8-羟基喹啉基稀土络合物的近红外发光研究  

NIR-Luminescence of 8-Hydroxyquinoline-Based Rare Earth Complexes

作　　者：罗建新[1] 张春燕[1] 李昶红[1] 王文革[1] 胡汉祥[1] 胡波年[1] 

机构地区：[1]湖南工学院材料与化学工程学院

出　　处：《中国稀土学报》2013年第1期49-54,共6页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(21176061);湖南省科技计划项目(2011FJ3223);湖南工学院科学研究项目(HY11022);湖南省重点学科建设项目资助

摘　　要：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。The several 8-hydroxyquinoline-based rare earth（Re） complexes,such as ErQ2,ErQ3,ErQ4,NdQ4 and YbQ4,were prepared through coordination reaction.The structure and the properties of these complexes were studied by elemental analysis,Fourier transform infrared spectroscopy（FT-IR）,UV-vis Absorption spectra and fluorescence spectra.After ligand-mediated excitation,all of these complexes showed the characteristic NIR-luminescence of rare earth ions.While increasing the number of 8-hydroxyquinoline,the quantum efficiencies（φ） and average lifetimes（τ） of the complexes increased,but the rate constant of non-radiative deactivation decreased.The full width at half maximum（FWHM） of Er-complexes was wide,which enabled a wide gain bandwidth for optical amplification.However,the quantum efficiency of ErQ4 was less than that of NdQ4 and YbQ4,indicating that 8-hydroxyquinoline was not more efficient for Er ion than that for Nd and Yb ions.

关 键 词：稀土 8-羟基喹啉 近红外发光 效率 寿命 

分 类 号：O614.33[理学—无机化学] O616[理学—化学]