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将Eu(BA)3.phen·H2O掺杂到聚乙烯吡咯烷酮(PVP)中制备了三元稀土配合物/PVP复合薄膜。首先,在乙醇/水溶剂中合成了铕(Eu3+),苯甲酸(BA),1,10-邻菲啰啉(phen)的三元稀土配合物。然后以乙醇和N,N-二甲基甲酰胺为溶剂,按稀土配合物与PVP质量比为1∶9,将稀土配合物掺杂到PVP溶液中。最后将混合液滴到聚四氟乙烯基片上,制备出Eu(BA)3.phen·H2O/PVP复合薄膜。复合薄膜在可见光区具有很好的透明性。通过元素分析、红外光谱、X射线衍射分析和荧光光谱对样品进行了表征。确定稀土配合物的组成为Eu(BA)3.phen·H2O。红外光谱结果表明:复合薄膜中PVP与稀土配合物分子之间有相互作用;X射线衍射结果表明:稀土配合物在与PVP复合过程中出现了某些晶面的定向生长;发射光谱结果表明:PVP复合薄膜具有Eu3+的红色特征发射。与稀土配合物相比PVP复合薄膜中Eu3+离子周围的局域对称性降低。激发光谱结果表明:PVP与Eu3+之间可能有能量传递。
Ternary rare earth complexes / PVP composite films were prepared by doping Eu (BA) 3.phen · H2O into polyvinylpyrrolidone (PVP). First, ternary rare earth complexes of europium (Eu3 +), benzoic acid (BA) and 1,10-phenanthroline (phen) were synthesized in ethanol / water solvent. Then with ethanol and N, N-dimethylformamide as solvent, according to the mass ratio of rare earth complex and PVP is 1: 9, the rare earth complex is doping into PVP solution. Finally, the mixture was dropped onto a polytetrafluoroethylene substrate to prepare a Eu (BA) 3.phen · H2O / PVP composite film. Composite films have good transparency in the visible region. The samples were characterized by elemental analysis, infrared spectroscopy, X-ray diffraction analysis and fluorescence spectroscopy. The composition of the rare earth complex was determined to be Eu (BA) 3.phen · H2O. Infrared spectroscopy results show that there is interaction between PVP and rare earth complex molecules in the composite film. The X-ray diffraction results show that the orientation growth of some crystal planes occurs during the complexation of PVP with rare earth complexes. The emission spectra show that: PVP composite film has the Eu3 + red emission characteristics. The local symmetry around the Eu3 + ions in the PVP composite film decreases as compared with the rare earth complexes. Excitation spectroscopy results show that there may be energy transfer between PVP and Eu3 +.