Benzimidazole-based low-sensitivity and heat-resistant energetic materials: design and synthesis†

IF 2.7 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Ying Liang, Xian-Kun Hu, Zhang-Lei Yang, Miao-Miao Liu, Yao Zhang, Jin-Ting Wu, Jian-Guo Zhang, Ting-Xing Zhao, Shan-Hu Sun and Shu-Min Wang
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引用次数: 0

Abstract

Heat-resistant and low-sensitivity energetic materials are urgently needed in demanding environments, such as deep oil wells, space blasting, and hypersonic weapons. Herein, through the processes of substitution, reduction, cyclization, nitration, and ammoniation, two nitro groups and two amino groups were successfully introduced into a benzimidazole framework to prepare a new heat-resistant energetic material, 4,6-diamino-5,7-dinitro-1H-benzo[d]imidazole (DADNBI). Single crystal X-ray diffraction was executed to verify the structure of the compound. Crystal DADNBI belongs to the C2/c space group and monoclinic crystal system. The thermal stability of DADNBI was analyzed through differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), and results showed that the decomposition temperature of DADNBI was 366 °C, which is higher than that of 2,4,6-trinitrotoluene (TNT) (Td: 295 °C), hexanitrostilbene (HNS) (Td: 318 °C), and 5,5′-bis(2,4,6-trinitrophenyl)-2,2′-bi(1,3,4-oxadiazole) (TKX-55) (Td: 335 °C) and comparable to that of 1,3,5-tritamino-2,4,6-trinitrobenzene (TATB) (Td: 360 °C). Non-isothermal thermal decomposition kinetics and Mayer bond pole calculations verified the excellent thermal stability of DADNBI from a theoretical perspective. The characteristic drop height (h50%) of DADNBI is 305 cm. All these parameters of DADNBI far exceed those of the reported 5,7-dinitro-1H-benzo[d]imidazole (DNBI). This work offers important guidelines from both theoretical and experimental perspectives for designing and synthesizing new insensitive heat-resistant energetic materials.

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基于苯并咪唑的低敏耐热高能材料:设计与合成†.
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来源期刊
New Journal of Chemistry
New Journal of Chemistry 化学-化学综合
CiteScore
5.30
自引率
6.10%
发文量
1832
审稿时长
2 months
期刊介绍: A journal for new directions in chemistry
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