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Photoluminescence properties of dinuclear lanthanide complexes in visible and near-infrared region

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【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；

【Author】 ZHOU Yonghui 1,2, CHEN Mindong 1, GUO Shengli 1, XU Jianqiang 1, GAO Guizhi 1, KONG Qinggang 1, HE Gang 1, LI Jun 1, MA Yan 1, GUO Yan 1, ZHENG Youxuan 2 (1. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2. State Key Labortory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China)

【机构】 School of Environmental Science and Engineering, Nanjing University of Information Science & Technology； 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.更多还原

【Abstract】 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.更多还原

【关键词】 tetrapyrido(3,2-a’, 3’-c’, 2"-h"’, 3’"-j) phenazine； β-diketone； dinuclear lanthanide complex； characteristic luminescence；
【Key words】 tetrapyrido(3,2-a’, 3’-c’, 2"-h"’, 3’"-j) phenazine； β-diketone； dinuclear lanthanide complex； characteristic luminescence；

【基金】 Project supported by the National Natural Science Foundation of China (20701019, 20971067, 20721002);the Natural Science Foundation of Ji-angsu Province (BK2008257);the Major State Basic Research Development Program (2006CB806104, 2007CB925103)

【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2010年05期

【分类号】O641.4
【被引频次】3
【下载频次】103

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