Intramolecular charge transfer in the excited state of 4-dimethylaminobenzaldehyde and 4-dimethylaminoacetophenone

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DOIResolve DOI: http://doi.org/10.1016/j.cplett.2009.09.053
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TypeArticle
Journal titleChemical Physics Letters
Volume481
Issue1-3
Pages7882; # of pages: 5
Subjectintramocelucar; dimethylaminoacetophenone; dimethylaminobenzaldehyde; photoinduced; benzaldehyde; acetophenone
AbstractTDDFT calculations and time-resolved transient absorption (TA) studies of the low-lying excited states of 4-dimethylaminobenzaldehyde (4-DMABA) and 4-dimethylaminoacetophenone (4-DMAAP) have been carried out to probe the mechanism of photoinduced intramolecular charge transfer (ICT). In polar acetonitrile, where dual fluorescence appears, both 4-DMABA and 4-DMAAP exhibit a TA band at about 510 nm and 490 nm, which correspond to the absorption spectra of the twisted ICT (TICT) state, with spectral characteristics that correspond to the radical anion absorptions of benzaldehyde or acetophenone. The decay time of the TICT-state absorption corresponds to that of the ICT fluorescence, indicating that the fluorescent ICT state is the TICT states.
Publication date
LanguageEnglish
AffiliationNRC Steacie Institute for Molecular Sciences; National Research Council Canada
Peer reviewedYes
NPARC number16751243
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Record identifiere4d1e363-b972-4b1d-9275-a794ae84cc50
Record created2011-02-09
Record modified2016-05-09
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