Photoluminescence properties of dinuclear lanthanide complexes in visible and near-infrared region
来源期刊：JOURNAL OF RARE EARTHS2010年第5期
论文作者：周永慧 陈敏东 郭胜利 徐建强 高桂芝 孔庆刚 何刚 李俊 马嫣 郭彦 郑佑轩
文章页码：660 - 665
摘 要：Several dinuclear lanthanide complexes of Ln2（HTH）6TPPHZ (Ln=Eu, Sm, Er, Nd, Yb, Ho; TPPHZ=Tetrapyrido （3,2-a:2’,3’-c:3’,2"-h:2"’,3’"-j） phenazine; HTH=4,5,5,6,6,6-heptafluroro-1-（2-thienyl）hexane-1,3-dione were synthesized and their photoluminescence properties were investigated. After ligand-mediated excitation, all the complexes showed the characteristic luminescence of the corresponding Ln（III） ions in the visible and NIR regions attributed to energy transfer from the ligands to the metal center. For Eu2（HTH）6TPPHZ complex, the quantum efficiency was calculated as 9.6% with the major 5D0 lifetime （477.86 μs） by the equation Φ=τobs/τR, where τobs was observed luminescence lifetime and τR was radiative （or natural） lifetime （5 ms）, and 14.9% with air-equilibrated aqueous [Ru（bpy）3]（II）·2Cl- solution as a standard sample （Φstd=2.8%）, in CH2Cl2 solution at room temperature.
周永慧1,2，陈敏东1，郭胜利1，徐建强1，高桂芝1，孔庆刚1，何刚1，李俊1，马嫣1，郭彦1，郑佑轩2
1. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology2. State Key Labortory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University
摘 要：Several dinuclear lanthanide complexes of Ln2（HTH）6TPPHZ (Ln=Eu, Sm, Er, Nd, Yb, Ho; TPPHZ=Tetrapyrido （3,2-a:2’,3’-c:3’,2"-h:2"’,3’"-j） phenazine; HTH=4,5,5,6,6,6-heptafluroro-1-（2-thienyl）hexane-1,3-dione were synthesized and their photoluminescence properties were investigated. After ligand-mediated excitation, all the complexes showed the characteristic luminescence of the corresponding Ln（III） ions in the visible and NIR regions attributed to energy transfer from the ligands to the metal center. For Eu2（HTH）6TPPHZ complex, the quantum efficiency was calculated as 9.6% with the major 5D0 lifetime （477.86 μs） by the equation Φ=τobs/τR, where τobs was observed luminescence lifetime and τR was radiative （or natural） lifetime （5 ms）, and 14.9% with air-equilibrated aqueous [Ru（bpy）3]（II）·2Cl- solution as a standard sample （Φstd=2.8%）, in CH2Cl2 solution at room temperature.
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