Spectroscopic study of the Eu3+, Tb3+ and Gd3+ complexes with ligands derived from dicarboxylic acids

Quimica nova

Lima, Patrícia P.¹  Malta, Oscar L.¹  Alves Júnior, Severino¹ 

[1] Universidade Federal de Pernambuco, Recife

关键词: lanthanide;    luminescence;    quantum yield.;   

DOI  :  10.1590/S0100-40422005000500014

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Complexes of Eu3+,Tb3+ and Gd3+ with dipicolinic acid, chelidamic acid andchelidonic acid have been synthesized in order to study the effect of the substituentgroups on the luminescence of the lanthanide complexes. The luminescence ofthe Eu3+ and Tb3+ complexes was quantified by quantumyield measurements. The complexes of Gd3+ have been used to determinethe energies of the triplet states of the ligands. The Tb3+ complexsynthesized with dipicolinic acid presented the highest quantum yield due tothe energy difference between the triplet state of the dipicolinic acid andthe emitting level of the Tb3+ ion.

【 授权许可】

CC BY