Sythesis, Characterization And Studies On Fluorescence Property Of Rare Earth With Complexes Phenoxy Acetic Acid And 1,10-Phenanthroline

Two series of ten solid complexes of rare earth chloride and eight different proportional co-doped solid complexes(Tb³⁺:Y³⁺) with phenoxyacetic acid and 1,10-phenanthroline have been synthesized and characterized.Elemental analysis,rare earth coordination titration and TG-DTA studies show that the complexes have the composition of RE(POA)aphen·1/2H₂O (RE³⁺=Eu³⁺,Tb³⁺,Sm³⁺,Dy³⁺);Tb_0.5Ln_0.5(POA)₃phen·1/2H₂O(Ln³⁺=La³⁺,Y³⁺,Gd³⁺);Eu_0.5Y_0.5(POA)₃phen·1/2H₂O;Eu_0.5La_0.5(POA)₃phen·1/2H₂O; Eu_0.5Gd_0.5(POA)₃phen·1/2H₂O;(Tb_x:Y_y)(POA)₃phen·1/2H₂O(0.10:0.90;0.20:0.80; 0.30:0.70;0.40:0.60;0.60:0.40;0.70:0.30;0.80:0.20;0.90:0.10).The molar conductivity indicates that all the complexes are none-lectrolyte;IR spectra and ¹HNMR spectra show that the ligands coordinate with RE³⁺ ions though the oxygen atoms of phenoxyacetic acid and phenoxy,and two nitrogen atoms of 1,10-phenanthroline. Flourescence spectra show that the fluorescence intensity of the series Tb³⁺ complexes are much higher than of the Eu³⁺ complexes.However,Flourescence lifetime shows that the decay time of Eu³⁺ complexes are longer than that of the series of Tb³⁺ complexes;The strongest fluorescence intensity was studied in this article according to different proportional doped rare earth ions.