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- W2893341866 abstract "Photocatalysis enables the synthesis of valuable organic compounds by exploiting photons as a chemical reagent. Although light absorption is an intrinsic step, existing approaches rely on poorly absorbing catalysts that require high illumination intensities to afford enhanced efficiencies. Here, we demonstrate that a plasmonic metamaterial capable of near-perfect light absorption (94%) readily catalyzes a model organic reaction with a 29-fold enhancement in conversion relative to controls. The oxidation of benzylamine proceeds via a reactive iminium intermediate with high selectivity at ambient temperature and pressure, using only low-intensity visible irradiation. Control experiments demonstrated that only hot charge carriers produced following photoexcitation facilitate the formation of superoxide radicals, which, in turn, leads to iminium formation. Modeling shows that hot holes with energies that overlap with the highest-occupied molecular orbital (HOMO) of the reactant can participate and initiate the photocatalytic conversion. These results have important implications for hot-carrier photocatalysis and plasmon-hot-carrier extraction." @default.
- W2893341866 created "2018-10-05" @default.
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- W2893341866 date "2018-09-26" @default.
- W2893341866 modified "2023-10-14" @default.
- W2893341866 title "Hot-Carrier Organic Synthesis via the Near-Perfect Absorption of Light" @default.
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- W2893341866 doi "https://doi.org/10.1021/acscatal.8b03486" @default.
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