Effect of Tartaric Acid on the Electrochemical Behavior of K3[Fe(CN)6] on the Electrodes Coated with Cyclodextrin Modified Multi-Walled Carbon Nanotubes

Hai Tao Wang; Shi Zhao Kang; Qiu Ling Yang; Jin Mu

doi:10.4028/www.scientific.net/AMR.781-784.346

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 781-784Effect of Tartaric Acid on the Electrochemical...

Effect of Tartaric Acid on the Electrochemical Behavior of K₃[Fe(CN)₆] on the Electrodes Coated with Cyclodextrin Modified Multi-Walled Carbon Nanotubes

Abstract:

The effect of tartaric acid on the electrochemical behavior of K₃[Fe(CN)₆] was investigated on bare ITO electrodes, electrodes coated with multi-walled carbon nanotubes possessing carboxyl groups (MWNT-COOHs), and electrodes coated with cyclodextrin modified multi-walled carbon nanotubes (MWNT-CDs), respectively. It is found that the molecular chirality of tartaric acid can hardly influence the electrochemical behavior of K₃[Fe(CN)₆] on bare ITO electrodes. When the electrodes coated with MWNT-COOHs are used, the effect of the molecular chirality becomes distinguish. In the case of the electrodes coated with MWNT-CDs, the enhanced chiral discrimination between D-tartaric acid (D-TA) and L-tartaric acid (L-TA) can be observed. The control step in the electrochemical reaction of K₃[Fe(CN)₆] on the electrodes coated with MWNT-CDs is deduced to be different when D-TA or L-TA is introduced into the solution, respectively. Therefore, the enhanced chiral discrimination on the electrodes coated with MWNT-CDs is probably due to the change of the control step in the electrochemical reaction of K₃[Fe(CN)₆] caused by the chiral recognition of cyclodextrin moieties to D-TA and L-TA.

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Advanced Materials Research (Volumes 781-784)

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346-351

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https://doi.org/10.4028/www.scientific.net/AMR.781-784.346

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Online since:

September 2013

Authors:

Hai Tao Wang, Shi Zhao Kang, Qiu Ling Yang, Jin Mu

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Carbon Nanotube (CN), Chiral Recognition, Cyclic Voltammetry (CV), Cyclodextrins

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