Distance dependence of the reaction rate for the reduction of metal cations by solvated electrons : a picosecond pulse radiolysis study - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry A Année : 2010

Distance dependence of the reaction rate for the reduction of metal cations by solvated electrons : a picosecond pulse radiolysis study

Résumé

The decay of the solvated electron generated by picosecond electron pulse radiolysis is studied by broad-band transient absorption measurements in ethylene glycol solutions containing decimolar concentrations of Cu2+, Ni2+, and Pb2+ metal cations. Analysis of the nonexponential kinetics of the decays reveals molecular parameters of the electron transfer reaction. It is found that the reaction occurs at long distance for Cu2+ solutions and is only limited to contact distance in the case of Ni2+ solutions. The distribution of reaction distance strongly depends on the free enthalpy change of the reactions.
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hal-00561935 , version 1 (02-02-2011)

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U. Schmidhammer, P. Pernot, V. de Waele, P. Jeunesse, Alexandre Demarque, et al.. Distance dependence of the reaction rate for the reduction of metal cations by solvated electrons : a picosecond pulse radiolysis study. Journal of Physical Chemistry A, 2010, 114, pp.12042 - 12051. ⟨10.1021/jp107278w⟩. ⟨hal-00561935⟩
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