Synthesis, structure, and photoluminescence of a zinc(II) coordination polymer with 4-(tetrazol-5-yl)benzoate

A new coordination polymer with interesting supramolecular architecture, [Zn(4-tzbz)] _n (1) (4-tzbz = 4-(tetrazol-5-yl)benzoate), has been synthesized and characterized structurally. In this compound, the zinc(II) ions are connected by the tetrazole ring in the μ₂-1,4 bridging mode and the carboxylate group in the μ₂-1,3 syn-anti bridging mode to generate 2D (4,4) sheets, and the adjacent sheets are linked further by the benzene rings to give the 3D metal-organic framework with a 3,4-connected (8³)(8⁴12²) topology. This compound in the solid state exhibits photoluminescence assignable to intraligand transitions, and, in particular, the emission at 400 nm is significantly intensified due to the coordination of the ligand to Zn.