Preparation of multi-functional type coordination compounds: spanning the quantitative restriction of oxidizing groups

Based on the ideas of coordination and design chemistry, we propose a new strategy to break through the limitation of the number of oxidizing acid radicals in energetic coordination compounds by preparing multi-functional type energetic coordination compounds. Therefore, we creatively designed and prepared the ligand 5-amino-1-methyl-pyrazole-4-carbohydrazide (AMPZCA) and complex Cu(HAMPZCA)₂(ClO₄)₄·2H₂O (ECCs-1). As expected, the structure of ECCs-1 was a double-type ionic-salt coordination compound, which was proved by IR, EA, and single-crystal XRD. Because of the special structural combination, ECCs-1 has more ClO₄⁻, higher OB value, and excellent detonation performance (D = 7700 m s⁻¹, P = 27.9 GPa). In addition, ECCs-1 exhibits acceptable mechanical sensitivity due to the introduction of methyl groups in the ligand (IS = 10 J, FS = 40 N). Laser initiation and detonation initiation tests show that ECCs-1 has the potential to play a dual role as both primary and secondary explosives.