Photoluminescence studies in rare earth ions coordinated by a carbazolic derivative

Química Nova

Serra, Osvaldo Antonio¹  Universidade Federal de São Carlos, São Carlos, Brasil¹  Universidade de São Paulo, Ribeirão Preto, Brasil¹  Oliveira, Kleber Thiago de¹  Neri, Cláudio Roberto¹  Sousa Filho, Paulo Cesar de¹  Martins, Renata Figueredo¹ 

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+; 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】

Unknown