Electrochemical studies p-Sulfonatocalix[4]Arene in ionic liquid as supporting electrolyte
Document Type
Article
Publication Date
1-1-2010
Abstract
The electrochemical behaviour of sodium p-sulfonatocalix[4]arene (s-psc4) was studied. In this study ionic liquid/water mixtures were used as electrolyte, namely, [BMIM][BF4]/water mixture and [BMIM][OTf]/water mixture ([BMIM] = 1 -butyl 3-methyl imidazolium, BF 4 = tetrafluoroborate, OTf = trifluoromethanesulfonate). S-psc 4 can be oxidised at 0.84 V and 0.83 V in [BMIM][BF 4]/water and [BMIM][OTf]/water respectively. The reaction is an irreversible process for both systems. The number of electron transferred in this electrochemical process is one electron and the diffusion coefficient, (D) for both systems was 1.15 × 10-8 cm2 s-1 and 1.67 × 10-8 cm2 s-1 respectively. The anodic potentials were affected by temperature and the activation energy, (Ed) was 18.18 kJ mol-1 and 18.78 kJ mol-1 in [BMIM][BF4]/water mixture and [BMIM][OTf/water mixture respectively.
Divisions
CHEMISTRY
Publication Title
Malaysian Journal of Science
Volume
29
Issue
2
Publisher
Faculty of Science, University of Malaya
Additional Information
Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA