A 3D-diamond-like tetrazole-based Zn(II) coordination polymer: Crystal structure, nonlinear optical effect and luminescent property

A tetrazole-based Zn(II) coordination polymer, [Zn(tzf)2]n 1 (Htzf = 1H-tetrazole-5-formic acid), was synthesized by reaction of ZnCl2 and Htzf, and structurally characterized by single-crystal X-ray diffraction. Polymer 1 features a 3D-diamond-like net formed by the linkage of Zn(II) atoms and tetrazole groups. The carboxylate O atoms in tzf ligand remain uncoordinated. Polymer 1 displays a second harmonic generation response, which is ca. 1.1 times that of KDP (KH2PO4). The photoluminescent analysis reveals that 1 exhibits strong blue emission resulting from intraligand charge transition.