论文部分内容阅读
以8-羟基喹啉(Q)作为配体,通过控制配位反应条件,制备了二配体(ErQ2),三配体(ErQ3)和四配体(ErQ4,NdQ4和YbQ4)的8-羟基喹啉基稀土络合物,并用元素分析、红外光谱、紫外-可见吸收光谱和荧光光谱对其结构和性能进行了研究。通过激发配体,络合物均发射稀土离子的特征近红外光;随着配体数目的增加,络合物的近红外发光效率和寿命均增加,非辐射衰减速率常数减少。研究结果表明,稀土离子的近红外发光是通过8-羟基喹啉敏化产生的,并且8-羟基喹啉对铒离子的敏化不如对钕离子和镱离子的有效。
By using 8-hydroxyquinoline (Q) as a ligand, the 8-hydroxyl group of ErQ2, triplener (ErQ3) and tetramer (ErQ4, NdQ4 and YbQ4) Quinolinolato complexes, and its structure and properties were studied by elemental analysis, IR, UV-Vis and fluorescence spectroscopy. By exciting the ligands, the complexes all emit the characteristic near-infrared light of rare-earth ions. With the increase of the number of ligands, the near-infrared luminescence efficiency and lifetime of the complexes increase, and the non-radiative decay rate constant decreases. The results show that the near-infrared luminescence of rare earth ions is generated by the sensitization of 8-hydroxyquinoline, and the sensitization of 8-hydroxyquinoline to erbium ions is not as effective as neodymium ion and ytterbium ion.