Presently, the central requirement of novel high-energy material research involves the harmonization of detonation performance and mechanical sensitivity. In this work, two advanced high-energy insensitive tricyclic energetic materials 3-nitro-6-(3-nitro-1 H -1,2,4-triazol-5-yl)-7 H -1,2,4triazolo4,3- b 1,2,4triazole ( 4 ) and 6-(3,4-dinitro-1 H -pyrazol-5-yl)-3-nitro-7 H -1,2,4triazolo4,3- b 1,2,4triazole ( 12 ) were obtained via the Sandmeyer reaction. Further combination with energetic bases forms energetic salts 5 – 7 and 13 – 15 with good detonation performance and insensitivity. Notably, the neutral tricyclic energetic compounds 4 ( P = 32.3 GPa, V D = 8802 m·s –1 ) and 12 ( P = 31.6 GPa, V D = 8627 m·s –1 ) demonstrate detonation performance similar to that of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX: P = 34.9 GPa, V D = 8795 m·s –1 ) and excellent mechanical sensitivities ( 4: IS > 40 J, FS = 288 N; 12: IS > 40 J, FS > 360 N) among fully C-nitrated cyclic azoles. This work establishes a scalable platform for synthesizing full C-nitro functionalization, providing new avenues to modulate detonation performance and favorable mechanical sensitivity for advanced high-energy-density materials applications.
Su et al. (Fri,) studied this question.