Synthesis, structural characterization and thermal analysis of a high nitrogen-contented cadmium (II) coordination polymer based on 1,5-diaminotetrazole

A high nitrogen-contented cadmium (II) coordination polymer [Cd(DAT)2(N3)2]n (DAT=1,5-diaminotetrazole) has been synthesized and characterized by elemental analysis and FT-IR spectrum. The crystal structure was determined by using single crystal X-ray diffraction analysis with monoclinic cell: P21/n space group. Each Cd(II) cation is coordinated by two trans 1,5-diaminotetrazole ligands and four trans μ-1, 3 azido bridged ligands to form an octahedral configuration. The molecule structure is novel in that two zigzag chains linked by azido ligands which are vertical to each other and thus 2D layer networks are formed. The weak hydrogen-bonds between different layers assemble the complex to 3D supramolecular structure. Under nitrogen atmosphere with a heating rate of 10°C/min, the DSC plot of the complex shows one endothermic process and three successive exothermic processes from 50°C to 600°C, and the final decomposed residue at 600°C is Cd and few condensed products.