Selective detection of dopamine using a functionalised polyaniline composite electrode
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Selective detection of dopamine using a functionalised polyaniline composite electrode
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| Creator |
Mathiyarasu, J.
Senthilkumar, S. Phani, K.L.N. Yegnaraman, V. |
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| Subject |
Electrodics and Electrocatalysis
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| Description |
The behaviour of a poly (aniline boronic acid) (PABA) modified glassy carbon electrode (GCE) for the detection of
dopamine (DA) in the presence of excess of ascorbic acid (AA) using cyclic voltammetry (CV) and differential pulse
voltammetry (DPV) techniques is investigated. On bare GCE, both DA and AA are oxidized at �0.16 V, whereas
on PABA modified GCE they are oxidized at 0.2 and 0.054 V, respectively. Though PABA favours DA oxidation
through ester formation with boronic acid motif, the AA oxidation is also promoted by polyaniline backbone
through the involvement of AA in the redox of polyaniline. Since both DA and AA undergo oxidation at closely
spaced potentials at a PABA electrode, Nafion�-incorporation into the PABA film was examined for selective
determination of DA in the presence of AA. The selectivity was due to accumulation of DA on the electrode surface
through ester formation with the boronic acid group and suppression of AA oxidative current through charge
discrimination by Nafion.
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| Publisher |
Springer
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/78/1/039-2005.pdf
Mathiyarasu, J. and Senthilkumar, S. and Phani, K.L.N. and Yegnaraman, V. (2005) Selective detection of dopamine using a functionalised polyaniline composite electrode. Journal of Applied Electrochemistry, 35 (5). pp. 513-519. |
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| Relation |
http://cecri.csircentral.net/78/
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