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Pozo-Gonzalo C, Torriero AA, Forsyth M, et al. Redox Chemistry of the Superoxide Ion in a Phosphonium-Based Ionic Liquid in the Presence of Water. J Phys Chem Lett. 2013;4(11):1834-7doi: 10.1021/jz400715r.
Pozo-Gonzalo, C., Torriero, A. A., Forsyth, M., MacFarlane, D. R., & Howlett, P. C. (2013). Redox Chemistry of the Superoxide Ion in a Phosphonium-Based Ionic Liquid in the Presence of Water. The journal of physical chemistry letters, 4(11), 1834-7. https://doi.org/10.1021/jz400715r
Pozo-Gonzalo, Cristina, et al. "Redox Chemistry of the Superoxide Ion in a Phosphonium-Based Ionic Liquid in the Presence of Water." The journal of physical chemistry letters vol. 4,11 (2013): 1834-7. doi: https://doi.org/10.1021/jz400715r
Pozo-Gonzalo C, Torriero AA, Forsyth M, MacFarlane DR, Howlett PC. Redox Chemistry of the Superoxide Ion in a Phosphonium-Based Ionic Liquid in the Presence of Water. J Phys Chem Lett. 2013 Jun 06;4(11):1834-7. doi: 10.1021/jz400715r. Epub 2013 May 17. PMID: 26283117.
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J Phys Chem Lett. 2013 Jun 06;4(11):1834-7. doi: 10.1021/jz400715r. Epub 2013 May 17.

Redox Chemistry of the Superoxide Ion in a Phosphonium-Based Ionic Liquid in the Presence of Water.

The journal of physical chemistry letters

Cristina Pozo-Gonzalo, Angel A J Torriero, Maria Forsyth, Douglas R MacFarlane, Patrick C Howlett

Affiliations

  1. †ARC Centre of Excellence for Electromaterials Science, IFM-Institute for Frontier Materials, Deakin University, 221 Burwood Hwy, Burwood, Victoria 3125, Australia.
  2. ‡ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia.

PMID: 26283117 DOI: 10.1021/jz400715r

Abstract

Stable electrogenerated superoxide ion has been observed for the first time in a phosphonium-based ionic liquid in the presence of water, leading to a chemically reversible O2/O2(•-) redox couple instead of the disproportionation reaction that is usually observed. It appears that the cation solvates the superoxide anion, stabilizing it against the disproportionation reaction. The electrogeneration is studied at various levels of water or other diluents including toluene to explore the limits of stability of the superoxide ion under these conditions.

Keywords: ionic liquids; oxygen reduction reaction; superoxide anion

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