Mechanistic studies on the formation of aminoxyl radicals from 5, 5-dimethyl-1-pyrroline-N-oxide in Fenton systems. Characterization of key precursors giving rise to …

K Makino, A Hagi, H Ide, A Murakami…

Index: Makino, Keisuke; Hagi, Akifumi; Ide, Hiroshi; Murakami, Akira; Nishi, Masatoshi Canadian Journal of Chemistry, 1992 , vol. 70, # 11 p. 2818 - 2827

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Citation Number: 45

Abstract

To assign unidentified ESR signals obtained in a Fenton system with a spin trap, 5, 5- dimethyl-1-pyrroline-N-oxide (DMPO), fundamental reactions of DMPO have been thoroughly investigated. When the concentration of Fe2+ in Fenton systems exceeded 1% of that of DMPO, background ESR signals totally distinguishable from 2-hydroxy-5, 5-dimethyl- 1-pyrrolidinyloxy (DMPO-OH) appeared, and simultaneously absorbance at 520 nm ...