邻菲绕啉对Tb（Ⅲ）、Eu（Ⅲ）水杨酸二元配合物荧光强度的影响研究

EFFECTS OF PHEN ON THE LUMINESCENCE OF Eu￣(3+) AND Tb￣(3+) COMPLEXES WITH SAL

通过分析邻菲绕啉与Ｔｂ（Ⅱ）、Ｅｕ（Ⅱ）水杨酸二元、三元配合物的多种谱留数据、证实由于邻菲绕啉的最低三重态与Ｔｂ（Ⅱ）、Ｅｕ（Ⅱ）离子的第一激发态能级差的不同，使得邻菲绕啉够增强Ｅｕ（Ⅱ）离子的水杨酸二元配合物的荧光强度而减弱Ｔｂ（Ⅱ）离子的水杨酸二元配合物的荧光强度．

rnary complexes TbPhen2Sal2 and EuPhen2Sal2 were prepared. Their UV absorption spectra and fluorescence yields were compared with each other and with those of the binary complexes TbSal3,.H2O,TbPhen2Cl3 and EuSal3.H2O.The UV absorption spectra of the ternary complexes is dominated by the absorption of Phen.Hence the fluorescence properties of the ternary complexes are determined by the energy transfer from Phen to the rare earth ions.Fluorescence intensity of the Eu ternary complex is higher than that of the binary complex, while it is in contrast for Tb complexes. This result can be well explained by the difference in energy mismatch between the lowest triplet of Phen and the first excited rare earth state.