ISSN:
1040-0397
Keywords:
Chemically modified electrode
;
Redox mediator
;
Anodic oxidation
;
Benzylalcohols
;
Benzaldehydes
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Cerium(III) species have been immobilized in Nafion films coated on a glassy carbon electrode by a dipping method. The redox activity was characterized in aqueous acidic solutions by cyclic voltammetry. The redox process was diffusion-limited, suggesting that the cerium(III) species distributed in the multilayer of Nafion and that the diffusion of the charge-compensating anion in the film was rate-controlling. The cerium(III)-immobilized Nafion films showed a mediation activity for the electrochemical oxidation of substituted benzylalcohols to yield corresponding arylaldehydes and carboxylic acids. The activity and the selectivity of the process depended on the oxidation potential of the substrate compound. Macroelectrolysis of p-nitrobenzylalcohol using cerium(III)-immobilized electrodes gave corresponding p-nitrobenzaldehyde with a high rate and selectivity.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140080823
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