A study on the NIR-luminescence emitted from ternary lanthanide [Er(III), Nd(III) and Yb(III)] complexes containing fluorinated-ligand and 4,5-diazafluoren-9-one
作者:Song Dang、Jiang-Bo Yu、Xiao-Fei Wang、Zhi-Yong Guo、Li-Ning Sun、Rui-Ping Deng、Jing Feng、Wei-Qiang Fan、Hong-Jie Zhang
DOI:10.1016/j.jphotochem.2010.06.019
日期:2010.8
were synthesized. Upon excitation at the maximum absorption of the ligands, the complexes all show the characteristic near-infrared (NIR) luminescence of the corresponding Ln3+ ions, which is due to efficient energy transfer from the ligands to the central Ln3+ ions via an antenna effect. Moreover, an indirect excitation model is proposed and the influence of ligands on the luminescence properties of the
Ln(tfnb)3 dafone,Ln(hfth)3 dafone和Ln(pfnd)3 dafone(Ln = Er,Nd和Yb)与氟化配体1-(2-萘基)-4,4,的镧系元素络合物4-三氟-1,3-丁二酸(Htfnb),4,4,5,5,6,6,6-七氟-1-(2-噻吩基)己烷-1,3-二酮(Hhfth)和4,4 ,5,5,6,6,7,7,8,8,9,9,10,10,10-十五氟-1-(萘-2-基)癸烷-1,3-二酮(Hpfnd)用作分别合成了主要的敏化剂和作为协同配体的4,5-二氮杂芴-9-一(达芬酮)。在配体的最大吸收下激发时,复合物均显示相应Ln 3+离子的特征性近红外(NIR)发光,这是由于从配体到中心Ln 3+的有效能量转移离子通过天线效应。此外,提出了间接激发模型,并进一步讨论了配体对配合物发光性能的影响。