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

Par Conseil national de recherches du Canada

DOI	Trouver le DOI : https://doi.org/10.1016/j.cplett.2009.09.053
Auteur	Rechercher : Fujiwara, Takashire; Rechercher : Lee, Jae-Kwang; Rechercher : Zgierski, Marek Z.¹; Rechercher : Lim, Edward C.
Affiliation	Conseil national de recherches du Canada. Institut Steacie des sciences moléculaires du CNRC
Format	Texte, Article
Sujet	intramocelucar; dimethylaminoacetophenone; dimethylaminobenzaldehyde; photoinduced; benzaldehyde; acetophenone
Résumé	TDDFT 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.
Date de publication	2009-10-01
Dans	Chemical Physics Letters 481, nº 1-3 (1 octobre 2009) : 78–82.
Langue	anglais
Publications évaluées par des pairs	Oui
Numéro NPARC	16751243
Exporter la notice	Exporter en format RIS
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Identificateur de l’enregistrement	e4d1e363-b972-4b1d-9275-a794ae84cc50
Enregistrement créé	2011-02-09
Enregistrement modifié	2020-04-16

Date de modification :: 2024-07-01