Abstract
Abstract The reactions of 2-(pyridine-3-yl)-1H-4,5-imidazoledicarboxylic acid (H3PyIDC) with different main group metal ions affords five coordination polymers, namely [Ca(HPyIDC)(H2O)2]n (1), [Ba(H3PyIDC)2Cl2]n (2), [Pb(H2PyIDC)2(H2O)2]n (3), {[Mg3(HPyIDC)2(H2O)10]·Cl2}n (4) and {[Mg(HPyIDC)(H2O)]·CH3OH}n (5). Both complexes 1 and 2 are one-dimensional chain structures, but with different connection modes. Complex 1 is constructed by alternate bridges of Ca(II) ions and μ3-HPyIDC2− anions, whereas the metal centers of complex 2 are bridged by μ2-HPyIDC2− ligands. Complex 3 possesses a two-dimensional grid-like network consisting of four-connected Pb(II) ions and two-connected μ2-H2PyIDC− anions. Complex 4 has a two-dimensional honeycomb-like network structure, which is composed of μ3-HPyIDC2− ligands and Mg(II) ions. In complex 5, the extended Mg(II)-carboxylate 1D zigzag chains are connected by pyridyl nitrogen atoms of HPyIDC2− ligands to form a three-dimensional open framework. The thermal stabilities of complexes 1, 3–5 and solid-state luminescent properties of complexes 1–5 have been investigated.
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