L-edge X-ray absorption spectroscopy of pyrococcus furiosus rubredoxin
- Univ. of California, Davis, CA (United States)
- Lawrence Berkeley Lab., CA (United States); and others
In this communication the authors present new experiments and theoretical simulations, using iron L-edge X-ray absorption spectroscopy, to study the metalloprotein Pyrococcus furiosus rubredoxin. the 3d transition metal L-edges are found between 400 and 1100 eV, in the soft X-ray region. Synchrotron radiation beam lines producing the high photon flux and high-energy resolution necessary to observe and resolve 3d transition metal L-edge spectra have only become available in the last few years. L-edge spectra are interesting not only because of the 3-4-fold-higher energy resolution (vs K-edges) but also for the sensitivity to spin state, oxidation state, and ligand field offered by p{r_arrow}d transitions. In addition, the X-ray magnetic circular dichroism (XMCD) of transition metal L-edges is predicted to be strong, and experiments have confirmed these predictions. 21 refs., 1 fig.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 232218
- Journal Information:
- Journal of the American Chemical Society, Vol. 114, Issue 11; Other Information: PBD: 20 May 1992
- Country of Publication:
- United States
- Language:
- English
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