Constructing layered structure amidine-based pentazolate salts with low sensitivity

• Published in: CrystEngComm Vol. 26; no. 3; pp. 4114 - 412
• Main Authors: Wang, Pengfei, Liu, Lile, Sun, Zebang, Qin, Feng, Shi, Lei, Gao, Chao, Du, Yang, Zhang, Chong, Hu, Bingcheng, Sun, Chengguo
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 30.07.2024
• Subjects: Crystal structure; Detonation; Energetic materials; Sensitivity analysis; Single crystals
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/d4ce00521j

Cyclo-pentazolate salt is a typical representative of nitrogen-rich energetic materials, and its structure and safety have been the subject of intensive studies. Herein, a series of amidine-based pentazolate salts were synthesized and their structures were confirmed using X-ray single crystal diffraction analysis. The crystal stacking and SEM image substantiated a layered structure. Mechanical sensitivity tests show that all the prepared salts are almost very insensitive (IS > 40 J, FS > 360 N). Moreover, the acceptable detonation performances and thermal stabilities of salts were evaluated both theoretically and experimentally. The results are of great significance in balancing high-energy structure and safety for pentazole-based materials. A series of layered structure, low sensitivity cyclo-N 5 − salts based on amidine were synthesized.