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research article

Real-time observation of the charge transfer to solvent dynamics

Messina, Fabrizio  
•
Braem, Olivier  
•
Cannizzo, Andrea  
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2013
Nature Communications

Intermolecular electron-transfer reactions have a crucial role in biology, solution chemistry and electrochemistry. The first step of such reactions is the expulsion of the electron to the solvent, whose mechanism is determined by the structure and dynamical response of the latter. Here we visualize the electron transfer to water using ultrafast fluorescence spectroscopy with polychromatic detection from the ultraviolet to the visible region, upon photo-excitation of the so-called charge transfer to solvent states of aqueous iodide. The initial emission is short lived (similar to 60 fs) and it relaxes to a broad distribution of lower-energy charge transfer to solvent states upon rearrangement of the solvent cage. This distribution reflects the inhomogeneous character of the solvent cage around iodide. Electron ejection occurs from the relaxed charge transfer to solvent states with lifetimes of 100-400 fs that increase with decreasing emission energy.

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Type
research article
DOI
10.1038/ncomms3119
Web of Science ID

WOS:000323715700014

Author(s)
Messina, Fabrizio  
Braem, Olivier  
Cannizzo, Andrea  
Chergui, Majed  
Date Issued

2013

Publisher

Nature Publishing Group

Published in
Nature Communications
Volume

4

Article Number

2119

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSU  
Available on Infoscience
October 1, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/95769
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