Work

Constructing high-performance and stable energetic salts through enhanced conjugation and increased hydrogen bonds

Year: 2024

Type: article

Abstract: The pursuit of novel energetic materials with enhanced energy and safety represents an enduring challenge. Towards this goal, we employed the energetic salts to design and synthesize a metal salt ( 1 ) as well as three nitrogen-rich energetic salts ( 2 , 3 , 4 ) derived from 1,2-bis(4,5-di(1H-tetrazol-5-yl)-2H-1,2,3-triazol-2-yl) diazene ( NL24 ). The title compounds were fully characterized using Infrared Spectroscopy (IR), Nuclear Magnetic Resonance Spectroscopy (NMR), and elemental analysis. The structures of the salts 1 , 2 and 4 were further confirmed by single crystal X-ray analysis. The results showed that the physiochemical properties of 1 were improved, including thermal stability ( T d = 281 °C), and explosive performance ( V D = 9200 m s −1 ). Besides, the physicochemical stability of hydrazine salt ( 4 ) reached the optimum level, including thermal stability ( T d = 294 °C) and mechanical sensitivity (IS = 25 J, FS = 220 N). In addition, the structure-property relationship was elucidated through investigation of the crystal structure and the noncovalent interactions of 1 , 2 and 4 . This study has augmented the detonation efficacy and stability of NL24 through the synthesis of high-energy salts, thereby expanding the application domain of NL24 from a primary to a secondary explosive. • A metal salt ( 1 ) as well as three nitrogen-rich energetic salts ( 2 , 3 , 4 ) derived from NL24 . • Potassium salt 1 has the highest enthalpy of formation (5.20 kJ g −1 ) and detonation performance (9200 m s −1 , 35.33 GPa). • Hydrazine salt 4 has the highest decomposition temperature (294 °C), and the lowest mechanical sensitivity (25 J, 220 N).

Source: Energetic Materials Frontiers

DOI: 10.1016/j.enmf.2024.11.002

Authors: Li-nan Zhang, Guang Wu, Ze Xu, Shuai-jie Jiang, Ming Lu, Qiu-han Lin

Institution: Nanjing University of Science and Technology

Language: English

Topic: Energetic Materials and Combustion

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

Funder: National Natural Science Foundation of China