Abstract : In liquids and electrolyte solutions, elementary radical reactions may be investigated on the time scale of molecular motions by femtosecond visible-IR absorption spectroscopy. Some studies devoted to the microscopic understanding of sub-picosecond prehydration electron transfer between an aqueous halide ion (Cl-) and ionic acceptors (Cd++, H+) are presented. Within an electron hydration regime, the one-electron reduction of a metallic ion or a hydrated proton (hydronium or dihydronium ion) is totally achieved in less than 2 × 10^-12 s at 294 K. The consequences of an early partition between reactive and nonreactive IR electronic pathways on the electron hydration process are discussed.
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Submitted on : Tuesday, March 15, 2011 - 1:47:30 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:02 AM
Yann Gauduel, Abdeslem Hallou. Recent advances in prethermal chemistry: real-time probing of elementary electron transfer reactions. Research on Chemical Intermediates, Springer Verlag, 2001, 27 (4-5), pp.359-377. ⟨hal-00576797⟩
