Electrochemical and bioelectrocatalytical properties of novel block-copolymers containing interacting ferrocenyl units

Garcia Armada, Maria del Pilar and Losada del Barrio, Jose and Lopez Villanueva, F.J. and Frey, H. and Alonso Garrido, Beatriz and Casado Santana, Carmen M. (2008). Electrochemical and bioelectrocatalytical properties of novel block-copolymers containing interacting ferrocenyl units. In: "59th Annual Meeting of the International Society of Electrochemistry", 07/09/2008-12/09/2008, Sevilla, España.

Description

Title: Electrochemical and bioelectrocatalytical properties of novel block-copolymers containing interacting ferrocenyl units
Author/s:
  • Garcia Armada, Maria del Pilar
  • Losada del Barrio, Jose
  • Lopez Villanueva, F.J.
  • Frey, H.
  • Alonso Garrido, Beatriz
  • Casado Santana, Carmen M.
Item Type: Presentation at Congress or Conference (Article)
Event Title: 59th Annual Meeting of the International Society of Electrochemistry
Event Dates: 07/09/2008-12/09/2008
Event Location: Sevilla, España
Title of Book: CD-ROM Proceedings of 59th Annual Meeting of the International Society of Electrochemistry
Date: 2008
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Química Industrial y del Medio Ambiente
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The electrochemical characterization of three different polystyrene-b-polybutadiene block copolymers functionalized with ferrocenyl units electronically communicated, PSm-PBn(HSiMeFc2)p where m=615, n=53, p=39 (1), m=375, n=92, p=76 (2) and m=455, n=204, p=170 (3), has been carried out both in solution and electrochemically deposited onto platinum electrodes. The bioelectrocatalytical properties of electrodes modified with the polymers in the nicotinamide dinucleotide (NADH) and glucose oxidase (GOx) oxidations have been investigated as a function of the constitution and structure of the polymers. The analytical properties of electrodes modified with these polymers as sensors of NADH and GOx are described. In addition, an amperometric biosensor for glucose, prepared by electrostatic immobilization of glucose oxidase onto a platinum electrode modified with one of the ferrocenyl block copolymers as an example, has been developed. The results confirm that electrodes modified with the examined copolymers act as efficient redox mediators for the electrocatalytic oxidation of both reduced nicotinamide dinucleotide cofactor and glucose oxidase. The reaction with NADH proceeds via formation of a charge-transfer intermediate before yielding the reaction products. This is a novel example of electrodes modified with ferrocene derivatives that can be applied to the determination of NADH without the use of diaphorase. The redox copolymers co-immobilized with glucose-oxidase have been successfully used as amperometric biosensors for glucose determinations. As expected these compounds allow using lower working potentials. The sensitivities and detection limits obtained are comparable or even better than those of other ferrocene-modified polymers mediator electrodes.

More information

Item ID: 3860
DC Identifier: http://oa.upm.es/3860/
OAI Identifier: oai:oa.upm.es:3860
Official URL: http://event08.ise-online.org/site/index.htm
Deposited by: Memoria Investigacion
Deposited on: 27 Jul 2010 11:56
Last Modified: 20 Apr 2016 13:18
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