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

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

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةمراجعة النظراء

15 اقتباسات (Scopus)

ملخص

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•-.

اللغة الأصليةEnglish
الصفحات (من إلى)9658-9667
عدد الصفحات10
دوريةInternational Journal of Electrochemical Science
مستوى الصوت7
رقم الإصدار10
حالة النشرPublished - 2012

ASJC Scopus subject areas

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