Photoluminescence studies in rare earth ions coordinated by a carbazolic derivative

Quimica nova

Oliveira, Kleber Thiago de¹  Serra, Osvaldo Antonio²  Neri, Cláudio Roberto²  Sousa Filho, Paulo Cesar de²  Martins, Renata Figueredo² 

[1] Universidade Federal de São Carlos, São Carlos, Brasil;Universidade de São Paulo, Ribeirão Preto, Brasil

关键词: rare earth;    luminescence;    carbazolic ligand.;   

DOI  :  10.1590/S0100-40422010001000022

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

[RE(czb)3(H2O)2]complexes (where RE = Eu3+, Tb3+, Gd3+; andczb = 4-(9H-carbazol-9-yl)benzoato) have been synthesized and characterized.The Gd3+ complex was used to determine the triplet state energy ofthe czb ligand. Photoluminescence measurements of the complexes have been carriedout under UV excitation. The Tb3+ complex exhibited a strong greenluminescence indicating an efficient antenna effect, whereas the Eu3+complex showed low red luminescence and the Gd3+ complex a blue-greenluminescence from the ligand. The luminescence lifetimes and quantum yieldshave also been measured for the evaluation of the spectroscopic behavior ofthe complexes.

【 授权许可】

CC BY