Stability and kinetics of generated superoxide ion in trifluoromethanesulfonate anion-based ionic liquids

Maan Hayyan; Farouq S. Mjalli; Inas M. AlNashef; Mohd Ali Hashim

Stability and kinetics of generated superoxide ion in trifluoromethanesulfonate anion-based ionic liquids

Maan Hayyan^*, Farouq S. Mjalli, Inas M. AlNashef, Mohd Ali Hashim

^*Corresponding author for this work

Petroleum and Chemical Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

The generation and long-term stability of superoxide ion (O₂^•-) in two trifluoromethanesulfonate [TfO]^- anion-based ionic liquids (ILs), with cations of 1-butyl-1-methylpyrrolidinium [BMPyrr]⁺ and 1-butyl-2,3-dimethylimidazolium [BDMIm]⁺ have been investigated. The electrochemical generation was carried out by reducing O² to O₂^•- in ILs and was analyzed using a cyclic voltammetry (CV) technique. The chemical generation of O₂^•- in ILs was carried out by the solvation of potassium superoxide (KO²) in the aprotic solvent, dimethyl sulfoxide, in the presence of the corresponding IL. Long-term stability of generated O₂^•- in ILs was examined using UV-visible spectrophotometery at an absorbance range of 190-400 nm. It was found that the [BMPyrr]⁺ based IL has a lower O₂^•- consumption rate than the [BDMIm]⁺ based ILs indicating that [BMPyrr][TfO] offers a promising long-term stability of O₂^•- for various reactions and applications. This work represents the first attempt for using the [TfO]^- based ILs as media for the chemical and electrochemical generation of O₂^•-.

Original language	English
Pages (from-to)	9658-9667
Number of pages	10
Journal	International Journal of Electrochemical Science
Volume	7
Issue number	10
Publication status	Published - 2012

Keywords

Cyclic voltammetry
Imidazolium cation
Ionic liquids
Long-term stability
Pyrrolidinium cation
Superoxide ion
Trifluoromethanesulfonate anion

ASJC Scopus subject areas

Electrochemistry

Cite this

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title = "Stability and kinetics of generated superoxide ion in trifluoromethanesulfonate anion-based ionic liquids",

abstract = "The generation and long-term stability of superoxide ion (O2•-) in two trifluoromethanesulfonate [TfO]- anion-based ionic liquids (ILs), with cations of 1-butyl-1-methylpyrrolidinium [BMPyrr]+ and 1-butyl-2,3-dimethylimidazolium [BDMIm]+ have been investigated. The electrochemical generation was carried out by reducing O2 to O2•- in ILs and was analyzed using a cyclic voltammetry (CV) technique. The chemical generation of O2•- in ILs was carried out by the solvation of potassium superoxide (KO2) in the aprotic solvent, dimethyl sulfoxide, in the presence of the corresponding IL. Long-term stability of generated O2•- in ILs was examined using UV-visible spectrophotometery at an absorbance range of 190-400 nm. It was found that the [BMPyrr]+ based IL has a lower O2•- consumption rate than the [BDMIm]+ based ILs indicating that [BMPyrr][TfO] offers a promising long-term stability of O2•- for various reactions and applications. This work represents the first attempt for using the [TfO]- based ILs as media for the chemical and electrochemical generation of O2•-.",

keywords = "Cyclic voltammetry, Imidazolium cation, Ionic liquids, Long-term stability, Pyrrolidinium cation, Superoxide ion, Trifluoromethanesulfonate anion",

author = "Maan Hayyan and Mjalli, {Farouq S.} and AlNashef, {Inas M.} and Hashim, {Mohd Ali}",

year = "2012",

language = "English",

volume = "7",

pages = "9658--9667",

journal = "International Journal of Electrochemical Science",

issn = "1452-3981",

publisher = "Electrochemical Science Group",

number = "10",

}

TY - JOUR

T1 - Stability and kinetics of generated superoxide ion in trifluoromethanesulfonate anion-based ionic liquids

AU - Hayyan, Maan

AU - Mjalli, Farouq S.

AU - AlNashef, Inas M.

AU - Hashim, Mohd Ali

PY - 2012

Y1 - 2012

N2 - The generation and long-term stability of superoxide ion (O2•-) in two trifluoromethanesulfonate [TfO]- anion-based ionic liquids (ILs), with cations of 1-butyl-1-methylpyrrolidinium [BMPyrr]+ and 1-butyl-2,3-dimethylimidazolium [BDMIm]+ have been investigated. The electrochemical generation was carried out by reducing O2 to O2•- in ILs and was analyzed using a cyclic voltammetry (CV) technique. The chemical generation of O2•- in ILs was carried out by the solvation of potassium superoxide (KO2) in the aprotic solvent, dimethyl sulfoxide, in the presence of the corresponding IL. Long-term stability of generated O2•- in ILs was examined using UV-visible spectrophotometery at an absorbance range of 190-400 nm. It was found that the [BMPyrr]+ based IL has a lower O2•- consumption rate than the [BDMIm]+ based ILs indicating that [BMPyrr][TfO] offers a promising long-term stability of O2•- for various reactions and applications. This work represents the first attempt for using the [TfO]- based ILs as media for the chemical and electrochemical generation of O2•-.

AB - The generation and long-term stability of superoxide ion (O2•-) in two trifluoromethanesulfonate [TfO]- anion-based ionic liquids (ILs), with cations of 1-butyl-1-methylpyrrolidinium [BMPyrr]+ and 1-butyl-2,3-dimethylimidazolium [BDMIm]+ have been investigated. The electrochemical generation was carried out by reducing O2 to O2•- in ILs and was analyzed using a cyclic voltammetry (CV) technique. The chemical generation of O2•- in ILs was carried out by the solvation of potassium superoxide (KO2) in the aprotic solvent, dimethyl sulfoxide, in the presence of the corresponding IL. Long-term stability of generated O2•- in ILs was examined using UV-visible spectrophotometery at an absorbance range of 190-400 nm. It was found that the [BMPyrr]+ based IL has a lower O2•- consumption rate than the [BDMIm]+ based ILs indicating that [BMPyrr][TfO] offers a promising long-term stability of O2•- for various reactions and applications. This work represents the first attempt for using the [TfO]- based ILs as media for the chemical and electrochemical generation of O2•-.

KW - Cyclic voltammetry

KW - Imidazolium cation

KW - Ionic liquids

KW - Long-term stability

KW - Pyrrolidinium cation

KW - Superoxide ion

KW - Trifluoromethanesulfonate anion

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M3 - Article

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SN - 1452-3981

VL - 7

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JO - International Journal of Electrochemical Science

JF - International Journal of Electrochemical Science

IS - 10

ER -

Stability and kinetics of generated superoxide ion in trifluoromethanesulfonate anion-based ionic liquids

Abstract

Keywords

ASJC Scopus subject areas

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