Synthesis,structures, luminescent and dielectric properties of lanthanide coordination polymers |
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| Authors: | Xing-Xing Cao Qi-Jian Pan |
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| Institution: | School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, PR China |
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| Abstract: | Under hydrothermal conditions, four lanthanide coordination polymers were synthesized based on 4-(4,5-dicarboxy-1H-imidazol-2-yl)pyridine 1-oxide (H3DCImPyO), with the molecular forumulas Eu(HDCImPyO)·(H2O)2·(CHO2)]n (1), Sm(HDCImPyO)·(H2O)2·(HCO2)]n (2), {La(HDCImPyO)·(H2O)·(HCO2)]·O2}n (3) and {Y(HDCImPyO)·(C2O4)·(H2O)2]·H2O}n (4). With diverse coordination modes, they were further characterized by elemental analysis, infrared spectroscopy, dielectric measurement, and single-crystal X-ray structural analysis. Complexes 1 and 2 were isostructural and had similar structures with {44, 62} topology. Complex 1 exhibited strong fluorescent emission in the solid state at room temperature. In 3, HDCImPyO2? adopted μ4-kO, O′: kO′, O′′: O′′′: O′′′′ coordination to bridge four La(III) ions to form a 3-D framework with {4. 52}2{42. 510. 612. 7. 83} topology. In 4, both HDCImPyO2? ligands and Y3+ cations were simplified as linkers to form an interpenetrating 3-D framework with {413. 62}2{422. 66} topology. |
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| Keywords: | Hydrothermal conditions lanthanide dielectric properties fluorescence topologies |
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