Preparation, Crystal Structure, and Thermal Analysis of Two Energetic Salts Based on Nitro Phenolic Compounds with Diamino-glyoxine

As a key research objective for environmentally friendly energetic materials, energetic salts without heavy metal have received wide attention. The energetic salts DAG·PA·H₂O (1) and DAG·TNR·H₂O (2) were synthesized by using diamino-glyoxine (DAG) and picric acid (PA) or 2, 4,6-trinitro-resorcinol (TNR) as raw materials, and their structures were characterized by elemental analysis, FT-IR,¹H NMR, and¹³C NMR spectroscopy. Single crystals of the title salts were cultured and their structures were determined by X-ray single-crystal diffraction. Both salts belong to the triclinic space group P1 with density values of 1.764 and 1.751 g·cm^–3, respectively. The thermal decomposition behaviors of both salts were investigated by differential scanning calorimetry (DSC), the non-isothermal kinetic parameters and the critical temperature of thermal explosion were calculated. The heats of formation for the salts were also determined through the combustion heats date measured by using the oxygen bomb calorimetry. In addition, the detonation pressure (P) and detonation velocities (D) of the salts were predicted by using the K-J equations, and their sensitivities towards impact and friction were tested. The results indicated that the title salts have potential applications in the field of energetic materials.