187Os and 193Ir Mössbauer Investigation of Coordination Complexes Using Synchrotron Radiation

Mössbauer effect (nuclear gamma resonance spectroscopy) is best known and most commonly applied to iron complexes (⁵⁷Fe is the active nucleus). But many other elements (isotopes) can be studied by this powerful technique, such as ¹⁸⁷Os and ¹⁹³Ir. In the present case, studies were performed on a variety of osmium and iridium coordination complexes, some of which are medicinally relevant as potential anti-cancer drugs. Information on the correlation of their Mössbauer parameters with complex geometry and oxidation state was obtained. Computational studies to obtain a deeper understanding of the spectroscopic results will also be described.