Time-resolved photoelectron imaging of S2 → S1 internal conversion in benzene and toluene

Yoshi-Ichi Suzuki, Takuya Horio, Takao Fuji, Toshinori Suzuki
2011 Journal of Chemical Physics  
Ultrafast internal conversion of benzene and toluene from the S 2 states was studied by time-resolved photoelectron imaging with a time resolution of 22 fs. Time−energy maps of the photoelectron intensity and the angular anisotropy were generated from a series of photoelectron images. The photoelectron kinetic energy distribution exhibits a rapid energy shift and intensity revival, which indicates nuclear motion on the S 2 adiabatic surface, while the ultrafast evolution of the angular
more » ... he angular anisotropy revealed a change in the electronic character of the S 2 adiabatic surface. From their decay profiles of the total photoelectron intensity, the time constants of 48 ± 4 and 62 ± 4 fs were determined for the population decay from the S 2 states in benzene and toluene, respectively. Downloaded 17 May 2011 to 80.250.180.203. Redistribution subject to AIP license or copyright; see http://jcp.aip.org/about/rights_and_permissions 184313-2 Suzuki et al.
doi:10.1063/1.3586809 pmid:21568512 fatcat:7vcyr445nbddff4tzbb5a7xxre