Molecules 2014, 19(5), 5952-5964; doi:10.3390/molecules19055952
Article

Guest-Host Complex Formed between Ascorbic Acid and β-Cyclodextrin Immobilized on the Surface of an Electrode

1email, 2,* email, 2, 2email and 3email
Received: 25 October 2013; in revised form: 28 April 2014 / Accepted: 29 April 2014 / Published: 9 May 2014
(This article belongs to the Section Organic Synthesis)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: This work deals with the formation of supramolecular complexes between ascorbic acid (AA), the guest, and β-cyclodextrin (β-CD), the host, that was first potentiodynamically immobilized on the surface of a carbon paste electrode (CPE) throughout the formation of a β-CD-based conducting polymer (poly-β-CD). With the bare CPE and the β-CD-modified CPE, an electrochemical study was performed to understand the effect of such surface modification on the electrochemical response of the AA. From this study it was shown that on the modified-CPE, the AA was surface-immobilized through formation of an inclusion complex with β-CD, which provoked the adsorption of AA in such a way that this stage became the limiting step for the electrochemical oxidation of AA. Moreover, from the analysis of the experimental voltammetric plots recorded during AA oxidation on the CPE/poly-β-CD electrode surfaces, the Gibbs’ standard free energy of the inclusion complex formed by the oxidation product of AA and β-CD has been determined for the first time, ∆G0inclus = −36.4 kJ/mol.
Keywords: ascorbic acid; β-cyclodextrin; polymerization; surface inclusion complex
PDF Full-text Download PDF Full-Text [1489 KB, Updated Version, uploaded 18 June 2014 20:53 CEST]
The original version is still available [1451 KB, uploaded 18 June 2014 20:53 CEST]

Export to BibTeX |
EndNote


MDPI and ACS Style

Ramírez-Silva, M.T.; Palomar-Pardavé, M.; Corona-Avendaño, S.; Romero-Romo, M.; Alarcón-Angeles, G. Guest-Host Complex Formed between Ascorbic Acid and β-Cyclodextrin Immobilized on the Surface of an Electrode. Molecules 2014, 19, 5952-5964.

AMA Style

Ramírez-Silva MT, Palomar-Pardavé M, Corona-Avendaño S, Romero-Romo M, Alarcón-Angeles G. Guest-Host Complex Formed between Ascorbic Acid and β-Cyclodextrin Immobilized on the Surface of an Electrode. Molecules. 2014; 19(5):5952-5964.

Chicago/Turabian Style

Ramírez-Silva, María T.; Palomar-Pardavé, Manuel; Corona-Avendaño, Silvia; Romero-Romo, Mario; Alarcón-Angeles, Georgina. 2014. "Guest-Host Complex Formed between Ascorbic Acid and β-Cyclodextrin Immobilized on the Surface of an Electrode." Molecules 19, no. 5: 5952-5964.

Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert