Moessbauer Study of Oxygenated Iron-Phthalocyanines, a Precursor of Magnetic Storage Material

摘要

~(57)Fe transmission Moessbauer spectroscopy and X-ray diffractometry were used to study α- and β-polymorphs of iron phthalocyanines (FePc) to get information about their oxygenation in connection with controlled pyrolysis of flat layered phthalocyanines initiated by radicals at relatively low temperatures, to form acicular carbide particles encaged in carbon. Moessbauer spectroscopy and XRD revealed that the oxygenation of both α- and β-polymorphs of FePc was successfully achieved. New Moessbauer spectral components (doublets) appeared upon the oxygenation in both αand β FePc. This can be attributed to iron microenvironments containing oxygen between the layers of iron phthalocyanines.