Scavenging Reaction of Solvated Electron Produced by UV Laser from Iodide Anion in Liquid Beam

Article abstract of DOI:10.1021/j100016a020

A sodium iodide (NaI) solution in ethanol was introduced into vacuum as a continuous liquid flow (liquid beam) and irradiated with a 220 nm UV laser.Cluster cations containing ethoxide such as Na⁺(NaOEt), Na⁺(NaI)_n(NaOEt) (n = 1-4), and Na⁺(NaI)_n(NaOEt)2 (n = 1-4) were observed by a time-of-flight (TOF) mass spectrometer.Furthermore, addition of NH4⁺ or n-BuOH into the NaI ethanol solution resulted in suppressing the intensities of the peaks associated with these cluster ions.It is concluded that the ethoxide is produced by a scavenging reaction of a solvated electron with an ethanol molecule, and the reaction of the ethoxide formation competes with a scavenging reaction by NH4⁺ or n-BuOH.The rate equations of these competing processes predict the dependence of the ethoxide formation on the concentration of NH4⁺ or n-BuOH.Similar reaction products were observed from alcohol solutions of several iodides.