Estudo espectroscópico de complexos de Eu3+, Tb3+ E Gd3+ com ligantes derivados de ácidos dicarboxílicos

Química Nova

Patrícia P. Lima¹  Oscar L. Malta¹  Severino Alves Júnior¹ 

[1] ,Universidade Federal de Pernambuco Centro de Ciências Exatas e da Natureza Departamento de Química FundamentalRecife PE

关键词: lanthanide;    luminescence;    quantum yield;   

DOI  :  10.1590/S0100-40422005000500014

来源: SciELO

【 摘 要 】

Complexes of Eu3+, Tb3+ and Gd3+ with dipicolinic acid, chelidamic acid and chelidonic acid have been synthesized in order to study the effect of the substituent groups on the luminescence of the lanthanide complexes. The luminescence of the Eu3+ and Tb3+ complexes was quantified by quantum yield measurements. The complexes of Gd3+ have been used to determine the energies of the triplet states of the ligands. The Tb3+ complex synthesized with dipicolinic acid presented the highest quantum yield due to the energy difference between the triplet state of the dipicolinic acid and the emitting level of the Tb3+ ion.

【 授权许可】

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