Oxidation intermediates of borohydride and tetraphenylborate ions in aqueous solutions obtained by pulse radiolysis
Abstract
Absorption spectra of one-electron oxidized intermediates (the H4B· and the Ph4B· radicals) were observed upon the oxidation of H4B– and Ph4B– by the azide radical (N3·), Br2[graphic omitted], or (SCN)2[graphic omitted] in plus-irradiated solutions; the spectra have absorption maxima at 400 nm, ε= 1800 dm3 mol–1 for H4B· and at 335 nm, ε= 8600 dm3 mol–1 for cm–1 for Ph4B·.