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《Spectroscopy and Spectral Analysis》 2001-06
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Energy Transfer between Electric Polymer PVK and Terbium Complex and Its Transmission Electronmicroscope (TME) Study

TAO Dong liang 1,HUANG Bao gui 1,XU Yi zhuang 1,2 ,LI Wei hong 1,YANG Zhan lan 1,WU Jin guang 1,SUN Ling dong 1, YAN Chun hua 1,LIU Xue xin 2,GUO Fan xiu 2,and XU Duan fu 2 1 Department of Chemistry,State Key Laboratory of Ra  
A chloroform soluble terbium complex,which is confirmed to be Tb(aspirin) 3phen using element analysis and FT IR spectroscopy,was synthesized.Photoluminescent investigation on the terbium complex and PVK terbium complex composite was conducted.Frster energy transfer occurred between the terbium complex and the PVK matrix.There are no overlap between UV spectrum of the complex and the emission spectrum of PVK,however,overlap is observed between the excitation spectrum of the complex and the emission spectrum of PVK.Therefore,we suggest that the necessary condition of Frster energy transfer should be overlap between the excitation (not UV) spectrum of one complex and the emission spectrum of polymer matrix. Further investigation indicates that the emission of PVK can be suppressed at different extents by doping various amount of Tb(aspirin) 3phen into PVK films.The ratio of Tb(aspirin) 3phen∶PVK=1∶2 (wt%) are regarded as an optimized ratio for limiting the emission of PVK. TEM images of PVK/Tb(aspirin) 3phen films reveal that nanoparticles of the Tb complex are dispersed in the PVK matrix.The size of the aggregated complex in PVK matrix is 20-30 nm.The film is not homogeneous as dark regions co exist with light region in the TEM images.This phenomenon may be related to the short lifetime of electroluminescent devices.
【Fund】: 国家重点基础研究发展规划项目 (G1 9980 61 30 7);; 国家自然科学基金项目 (2 0 0 2 30 0 5)
【CateGory Index】: O633
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