Novel energetic salts based on nitrogen-rich fused ring cations: Synthesis, characterization and infrared laser ignition property

In this work, four energetic nitrates, i.e., 4,7-diamino-1H-[1,2,3]triazolo[4,5- d ]pyridazin-5-ium nitrate ( 1 ), 2,6diamino-1-hydroxy-9H-purine-1,7-diium nitrate ( 2 ), 6-amino-[1,2,4]triazolo[4,3- b ][1,2,4,5]tetrazin-2-ium nitrate ( 3 ) and 3,6-diamino-[1,2,4]triazolo[4,3- b ][1,2,4,5]tetrazin-2-ium nitrate ( 4 ), were prepared and comprehensively characterized. The X-ray diffraction results indicated that compounds 1-4 had different layered structures with the densities in the range of 1.616-1.805 g/cm3. The highest density value of 1.805 g/cm3 was represented in compound 2 , which was higher than that of most other nitrates. Moreover, compounds 1-4 had good thermal stabilities, the decomposition temperatures were in the ranged of 165-181 degrees C, which made them have great potential to further develop. The calculated detonation velocities and detonation pressures of these compounds were in the range of 7678-8925 m/s, and 21.96-32.39 GPa, respectively. The greatest detonation velocity and detonation pressure were observed in compound 3 . The specific impulses of these compounds were in the range of 199.8-244.9 m/s. Notably, compound 1 had near infrared laser (lambda = 1064 nm) ignition capacity, which was the first example of CHNO based energetic compound with near infrared laser ignition performance.