三元配合物Tb(BA)3PIP的合成与发光性能研究

合成了一1,10-种邻菲罗啉(phen)衍生物2-苯基-咪唑并[4,5-f]-1,10-邻二氮杂菲(PIP),并以其作为第二配体,苯甲酸(HBA)为第一配体,合成了新的稀土Tb3 三元有机配合物Tb(BA)3PIP。采用元素分析、红外分析对合成的配体PIP及配合物的组成和结构进行了表征。结果表明,稀土Tb3 分别与苯甲酸配体的六个氧原子和第二配体PIP的两个氮原子配位。研究了其紫外光谱和荧光光谱。结果表明,在200~400nm区域内三元配合物对紫外光有强烈吸收,荧光光谱研究表明,在紫外光激发下,配合物中的配体可将吸收的能量传递给稀土离子,表现出较强的稀土Tb3 离子的特征发射,合成的第二配体对中心离子具有较好的敏化发光作用。

Synthesis and Fluorescent Properties of a Ternary Complex Tb(BA)3 PIP

1,10-Phenanthroline(phen)derivative,2-Phenyl-imidazo1,10-Phenanthroline(PIP) was synthesized.With benzoic acid(HBA) as the first ligand and PIP as the secondary ligand,a new ternary organic Tb3 complex Tb(BA)3PIP was prepared.The structure and composition of the ligand PIP and the complex were confirmed by elemental analysis and IR spectra.The results indicated that rare earth Tb3 ion is coordinated with six oxygen atoms of three benzoic acid ligands and two nitrogen atoms of the second ligand PIP.UV-visible absorption spectra and the fluorescence spectra of the complex were studied.Fluorescence spectra demonstrated that energy absorbed by the Ligands in the complex can be transmitted to the rare earth Tb3 ion so that it can emit characteristic fluorescence of rare earth Tb3 ion under UV excitation and the second ligand PIP can greatly sensitize the fluorescence of complex.