Soft x-ray magnetic circular dichroism: a probe for studying paramagnetic 
bioinorganic systems

van Elp, J.; George, S. J.; Chen, J.; Peng, G.; Chen, C. T.; Tjeng, L. H.; Meigs, G.; Lin, H.-J.; Zhou, Z. H.; Adams, M. W. W.; Searle, B. G.; Cramer, S. P.

doi:10.1073/pnas.90.20.9664

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Soft x-ray magnetic circular dichroism: a probe for studying paramagnetic bioinorganic systems

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van Elp, J., George, S. J., Chen, J., Peng, G., Chen, C. T., Tjeng, L. H., et al. (1993). Soft x-ray magnetic circular dichroism: a probe for studying paramagnetic bioinorganic systems. Proceedings of the National Academy of Sciences of the United States of America, 90(20), 9664-9667. doi:10.1073/pnas.90.20.9664.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-1F5A-7

Abstract

Soft x-ray magnetic circular dichroism was used to study a paramagnetic bioinorganic system. We measured the Fe L edges of Pyrococcus furiosus rubredoxin, using circularly polarized synchrotron radiation, a split-coil superconducting magnet, low sample temperatures, and fluorescence detection. The observed dichroism effect is strong (30%) and in general agreement with the calculation. The method is element- and oxidation state-specific, and the data can be interpreted by established theoretical procedures. Soft x-ray magnetic circular dichroism demonstrates enormous potential as a probe for studying paramagnetic systems in biology, chemistry, and material science.