Energetic-methylene-bridged azacyclic scaffolds: An approach in design, construction, and synthesis of energetic compounds

A series of novel energetic compounds bearing nitrogen-containing aromatic rings, synthesized through energetic methylene bridging, were prepared for the first time. By tuning the bonding sites, the energy levels of these energetic compounds were enhanced while their stability was maintained-their densities range from 1.80 g·cm⁻ ³ to 1.89 g·cm⁻ ³ , and their detonation velocities range from 8000 m·s ^-1 to 8800 m·s ^-1 . The resultant energetic materials were fully characterized by Fourier transform infrared (FTIR) spectroscopy, NMR, and X-ray diffraction (XRD). Distinctive properties were observed in crystal structure analysis and differential scanning calorimetry (DSC) tests. Moreover, the energy levels and sensitivity of these compounds were comprehensively evaluated. These novel materials exhibit excellent performance, suggesting potential applications in propellants and composite explosives.