First direct in situ EPR spectroelectrochemical evidence of the superoxide anion radical

A Petr; V Kataev; B Büchner

doi:10.1021/jp206540c

First direct in situ EPR spectroelectrochemical evidence of the superoxide anion radical

J Phys Chem B. 2011 Oct 27;115(42):12036-9. doi: 10.1021/jp206540c. Epub 2011 Sep 30.

Authors

A Petr¹, V Kataev, B Büchner

Affiliation

¹ Leibniz Institute for Solid State and Materials Research IFW Dresden , PF 270116, D-01171 Dresden, Germany.

PMID: 21923142
DOI: 10.1021/jp206540c

Abstract

For the first time, the superoxide anion radical was formed by electrochemical reduction of oxygen and detected in situ by EPR spectroscopy without changing the temperature. The spin susceptibilities of solid superoxide solutions were measured between 280 and 4 K showing Curie behavior. The EPR results were explained in the frame of an ion association and support the formation of a loose ion pair between the superoxide anion radical and the potassium crown ether complex. An alternative explanation for the large EPR line width of the superoxide anion radical at higher temperatures is given.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anions / chemistry
Electron Spin Resonance Spectroscopy*
Superoxides / chemistry*
Temperature

Substances

Anions
Superoxides