| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1337676 | Polyhedron | 2012 | 8 Pages |
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.
Graphical abstractThe structural variation of five main group complexes is primary attributed to the coordination geometries of the metal ions, the various coordination modes of the H3PyIDC ligands and the anions. Moreover, the photoluminescent properties and thermal behaviors of selected complexes were investigated.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Five main group metal coordination polymers based on H3PyIDC were obtained. ► These complexes exhibited various networks from 1D chain to 3D framework. ► The H3PyIDC ligand displays various coordination modes. ► These complexes exhibit strong emissions, varying from violet-blue to green fluorescence.
