X-ray spectroscopy
- Univ. of California, Berkeley, CA (United States)
EXAFS has been a valuable tool for bioinorganic structure analysis for two decades. Dramatic improvements in x-ray optics, detectors, and sources now permit many other types of x-ray experiments. Transition metal L-edge spectroscopy in the 500-1000 eV region reveals rich information about electronic structure. X-Ray magnetic circular dichroism (XMCD) offers powerful sum rules that can be used to determine spin and orbital angular momentum. XMCD also permits selectivity for the paramagnetic components of a metalloprotein. High resolution x-ray fluorescence spectroscopy is sensitive to oxidation state and spin state, and it complements the information revealed in absorption spectra. It also allows spin-polarized EXAFS (SPEXAFS) on dilute samples. This talk will illustrate the application of these techniques to bioinorganic samples. Specific systems include blue Cu and Fe-S proteins, Ni hydrogenases and CO dehydrogenases, nitrogenase, and the Mn in photosystem II.
- OSTI ID:
- 560161
- Report Number(s):
- CONF-970443-; TRN: 97:005895-0172
- Resource Relation:
- Conference: 213. national meeting of the American Chemical Society, San Francisco, CA (United States), 13-17 Apr 1997; Other Information: PBD: 1997; Related Information: Is Part Of 213th ACS national meeting; PB: 2904 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetism of Co doped ZnO with Al codoping: Carrier-induced mechanisms versus extrinsic origins
Exploring magnetic anisotropy and robustness of the Jeff = 1/2 state under substantial orthorhombic distortion in Sr2IrO4 thin films