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- W1977436968 abstract "The crucial step in the conversion of solar to chemical energy in photosynthesis takes place in the reaction centre, 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 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 that 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. Two-dimensional electronic spectroscopic data and theoretical simulations provide the most convincing evidence so far that organisms exploit quantum coherence for efficient energy conversion during photosynthesis." @default.
- W1977436968 created "2016-06-24" @default.
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- W1977436968 date "2014-07-13" @default.
- W1977436968 modified "2023-10-18" @default.
- W1977436968 title "Quantum coherence in photosynthesis for efficient solar-energy conversion" @default.
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- W1977436968 doi "https://doi.org/10.1038/nphys3017" @default.
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