Abstract

The use of the channel flow cell for ultraviolet-visible (UV-vis) spectroelectrochemical experiments has been developed to determine the diffusion coefficients of electrogenerated species by means of monitoring the transient absorbance response resulting from a potential step at a working electrode immediately upstream of the incident spectrophotometric beam. The technique is applied to measure the diffusion coefficient of tris(4-bromophenyl)amine (TBPA) radical cation in acetonitrile at 25°C. It is shown that the diffusion coefficient of electrogenerated TBPA radical cation (1.64 ± 0.02 × 10-5 cm-2 s-1) is very close to that of the parent molecule (1.57 ± 0.03 × 10-5 cm2 s-1).

Original languageEnglish
Pages (from-to)284-287
Number of pages4
JournalElectroanalysis
Volume9
Issue number4
DOIs
Publication statusPublished - Mar 1997

Keywords

  • Diffusion coefficient
  • Spectroelectrochemistry
  • Tris(4-bromophenyl)amine

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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