| Autre titre | Excited state dynamics of CH2I2 and CH2BrI studied with UV pump VUV probe photoelectron spectroscopy |
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| DOI | Trouver le DOI : https://doi.org/10.1063/1.5086665 |
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| Auteur | Rechercher : Horton, Spencer L.Identifiant ORCID : https://orcid.org/0000-0002-4380-4485; Rechercher : Liu, Yusong; Rechercher : Forbes, Ruaridh; Rechercher : Makhija, Varun; Rechercher : Lausten, Rune1; Rechercher : Stolow, Albert1; Rechercher : Hockett, Paul1; Rechercher : Marquetand, PhilippIdentifiant ORCID : https://orcid.org/0000-0002-8711-1533; Rechercher : Rozgonyi, Tamás; Rechercher : Weinacht, ThomasIdentifiant ORCID : https://orcid.org/0000-0001-9343-7276 |
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| Affiliation | - Conseil national de recherches du Canada. Technologies de sécurité et de rupture
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| Format | Texte, Article |
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| Résumé | We compare the excited state dynamics of diiodomethane (CH₂I₂) and bromoiodomethane (CH₂BrI) using time resolved photoelectron spectroscopy. A 4.65 eV UV pump pulse launches a dissociative wave packet on excited states of both molecules and the ensuing dynamics are probed via photoionization using a 7.75 eV probe pulse. The resulting photoelectrons are measured with the velocity map imaging technique for each pump-probe delay. Our measurements highlight differences in the dynamics for the two molecules, which are interpreted with high-level ab initio molecular dynamics (trajectory surface hopping) calculations. Our analysis allows us to associate features in the photoelectron spectrum with different portions of the excited state wave packet represented by different trajectories. The excited state dynamics in bromoiodomethane are simple and can be described in terms of direct dissociation along the C–I coordinate, whereas the dynamics in diiodomethane involve internal conversion and motion along multiple dimensions. |
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| Date de publication | 2019-05-07 |
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| Maison d’édition | American Institute of Physics |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | f05fc3a3-a12a-44d8-8c57-be953b151e47 |
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| Enregistrement créé | 2021-03-04 |
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| Enregistrement modifié | 2021-03-04 |
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