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Synthesis and optical character of novel rare earth Tb, Eu(Ⅲ ) complexes with β-Diketone

XIAOMING REN1, CHANGPING WEI1,* , GUO CHENG1

Affiliation

  1. Collage of Materials Science and Engineering, Changchun University of Science and Technology, Weixing Road 7186,Changchun 130022, Jilin Province, China

Abstract

A novel β-diketone 1-(4- aminophenyl)-3-phenylpropane-1, 3-dione (L) was synthesized by classical claisen condensation reaction. With L as the first ligand and imidazo [5, 6-f] phenanthroline (IP) as the secondary ligand, two new Tb, Eu(Ⅲ ) ternary complexes were prepared by precipitation method. The ligands and complexes were characterized by elemental analysis, IR spectra, UV spectra. Fluorescence spectra demonstrated that the complexes could emit characteristic fluorescence of rare earth ions and the fluorescence intensity of Tb(L)3IP was obviously higher. Further investigation showed that the fluorescence intensity was influenced with the matching situation of energy level between the lowest triplet state of the ligand L and the emission energy of rare earth ion. It suggested that the energy difference was well matched and the intramolecular energy could transfer efficiently to central Tb3+ ion in Tb(L)3IP, which was an excellent green-emitter and would be regarded as a valuable material..

Keywords

Rare earth, Synthesized, Fluorescence properties, Electron exchange, Energy difference.

Submitted at: April 18, 2011
Accepted at: Sept. 15, 2011

Citation

XIAOMING REN, CHANGPING WEI, GUO CHENG, Synthesis and optical character of novel rare earth Tb, Eu(Ⅲ ) complexes with β-Diketone, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 9, pp. 1167-1171 (2011)