Temperature and solvent dependence of electron scavenging efficiency in polar liquids: water and alcohols

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Abstract
High concentrations of electron scavengers reduce the initial yield of esol− and its precursor, et−. The scavenging efficiency of a solute is inversely proportional to its C37 value, the solute concentration required to reduce the initial electron yield to 37% of the yield with no scavenger present. Over a range of 40 to −60 °C the C37 value for a given scavenger is almost constant, and is the same for esol− and et−. In water and alcohols, the C37 value is not correlated with the time required for solvation of the electron, τs, or the static dielectric constant, εs, but rather with the concentration of oxygen atoms in the solvent. These results support the model in which the scavenging of a mobile electron occurs before the electron is trapped in the solvent.

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