Femtosecond Time-Resolved Photoelectron Spectroscopy of the Benzyl Radical
Zitieren Sie bitte immer diese URN: urn:nbn:de:bvb:20-opus-159474
- We present a joint experimental and computational study of the nonradiative deactivation of the benzyl radical, C\(_7\)H\(_7\) after UV excitation. Femtosecond time-resolved photoelectron imaging was applied to investigate the photodynamics of the radical. The experiments were accompanied by excited state dynamics simulations using surface hopping. Benzyl has been excited at 265 nm into the D-band (\(\pi\pi^*\)) and the dynamics was probed using probe wavelengths of 398 nm or 798 nm. With 398 nm probe a single time constant of around 70-80 fsWe present a joint experimental and computational study of the nonradiative deactivation of the benzyl radical, C\(_7\)H\(_7\) after UV excitation. Femtosecond time-resolved photoelectron imaging was applied to investigate the photodynamics of the radical. The experiments were accompanied by excited state dynamics simulations using surface hopping. Benzyl has been excited at 265 nm into the D-band (\(\pi\pi^*\)) and the dynamics was probed using probe wavelengths of 398 nm or 798 nm. With 398 nm probe a single time constant of around 70-80 fs was observed. When the dynamics was probed at 798 nm, a second time constant \(\tau_2\)=1.5 ps was visible. It is assigned to further non-radiative deactivation to the lower-lying D\(_1\)/D\(_2\) states.…
Autor(en): | Anja Röder, Alexander Humeniuk, Jens Giegerich, Ingo Fischer, Lionel Poisson, Roland MitricORCiD |
---|---|
URN: | urn:nbn:de:bvb:20-opus-159474 |
Dokumentart: | Preprint (Vorabdruck) |
Institute der Universität: | Fakultät für Chemie und Pharmazie / Institut für Physikalische und Theoretische Chemie |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Physical Chemistry Chemical Physics |
Erscheinungsjahr: | 2017 |
Originalveröffentlichung / Quelle: | Physical Chemistry Chemical Physics, 2017, 19, 12365-12374. DOI: 10.1039/C7CP01437F |
URL der Erstveröffentlichung: | http://dx.doi.org/10.1039/C7CP01437F |
DOI: | https://doi.org/10.1039/C7CP01437F |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 54 Chemie / 541 Physikalische Chemie |
Freie Schlagwort(e): | Nonadiabatic dynamics; benzyl radical; time-resolved photoelectron spectroscopy |
Fachklassifikation Physik (PACS): | 30.00.00 ATOMIC AND MOLECULAR PHYSICS |
Datum der Freischaltung: | 22.03.2018 |
EU-Projektnummer / Contract (GA) number: | 646737 |
EU-Projektnummer / Contract (GA) number: | 654148 |
OpenAIRE: | OpenAIRE |
Anmerkungen: | Submitted version |
Lizenz (Deutsch): | Deutsches Urheberrecht |