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Applications of the channel flow cell for UV-visible spectroelectrochemical studies. Part 2: Transient signals |
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| Authors: | Rui Lin Wang Kin Yip Tam Frank Marken Richard G Compton |
| Institution: | 1. Department of Chemistry, Sichuan Union University, Chengdu, 610064, P.R. China
Department of Chemistry, Sichuan Union University, Chengdu, 610064, P.R. China;2. Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK |
| 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 cm2 s−1) is very close to that of the parent molecule (1.57 ± 0.03 × 10−5 cm2 s−1). |
| Keywords: | Spectroelectrochemistry Diffusion coefficient Tris(4-bromophenyl)amine |