Abstract
The title compound, [CdNa2(C8H4O4)2(C3H7NO)(H2O)2] n or [CdNa2(1,3-bdc)2(DMF)(H2O)2] n , is a new CdII-NaI heterobimetallic coordination polymer. The asymmetric unit consists of one CdII atom, two NaI atoms, two 1,3-bdc ligands, two coordinated water mol-ecules and one coordinated DMF mol-ecule. The CdII atom exhibits a seven-coordinate geometry, while the NaI atoms can be considered to be penta-coordinate. The metal ions and their symmetry-related equivalents are connected via chelating-bridging carboxyl-ate groups of the 1,3-bdc ligands to generate a three-dimensional framework. In the crystal, there are classical O-H⋯O hydrogen bonds involving the coordinated water mol-ecules and the 1,3-bdc carboxyl-ate groups and π-π stacking between the benzene rings of the 1,3-bdc ligands present within the frameworks.
Highlights
1,3-bdc ligands to generate a three-dimensional framework
Among the most common ligands in this class, the rigid and planar backbone of benzene dicarboxylates such as benzene-1,3-dicarboxylic acid (1,3-H2bdc) and benzene-1,4dicarboxylic acid (1,4-H2bdc) are widely employed in the construction of these solids owing to their rich coordination modes
With the aim of searching for new members of this heterobimetallic metal–organic frameworks (MOFs) system containing benzene-1,3-dicarboxylic acid (1,3-bdcH2), we explored mixed sources of ZnII/CdII–NaI with this ligand
Summary
Porous coordination polymers or metal–organic frameworks (MOFs) constructed from d10 transition metals and benzene polycarboxylate bridging ligands have been widely studied (Yaghi et al, 1999; Lin et al, 2008; Seco et al, 2017) due to the varieties of coordination framework topologies and potential applications in gas adsorption (Suh et al, 2012), photoluminescence (Wang et al, 2012) and photocatalysis (Wu et al, 2017). The members of three-dimensional coordination framework heterobimetallic ZnII or CdII /NaI MOFs with benzenepolycarboxylate ligands are still limited; previous reports include [ZnNa(1,2,4btc)] where 1,2,4-btc = benzene-1,2,4-tricarboxylate (Wang et al, 2004), [Zn2Na2(1,4-bdc)3(DMF)2(m-H2O)2] where 1,4bdcH2 = benzene-1,4-dicarboxylic acid (Xu et al, 2004),. With the aim of searching for new members of this heterobimetallic MOFs system containing benzene-1,3-dicarboxylic acid (1,3-bdcH2), we explored mixed sources of ZnII/CdII–NaI with this ligand.
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