Visible and near-infrared luminescence of polycatenated cationic pyridinone lanthanide networks  

作　　者：Yubo Shu Weisheng Liu 

机构地区：[1]Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,State Key Laboratory of Applied Organic Chemistry,College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China

出　　处：《Science China Chemistry》2016年第4期436-441,共6页中国科学（化学英文版）

基　　金：financially supported by the National Natural Science Foundation of China(21431002,91122007);the Specialized Research Fund for the Doctoral Program of Higher Education(20110211130002)

摘　　要：A series of isomorphic lanthanide coordination polymers [Ln（Ⅲ）（MBP）2（NO3）2（Br）- 2C3H60] [Ln=Eu, Tb, Er, Yb, and Gd; MBP=N,N＇-methylene-bis（pyridin-4-0ne）] featuring polycatenated sql cationic network and incorporated bromide counter ion were prepared. Their visible and near-infrared （NIR） luminescence properties were characterized by steady-state excitation and emission spectra, as well as luminescence lifetimes and quantum yields. The D2d dodecahedron coordination geometry causes visible light excitations and strongly monochromatic emissions. The external heavy-atom environment induces remarkable en- hancement on the NIR emissions. The sensitization processes are revealed by analyzing the electronic properties of MBP ligand.A series of isomorphic lanthanide coordination polymers [Ln(III)(MBP)_2(NO_3)_2(Br)?2C_3H_6O] [Ln=Eu, Tb, Er, Yb, and Gd; MBP=N,N′-methylene-bis(pyridin-4-one)] featuring polycatenated sql cationic network and incorporated bromide counter ion were prepared. Their visible and near-infrared(NIR) luminescence properties were characterized by steady-state excitation and emission spectra, as well as luminescence lifetimes and quantum yields. The D_(2d) dodecahedron coordination geometry causes visible light excitations and strongly monochromatic emissions. The external heavy-atom environment induces remarkable enhancement on the NIR emissions. The sensitization processes are revealed by analyzing the electronic properties of MBP ligand.

关 键 词：coordination network LANTHANIDE pyridinone LUMINESCENCE 

分 类 号：O634[理学—高分子化学]