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Quantum Coherence in Photosynthesis for Efficient Solar Energy Conversion

Romero, Elisabet ; Augulis, Ramunas ; Novoderezhkin, Vladimir I ; Ferretti, Marco ; Thieme, Jos ; Zigmantas, Donatas ; van Grondelle, Rienk

Nature physics, 2014-09, Vol.10 (9), p.676-682 [Periódico revisado por pares]

England: Nature Publishing Group

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  • Título:
    Quantum Coherence in Photosynthesis for Efficient Solar Energy Conversion
  • Autor: Romero, Elisabet ; Augulis, Ramunas ; Novoderezhkin, Vladimir I ; Ferretti, Marco ; Thieme, Jos ; Zigmantas, Donatas ; van Grondelle, Rienk
  • Assuntos: Atom and Molecular Physics and Optics ; Atom- och molekylfysik och optik ; Charge ; Chemical energy ; Coherence ; Conversion ; Electronics ; Excitons ; Fysik ; Natural Sciences ; Naturvetenskap ; Photosynthesis ; Physical Sciences ; Quantum physics ; Separation ; Solar energy
  • É parte de: Nature physics, 2014-09, Vol.10 (9), p.676-682
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Current address: TU Delft, Applied Sciences ChemE/Chemical Engineering, Delft, The Netherlands
    Author Contributions: E.R., R.A., M.F., J.T., and D.Z. collected the experimental 2DES data. R.A., and M.F. developed the data analysis programs. E.R. analyzed the experimental data. V.I.N., E.R., and R.v.G. developed the theoretical modeling. E.R. D.Z., and R.v.G. designed the research. E.R., V.I.N., D.Z., and R.v.G. wrote the paper. All authors discussed the results and commented on the manuscript.
    Current address: Center for Physical Sciences and Technology, Vilnius, Lithuania
  • Descrição: The crucial step in the conversion of solar to chemical energy in Photosynthesis takes place in the reaction center where the absorbed excitation energy is converted into a stable charge separated state by ultrafast electron transfer events. However, the fundamental mechanism responsible for the near unity quantum efficiency of this process is unknown. Here we elucidate the role of coherence in determining the efficiency of charge separation in the plant photosystem II reaction centre (PSII RC) by comprehensively combining experiment (two-dimensional electronic spectroscopy) and theory (Redfield theory). We reveal the presence of electronic coherence between excitons as well as between exciton and charge transfer states which we argue to be maintained by vibrational modes. Furthermore, we present evidence for the strong correlation between the degree of electronic coherence and efficient and ultrafast charge separation. We propose that this coherent mechanism will inspire the development of new energy technologies.
  • Editor: England: Nature Publishing Group
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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