Construction of Four Coordination Polymers based on 2‐[4‐(Pyridine‐4‐yl)phenyl]‐1H‐imidazole‐4,5‐dicarboxylic Acid |
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| Authors: | Song‐Liang Cai Sha Wang Zi‐Hao He Kai Zhang Mei‐Lin Li Jun Fan Sheng‐Run Zheng Wei‐Guang Zhang |
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| Affiliation: | 1. School of Chemistry and Environment, South China Normal University, Guangzhou, P. R. China;2. Guangdong YanJie Pharmatech Co. Ltd., Guangzhou, P. R. China |
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| Abstract: | The imidazole‐based dicarboxylate ligand 2‐(4‐(pyridin‐4‐yl)phenyl)‐1H‐imidazole‐4,5‐dicarboxylic acid (H3PyPhIDC), was synthesized and its coordination chemistry was studied. Solvothermal reactions of CaII, MnII, CoII, and NiII ions with H3PyPhIDC produced four coordination polymers, Ca(μ3‐HPyPhIDC)(H2O)2]n ( 1 ), {M3(μ2‐H2PyPhIDC)2(μ3‐HPyPhIDC)26(H2O)2] · 6H2O}n M = Mn ( 2 ), Co ( 3 )], and {Ni(μ3‐HPyPhIDC)(H2O)] · H2O}n ( 4 ). Compounds 1 – 4 were analyzed by IR spectroscopy, elemental analyses, and single‐crystal and powder X‐ray diffraction. Compound 1 displays a one‐dimensional (1D) infinite chain. Compounds 2 and 3 are of similar structure, showing 2D network structures with a (4,4) topology based on trinuclear clusters. Compound 4 has another type of 2D network structure with a 3‐connected (4.82) topology. The results revealed that the structural diversity is attributed to the coordination numbers and geometries of metal ions as well as the coordination modes and conformations of H3PyPhIDC. Moreover, the thermogravimetric analyses of all the compounds as well as luminescence properties of the H3PyPhIDC ligand and compound 1 were also studied. |
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| Keywords: | Coordination polymer Imidazole‐based dicarboxylate ligand Crystal structure Luminescence |
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