Syntheses, crystal structure and properties of two novel coordination polymers with the flexible tetrazole-1-acetic acid (Htza)

Two new coordination polymers, [Ag(tza)]∞ (1) (Htza=tetrazole-1-acetic acid) and [Cu(tza)2]∞ (2) have been prepared at room temperature and characterized by X-ray crystallography, IR, UV-vis, fluorescence spectra and magnetism analysis. Compound 1 exhibits extended helical chains through bridging ligand tza. The Ag···Ag interactions between the adjacent chains form a 3-D framework featuring the extended tza-connected Ag chains that obviously affect the photoluminescent property. Compound 2 features undulated layered structure with hourglass-shaped [Cu4(tza)4] as subunits with the weak ferromagnetic interactions between Cu(II) ions, which are further stabilized by inter-lamellar C-H···O hydrogen bonds in the resulting 3-D supramolecular framework. - Graphical abstract: Two novel coordination polymers, [Ag(tza)]∞ (1) and [Cu(tza)2∞ (2) have been prepared and characterized. Compound 1 features extended double-stranded helical chains. Compound 2 features undulated layered structure with hourglass-shaped [Cu4(tza)4] as subunits with the weak ferromagnetic interactions between Cu(II) ions