2007•Journal of Zhuzhou Teachers CollegeRequires access
Syntheses and Fluorescent Properties of Complexes of Eu(III)/Gd(III) with Benzoic Acid,2-thienyitrifluoroacetonate and Phenanthroline
Xiao Xi-mei
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Abstract
A series of Eu(Ⅲ)/Gd(Ⅲ)complexes of benzoic acid(BA),2-thienyhrifluoroacetonate (HTTA)and Phenanthroline(Phen)are synthesized.Compositions of these complexes are revealed to be Eu_(1-x)Gd_x(BA)(TTA)_2Phen(x=0～1).Their IR spectra and fluorescent spectra are studied.The fluorescent excitation spectra of these complexs show broader excitation band and a peak position blue shift than that of Eu(TTA)_3Phen corresponding to their formation.The fluorescence enhancement of cofluorescence Gd~(3+)ions to the Eu(Ⅲ)complexes is clear.The optimum concentration of Gd~(3+)is 0. 4(molar fraction).The intermolecular transfer between Gd(BA)(TTA)_2 Phen and Eu(BA)(TTA)_2 Phen appears to be responsible for the fluorescence enhancement of Eu_(1-x)Gd_x(BA)(TTA)_2Phen.