高等学校化学研究 ›› 2014, Vol. 30 ›› Issue (5): 703-708.doi: 10.1007/s40242-014-4160-5
SUN Yan1, WANG Xiansheng1, LU Yamei1, XUAN Limin1, XIA Shuang1, FENG Wei1, HAN Xiangkui2
SUN Yan1, WANG Xiansheng1, LU Yamei1, XUAN Limin1, XIA Shuang1, FENG Wei1, HAN Xiangkui2
摘要:
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.