新型三元配合物Tb(DPAB)3IP的制备与发光性能

合成了邻菲罗啉的衍生物咪唑并[5,6-f]邻菲罗啉(IP),并以其为第二配体,二苯胺羰基邻苯甲酸(HDPAB)为第一配体,制备出新型稀土铽三元有机配合物Tb(DPAB)3IP。采用元素分析、红外光谱和紫外光谱对合成的配体及配合物进行了表征。通过荧光光谱研究了配合物的荧光性质,结果表明第二配体IP有较大的共轭体系,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Tb3+离子,表现出较强的Tb3+离子的特征发射,且配体Tb(DPAB)3IP的荧光强度明显大于Tb(DPAB)3phen的荧光强度。这说明适宜的第二配体对配合物有很好的敏化发光作用,合成的Tb(DPAB)3IP是一种良好的绿光材料。

Synthesis and Photoluminescent Property of A Novel Tb(DPAB)3IP Complex

In this paper, imidazo phenanthroline(IP) and 2-diphenylamine carbonyl benzoic (HDPAB) were synthesized. Then HDPAB was used as the first ligand and IP as the secondary ligand, a new ternary organic terbium complex Tb(DPAB)3IP was prepared. In the same condition, with the same first ligand, Tb(DPAB)3phen was prepared where phen as the second ligand. The structures and compositions of the ligands and ternary complexes were confirmed by elemental analysis, IR spectra and UV spectra, the fluorescence properties of the two terbium complexes were also studied. Elemental analysis demonstrated that the compositions of the ternary complexes were Tb(DPAB)3IP and Tb(DPAB)3phen. IR spectra indicated that rare earth Tb3+ ion coordinated with six oxygen atoms of three benzoic acid ligands and two nitrogen atoms of the second ligand. UV spectra showed that the main absorption was from HDPAB in the ternary complex.Fluorescence spectra demonstrated that two kinds of ternary organic terbium complexes could emit characteristic fluorescence of rare earth Tb3+ and the second ligand IP had stronger conjugation system. With the excitation of ultraviolet, the energy absorbed by the ligands in the complexes could be transfered to the rare earth Tb3+ ion,so they could emit characteristic fluorescence and the fluorescence intensity of Tb(DPAB)3IP was obviously higher than that of Tb(DPAB)3phen. Thus the appropriate secondary ligand of imidazo Phenanthroline (IP) obviously enhanced the fluorescent intensity of terbium complex. So, the new ternary organic terbium complex of Tb(DPAB)3IP is an excellent green-emitting material.