A New Energetic Complex: Synthesis, Structure, and Combustion Catalysis Performance

Abstract

The potential of tetrazole-based ligands for forming energetic complexes applied in pyrotechnics and propellants is demonstrated with the use of 5,5'-(1,3-phenylene)bis(1H-tetrazole) (H 2 BTB) to generate an energetic complex with high energy. A new energetic complex of Pb II -tetrazolate, [Pb 2 (BTB) 2 (H 2 O) 8 ]•5H 2 O (1), was synthesized and structurally characterized by single crystal X-ray diffraction. Structural analysis reveals that the central Pb II ions present two distinct coordination environments in the asymmetric unit, including distorted pentagonal bipyramid and distorted tetragonal pyramid geometries, respectively. To identify potential combustion catalyst as additives in propellants, we employed differential scanning calorimetry technique to evaluate the influence of the complex on thermal decomposition of ammonium perchlorate (AP) and cyclotrimethylenetrinitramine (RDX). The kinetic parameters of an exothermic process for the catalytic system of RDX+1 were investigated by the Kissinger's and Ozawa-Doyle's methods. For both AP and RDX, the decomposition temperature decreased obviously in the presence of 1, and the released heat could effectively compensate the propellants. Our observations demonstrate that 1 shows good catalytic activity toward the thermal decomposition of AP and RDX.

Combination of 3-Aminofurazan-4-carboxylic Acid and Transition Metals to Prepare Functional Energetic Catalysts for Catalyzing the Decomposition of Ammonium Perchlorate

“…A catalytic combustion catalyst is a substance that effectively affects the combustion process. Doping combustion catalyst is regarded as the most practical way to resolve the abovementioned problems. − Currently, the most widely used catalysts include carbon materials, metals and alloys, metal oxides, and metal complexes. − Energetic metal complexes are a class of metal compounds with a discrete or infinite continuous spatial structure, which is formed by the metal center bridging with energetic organic ligands through coordination bonds. , Various structure and function complexes can be formed with the help of directional coordination bonds and intermolecular forces like hydrogen bonds and π–π stacking . Energetic metal complexes are characterized by possessing energetic properties and metal centers with catalytic activity .…”