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  • 1
    Electronic Resource
    Electronic Resource
    Applications of the channel flow cell for UV-visible spectroelectrochemical studies. Part 2: Transient signals (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 284-287 
    Details
    ISSN: 1040-0397
    Keywords: Spectroelectrochemistry ; Diffusion coefficient ; Tris(4-bromophenyl)amine ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 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).
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140090404
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Applications of the channel flow cell for UV-visible spectroelectrochemical studies: The kinetics of dimerization of the methyl viologen radical cation (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 219-224 
    Details
    ISSN: 1040-0397
    Keywords: Spectroelectrochemistry ; Methyl viologen ; Dimerization ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A channel flow cell specifically designed for ultraviolet-visible spectroelectrochemical experiments is described. The performance of the cell was characterized using the oxidation of N,N, N′, N′-tetramethyl-p-phenylenediamine in aqueous electrolytes and excellent agreement between theory and experiment was obtained. The technique was applied to study the dimerization rate of methyl viologen radical cations. The mechanistic results confirm that the electrogenerated methyl viologen radical cation dimerizes rapidly in aqueous solution and a previously unknown dimerization rate constant close to 104 M-1 s-1 is reported.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140090306
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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