Monitoring Long-Range Electron Transfer Pathways in Proteins by Stimulated Attosecond Broadband X-ray Raman Spectroscopy
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- 作者：Yu Zhang ; Jason D. Biggs ; Niranjan Govind ; Shaul Mukamel
- 刊名：The Journal of Physical Chemistry Letters
- 出版年：2014
- 出版时间：November 6, 2014
- 年：2014
- 卷：5
- 期：21
- 页码：3656-3661
- 全文大小：386K
- ISSN：1948-7185
文摘
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.