun 130023, People's Republic of China
Jun Liu
Affiliation:
Department of Chemistry, Jilin University, ChangChun 130023, People's Republic of China
Ran Lu*
Affiliation:
Department of Chemistry, Jilin University, ChangChun 130023, People's Republic of China
Yingying Zhao
Affiliation:
Department of Chemistry, Jilin University, ChangChun 130023, People's Republic of China
Jiannian Yao
Affiliation:
Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
*
a)Address all correspondence to this author. e-mail: luran@mail.jlu.edu.cn
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Abstract

Novel photochromic nanocomposite thin films were prepared by entrapping polyoxometalate in a polyacrylamide matrix via the ultrasound technique. The ultrasound irradiation has a great effect on the microstructure and photochromic properties of the hybrid films. The polyoxometalate nanoparticles are finely dispersed in the polymer matrix after ultrasound treatment, instead of agglomeration in the unirradiated film with ultrasound. Consequently, the photochromic behaviors of the hybrid films can be controlled from irreversible heteropolybrown to reversible heteropolyblue by ultrasound. The influence of ultrasound on microstructure and photochromic properties is due to the sonochemical controlling interfacial interactions in the hybrid system.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 3 , March 2003 , pp. 709 - 713
Copyright
Copyright © Materials Research Society 2003

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