Trapped electron spectra in hydrates of sodium, potassium and tetraalkylammonium hydroxides of varying H2O content

Transient spectra of e-sub(t) in hydrates at room temperature obtained by pulse radiolysis with Cerenkov L.S.M. are presented. The decrease in number of H2O molecules n, in KOH.nH2O and NaOH.nH2O is accompanied by a blue shift of the absorption maximum. The same tendency is observed in concentrated solutions. The shifts in tetraalkylammonium hydroxides are not as extended as in KOH and NaOH systems, because TAAH's coordinate more H2O molecules and the preparation of solution of higher concentration is not possible. Freezing of hydrates does not change the e-sub(t) spectrum considerably. The concept of the trap containing one molecule of water and one electron is discussed in the general context of the phenomena. (author)