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Applications of the channel flow cell for UV‐visible spectroelectrochemical studies. Part 2: Transient signals
Author(s) -
Wang Rui Lin,
Tam Kin Yip,
Marken Frank,
Compton Richard G.
Publication year - 1997
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140090404
Subject(s) - transient (computer programming) , channel (broadcasting) , flow (mathematics) , chemistry , materials science , computer science , photochemistry , optoelectronics , physics , mechanics , telecommunications , operating system
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 cm 2 s −1 ).