In situ hydrothermal syntheses, crystal structures and luminescent properties of two novel zinc(II) coordination polymers based on tetrapyridyl ligand |
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| Authors: | Juan Song Lei Gou Qing-Ran Wu Xiao-Le Yang Yi-Qing Shangguan Fa-Xin Dong Gang-Lin Xue |
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| Affiliation: | Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, China |
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| Abstract: | Two novel Zn(II) coordination polymers, [Zn(2-pytpy)(fum)]n·nH2O (1) and [Zn6(4-pytpy)3(mal)4]n·5n(H2O) (2), (2-pytpy = 4′-(4-pyridyl)-2,2′:6′,2″-terpyridine, 4-pytpy = 4′-(4-pyridyl)-4,2′:6′,4″-terpyridine, H2fum = fumaric acid and H2mal = malic acid) have been hydrothermally synthesized and structurally characterized. Notably, in situ ligand reactions occur in the formation of complexes 1 and 2, in which maleic acid is converted into fumaric acid and malic acid, respectively. Complex 1 is a 1D infinite chain structure, which is extended into a supramolecular layer by intermolecular π…π stacking interactions. Complex 2 is a 3D network structure, in which the bidentate-bridging 4-pytpy ligands link the layers based on the tetranuclear Zn(II) subunits to form the (4,10)-connected network. The luminescent properties of 1 and 2 have been investigated with emission spectra and UV-Vis diffuse reflectance spectra in the solid state. Additionally, these two complexes possess great thermal stabilities. |
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| Keywords: | Zinc 4&prime -(4-Pyridyl)-terpyridine In situ hydrothermal synthesis Crystal structure Luminescent property |
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