Combination of Hydrazofurazan and Triazole Rings for Good Detonation Performance and Low Sensitivity

To achieve a balance between detonation properties and molecular stability, a series of compounds bridged by a hydrazo group have been synthesized in this work. The compounds involved were characterized by NMR spectroscopy (1H and 13C), IR spectroscopy, and differential scanning calorimetry (DSC). The molecular structures of salts 3 and 4 were confirmed by single-crystal X-ray diffraction. The combination of hydrazo-bridged furazan and 3,4-diamino-1,2,4-triazole greatly improves the thermal stability and sensitivity. Notably, the perchlorate salt 4 shows excellent thermal stability (Td = 288.7 °C) and detonation performance (8400 m s–1, 30.8 GPa), which are superior to those of FOX-12. They all exhibit lower impact sensitivities and friction sensitivities (IS > 40 J, FS > 360 N) than most furazan derivatives bridged by different links, showing the potential to be new high-energy and insensitive candidates.