| 光谱学与光谱分析 |
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| Photophysical Properties of Poly (2-Methoxy-5-Octyloxy)-p-Phenylene Vinylene/TiO2 Nano-Composites |
| SUN Jian-ping1,2, WENG Jia-bao1,2, CHENG Yun-tao1, LIN Ting1, HUANG Xiao-zhu1 |
1. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
2. Key Laboratory of Polymer Materials of Fujian Province, Fuzhou 350007, China |
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Abstract The photoelectric composites of poly (2-methoxy-5-octyloxy)-p-phenylene vinylene/nanometer TiO2(PMOCOPV/TiO2) with different nanometer TiO2 amount were synthesized through dehydrochlorination in-situ polymerization. The results of Fourier transform infrared spectroscopy and Raman spectroscopy indicated that the surface of nanometer TiO2 was coated with PMOCOPV. UV-Vis spectrum showed that the absorption of PMOCOPV/TiO2 nano-composites was strengthened in the range of violet and visible light with the contents of TiO2 increasing. The composite dimensions were observed by highly resolution transmission electron microscope, PMOCOPV/TiO2 nano-composites dispersed uniformly and possessed core-shell structure, the diameter of PMOCOPV/TiO2 was measured to be about 30 nm, and the thickness of the PMOCOPV coating was about 8-10 nm. Photoluminescence spectroscopy indicated that the maximum emission wavelength of the PMOCOPV/TiO2 was red-shifted with increasing TiO2 concentration. The fluorescence lifetime of PMOCOPV/TiO2 was about 1 ns. The intensity and lifetime of fluorescence was increased remarkably with the contents of TiO2 increasing. The mechanism of the strengthened fluorescence quantum efficiency and fluorescence intensity of PMOCOPV/TiO2 was investigated through the charge transfer, exciton dissociation and potential energy in PMOCOPV/TiO2 nano-composites.
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Received: 2007-05-10
Accepted: 2007-08-20
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Corresponding Authors:
SUN Jian-ping
E-mail: jpsun@fjnu.edu.cn
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