Energetic Metal Salts of 3-(5-Amino-1,2,4-oxadiazol-3-yl)-1H-1,2,4-triazol-5-nitramide: Promising Alternatives for Environmentally Friendly Pyrotechnic Components

Wenli Cao, Yong Hu, Ting Wei Wang, Wen Shuai Dong, Jian Guo Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

To examine the potential applications of nitrogen-rich heterocycle-based materials, a multifunctional 3-(5-amino-1,2,4-oxadiazol-3-yl)-1H-1,2,4-triazol-5-nitramide ligand with a coplanar configuration was provided, and then a series of its corresponding energetic metal salts were prepared and efficiently characterized. Potassium, cesium, and magnesium salts were further confirmed by using X-ray diffraction techniques. The crystal structures including the coordination modes and packing interactions of these three salts were analyzed. All newly prepared metal salts except EMS-6 exhibited good thermostability (Td > 236 °C) and remarkable insensitivity to mechanical stimulation (sensitivity to impact > 22.5 J, friction > 280 N), suggesting satisfactory safety performance. The constant-volume combustion energy of these eight salts was determined experimentally, and standard molar formation enthalpy (ΔfHmθ) at 298 K was calculated using Hess’s law. Upon their combustion, the three new formulations designed with EMS-1, EMS-7, and EMS-8 presented different shades of red colors, enabling them to be promising candidates for environment-friendly pyrotechnic components.

Original languageEnglish
Pages (from-to)5621-5630
Number of pages10
JournalCrystal Growth and Design
Volume23
Issue number8
DOIs
Publication statusPublished - 2 Aug 2023

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