Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5402183 | Journal of Luminescence | 2011 | 6 Pages |
Abstract
Two novel ternary rare earth complexes LnL5Lâ²(ClO4)32H2O (Ln=Eu(III), Tb(III); L=bis(benzoylmethyl) sulfoxide, Lâ²=phen) were synthesized and characterized by elemental analysis, coordination titration analysis, molar conductivity, IR, TG-DSC,1H NMR and UV spectra. The fluorescence spectra illustrated that both the Eu(III) and Tb(III) ternary complexes displayed strong characteristic metal-centered fluorescence in solid state. After the introduction of the second ligand phen group, the relative emission intensities and fluorescence lifetimes of the ternary complex EuL5Lâ²(ClO4)32H2O (L=C6H5COCH2SOCH2COC6H5, Lâ²=phen) enhanced more obviously than that of the binary complex EuL5(ClO4)33H2O. This indicated that the presence of both organic ligands bis(benzoylmethyl) sulfoxide and the second ligand phen could sensitize fluorescence intensities of Eu(III) ions, and the introduction of phen group was resulted in the enhancement of the fluorescence properties of the Eu(III) ternary rare earth complexes. The phosphorescence spectra are also discussed.
Keywords
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Wen-Juan Chai, Wen-Xian Li, Xiao-Jun Sun, Tie Ren, Xiao-Yan Shi,