A two‐dimensional layered Cd II coordination polymer with a three‐dimensional supramolecular architecture incorporating mixed multidentate N ‐ and O ‐donor ligands

The combination of N‐heterocyclic and multicarboxylate ligands is a good choice for the construction of metal–organic frameworks. In the title coordination polymer, poly[bis{μ 2 ‐1‐[(1 H ‐benzimidazol‐2‐yl)methyl]‐1 H ‐tetrazole‐κ 2 N 3 : N 4 }(μ 4 ‐butanedioato‐κ 4 O 1 : O 1′ : O 4 : O 4′ )(μ 2 ‐butanedioato‐κ 2 O 1 : O 4 )dicadmium], [Cd(C 4 H 4 O 4 )(C 9 H 8 N 6 )] n , each Cd II ion exhibits an irregular octahedral CdO 4 N 2 coordination geometry and is coordinated by four O atoms from three carboxylate groups of three succinate (butanedioate) ligands and two N atoms from two 1‐[(1 H ‐benzimidazol‐2‐yl)methyl]‐1 H ‐tetrazole (bimt) ligands. Cd II ions are connected by two kinds of crystallographically independent succinate ligands to generate a two‐dimensional layered structure with bimt ligands located on each side of the layer. Adjacent layers are further connected by hydrogen bonding, leading to a three‐dimensional supramolecular architecture in the solid state. Thermogravimetric analysis of the title polymer shows that it is stable up to 529 K and then loses weight from 529 to 918 K, corresponding to the decomposition of the bimt ligands and succinate groups. The polymer exhibits a strong fluorescence emission in the solid state at room temperature.