5‐Ferrocenyl‐1H‐tetrazole‐Derived Transition‐Metal Complexes: Synthesis, Crystal Structures and Catalytic Effects on the Thermal Decomposition of the Main Components of Solid Propellants. Issue 6 (26th January 2015)

• Record Type: Journal Article
• Authors: Wang, Chunyan; Li, Jizhen; Fan, Xuezhong; Zhao, Fengqi; Zhang, Weiqiang; Zhang, Guofang; Gao, Ziwei
• Is Part Of: European journal of inorganic chemistry. Issue 6(2015)
• Page Start: 1012
• Page End: 1021
• Publication Date: 2015-01-26
• Subjects: Heterogeneous catalysis -- Sandwich complexes -- High‐temperature chemistry -- Thermodynamics -- Energetic materials; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201402894
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: With the aim of developing low‐migratory burning‐rate (BR) catalysts for solid propellants, a series of transition‐metal complexes of 5‐ferrocenyl‐1 H ‐tetrazole (HFcTz), [Cu2 (bpy)2 (FcTz)4 ]· 2C2 H5 OH (1 ), [Pb(phen)2 (H2 O)3 ](FcTz)2 · H2 O (3 ), [Cu(phen)3 ](FcTz)2 · 8H2 O (4 ), [Mn(phen)2 (H2 O)2 ](FcTz)2 (5 ), [Mn(bpy)(H2 O)4 ](FcTz)2 (6 ), [Ni(phen)3 ](FcTz)2 · 9H2 O (7 ), and [Co(phen)3 ](FcTz)2 · 9H2 O (8 ) (bpy = 2, 2′‐bipyridine; phen = 1, 10‐phenanthroline), were synthesized and structurally characterized. Only a limited number of single crystals of [Pb2 (phen)4 (CO3 )](FcTz)2 · phen· 9H2 O (2 ) were formed so only its crystal structure was analyzed. The complexes show high thermal stability. Cyclic voltammetry investigations suggested that1 and3 –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. Abstract : Eight 5‐ferrocenyl‐1 H ‐tetrazole‐derived transition‐metal complexes have been synthesized and characterized by single‐crystal X‐ray diffraction. The new compounds exhibit high thermal stability and large catalytic effects on the thermal degradation of ammonium perchlorate and 1, 3, 5‐trinitro‐1, 3, 5‐triazacyclohexane.