Tunable mechanics and energetics in structurally diverse TNPG-based metal organic networks

Developing high-energy materials that are powerful yet safe requires a careful balance between thermal stability, mechanical strength, and detonation performance. While metal coordination is a known strategy to improve the thermal stability of energetic compounds like trinitrophloroglucinol (TNPG), mono-metallic networks often suffer from diminished detonation performance and increased sensitivity. This work introduces a new class of hetero-metallic metal-organic networks, MM'-TNPG (M/M' = Li, Na, K), that harmonizes all critical performance parameters, including enhanced thermal stability, reduced sensitivity, and high detonation output. Particularly, we present the first systematic correlation between mechanical properties evaluated <i>via</i> nanoindentation and detonation performance, revealing how structural features and metal coordination govern the material's robustness and energetic behavior. Correlating mechanical properties with the detonation and safety parameters could potentially offer a predictive approach to designing safer designs of high-performance, energetic materials. The hetero-metallic systems exhibit synergistic enhancement in mechanical strength without compromising explosive efficiency. This work introduces a novel design strategy for safer, high-performance, energetic materials, establishing a vital structural-mechanical-energetic property relationship that has previously been unexplored in this field.