Electrochemical behaviour of tetra- n-butylammonium nonaflate as an ionic liquid and as a supporting electrolyte in aprotic solvents: A comparative study

► Tetra- n-butylammonium nonaflate as ionic liquid and as supporting electrolyte in different media were investigated. ► Electrochemical oxidation of ferrocene, hydroquinone and reduction of anthracene were studied. ► Charge transfer rate, diffusion coefficient and viscosity correlation were discuss...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2011-05, Vol.655 (1), p.79-86
Main Authors: Manivel, Arumugam, Velayutham, David, Noel, Michael
Format: Article
Language:English
Subjects:
acetonitrile
anthracenes
Chemistry
diffusivity
Electrochemical oxidation
Electrochemical reduction
Electrochemistry
electrolytes
Exact sciences and technology
free radicals
General and physical chemistry
hydroquinone
Ionic liquid
ionic liquids
Kinetics and mechanism of reactions
mass transfer
oxidation
Properties of electrolytes: conductivity
propylene
Supporting electrolyte
Tetra- n-butylammonium nonaflate
viscosity
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Summary:► Tetra- n-butylammonium nonaflate as ionic liquid and as supporting electrolyte in different media were investigated. ► Electrochemical oxidation of ferrocene, hydroquinone and reduction of anthracene were studied. ► Charge transfer rate, diffusion coefficient and viscosity correlation were discussed. Tetra- n-butylammonium nonaflate was synthesized, characterized and employed as a neat ionic liquid and as supporting electrolyte in acetonitrile, N, N′-dimethylformamide, propylene carbonate and sulfolane media. The electrochemical oxidation of ferrocene and hydroquinone as well as the electrochemical reduction of anthracene were investigated in all the media. Good correlation is established between the charge transfer rate, diffusion coefficient of all the three redox species and the viscosity of the five electrolyte media employed. The viscosity dependent solvation dynamics of the redox molecules thus appear to influence the charge transfer and mass transport behaviour in quite similar fashion over a wide viscosity range. The chemical stability and stability of electrogenerated free radicals however depend on the nature of the solvent rather than the viscosity.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2011.02.004