Thermal behavior studies of the homopolynuclear coordination compound iron(III) polyoxalate

The thermal decomposition in dynamic oxidative atmosphere of the new homopolynuclear coordination compound [Fe(C 2 O 4 )(OH)(OH 2 )] n ·0.3 n H 2 O was investigated by simultaneously using TG, DTG and DTA techniques. Solid-state decomposition products formed during heating at different temperatures (350 °C, 800 °C and 1000 °C) were analyzed by physical-chemical methods, including electronic spectroscopy (diffuse reflectance technique), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD analysis data show that the final decomposition product, namely hematite (α-Fe 2 O 3 ), is relatively well crystallized, while SEM images reveal that the particles exhibit irregular forms, their size being widely distributed between 6 nm and 4 μm.