Approaching the Thermostability Limit of Nitrogen-Rich Heterocyclic Perchlorate-Based Energetic Materials

In recent years, driven by ever-increasing application of energetic materials in deep-seated mineral resource exploitation and aerospace engineering, the mining of advanced safe energetic materials with significant thermal stability has drawn widespread publicity. Here, a tricyclic bridged energetic compound 2-amino-4,6-bis(3,5-diamino-4-nitropyrazol-1-yl)-1,3,5-triazine (NPX-03) was prepared using simple synthetic route. Furthermore, an interesting highly thermostable nitrogen-rich perchlorate, NPX-03·2HClO₄, was prepared by the self-assembly reaction of NPX-03 and HClO₄, displaying a thermal decomposition peak temperature of 375.9 °C. Moreover, NPX-03·2HClO₄ exhibits good detonation velocity (D = 8187 m s^-1) and insensitivity (IS = 50 J, FS > 360 N), thereby being promising candidates for advanced insensitive high-energy materials.