A powerful and relatively new way to study Fe in biological systems is Nuclear ResonanceVibrational Spectroscopy (NRVS). In this synchrotron radiation technique, a sample is excited with a ~1 meV bandwidth beam near a M�ssbauer resonance, and the delayed fluorescence is recorded as a function of excitation energy. When applied to Fe samples, NRVS is only sensitive to vibrations involving motion of 57-Fe. We will present results on model compounds, small Fe-S proteins, and nitrogenase, and hydrogenase, and the needs and prospects for future improvements will be discussed. Complementing NRVS are the M�ssbauer related techniques of Nuclear forward scattering (NFS) and synchrotron-radiation perturbed angular correlation (SRPAC).  Preliminary results with these methods on model compounds will be discussed.  The extension of all these techniques to other elements in the periodic table will be discussed.

Bioinorganic applications of Mössbauer-related spectroscopy using synchrotron radiation

239th National Meeting (2010)

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