发红色荧光铽配合物的合成及荧光性能的研究

doi:10.3964/j.issn.1000-0593(2011)01-0158-04

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Abstract Two terbium complexes were synthesized, with dibenzoylmethane (HDBM) as the first ligand and 1,10-phenanthroline (phen), dipyrido[3,2-a:2′,3′-c] quinoxaline as the second ligand. The studies of elemental analysis, rare earth complexometric titration, molar conduction, IR spectra, UV spectra, fluorescence excitation and emission spectra indicate that the complexes have the compositions of Tb (DBM)₃phen and Tb (DBM)₃dpq. The results show that the rare earth ion (Tb³⁺) was bonded with the carbonyl oxygen atom of DBM and nitrogen atoms of phen and dpq. For the terbium complexes prepared by precipitation, the peak positions of the transitions were similar with the ones of the common complexes. The peaks at 490, 545, 586 and 621 nm were assigned to the ⁵D₄→⁷F₆，⁵D₄→⁷F₆，⁵D₄→⁷F₆，⁵D₄→⁷F₆ transitions. For the fluorescence intensities of their ⁵D₄→⁷F₆，⁵D₄→⁷F₅ and ⁵D₄→⁷F₄ transitions were lower than that of the ⁵D₄→⁷F₃ transition, the terbium complexes did not exhibite the characteristic fluorescence (green), but strong red fluorescence. The reason why terbium complexes exhibit the red fluorescence was investigated in the paper by studying the triplet state of ligands, the energy level transitions of complexes and the aggregation state of particles.

Key words：Terbium complexes;Red fluorescence;Dibenzoylmethane;1;10-phenanthroline

Received: 2010-05-10 Accepted: 2010-08-20

ZTFLH:

O644.1

Corresponding Authors: ZHAO Yong-liang E-mail: hxzhaoyl@163.com

Cite this article:

DU Yan,ZHAO Yong-liang,FU Xiao-tao, et al. Synthesis and Fluorescence Properties of Complexes of Terbium with Red Fluorescence [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(01): 158-161.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2011)01-0158-04 OR https://www.gpxygpfx.com/EN/Y2011/V31/I01/158