Five high-nitrogen ion salts based on 4,5-Bis(1H-tetrazol-5-yl)-1H-Imidazole: Syntheses, structures and thermal properties

Five high-nitrogen ion salts were first synthesized with the nitrogen-rich ligand 4,5-bis(1H-tetrazol-5-yl)-1H-imidazole (H3BTI) and Guanidine Carbonate (G2CO3), Ethylenediamine (EDA), 1,2-Propanediamine (PN), Hydroxylamine Hydrochloride (HN), and were characterized by elemental analysis and Fourier transform infrared (FT-IR) spectroscopy. Their crystal structures were determined by applying X-ray single crystal diffraction. The results showed a large amount of π-π stacking action in their ligand anions. The thermal decomposition curves of five compounds were obtained by differential scanning calorimetry (DSC). The non-isothermal kinetic parameters of the exothermic process were calculated by Kissinger's and Ozawa's methods. Five compounds have relatively high exothermic peak temperatures and thermal explosion temperatures (Tb), which indicates excellent thermal stability and safety.