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- W4283701747 abstract "Excited state intramolecular proton transfer (ESIPT) has been documented from an amino NH2 group to a carbon atom of an adjacent aromatic ring. This finding changes the paradigm, as hitherto such processes have not been considered as plausible due to slow protonation of carbon and low (photo)acidity of the NH2 group. The ESIPT was studied by irradiation of 2-(2-aminophenyl)naphthalene in CH3CN–D2O, whereupon regiospecific incorporation of deuterium takes place at the naphthalene position 1, with a quantum yield of Φ = 0.11. A synergy of experimental and computational investigations completely unraveled the mechanism of this important photochemical reaction. Upon excitation to the photoreactive S2(La) state, a favorable redistribution of charge sets the stage for ESIPT to the carbon atom in naphthalene position 1. H2O molecules are needed, as they increase the excitation energy and oscillator strength for the population of the S2(La) state. The gain in energy is used to surmount a small energy barrier on the pathway from the Franck–Condon geometry to the conical intersection with the S0, delivering aza-quinone methide." @default.
- W4283701747 created "2022-06-30" @default.
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- W4283701747 date "2022-06-28" @default.
- W4283701747 modified "2023-10-18" @default.
- W4283701747 title "Excited State Intramolecular Proton Transfer (ESIPT) from -NH<sub>2</sub> to the Carbon Atom of a Naphthyl Ring" @default.
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- W4283701747 doi "https://doi.org/10.1021/acs.joc.2c00818" @default.
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