Picosecond Pulse Radiolysis Studies. I. The Solvated Electron in Aqueous and Alcohol Solutions

摘要

Observations of the solvated electron in water and the common aliphatic alcohols have been made in the time region sim;thinsp;20ndash;350 psec. Molar concentrations of acid have been used to scavengeeaqminus;andklpar;eaqminus;plus;Haqplus;rpar;has been measured as (1.2thinsp;plusmn;thinsp;0.2)thinsp;times;thinsp;1010liter/molemiddot;sec for Haqplus; from 0.5 to5.0M. The factors limiting the time response of our picosecond pulse radiolysis system are discussed. The time of formation ofesolminus;is estimated to be less than 10 psec for all solvents studied. The yield of solvated electrons in alcohols has been measured to be approximately onehyphen;third of the yield in water at picosecond times.