ESR Studies of Uncomplexed and Complexed HO2 Radical Formed in the Reaction of H2O2 with Ce4+, Fe2+ and Ti3+ Ions

G. Czapski*, H. Levanon, A. Samuni

*Corresponding author for this work

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22 Scopus citations

Abstract

Excess of H2O2 reacting in 0.5N HClO4 with Ce4+, Ti3+ and Fe2+ yields the uncomplexed HO2 radical. This radical gives a broad ESR signal with a line width of 27±1 gauss and a g‐value of 2.0140±0.0015. The HO2 radical forms a complex with excess of Ce3+ which gives an ESR spectrum with a linewidth of 1.3±0.1 gauss and a g‐value of 2.0180±0.0005. The equilibrium between complexed [Ce3+‥HO2] and uncomplexed HO2 was studied. Two complexes are formed between HO2 and [Ti4+…H2O2]. These complexes give two ESR signals with a linewidth of 0.7 ± 0.1 and 0.5± 0.1 gauss and g‐value of 2.0140± ± 0.0005 and 2.0120± 0.0005 respectively.

Original languageEnglish
Pages (from-to)375-386
Number of pages12
JournalIsrael Journal of Chemistry
Volume7
Issue number3
DOIs
StatePublished - 1969

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