Initial approach for obtaining sintered composites from heterobimetallic complexes containing Sn-Fe bond

Abstract

Three heterobimetallic complexes, [FeCp(CO)2]2SnCl2, [FeCp(CO)2]SnCl3 and [FeCp(CO)2]2Sn(PDC) in which Cp = cyclopentadienyl and PDC = pyridine-2,6-dicarboxylate, were synthesized, characterized by nuclear magnetic resonance spectroscopy (1H, 13C and 119Sn NMR), infrared spectroscopy (IR), thermogravimetric experiments (TG/DT), and elemental analysis (C, H, and N). The complexes were then used as precursors for an initial approach of obtaining sintered composites respectively designated as (1), (2) and (3). X-ray diffraction (XRD, powder method) and 119Sn and 57Fe Mössbauer results have showed the presence of SnO2, syn cassiterite and Fe2O3, syn hematite as main constitutes of the materials. Electron probe X-ray microanalysis (EPMA) and scanning electron micrographs (SEM) have indicated the formation of a compact solid for samples (1) and (2) and the PDC ligand have contributed to the presence of more well-formed and dispersed grains for (3).