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采用Claisen缩合反应合成了一种β-二酮1-(4-氨基苯)-3-苯基丙烷-1,3-二酮(L:C15H13NO2),以元素分析和1H NMR谱确定了其组成,核磁和红外分析结果表明L主要以烯醇式存在。以L为第一配体,分别以邻菲罗啉(phen),2,2’-联吡啶(bipy)为第二配体,合成了新的稀土Eu,Tb(Ⅲ)三元配合物。通过元素分析、红外光谱、紫外光谱、磷光光谱和荧光光谱对合成的配合物进行了表征。荧光光谱表明:稀土铽配合物的发光性能优于稀土铕配合物,进一步研究表明配体L与Tb3+间能级差较匹配,分子内传能效率高;phen对配合物的荧光敏化效果优于bipy,表明第二配体的刚性和共轭性越大,配合物的发光性能越好。
A β-diketone 1- (4-aminophenyl) -3-phenylpropane-1,3-dione (L: C15H13NO2) was synthesized by Claisen condensation reaction. Its composition The results of NMR and IR indicated that L mainly existed in enol form. A new rare earth Eu, Tb (Ⅲ) ternary complex was synthesized using L as the first ligand and phenanthroline (phen) and 2,2’-bipyridyl (bipy) as their second ligands respectively. The synthesized complexes were characterized by elemental analysis, IR, UV, phosphorescence and fluorescence spectra. Fluorescence spectra show that the luminescent properties of rare earth terbium complexes are better than that of rare earth europium complexes. Further studies show that the energy gap between ligand L and Tb3 + is more matched and the intramolecular energy transfer efficiency is higher. The fluorescence sensitization effect of phen bipy, indicating that the greater the rigidity and conjugation of the second ligand, the better the luminescent properties of the complex.