稀土-3-己烯二酸-1,10-邻菲咯啉三元配合物的合成,表征和荧光性能研究

SYNTHESIS AND CHARACTERIZATION OF TERNARY COMPLEXES OF RARE EARTH WITH 3-HEXENEDIACID AND 1,10-PHENANTHROLINE

以稀土氯化物、3-己烯二酸与1,10-邻菲咯啉为原料,在乙醇溶液中合成了稀土(Sm3+、Eu3+、Tb3+、Dy3+)的三元配合物,通过元素分析,EDTA配位滴定分析、红外光谱测定,确定了其组成为RE2L3Phen.4H2O(RE=Eu3+、Tb3+、Sm3+、Dy3+,H2L=3-己烯二酸,Phen=1,10-邻菲咯啉).通过荧光光谱,测定了配合物的发光性能.荧光光谱测定结果表明,只有稀土Eu3+,Tb3+的三元配合物能发出强的特征荧光,表明这两个配合物中的配体能级与Eu3+,Tb3+离子很好匹配,能有效地将吸收的能量传递给稀土离子,并敏化稀土离子发光.

Ternary rare earth complexes RE2L3Phen · 4H2O （RE = Sm^3＋, Eu^3＋, Tb^3＋, Dy^3＋） have been synthesized through the reaction of rare earth chloride with 3-Hexenediacid （H2L） and 1,10- Phenanthroline （Phen） in alcohol. The composition and fluorescence properties of the complexes are characterized by means of elemental analysis,complex titration, IR and fluorescent spectra. Results show that the fluorescent intensity of the ternary rare earth （Eu and Tb） complexes is greatly enhanced by the ligands, which have the ability of sensitizing the luminescene of Eu^3＋ and Tb^3＋. Fluorescent intensity of the other two ternary rare earth （Sm and Dy） complexes is rather weak,which means that the ligands cannot well sensitize the luminescence of Sm^3＋ and Dy^3＋ to give out intense fluorescence.