Two Energetic Framework Materials Based on DNM–TNBI as Host Molecule: Effectively Coordinated by Different Cations

Abstract

AbstractWith the demand of develop outstanding‐performance energetic materials, 1‐(dinitromethyl)‐4,4’,5,5’‐tetranitro‐1H,1’H‐2,2’‐biimidazole (DNM–TNBI) emerged as a great contender (D: 9102 m ⋅ s−1; P: 37.6 GPa). However, the relatively poor thermal stability (Td: 142 °C) limits its practical application. In this study, DNM–TNBI as a host molecule to synthesize two new energetic open–framework materials by effectively coordinated with different cations. Their supramolecular structures were investigated and indicated that [DNM–TNBI2−][2NH4+] and [DNM–TNBI2−][2K+] can be classified as a new energetic hydrogen–bonded ammonium framework (EHAF) and an energetic metal organic framework (EMOF). Meanwhile, their thermal stabilities are higher than that of DNM–TNBI and have satisfactory detonation performance ([DNM–TNBI2−][2NH4+], D: 8050 m ⋅ s−1, P: 26.4 GPa; [DNM–TNBI2−][2K+], D: 8301 m ⋅ s−1, P: 30.8 GPa).