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Kinetics and Thermodynamics of Redox Processes in Room Temperature Ionic Liquids: The Use of Voltammetry and the Disproportionation of Radical Cations of N,N-Dimethyl-p-phenylenediamine in 1-Butyl-3-methylimidazolium Tetrafluoroborate
- Source :
- Journal of Chemical & Engineering Data. 55:2219-2224
- Publication Year :
- 2009
- Publisher :
- American Chemical Society (ACS), 2009.
-
Abstract
- The voltammetry of N,N-dimethyl-p-phenylenediamine, DMPD, in the room temperature ionic liquid (RTIL) 1-butyl-3-methylimidazolium tetrafluoroborate, [C4mim][BF4] is studied by means of microdisc voltammetry over a wide range of voltage scan rates incorporating the transition from linear to convergent diffusion. Two voltammetric waves were recorded corresponding to the formation of the radical cation DMPD+ and dication DMPD 2+; both are stable on the voltammetric time scale. Double potential step chronoamperometry was used to measure the diffusion coefficients of DMPD and DMPD+. These values, in conjunction with simulations of the cyclic voltammetry, permit the inference of the equilibrium constant and kinetics for the comproportionation of DMPD and DMPD2+ forming DMPD+ to be studied. © 2009 American Chemical Society.
Details
- ISSN :
- 15205134 and 00219568
- Volume :
- 55
- Database :
- OpenAIRE
- Journal :
- Journal of Chemical & Engineering Data
- Accession number :
- edsair.doi.dedup.....411223134a039f79e1791b2100e3ea4b