Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 114, Issue 42, Pages 11216-11224Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp1028855
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Funding
- Durham University
- EPSRC [EP/D073472/1]
- EPSRC [EP/D073472/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D073472/1] Funding Source: researchfish
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Time-resolved photoelectron imaging of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion is presented. Photoelectron angular distributions.(PADs) are qualitatively analyzed in terms of the simple s-p model that is based on symmetry arguments. The internal conversion dynamics from the first excited state (1(2)B(3u)) to the ground state (B-2(2g)) may be observed through temporal changes in the PADs of the spectrally overlapping photoelectron features arising from photodetachment of the ground state and the excited state. A formulism for extracting the population dynamics from the beta(2) anisotropy parameter of overlapping spectroscopic features is presented. This is used to extract the lifetime of the first excited state, which is in good agreement with that observed in the time-resolved photoelectron spectra.
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