Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 6, Pages 1012-1021Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201402894
Keywords
Heterogeneous catalysis; Sandwich complexes; High-temperature chemistry; Thermodynamics; Energetic materials
Categories
Funding
- Foundation of National Key Laboratory of Science and Technology on Combustion [9140C350308140C35160]
- National Natural Science Foundation of China (NSFC) [21171112, 21401124, 21371112, 21271124]
- 111 Project [B14041]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_14R33]
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With the aim of developing low-migratory burning-rate (BR) catalysts for solid propellants, a series of transition-metal complexes of 5-ferrocenyl-1H-tetrazole (HFcTz), [Cu-2(bpy)(2)(FcTz)(4)]2C(2)H(5)OH (1), [Pb(phen)(2)(H2O)(3)](FcTz)(2)H2O (3), [Cu(phen)(3)](FcTz)(2)8H(2)O (4), [Mn(phen)(2)(H2O)(2)](FcTz)(2) (5), [Mn(bpy)(H2O)(4)](FcTz)(2) (6), [Ni(phen)(3)](FcTz)(2)9H(2)O (7), and [Co(phen)(3)](FcTz)(2)9H(2)O (8) (bpy = 2,2-bipyridine; phen = 1,10-phenanthroline), were synthesized and structurally characterized. Only a limited number of single crystals of [Pb-2(phen)(4)(CO3)](FcTz)(2)phen9H(2)O (2) were formed so only its crystal structure was analyzed. The complexes show high thermal stability. Cyclic voltammetry investigations suggested that 1 and 3-7 exhibit quasireversible redox systems. Their catalytic effects on the thermal degradation of ammonium perchlorate (AP), 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX), and 1,2,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX) were evaluated by differential scanning calorimetry (DSC) and thermogravimetric (TG) methods. The optimum content of the new compounds in AP, RDX, and HMX was established to be 5, 5, and 2 wt.-%, respectively. They exhibit high catalytic activities in the thermal decomposition of AP and RDX. Among them, 6 was found to be the best ferrocene-based BR catalyst.
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