Jump to main content
Jump to site search


Synthesis and characterization of three pyrazolate inner diazonium salts: green, powerful and stable primary explosives

Abstract

The synthesis and energetic performances of three inner diazonium salts, 3,5-dichloro-4-diazopyrazole zwitterion (1), 4-diazo-3,5-dinitropyrazole zwitterion (2), and 4-diazo-5-nitro-pyrazol-3-one zwitterion (3), were investigated in this study. All these compounds were characterized by IR, UV/Vis, 13C, and 15N NMR spectroscopy, and elemental analysis. Their structures were further confirmed by single crystal X-ray diffraction. Moreover, their themal stabilities are determined by differential scanning calorimetry (DSC). In addition, detonation parameters (e.g. detonation velocity and pressure) of the target compounds were computed using EXPLO 6.01 based on the calculated heat of formation and density. The results show that compound 2 exhibits a density of 1.849 g·cm−3 and a decomposition temperature (Td) of 154 °C, which are superior to that of the efficient primary explosive DDNP (2-diazo-4,6-dinitrophenol, Td= 142 oC). Compounds 1 and 3 also have moderately high decomposition temperatures of 135 and 151 °C, respectively. Besides, compounds 2 and 3 exhibit good detonation properties (2, 9038 m s-1, 35.0 GPa; 3, 8055 m s-1, 26.4 GPa), which are higher than those of the widely used primary explosives DDNP (7290 m s-1, 23.7 GPa) and Pb(N3)2 (5876 m s-1, 33.4 GPa). The moderately high thermal stabilities combined with the good detonation properties make them potential green primary explosives.

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Mar 2017, accepted on 12 Jul 2017 and first published on 12 Jul 2017


Article type: Paper
DOI: 10.1039/C7NJ00876G
Citation: New J. Chem., 2017, Accepted Manuscript
  •   Request permissions

    Synthesis and characterization of three pyrazolate inner diazonium salts: green, powerful and stable primary explosives

    Y. Du, J. Zhang, P. peng, H. Su, S. Li and S. Pang, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ00876G

Search articles by author

Spotlight

Advertisements