Chandrasekaran, M. and Noel, M. and Krishnan, V. (1990) Electroreduction of vanillin in aprotic and protic media on glassy carbon electrode. Bulletin of Electrochemistry, 06 (05). pp. 524-525. ISSN 0256-1654

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Abstract

Cyclic voltammetric behavior of vanillin on a perfectly polished glassy carbon electrode (GCE) both in aprotic and in protic solutions of various pH ranges have been studied. In aprotic solvent (DMF), vanillin undergoes two 1 e, irreversible diffusion controlled reduction. The anion radical formed undergoes a fast dimerisation process. The stability and reactivity of the anion radicals have been studied using protonating agents (H2O, 0-cresol and benzoic acid) ion-pair forming agent (LiClO4) and redox catalytic reagent (n-butyl bromide). In aqueous media – acidic, neutral and alkaline – vanillin undergoes a single irreversible wave at potentials close to the hydrogen evolution potential. Constant potential electrolysis of vanillin reduction in acidic medium yields vanillyl alcohol. On a partially pretreated/polished GC electrode, a slow time-dependent adsorption prewave is observed. However, in neutral medium, even a highly polished GC electrode gives a prewave in addition to the main wave. Such prewaves are not observed on Hg surfaces

Item Type:	Article
Uncontrolled Keywords:	Electroreduction of vanillin; Glassy carbon electrode; Cyclic voltammetry
Subjects:	Electroorganic
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	23 May 2012 09:17
Last Modified:	23 May 2012 09:17
URI:	http://cecri.csircentral.net/id/eprint/2696

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