Application of magnetic-perturbation Mössbauer spectroscopy to bi-nuclear complexes with inequivalent iron atoms

Abstract

⁵⁷ Fe Mössbauer spectra of diamagnetic binuclear iron complexes in applied magnetic fields have been computed for a number of cases of interest. Analysis of the spectra shows that one can deduce the signs of the quadrupole coupling constants at both iron sites, regardless of the complexity of the zero-field spectrum, and in many cases the asymmetry parameters can be evaluated as well. The magnetically perturbed spectra also provide completely unambiguous assignments of the Mössbauer parameters for the two iron atoms.