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• W2087141467 endingPage "3575" @default.
• W2087141467 startingPage "3567" @default.
• W2087141467 abstract "A molecular tetrad consisting of a free base porphyrin (P) linked to a triquinone moiety consisting of a naphthoquinone bearing two benzoquinones (NQ−BQ2) has been synthesized and its photochemistry has been investigated using time-resolved spectroscopic techniques. Excitation of the porphyrin chromophore of the P−NQ−BQ2 tetrad in benzonitrile solution is followed by photoinduced electron transfer with a rate constant of 8.3 × 1010 s-1 to produce an initial P•+−NQ•-−BQ2 state with a quantum yield of unity. A charge shift reaction gives a final P•+−NQ−(BQ•-BQ) charge-separated state, which decays to the ground state with a rate constant of 1.9 × 1010 s-1. The tetrad features both sequential and parallel multistep electron-transfer pathways. No evidence was found for significant involvement of direct electron transfer from the porphyrin first excited singlet state to a benzoquinone." @default.
• W2087141467 created "2016-06-24" @default.
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• W2087141467 date "2003-03-27" @default.
• W2087141467 modified "2023-09-27" @default.
• W2087141467 title "Stepwise Sequential and Parallel Photoinduced Charge Separation in a Porphyrin−Triquinone Tetrad" @default.
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• W2087141467 doi "https://doi.org/10.1021/jp022424g" @default.
• W2087141467 hasPublicationYear "2003" @default.
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