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Observation of electronic excitation transfer through light harvesting complex II using two-dimensional electronic–vibrational spectroscopy

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Original languageEnglish
Pages (from-to)4197-4206
Number of pages10
JournalJournal of Physical Chemistry Letters
Volume7
Issue number20
Early online date5 Oct 2016
DOIs
DateAccepted/In press - 5 Oct 2016
DateE-pub ahead of print - 5 Oct 2016
DatePublished (current) - 20 Oct 2016

Abstract

Light-harvesting complex II (LHCII) serves a central role in light harvesting for oxygenic photosynthesis and is arguably the most important photosynthetic antenna complex. In this work, we present two-dimensional electronic–vibrational (2DEV) spectra of LHCII isolated from spinach, demonstrating the possibility of using this technique to track the transfer of electronic excitation energy between specific pigments within the complex. We assign the spectral bands via comparison with the 2DEV spectra of the isolated chromophores, chlorophyll a and b, and present evidence that excitation energy between the pigments of the complex are observed in these spectra. Finally, we analyze the essential components of the 2DEV spectra using singular value decomposition, which makes it possible to reveal the relaxation pathways within this complex.

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    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via ACS Publications at http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.6b02280. Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 708 KB, PDF document

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