Femtosecond Time-Resolved Photoelectron Spectroscopy of the Benzyl Radical

Please always quote using this 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.show moreshow less
Metadaten
Author: Anja Röder, Alexander Humeniuk, Jens Giegerich, Ingo Fischer, Lionel Poisson, Roland MitricORCiD
URN:urn:nbn:de:bvb:20-opus-159474
Document Type:Preprint
Faculties:Fakultät für Chemie und Pharmazie / Institut für Physikalische und Theoretische Chemie
Language:English
Parent Title (English):Physical Chemistry Chemical Physics
Year of Completion:2017
Source:Physical Chemistry Chemical Physics, 2017, 19, 12365-12374. DOI: 10.1039/C7CP01437F
URL:http://dx.doi.org/10.1039/C7CP01437F
DOI:https://doi.org/10.1039/C7CP01437F
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 541 Physikalische Chemie
Tag:Nonadiabatic dynamics; benzyl radical; time-resolved photoelectron spectroscopy
PACS-Classification:30.00.00 ATOMIC AND MOLECULAR PHYSICS
Release Date:2018/03/22
Note:
Submitted version
EU-Project number / Contract (GA) number:646737
EU-Project number / Contract (GA) number:654148
OpenAIRE:OpenAIRE
Licence (German):License LogoDeutsches Urheberrecht