Study on Primary Explosive: Cu(ClO₄)₂-Based Energetic Coordination Compounds as a Template

Abstract

In order to study the design and preparation of new coordination primary explosive, the influence of ligand on the performance was explored. Using the low-energy, low-nitrogen pyrrole as the skeleton and the hydrazide group as the target, the ligand 1H-pyrrole-2-carbohydrazide (PRCA) was designed, the two ECCs [Cu­(PRCA)2(H2O)­(ClO4)]­ClO4·C2H5OH (ECCs-1·C 2 H 5 OH) and [Cu­(PRCA)2(H2O)­(ClO4)]­ClO4·2H2O (ECCs-1·2H 2 O) were prepared, and [Cu­(PRCA)2(H2O)­(ClO4)]­ClO4 (ECCs-1) was obtained by a simple drying method. The structure of the target compound was confirmed by single-crystal X-ray diffraction, infrared (IR), and elemental analysis (EA) characterization. Physicochemical performance tests show that ECCs-1 has better thermal stability (T d = 219 °C) and is more sensitive to impact sensitivity (IS = 7 J) and friction sensitivity (FS = 16 N). The detonation performance prediction results show that the detonation velocity and pressure of ECCs-1 are not high (D EXPLO 5 = 6.2 km s–1, P EXPLO 5 = 16.2 GPa). However, detonation performance tests show that ECCs-1 has an extremely strong detonation ability.

Synthesis and protection: a controllable electrochemical approach to polypyrrole-coated copper azide with superior safety for MEMS

“…They serve as military and civilian initiators for secondary explosives. 1–5 Primary explosives are integrated into microelectromechanical systems (MEMS) to miniaturize igniter systems. However, traditional lead-based primary explosives, such as lead azide (LA) and lead styphnate (LS), are incompatible with MEMS explosive systems.…”