The Detection of Alkoxy and Other Radicals in the Gamma Radiolysis of Alcohols by an Electron Spin Resonance and Spin Trapping Method

Abstract

FREDERICK PETER SARGEKT and EDWARD M~CHAEL CARDY. Can. J. Chem. 52,3645 (1974). The radicals produced during y radiolysis of methanol, ethanol, I-propanol, 2-propanol, and t-butanol have been trapped by reaction with 2-nitroso-2-niethylpropane (t-nitrosobutane) to give nitroxides which are detected by e.s.r.All the alcohols gave alkoxy radicals and, with the exception of t-butanol, radicals derived by the loss of an H atom from the carbon atom adjacent to the OH group. Methyl radicals were detected in t-butanol.FREDERICK PETER SARGENT et EDWARD MICHAEL GARDY. Can. J. Chem. 52,3645 (1974). On a piege les radicaux produits loss de la radiolyse gamma du methanol, de l'ethanol, du propanol-I, du propanol-2, et du rerr-butanol avec du nitroso-2 methyle-2 propane (rerr-nitrosobutane) qui conduisent a des radicaux nitroxydes q~~i peuvent Etre detectes par r.p.e. R . + t-BuNO + t-BUN-R

Photodegradation of dye pollutants on one-dimensional TiO2 nanoparticles under UV and visible irradiation

“…There are two classes of EPR peaks in Fig. 6a: one is due to DMPO-• OH, and the other is due to DMPO-• H. This is in agreement with the previous studies [27][28][29]. The systems of three different catalysts produce similar amounts of • OH (Fig.…”

Direct Observation of the Radicals Formed in the Radiolysis of Liquid Benzyl Alcohol. An Electron Spin Resonance and Spin Trapping Method

“…These results show that the benzyl radicals are indeed derived from electrons and provide supporting evidence for [3].…”

“…[Ill PhCHO-+ tert-BuNO + PhCH20H -+ tert-BuNHO + PhCHO + PhCH20-These results show that the radiolysis of benzyl alcohol does indeed produce benzyl radicals and that these are derived from electrons. They do not provide concrete proof for [3] since there are other reactions of the electrons which might conceivably produce benzyl radicals but [3] is the most probable.…”

“…We have recently used the technique of spin trapping (1) to detect the intermediates formed in the radiolysis of simple alcohols (2,3). In this paper we describe its application to a study of the radiation chemistry of benzyl alcohol.…”

Spin trapping of radicals formed during radiolysis of aqueous solutions. Direct electron spin resonance observations

“…Although the spin trapping technique has been used to investigate the radiolysis of alcohols (1)(2)(3)(4) and alkanes (5,6), there has been only limited application to aqueous solutions. These have involved the use of the nitromethane aci anion, CH1=NO1-, and were therefore restricted to alkaline aqueous solutions (7).…”