ABSTRACT
In this paper, ternary solid complexes of Tb-benzioc acid-1,10-phenanthroline have been synthesized. Compared with binary complexes of Tb-benzioc acid, their properties were investigated. The results showed that the second ligand-phenanthroline enhanced the fluorescence intensities of Tb3+, and shortened its fluorescence lifetime, and it was found that the aggregative state influenced the luminescence properties of ternary complexes. When particulates dispersed to a certain degree, the probability of 5D4-->7F5 transition of Tb3+ was great, so, green fluorescence was observed for the complexes. With the aggregation of particles, the probability of 5D4-->7F5 transition of Tb3+ decreased, while the probability of D4-->7F3 transition increased. Therefore, ternary complexes of Tb-benzoic acid-1,10-phenanthroline exhibited yellow fluorescence. In addition, spectroscopic properties of the complexes were investigated.
