羧酸-含氮杂环稀土配合物的合成及荧光性能研究

Synthesis and Fluorescence Properties of Rare Earth Complexes Containing Carboxylic Acids and Heterocyclic Nitrogen

以3-氨基吡嗪-2-羧酸(ampca)为阴离子配体、以2,4,6-三吡啶基三嗪(TPTZ)和1,10-邻菲罗啉(phen)为中性配体分别合成了两对钐和镝配合物;以对苯二甲酸(PTA)和TPTZ为配体合成了铽配合物.对5种配合物进行了元素分析、红外光谱、紫外光谱的测定,推测配合物的组成分别为Dy(TPTZ)(ampca)3·3H_2O(1)、Sm(TPTZ)(ampca)3·3H_2O(2)、Dy(phen)(ampca)3·4H_2O(3)、Sm(phen)(ampca)3·4H_2O(4)和Tb(TPTZ)(PTA)1.5·3H_2O(5).测定了配合物的荧光强度及荧光寿命,结果表明Tb配合物发光强度和寿命明显高于Sm,Dy的配合物;中性配体TPTZ和Phen可以明显增强钐和镝配合物的发光,其中Phen的增强作用更大.

Two pairs of samarium and dysprosium complexes were synthesized using 3-aminopyrazine-2-carboxylic acid(Hampca)as anion ligands,2,4,6-Tri(2-pyridyl)-1,3,5-triazine(TPTZ)and 1-10-phenanthroline(phen)as neutral ligands.Terbium complex was synthesized by using(PTA)and TPTZ as ligands.The elemental analysis,IR and UV spectra for five complexes were carried out,and the composition of the complexes was deduced as follows:Dy(TPTZ)(ampca)3·3 H2 O(1),Sm(TPTZ)(ampca)3·3 H2 O(2),Dy(phen)(ampca)3·4 H2 O(3),Sm(phen)(ampca)3·4 H2 O(4),and Tb(TPTZ)(PTA)1.5·3 H2 O(5).The fluorescence intensity and lifetime of the complexes were determined and the results showed that the luminescence intensity and lifetime of Tb complex were significantly higher than those of Sm and Dy complexes.The luminescence of Sm and Dy complexes can be enhanced obviously by neutral ligand TPTZ and Phen,and the enhancement effect of Phen is greater.