| DOI | Trouver le DOI : https://doi.org/10.1126/science.abf1656 |
|---|
| Auteur | Rechercher : Zinchenko, Kristina S.Identifiant ORCID : https://orcid.org/0000-0002-2440-3811; Rechercher : Ardana-Lamas, FernandoIdentifiant ORCID : https://orcid.org/0000-0001-9028-5051; Rechercher : Seidu, Issaka1Identifiant ORCID : https://orcid.org/0000-0002-9815-0132; Rechercher : Neville, Simon P.1Identifiant ORCID : https://orcid.org/0000-0001-8134-1883; Rechercher : Van Der Veen, Joscelyn1Identifiant ORCID : https://orcid.org/0000-0002-9407-6449; Rechercher : Lanfaloni, Valentina UtrioIdentifiant ORCID : https://orcid.org/0000-0002-5390-3065; Rechercher : Schuurman, Michael S.1Identifiant ORCID : https://orcid.org/0000-0002-0922-9034; Rechercher : Wörner, Hans JakobIdentifiant ORCID : https://orcid.org/0000-0002-8877-0872 |
|---|
| Affiliation | - Conseil national de recherches du Canada. Technologies de sécurité et de rupture
|
|---|
| Format | Texte, Article |
|---|
| Résumé | Conical intersections allow electronically excited molecules to return to their electronic ground state. Here, we observe the fastest electronic relaxation dynamics measured to date by extending attosecond transient-absorption spectroscopy (ATAS) to the carbon K-edge. We selectively launch wave packets in the two lowest electronic states (D₀ and D₁) of C₂H₄⁺. The electronic D₁ → D₀ relaxation takes place with a short time constant of 6.8 ± 0.2 femtoseconds. The electronic-state switching is directly visualized in ATAS owing to a spectral separation of the D₁ and D₀ bands caused by electron correlation. Multidimensional structural dynamics of the molecule are simultaneously observed. Our results demonstrate the capability to resolve the fastest electronic and structural dynamics in the broad class of organic molecules. They show that electronic relaxation in the prototypical organic chromophore can take place within less than a single vibrational period. |
|---|
| Date de publication | 2021-01-29 |
|---|
| Maison d’édition | American Association for the Advancement of Science |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | ec16270e-1d82-41ec-85f8-1240cac058e6 |
|---|
| Enregistrement créé | 2021-06-30 |
|---|
| Enregistrement modifié | 2021-07-02 |
|---|
