Novel energetic coordination compounds based on 3,5-dinitro-4-oxylpyrazolate ligand with excellent thermostability and low sensitivity

Abstract

In recent years, the discovery of novel energetic coordination compounds (ECCs) with high energy performance and low sensitivity is very desirable but highly challenging. Nitroazole-based ECCs have attracted a lot of attention in this area owing to their prominent advantages including excellent energy performance and good thermostability. Herein, three new ECCs based on 3,5-dinitro-4-oxylpyrazolate (DNOP) ligand were synthesized, characterized and evaluated as potential high-energy materials. Their structures and coordination mode were confirmed by the single crystal X-ray diffraction analysis. Thermal stability, sensitivities and energy performance were measured and studied in detail. The results suggest that as-prepared new ECCs are classified as “less sensitive” energetic materials exhibiting relative low sensitivity (IS = 14–18 J, FS = 240–324 N). Additionally, these new ECCs exhibit excellent thermal stability with high decomposition temperature beyond 290 °C. Inheriting the significant energy performance of 3,5-dinitro-4-oxylpyrazolate ligand, they could also possess attractive energy property.