Three energetic salts based on oxy-bridged bis(gem-dinitro) furazan: Syntheses, structures and thermal behaviors

•Three high-energy salts with mixed cations were synthesized by metathesis reaction.•Different coordination environment of K+ ion were observed in different ionic salt.•The thermal decomposition behaviors were studied by the DSC, TG methods.•All the ionic salts have good thermal stability.

Three high-energy salts (3, 4 and 5) based on oxy-bridged bis(gem-dinitro) furazan with potassium and nitrogen-rich cations were reported. Their structures were fully characterized and confirmed by NMR (1H, 13C), IR spectroscopy, elemental analysis and single crystal X-ray diffraction. The thermal decomposition behaviors were studied by DSC and TG methods. And, the decomposition process of 5 was studied by the thermolysis in-situ rapid-scan FTIR. The non-isothermal kinetics parameters were obtained by Kissinger’s and Ozawa’s methods, respectively. The activation entropy (ΔS≠), activation enthalpy (ΔH≠), activation Gibbs free energy (ΔG≠) and the critical temperature of thermal explosion were calculated.

Graphical abstractThree high-energy salts were synthesized and characterized by various means, including single crystal X-ray diffraction analysis. The thermal decomposition behaviors of the compounds were studied.Figure optionsDownload full-size imageDownload as PowerPoint slide