Direct observation of electronic relaxation dynamics in adenine via time-resolved photoelectron spectroscopy

DOI	Trouver le DOI : https://doi.org/10.1021/ja030532q
Auteur	Rechercher : Ullrich, Susanne¹; Rechercher : Schultz, Thomas; Rechercher : Zgierski, Marek Z.¹; Rechercher : Stolow, Albert¹
Affiliation	Conseil national de recherches Canada. Institut Steacie des sciences moléculaires du CNRC
Format	Texte, Article
Résumé	We present femtosecond time-resolved photoelectron spectra of adenine in a molecular beam, recorded at pump wavelengths of 250, 267, and 277 nm. This leads to initial excitation of the bright S2(). Close to the band origin (277 nm), the lifetime is several picoseconds. Higher vibronic levels (267 and 250 nm excitation) show much shorter lifetimes of t < 50 fs, and we observe strong coupling between S2() and S1(n). Rapid internal conversion (t < 50 fs) populates the lower lying S1(n) state which has a lifetime of 750 fs. At 267 nm, we found evidence for an additional channel which is consistent with the dissociative S3() state, previously proposed as an ultrafast relaxation pathway from S2().
Date de publication	2004-03-03
Dans	Journal of the American Chemical Society 126, nº 8 (3 mars 2004) : 2262–2263.
Langue	anglais
Publications évaluées par des pairs	Oui
Numéro NPARC	12329058
Exporter la notice	Exporter en format RIS
Signaler une correction	Signaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement	09e2eb5c-18e3-489b-ab6f-f664e5483797
Enregistrement créé	2009-09-10
Enregistrement modifié	2023-04-17

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