硝基氰酰胺乙烯基咪唑过渡金属配合物：合成、结构和性能

In order to explore energy combustion catalyst for solid propellant,four new coordination compounds were synthesized using nitrocyanamide(NCA) as anion, 1-vinylimidazoleCVIM) as ligand and transition-metal Mn, Co, Ni and Cu as central ions. Their structures formula were [Mn(VIM)4](NCA)2 (complex 1), [Co(VIM)4] (NCA)2 (complex 2), [Ni(VIM)4] (NCA) 2 (complex 3),and [Cu(VIM)4](NCA)2 (complex 4). The structure and physicochemical properties of the compounds were characterized by elemental analysis, infrared spectroscopy (IR), X-ray crystal diffraction (XRD), sensitivity test and oxygen bomb calorimetry. The thermal decomposition of the energetic complexes were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The catalytic effect of complex 1—complex 4 on the thermal decomposition of ammonium perchlorate (AP) was investigated by DSC. The results showed that complex 1—complex 4 have high energy density, in which mass energy density and bulk energy density are 19. OOkJ/g and 27. 18kJ/cm3 of complex 2. The friction sensitivity of the four complexes was greater than 288 N and the impact sensitivity of the four complexes was greater than 40J. The high temperature decomposition temperature of AP samples with 5% catalyst was advanced, and the heat release was significantly increased. Among them, complex 2 showed the best catalytic performance. The AP heat release of complex 2 increased to 1 564J/g and the decomposition temperature advanced by 62.0°C. The activation energy decreased to 142.9k|/mol, indicating that complex 2 has the potential as a catalyst for energetic combustion of solid propellant.