Synthesis, structures and luminescence properties of two new Zn(II) coordination compounds incorporating the 5-(4-pyridyl)tetrazolate spacer ligand

The hydrothermal reaction of ZnCl2 with 5-(4-pyridyl)tetrazole afforded the 2D metal–organic coordination framework [Zn(OH)(4-ptz)] (1) and the mononuclear complex [Zn(4-ptz)2(H2O)4]∙2(H2O) (2) [4-ptz = 5-(4-pyridyl)-tetrazolate]. Compound 1 consists of a zig-zag bidimensional network formed by rectangular (4,4) grid sheets. Molecules of 2 form a 3D extended network of hydrogen bonding involving water molecules and the tetrazolate ligand. In addition, compound 1 exhibits strong fluorescence at room temperature in the solid state.