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- W2912647775 abstract "Abstract Two new lanthanide-mercury complexes [Eu(HIA)2(H2O)2Hg2Cl5(IA)]nn(HgCl2)·2nH2O·nCl (1) and [Tb(HIA)2(H2O)2Hg2Cl5(IA)]nn(HgCl2)·2nH2O·nCl (2) (HIA = isonicotinic acid) have been prepared through hydrothermal reactions and structurally determined by single crystal X-ray diffraction. 1 and 2 are isostructural and have a two-dimensional (2-D) layer structure. Solid-state UV/Vis diffuse reflectance spectroscopy shows that there is a wide optical band gap of 3.42 and 3.44 eV for 1 and 2. Photoluminescence measurement of solid-state samples revealed that 1 and 2 exhibit red or green emission, respectively. The photoluminescence bands originate from the characteristic 4f-electron intrashell transitions of 5D1 → 7F1 and 5D0 → 7FJ (J = 1, 2 and 4) (Eu3+: J = 1, 2, 4) for 1, and 5D4 → 7FJ (Tb3+: J = 3, 4, 5, 6) for 2. Energy transfer mechanism is explained by the energy level diagram of the Eu3+ and Tb3+ ions and of the isonicotinic acid ligand. The complexes have CIE chromaticity coordinates of (0.59, 0.35) and (0.29, 0.48) for 1 and 2, respectively." @default.
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- W2912647775 date "2019-04-01" @default.
- W2912647775 modified "2023-10-12" @default.
- W2912647775 title "Structure and luminescence of two new mercury-lanthanide complexes" @default.
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- W2912647775 doi "https://doi.org/10.1016/j.ica.2019.02.006" @default.
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