Synthesis and photophysical properties of NIR-emitting neodymium (III)-complexes containing fluorene and carbazole functionalized phenanthroline

Liu Yu; He Juan; Xing Kongqiang; Zhu Weiguo; Wang Yafei

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Synthesis and photophysical properties of NIR-emitting neodymium (III)-complexes containing fluorene and carbazole functionalized phenanthroline

Liu Yu 1 #,He Juan 1,Xing Kongqiang 2,Zhu Weiguo 1 *,Wang Yafei 1

1.The Department of Chemistry, Xiangtan University

2.Institute of Biological Science and Technology, Qionzhou College

*Correspondence author

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Funding: The authors are deeply grateful to the National Natural Science Foundation of China （No.Project No.20872124, 50973053 and 21172187), the specialized Research Fund for the Doctoral Program of Higher Education）

Opened online:21 December 2012

Accepted by: none

Citation: Liu Yu,He Juan,Xing Kongqiang.Synthesis and photophysical properties of NIR-emitting neodymium (III)-complexes containing fluorene and carbazole functionalized phenanthroline[OL]. [21 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4504974

Three novel neodymium (III) complexes of (G1G2FuPhen)Nd(TTA)3 with 2-thenoyltrifluoroacetone (TTA) ligand served as main sensitizers, and fluorene and/or carbazole-functionalized phenanthroline as the synergistic ligand were synthesized and characterized by elemental analysis, infrared spectroscopy and thermal analyses. These neodymium (III) complexes presented better thermal stability, and similar UV-vis absorption and photoluminescence spectra in dichloromethane. Two intense UV-vis absorption bands at around 272 nm and 343 nm, Upon excitation at the maximum absorption of the complexes, they all show the characteristic near-infrared (NIR) luminescence at about 880, 1060, 1330 nm of the corresponding Nd3+ ions, which is due to ef?cient energy transfer from the ligands to the central Nd3+ ions via an antenna effect. Moreover, the in?uence of ligands on the luminescence properties of the complexes is further discussed.

Keywords:Neodymium (III) complexes; Synthesis; Hole-transporting; Near-infrared luminescnece

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