Monitoring Long-Range Electron Transfer Pathways in Proteins by Stimulated Attosecond Broadband X-ray Raman Spectroscopy.
Long-range electron transfer (ET) is a crucial step in many energy conversion processes and biological redox reactions in living organisms. We show that newly developed X-ray pulses can directly probe the evolving oxidation states and the electronic structure around selected atoms with detail not available through conventional time-resolved infrared or optical techniques. This is demonstrated in a simulation study of the stimulated X-ray Raman (SXRS) signals in Re-modified azurin, which serves as a benchmark system for photoinduced ET in proteins. Nonlinear SXRS signals offer a direct novel window into the long-range ET mechanism.
Department of Chemistry, University of California , 450 Rowland Hall, Irvine, California 92697, United States.
Yu
Y
Zhang
Department of Chemistry, University of California , 450 Rowland Hall, Irvine, California 92697, United States.
Jason D
JD
Biggs
William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory , P.O. Box 999, Richland, Washington 99352, United States.
Niranjan
N
Govind
Department of Chemistry, University of California , 450 Rowland Hall, Irvine, California 92697, United States.
Shaul
S
Mukamel