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Ultrafast excited-state dynamics of aminoperylene and of its protonated form observed by femtosecond absorption spectroscopy

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Mohammed, Omar F.
Published in Chemical Physics Letters. 2010, vol. 487, no. 4-6, p. 246 - 250
Abstract The photophysics of aminoperylene (APe) in various solvents, including a room-temperature ionic liquid, has been investigated by steady-state and femtosecond transient absorption spectroscopies. The ultrafast excited-state dynamics originates from the solvation of the polar S1 state and not from a transition from a locally-excited to a charge-transfer state, as found with perylene-dimethylaniline. Addition of acid yields the protonated form APeH+, which exhibits similar photophysical properties than perylene, due to the suppression of the charge-transfer character of the S0–S1 transition. However, excited-state proton transfer, resulting to the formation of APe in the S1 state, is observed in methanol.
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MOHAMMED, Omar F., VAUTHEY, Eric. Ultrafast excited-state dynamics of aminoperylene and of its protonated form observed by femtosecond absorption spectroscopy. In: Chemical Physics Letters, 2010, vol. 487, n° 4-6, p. 246 - 250. https://archive-ouverte.unige.ch/unige:6469

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Deposited on : 2010-05-04

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