| 光谱学与光谱分析 |
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| Photo-Induced Electron Transfer Effects of Poly(2-Methoxy-5-Octyloxy)-p-Phenylene Vinylene/Y2O3∶Eu3+ Nano-Composites |
| SUN Jian-ping1,2, MA Lin-pu1, LIN Ting1 |
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 nano-composites of poly(2-methoxy-5-octyloxy)-p-phenylene vinylene/Y2O3∶Eu3+ (PMOCOPV/Y2O3∶Eu3+) were prepared by dehydrochlorination in-situ polymerization.The result of Fourier transform infrared spectroscopy indicates that PMOCOPV is coated on the surface of Y2O3∶Eu3+.Compared with PMOCOPV, the absorption of PMOCOPV/Y2O3∶Eu3+ is strengthened, and a red shift of the absorption peak can be clearly observed in the UV-Vis spectrum.Photoluminescence spectroscopy indicates that the maximum emission wavelength of the PMOCOPV/Y2O3∶Eu3+ is red-shifted and the intensity of photoluminescence increases in comparison with PMOCOPV.PMOCOPV/Y2O3∶Eu3+ shows fluorescence increasing, which involved the inter-molecular photo-induced charge transfer process.The optical band gap of PMOCOPV/Y2O3∶Eu3+ decreases.The third-order optical nonlinear susceptibility of PMOCOPV/Y2O3∶Eu3+ nano-composites was measured by degenerate four wave mixing.The results show that the third-order nonlinear optical responses of PMOCOPV/Y2O3∶Eu3+ nano-composites are enhanced in comparison with PMOCOPV, which can be attributed to inter-molecular photo-induced electron transfer and delocalized π electron coupling between PMOCOPV and Y2O3∶Eu3+.
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Received: 2008-12-02
Accepted: 2009-03-06
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Corresponding Authors:
SUN Jian-ping
E-mail: jpsun@fjnu.edu.cn
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