A heat-resistant and insensitive energetic material based on the pyrazolo-triazine framework
Yuteng Cao, Ziwu Cai, Jun-hao Shi, Qinghua Zhang, Yu Liu, Wenquan Zhang
Abstract
One of the major challenges in the field of energetic materials is to develop explosive molecules with high detonation performances and low mechanical sensitivity. In this work, a heat-resistant and insensitive energetic compound 4-amino-7-nitro-5H-pyrazolo [4,3-d][1,2,3]triazine-2-oxide (3) was designed and prepared. It was identified and characterized using X-ray single-crystal diffraction, IR spectroscopy, NMR spectroscopy, mass spectrometry, thermogravimetry, differential scanning calorimetry (TG-DSC), and elemental analysis. This novel energetic compound exhibits good detonation performances (Dv = 8731 m s−1, P = 31.20 GPa), low mechanical sensitivities (IS > 20 J, FS > 360 N), and excellent thermal stability (Td = 291 °C), suggesting that compound 3 may serve as a potential high-energy and insensitive material.