Two-Step Access to High-Energy Materials via Intrinsic Fuel-Oxidizer Design.

The development of advanced energetic materials that balance high performance with synthetic accessibility remains a formidable challenge in aerospace and defense applications. Here, we report a simple two-step synthetic strategy to access two distinct yet complementary energetic platforms, a solvent-free sodium-based energetic framework (3) and a hydrazinium-based hypergolic salt (4), from a common precursor. This design leverages an intrinsic fuel-oxidizer motif, integrating gem-dinitro oxidizing units with hydrazine-based fuel fragments to achieve internal redox balance and enhanced energetic output. Compound 3 exhibits a high density of 1.83 g cm-3 and good thermal stability (182 °C), while compound 4 delivers good detonation performance (VOD = 8831 m s-1, DP = 31.8 GPa) together with remarkable hypergolic activity toward white fuming nitric acid, achieving an ignition delay of only 18 ms. Hirshfeld surface analysis further reveals that the solid-state architecture of 4 is stabilized by an extensive hydrogen-bonding network, with O-H interactions contributing 70% of the surface contacts, highlighting the role of directed intermolecular packing in its energetic behavior. This work establishes a cost-effective design paradigm that reconciles synthetic simplicity with high-performance energetic metrics, providing a versatile platform for next-generation ignition-responsive energetic materials.