Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (5): 703-708.doi: 10.1007/s40242-014-4160-5

Previous Articles     Next Articles

Preparation and Visible-light Photochromism of Phosphomolybdic Acid/Polyvinylpyrrolidone Hybrid Film

SUN Yan1, WANG Xiansheng1, LU Yamei1, XUAN Limin1, XIA Shuang1, FENG Wei1, HAN Xiangkui2   

  1. 1. Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, P. R. China;
    2. Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, P. R. Chin
  • Received:2014-04-28 Revised:2014-07-14 Online:2014-10-01 Published:2014-08-04
  • Contact: FENG Wei E-mail:weifeng@jlu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.61340048), the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20110041120001) and the Industrial Technology Research and Development Project of Jilin Province, China(No.2013C044).

Abstract:

The visible-light photochromic hybrid film was constructed by entrapping phosphomolybdic acid(PMoA) into polyvinylpyrrolidone(PVPd) networks. The microstructure, photochromic properties and mechanism were investigated with transmission electron microscopy(TEM), atomic force microscopy(AFM), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible(UV-Vis) spectra and X-ray photoelectron spectroscopy(XPS). The results indicate that the Keggin geometry of PMoA and the basic structure of PVPd are not destroyed during the composite process. Irradiated with visible light, the transparent PMoA/PVPd film changes color from colorless to blue and exhibits reversible photochromism in the presence of oxygen. According to the XPS analysis, the charge-transfer bridge of N-H-O has been built between PMoA and PVPd matrix via non-covalent bonding, and the appearance of Mo5+ species indicates that the photo-reduction process is in accordance with the proton transfer mechanism.

Key words: Phosphomolybdic acid, Polyvinylpyrrolidone, Visible-light photochromism, Hybrid film