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

Omar F. Mohammed, Eric Vauthey*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)246-250
Number of pages5
JournalChemical Physics Letters
Volume487
Issue number4-6
DOIs
StatePublished - Mar 5 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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