Kinetics of homogeneous reactions in ionic liquids

Inas M. AlNashef, Maan Hayyan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this work, the double potential step chronoamperometry (DPSC) was used to determine the rate constants for the homogeneous reactions of alcohols with superoxide ion (O2·-) at different temperatures in ionic liquids (ILs). The technique was first tested by determining the pseudo first order rate constant for reduction of azobenzene to hydroazobenzene that, in turn, undergoes the benzidine rearrangement. The results were in good agreement with values reported in the literature using DPSC and conventional kinetic methods. The pseudo first order rate constant for the homogeneous reaction of O2·-- with different primary and secondary alcohols in 1-butyl-3-methylimidazolium hexafluorophosphate [bmim][HFP] and 1,2-dimethyl-3-n-butylimidazolium hexafluorophosphate [bdmim][HFP] at different temperatures was then determined. The Arrhenius plot was used to determine the activation energy and pre-exponential factor for the corresponding reactions.

Original languageBritish English
Pages (from-to)8236-8254
Number of pages19
JournalInternational Journal of Electrochemical Science
Volume7
Issue number9
StatePublished - 2012

Keywords

  • Double potential step chronoamperometry
  • Imidazolium cation
  • Ionic liquid
  • Superoxide ion

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