Eco-friendly energetic complexes based on transition metal nitrates and 3,4-diamino-1,2,4-triazole (DATr)

摘要

Four nitrate-containing metal complexes based on 3,4-diamino-1,2,4-triazole are described as eco-friendly energetic coordination compounds. Their synthesis, characterization, and some energetic properties are studied. The figure reveals the crystal structure of zinc (II) complex and also suggests the coordination mode of metal complexes. Four eco-friendly energetic metal complexes of 3,4-diamino-l,2,4-triazoie (DATr), including manganese (T), cobalt (2), nickel (3), and zinc (4), were synthesized by reacting DATrHCI with the corresponding metal (Mn(II), Co(II), Ni(II), and Zn(II)) nitrate in aqueous solution and characterized by using Fourier transform-infrared spectroscopy and elemental analyses. The single crystals of 2, 3, and 4 were obtained and determined by X-ray single-crystal diffraction analysis. All three complexes crystallize in the monoclinic crystal system and belong to P2(1) space group. The thermal decomposition processes were investigated by differential scanning calorimeter (DSC) and thermogravime-try-derivative thermogravimetry analyses. The results show that the decomposition temperatures of 1-4 are above 260 °C, depending upon their onset DSC peaks. It can be predicted that these complexes based on 3,4-diamino-1,2,4-triazole have good thermal stability. The nonisothermal kinetic parameters of decomposition were calculated by using Kissinger and Ozawa-Doyle's methods. Furthermore, the sensitivities of these complexes to impact, friction, and flame were determined. Sensitivity tests revealed that 2 was more sensitive to external stimuli compared to the other three complexes.