| DOI | Trouver le DOI : https://doi.org/10.1063/1.1345876 |
|---|
| Auteur | Rechercher : Lochbrunner, S.1; Rechercher : Schultz, T.1; Rechercher : Schmitt, M.1; Rechercher : Shaffer, J. P.1; Rechercher : Zgierski, M. Z.1; Rechercher : Stolow, Albert1 |
|---|
| Affiliation | - Conseil national de recherches Canada. Institut Steacie des sciences moléculaires du CNRC
|
|---|
| Format | Texte, Article |
|---|
| Sujet | ab initio calculations; chemical exchanges; excited states; isomerisation; nonradiative transitions; organic compounds; photoelectron spectra; time resolved spectra |
|---|
| Résumé | We investigate the applicability of time-resolved photoelectron spectroscopy to excited state intramolecular proton transfer (ESIPT) and internal conversion dynamics in the model system o-hydroxybenzaldehyde (OHBA) and related compounds. Photoelectron spectra of both the excited state enol and keto tautomers were obtained as a function of pump laser wavelength and pump-probe time delay. The ESIPT was found to occur in less than 50 fs over the whole absorption range of the S1(pipi*) state for both OHBA and its monodeuterated analog, suggestive of a small or nonexistent barrier. The subsequent keto internal conversion rate in OHBA varies from 0.63 to 0.17 ps–1 over the S1(pipi*) absorption band and the OD-deuterated analog shows no significant isotope effect. Based upon ab initio calculations and comparison with the two-ring analog, 1-hydroxy-2-acetonaphthone (HAN), we suggest that the internal conversion dynamics in OHBA is influenced by interactions with a close-lying npi* state. |
|---|
| Date de publication | 2001-02-08 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro NPARC | 12339261 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | aaa88659-1e8e-4369-889c-2102f1b366ba |
|---|
| Enregistrement créé | 2009-09-11 |
|---|
| Enregistrement modifié | 2020-03-27 |
|---|
