Abstract
A series of isomorphic lanthanide coordination polymers [Ln(III)(MBP)2(NO3)2(Br)·2C3H6O] [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.
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Shu, Y., Liu, W. Visible and near-infrared luminescence of polycatenated cationic pyridinone lanthanide networks. Sci. China Chem. 59, 436–441 (2016). https://doi.org/10.1007/s11426-015-5497-4
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DOI: https://doi.org/10.1007/s11426-015-5497-4