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|Title:||Direct observation of multistep energy transfer in LHCII with fifth-order 3D electronic spectroscopy||Authors:||Zhang, Zhengyang
Lambrev, Petar H.
Wells, Kym Lewis
|Issue Date:||2015||Source:||Zhang, Z., Lambrev, P. H., Wells, K. L., Garab, G., & Tan, H.-S. (2015). Direct observation of multistep energy transfer in LHCII with fifth-order 3D electronic spectroscopy. Nature Communications, 6, 7914-. doi:10.1038/ncomms8914||Series/Report no.:||Nature Communications||Abstract:||During photosynthesis, sunlight is efficiently captured by light-harvesting complexes, and the excitation energy is then funneled towards the reaction centre. These photosynthetic excitation energy transfer (EET) pathways are complex and proceed in a multistep fashion. Ultrafast two-dimensional electronic spectroscopy (2DES) is an important tool to study EET processes in photosynthetic complexes. However, the multistep EET processes can only be indirectly inferred by correlating different cross peaks from a series of 2DES spectra. Here we directly observe multistep EET processes in LHCII using ultrafast fifth-order three-dimensional electronic spectroscopy (3DES). We measure cross peaks in 3DES spectra of LHCII that directly indicate energy transfer from excitons in the chlorophyll b (Chl b) manifold to the low-energy level chlorophyll a (Chl a) via mid-level Chl a energy states. This new spectroscopic technique allows scientists to move a step towards mapping the complete complex EET processes in photosynthetic systems.||URI:||https://hdl.handle.net/10356/89140
|DOI:||http://dx.doi.org/10.1038/ncomms8914||Rights:||© 2015 Macmillan Publishers Limited. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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