کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5185601 | 1381082 | 2008 | 7 صفحه PDF | دانلود رایگان |
The interaction between poly(di-n-hexylsilane) (PDHS) and TiO2 nanoparticle was studied based on the temperature dependence of the fluorescence of a PDHS/TiO2 nanoparticle hybrid film. The polysilane is a suitable probe to investigate a guest polymer-host matrix interaction because the photophysical properties of polysilanes remarkably depend on the conformation of the Ï-conjugated Si-Si chain. The PDHS/TiO2 nanoparticle hybrid film showed a fluorescence band assigned to a disordered structure even at 80Â K whereas only the fluorescence band of an ordered structure was observed for the PDHS film at 80Â K. The disordering of the Si-Si main chain was explained by the perturbation of the n-hexyl side chain in the neighborhood of the TiO2 nanosurface. The non-radiative deactivation of the excited state via the disorder-induced local potential minima was suggested by the temperature dependence of the fluorescence intensities of the disordered and ordered structures in the temperature region from 80 to 160Â K.
Journal: Polymer - Volume 49, Issue 2, 21 January 2008, Pages 554-560