不同有机酸配体对Tb(Ⅲ)离子荧光效率的影响

Effects of Different Ligands on the Fluorescence Intensity of Tb(Ⅲ)

对合成的七种Tb-配合物的荧光发射光谱和激发光谱进行了比较研究,重点比较了七种Tb-配合物的荧光强度,并从配体结构、能量传递和能级匹配等方面分析了不同配体对Tb(Ⅲ)离子荧光效率的影响,同时讨论了七种Tb-配合物的红外光谱和拉曼光谱。研究表明,配体不影响Tb(Ⅲ)离子的特征发射峰位置,只影响其荧光效率。配体的共轭性、刚性越好,配合物荧光效率越高,二元酸比一元酸更有利于增强Tb(Ⅲ)离子的荧光效率。

The excitation and emission spectra of seven Tb^3＋ complexes were measured and investigated, especially by comparing their fluorescence intensities. The effect of different ligands on the fluorescence intensity of Tb^3＋ was analyzed in terms of ligand structure, energy transfer and energies matching. The result indicates that ligands do not influence the positions of characteristic emission peaks of Tb^3＋ , but the emission intensity. The research shows that the better the conjugative effect and rigidity of the ligand, the stronger the fluorescence intensity of the complex. In addition, binary acid strengthens the fluorescence intensity more efficiently than monoatomic acid. Eventually, the IR and Raman spectra of seven complexes of Tb were discussed.