Triazole And Zinc / Cobalt Coordination Polymer Synthesis, Structure And Nature Of The Characterization

The triazoles are members of the polyazaheteroaromatic class of compounds such as pyrazole, imidazole, and tetrazole, which are significant for their widespread use as bridging ligands. For 1,2,4-triazoles and their derivatives and anionic exhibit various coordination mode and moderate-field intensity, which distribute to coordination compounds with unusual structure and properties.In this paper, we used 1H-1,2,4-triazole (Htrz), 1H-1,2,4-triazol-3-amine (Hatrz), 1H-1,2,4-triazole-3,5-diamine (datrz ), 3-amino-1H-1,2,4-triazole-5-carboxylic acid (H₂atc), and Zn (Ⅱ)/Co (Ⅱ) ions built two dimensional (2D) coordination polymer frameworks (subunits), employ the terminal ligand such as Cl^-, Br^-,I^-, SO₄^2-, SCN^-, pyrazine (pz), and 4,4'-bpy to increase the separations of the 2D interlayer, and regular the 3D structure of coordination polymer frameworks, via hydrothermal synthesis 13 kinds of triazolate and zinc/cobalt coordination polymers have obtained. They are determined by single, crystal X-ray diffraction, and characterized by elemental analysis, IR spectroscopy and TG-DSC techniques. The fluorescence properties of some coordination polymer are analysis.With the outward-ligand increased, H₂O molecules are successfully included between 2D layers, and to a certain extent, the structure regulation of 3D polymers are achieved. Heterogeneity has the isomorphism coordination polymer 6·X vs 1·X(X = Br^-, I^-)and 8·(NO₃)₂·6H₂O vs 4·(NO₃)₂·6H₂O are obtained.Due to people are much interested in structural and other physical and chemical properties of metal-triazolate coordination polymer than the nature of its high-energy side, making such coordination polymer itself as a kind of high-nitrogen energetic materials in the promotion of high-energy propellant catalytic decomposition area few studies. Coordination Polymers [Zn(atrz)SCN]_n·nH₂O (2 = ZnTS), [Zn₅(atrz)₆(μ₂-O)]_n(NO₃)_2n-6nH₂O (4 = ZnTO), [Co₅(atrz)₇(N₃)₃]_n(7 = CoTN) and [Co₅(atrz)₆(μ₂-O)]_n(NO₃)_2n·6nH₂O (8 = CoTO), bear high-nitrogen energetic (especially CoTN, N 51.54 %ΔH -2804 J·g^-1), equipment and environment friendly (Excl. Cl, Br, I and other halogen elements, excl. Pb and other heavy metals) and other advantages. These four polymers and their propellant mixture (binary component system) are characterized by DSC technology, compared to the parameters of thermal decomposition characteristics of mixed system and those of the propellant components alone, are summarized the polymers impact on the trend of propellant thermal decomposition. With a view to the experimental results provided the basis experimental support for such coordination polymers in the application of propellant.