Scientists have been able to follow the flow of excitation energy in both time and space in a molecular complex using a new technique called two-dimensional electronic spectroscopy. While holding great promise for a broad range of applications, this technique has already been used to make a surprise finding about the process of photosynthesis. The technique was developed by a team of researchers with the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California at Berkeley.
“I think this will prove to be a revolutionary method for studying energy flow in complex systems where multiple molecules interact strongly,” said Graham Fleming, Deputy Director of Berkeley Lab, and an internationally acclaimed leader in spectroscopic studies of the photosynthetic process. “Using two-dimensional electronic spectroscopy, we can map the flow of excitation energy through space with nanometer spatial resolution and femtosecond temporal resolution.”
Fleming, also a professor of chemistry with UC Berkeley, is the principal investigator of this research, and co-author of a paper which appears in the March 31, 2005 issue of the journal Nature, entitled “Two-Dimensional Spectroscopy of Electronic Couplings in Photosynthesis.” Co-authoring the paper with Fleming were Tobias Brixner, Jens Stenger, Harsha Vaswani, Minhaeng Cho and Robert Blankenship.
Lynn Yarris | EurekAlert!
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