Estudos fotoluminescentes em compostos de íons terras raras coordenados por um derivado carbazólico

Química Nova

Renata Figueredo Martins²  Cláudio Roberto Neri²  Paulo Cesar De Sousa Filho²  Osvaldo Antonio Serra²  Kleber Thiago De Oliveira¹ 

[1] ,Universidade de São Paulo Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto Departamento de Química,Ribeirão Preto SP ,Brasil

关键词: rare earth;    luminescence;    carbazolic ligand;   

DOI  :  10.1590/S0100-40422010001000022

来源: SciELO

【 摘 要 】

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

【 授权许可】

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