镧掺杂铕发光材料的合成、结构及光学性能

Synthesis, Structure and Spectroscopic Properties of La-doped Europium Luminescent Materials

摘要: 以2-羟基-6-甲基尼古丁酸(HA)、1, 10-菲咯啉(phen)为配体, 合成了五种新型镧掺杂铕的四元异核配合物, 并对其进行元素分析、红外光谱测试以及荧光分析。结果表明: 配合物的组成为 (EuxLay)A3phen·3H2O(x∶y=0.10∶0.90, 0.30∶0.70, 0.50∶0.50, 0.70∶0.30, 0.90∶0.10), 配体的羧基与稀土离子以螯合双齿配位; 镧对铕的配合物有荧光浓聚效应, 且随镧离子浓度的增加而加强; 五种配合物的荧光寿命比较接近, 均在1 ms左右。

Abstract: Five new La-doped europium complexes with 2-hydroxy -6-methylnicotinic acid(HA) and 1, 10-phenanthroline(phen) as ligand were synthesized and characterized by elemental analysis, FT-IR spectra and fluorometric analysis. The results show that the composition of the complexes was confirmed to be (EuxLay)A3phen·3H2O (x∶y=0.10∶0.90, 0.30∶0.70, 0.50∶0.50, 0.70∶0.30, 0.90∶0.10), and carboxyl of the ligand chelated with rare earth ions in chelating bidentate form. Lanthanum had an accumulative effect on europium complexes, which rose with the increase of lanthanum ions concentration. The measured fluorescence lifetime of five complexes were very similar and around 1 ms.