Soft x-ray magnetic circular dichroism: a probe for studying paramagnetic bioinorganic systems.
Soft x-ray magnetic circular dichroism was used to study a paramagnetic bioinogranic system. We measured the Fe L edges of Pyrococcus furiosus rubredoxin, using circularly polarized synchrotron radiation, a split-coil super-conducting 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.
van Elp
J
J
Energy and Environment Division, Lawrence Berkeley Laboratory, CA 94720.
George
S J
SJ
Chen
J
J
Peng
G
G
Chen
C T
CT
Tjeng
L H
LH
Meigs
G
G
Lin
H J
HJ
Zhou
Z H
ZH
Adams
M W
MW
D001419:Bacteria / Q000737:chemistry; D001426:Bacterial Proteins / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002942:Circular Dichroism; D008280:Magnetics; D010084:Oxidation-Reduction; D012416:Rubredoxins / Q000737:chemistry*; D014965:X-Rays
D001426:Bacterial Proteins; D012416:Rubredoxins