Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 12, Issue 48, Pages 15607-15615Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c001671c
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Funding
- EPSRC
- Ramsay Trust
- UCL
- Engineering and Physical Sciences Research Council [GR/T20304/01] Funding Source: researchfish
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We report new, detailed, femtosecond time-resolved photoelectron spectroscopy experiments and calculations investigating the competition between ultrafast internal conversion and ultrafast intersystem crossing in electronically and vibrationally excited benzene at the onset of channel 3. Using different probe energies to record the total photoelectron yield as a function of pump-probe delay we are able to confirm that S-1, T-1 and T-2 electronic states are involved in the excited state dynamics. Time-resolved photoelectron spectroscopy measurements then allow us to unravel the evolution of the S-1, T-1 and T-2 components of the excited state population and, together with complementary quantum chemistry and quantum dynamics calculations, support our earlier proposal that ultrafast intersystem crossing competes with internal conversion (Chem. Phys. Lett., 2009, 469, 43).
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