Peroxyl-radical reactions, radiation-induced

In the presence of 02, most radicals are converted into the corresponding per-oxyl radicals with the notable exception of heteroatom-centered radicals which do not react with 02 at an appreciable rate (Chap. 8.2). However, even though peroxyl radical reactions may dominate in the reactions induced by the autoxi-dation of Fe(II)EDTA or Fe(II)NTA (Chap. 2.5), in the case of 2 -deoxynucleo-sides the subsequent reactions seem to be considerably modified by the presence of the transition metal ion, i.e. product ratios are found in these reactions which are different from those observed by ionizing radiation in the absence of Fe(II)/ Fe(III) (Murata-Kamiya et al. 1998). A basis for understanding these differences may be the various redox reactions that the peroxyl radicals will undergo with Fe(II)/Fe(III) (cf. Yurkova et al. 1999 Theruvathu et al. 2001 see also Chaps 2.5 and 8.3). 

Ellison DH, Salmon GA, Wilkinson F (1972) Nanosecond pulse radiolysis of methanolic and aqueous solutions of readily oxidizable solutes. Proc R Soc Lond A 328 23-36 Erben-Russ M, Bors W, Saran M (1987) Reactions of linoleic acid peroxyl radicals with phenolic antioxidants a pulse radiolysis study. Int J Radiat Biol 52 393-412 Eriksen TE, Fransson G (1988) Radical-induced oxidation of glutathione in alkaline aqueous solution. Radiat Phys Chem 32 163-167... 

Another important aspect that has been well addressed " is on the radiation-induced degradation of benzene and its derivatives in aqueous solution. The Advanced Oxidation Processes (e.g. Oj-HjOj, HjOj-UV, electron beam) make use of the highly reactive OH radical in the degradation of water pollutants. Radiation chemical methods are superior to other methods (Fenton or photolysis) in the generation of peroxyl radicals from the reaction of OH adducts. 

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