Issue 35, 2023

Combining the advantages of 1,3,4-oxadiazole and tetrazole enables achieving high-energy insensitive materials

Abstract

Combining the advantages of energetic heterocycles to achieve high-energy insensitive explosives is a significant challenge. Herein, based on high-energy tetrazole rings and highly stable 1,3,4-oxadiazole rings, a series of novel nitrogen rich energetic compounds 5–9 were successfully constructed. The related compounds were fully characterized by EA, FT-IR, NMR, DSC, and MS, and compounds 6–9 were further confirmed by X-ray single crystal diffraction. Among them, the energetic ion salts 6–8 show high thermal stability (Tdec > 250 °C) and low mechanical sensitivity (IS > 40 J, FS > 360 N), as well as good energy properties (7552–8050 m s−1, 19.4–23.3 GPa). In particular, the azo compound 9 exhibits competent comprehensive performances (Tdec = 226.2 °C, D = 8502 m s−1, P = 28.9 GPa, IS = 32 J, FS = 320 N). These results suggest that the strategy of integrating tetrazole and 1,3,4-oxadiazole and employing an azo structure as a bridging unit are effective approaches to construct high-energy insensitive materials.

Graphical abstract: Combining the advantages of 1,3,4-oxadiazole and tetrazole enables achieving high-energy insensitive materials

Supplementary files

Article information

Article type
Paper
Submitted
03 Jul 2023
Accepted
08 Aug 2023
First published
09 Aug 2023

Dalton Trans., 2023,52, 12404-12409

Combining the advantages of 1,3,4-oxadiazole and tetrazole enables achieving high-energy insensitive materials

C. Zhang, M. Xu, W. Dong, Z. Lu, H. Zhang, X. Wu, Z. Li and J. Zhang, Dalton Trans., 2023, 52, 12404 DOI: 10.1039/D3DT02079G

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