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Dark States in the Light-Harvesting complex 2 Revealed by Two-dimensional Electronic Spectroscopy

Author(s): Ferretti, Marco; van Grondelle, Rienk; Scholes, Gregory D.; Novoderezhkin, Vladimir I.; Cogdell, Richard J.; et al

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dc.contributor.authorFerretti, Marco-
dc.contributor.authorvan Grondelle, Rienk-
dc.contributor.authorScholes, Gregory D.-
dc.contributor.authorNovoderezhkin, Vladimir I.-
dc.contributor.authorCogdell, Richard J.-
dc.contributor.authorSouthall, June-
dc.contributor.authorRomero, Elisabet-
dc.contributor.authorHendrikx, Ruud-
dc.date.accessioned2020-11-12T18:51:32Z-
dc.date.available2020-11-12T18:51:32Z-
dc.date.issued2016-02-09en_US
dc.identifier.citationFerretti, Marco, Hendrikx, Ruud, Romero, Elisabet, Southall, June, Cogdell, Richard J., Novoderezhkin, Vladimir I., Scholes, Gregory D., van Grondelle, Rienk. (2016). Dark States in the Light-Harvesting complex 2 Revealed by Two-dimensional Electronic Spectroscopy. Scientific Reports, 6 (1), 10.1038/srep20834en_US
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr13n7v-
dc.descriptionScientific Reports. Volume 6, 9 February 2016, Article number 20834.en_US
dc.description.abstractEnergy transfer and trapping in the light harvesting antennae of purple photosynthetic bacteria is an ultrafast process, which occurs with a quantum efficiency close to unity. However the mechanisms behind this process have not yet been fully understood. Recently it was proposed that low-lying energy dark states, such as charge transfer states and polaron pairs, play an important role in the dynamics and directionality of energy transfer. However, it is difficult to directly detect those states because of their small transition dipole moment and overlap with the B850/B870 exciton bands. Here we present a new experimental approach, which combines the selectivity of two-dimensional electronic spectroscopy with the availability of genetically modified light harvesting complexes, to reveal the presence of those dark states in both the genetically modified and the wild-type light harvesting 2 complexes of Rhodopseudomonas palustris. We suggest that Nature has used the unavoidable charge transfer processes that occur when LH pigments are concentrated to enhance and direct the flow of energy. © 2016, Nature Publishing Group. All rights reserved.en_US
dc.format.extent6:20834-1 - 20834-9en_US
dc.language.isoenen_US
dc.relation.ispartofScientific Reportsen_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleDark States in the Light-Harvesting complex 2 Revealed by Two-dimensional Electronic Spectroscopyen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1038/srep20834-
dc.identifier.eissn2045-2322-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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