本文应用荧光滴定法研究了稀土络合物的敏化荧光,比较了某些稀土的二元络合物的激发光谱和荧光光谱,讨论了一些因素如配位体的配比、络合物浓度、酸碱度及其它络合剂对稀土络合物荧光的影响。对三元络合物的能量转移途径也进行了考查,了解到三元络合物中同时存在两个敏化剂配位体时,由于配位体络合力的不同,光能的吸收主要是通过与稀土结合较强的配位体向稀土离子作能量转移,所研究络合物的能量转移机理属于Dexter型的短程交换相互作用。 Fluorescence titration was used to study the sensitized fluorescence of rare earth complexes. The excitation and fluorescence spectra of binary complexes of some rare earths were compared. Some factors such as ligand ratio, complex concentration , PH and other complexing agents on the fluorescence of rare earth complexes. The energy transfer pathway of the ternary complex was also investigated. It was found that the absorption of light energy mainly depends on the complexing force of the ligand when two sensitizer ligands exist simultaneously in the ternary complex. The energy transfer mechanism of the complex is a short-range exchange interaction of Dexter type through energy transfer to the rare earth ions by strong ligands combined with rare earths.