Time-resolved photoelectron imaging of the chloranil radical anion: ultrafast relaxation of electronically excited electron acceptor states

Horke, D.A.; Verlet, J.R.R.

Abstract

The spectroscopy and dynamics of near-threshold excited states of the isolated chloranil radical anion are investigated using photoelectron imaging. The photoelectron images taken at 480 nm clearly indicate resonance-enhanced photodetachment via a bound electronic excited state. Time-resolved photoelectron imaging reveals that the excited state rapidly decays on a timescale of 130 fs via internal conversion. The ultrafast relaxation dynamics of excited states near threshold are pertinent to common electron acceptor molecules based on the quinone moiety and may serve as doorway states that enable efficient electron transfer in the highly exergonic inverted regime, despite the presence of large free energy barriers.

Citation

Horke, D., & Verlet, J. (2011). Time-resolved photoelectron imaging of the chloranil radical anion: ultrafast relaxation of electronically excited electron acceptor states. Physical Chemistry Chemical Physics, 13(43), 19546-19552. https://doi.org/10.1039/c1cp22237f

• Journal Article Type: Article
• Acceptance Date: Sep 9, 2011
• Publication Date: Nov 21, 2011
• Deposit Date: Jan 30, 2012
• Publicly Available Date: Feb 5, 2016
• Journal: Physical Chemistry Chemical Physics
• Print ISSN: 1463-9076
• Electronic ISSN: 1463-9084
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 13
• Issue: 43
• Pages: 19546-19552
• DOI: https://doi.org/10.1039/c1cp22237f
• Public URL: https://durham-repository.worktribe.com/output/1511503