Ion-Exchange Strategy toward Green Energetic Dinitramide Ionic Salts with Ultralow Hygroscopicity and Low Sensitivity.

Authors

Ruyi Lu, Ming Lu, Pengcheng Wang

Published in

Inorganic chemistry. Volume 65. Issue 41. Pages 24476-24482. Oct 19, 2026.

Abstract

Developing chlorine-free oxidizers that simultaneously combine high energy, low mechanical sensitivity, and moisture resistance remains a major challenge for dinitramide-based energetic materials. Herein, two nitrogen-rich heterocyclic dinitramide salts, 3 and 6, were prepared through aqueous metathesis to investigate the influence of cation structure on their physicochemical and energetic properties. Compound 3 shows a decomposition onset temperature of 170 °C and a stepwise exothermic decomposition process, indicating relatively high thermal robustness. In contrast, compound 6 combines a measured density of 1.83 g cm-3 with a calculated detonation velocity of 8951 m s-1 and a detonation pressure of 35.9 GPa, comparable to those of RDX. No initiation was observed for either salt up to the maximum tested impact energy and friction load of 40 J and 360 N, respectively. Compound 6 also exhibits minimal moisture uptake after exposure to 55% relative humidity at 25 °C for 54 h. EXPLO5 calculations predict maximum specific impulses of 268.6 and 270.0 s for GAP- and NEPE-based formulations containing 45 and 65 wt % compound 6, respectively. These results demonstrate that nitrogen-rich heterocyclic cations provide an effective strategy for balancing the energetic performance, mechanical safety, and moisture resistance of dinitramide-based materials.

PMID:
42895378
Bibliographic data and abstract were imported from PubMed on 19 Oct 2026.

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