Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid

Rees, Matthew; Wright, Andrew G.; Holdcroft, Steven; Bertoncello, Paolo

doi:10.3390/s20020443

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Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid

Matthew Rees

, Andrew G. Wright, Steven Holdcroft, Paolo Bertoncello

Sensors, Volume: 20, Issue: 2, Start page: 443

Swansea University Authors: Matthew Rees , Paolo Bertoncello

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DOI (Published version): 10.3390/s20020443

Abstract

We describe the voltammetric behavior of an anion-exchange membrane, hexamethyl-p-terphenyl poly(benzimidazolium) (HMT-PMBI). The anion-exchange properties of HMT-PMBI chemically modified electrodes were investigated using K4Fe(CN)6 and K2IrCl6 as redox probes. The permselectivity properties of HMT-...

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Published in:	Sensors
ISSN:	1424-8220
Published:	MDPI AG 2020
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URI:	https://cronfa.swan.ac.uk/Record/cronfa53248
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spelling	2020-10-27T13:32:55.5814268 v2 53248 2020-01-14 Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid e0697e34d0dadcc6c80668649cb4e8eb 0000-0001-5607-1973 Matthew Rees Matthew Rees true false ad352842aa5fe9c1947bd24ff61816c8 0000-0002-6557-7885 Paolo Bertoncello Paolo Bertoncello true false 2020-01-14 FIC We describe the voltammetric behavior of an anion-exchange membrane, hexamethyl-p-terphenyl poly(benzimidazolium) (HMT-PMBI). The anion-exchange properties of HMT-PMBI chemically modified electrodes were investigated using K4Fe(CN)6 and K2IrCl6 as redox probes. The permselectivity properties of HMT-PMBI chemically modified electrodes were ascertained using tris(2-2’)bipyridyl-ruthenium(II) chloride Ru(bpy)32+. Cyclic voltammetry and chronoamperometry were utilized to extract parameters such as the concentration of the redox mediators inside the films and the apparent diffusion coefficients. We found the concentration of K4Fe(CN)6 and K2IrCl6 redox species within HMT-PMBI-coated films to be on the order of 0.04–0.1 mol·dm−3, and values of Dapp ca. 10−10–10−9 cm2·s−1. To evaluate the possibility of using such a polymer coating in electroanalysis, HMT-PMBI-modified electrodes were utilized for the voltammetric detection of uric acid in artificial urine, Surine® and ascorbic acid in Vitamin C samples. The results showed that HMT-PMBI-coated electrodes can detect uric acid in Surine® with a limit of detection (LoD) of 7.7 µM, sensitivity of 0.14 µA·µM−1·cm−2, and linear range between 5 μM and 200 μM, whereas for Vitamin C tablets, the LoD is 41.4 µM, the sensitivity is 0.08 µA·µM−1·cm−2, and the linear range is between 25 μM and 450 μM. Journal Article Sensors 20 2 443 MDPI AG 1424-8220 chemically modified electrodes; voltammetry; sensors; uric acid; ascorbic acid; hexamethyl-p-terphenyl poly(benzimidazolium), anion exchange polymer 13 1 2020 2020-01-13 10.3390/s20020443 COLLEGE NANME Income COLLEGE CODE FIC Swansea University 2020-10-27T13:32:55.5814268 2020-01-14T08:44:18.5657424 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Matthew Rees 0000-0001-5607-1973 1 Andrew G. Wright 2 Steven Holdcroft 3 Paolo Bertoncello 0000-0002-6557-7885 4 53248__16284__7be82696b44f4236baa22c918c23061b.pdf rees2020.pdf 2020-01-14T08:48:05.3041740 Output 1689765 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution License (CC-BY). true eng http://creativecommons.org/licenses/by/4.0/
title	Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid
spellingShingle	Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid Matthew Rees Paolo Bertoncello
title_short	Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid
title_full	Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid
title_fullStr	Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid
title_full_unstemmed	Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid
title_sort	Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid
author_id_str_mv	e0697e34d0dadcc6c80668649cb4e8eb ad352842aa5fe9c1947bd24ff61816c8
author_id_fullname_str_mv	e0697e34d0dadcc6c80668649cb4e8eb_*_Matthew Rees ad352842aa5fe9c1947bd24ff61816c8_*_Paolo Bertoncello
author	Matthew Rees Paolo Bertoncello
author2	Matthew Rees Andrew G. Wright Steven Holdcroft Paolo Bertoncello
format	Journal article
container_title	Sensors
container_volume	20
container_issue	2
container_start_page	443
publishDate	2020
institution	Swansea University
issn	1424-8220
doi_str_mv	10.3390/s20020443
publisher	MDPI AG
college_str	Faculty of Science and Engineering
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hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
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description	We describe the voltammetric behavior of an anion-exchange membrane, hexamethyl-p-terphenyl poly(benzimidazolium) (HMT-PMBI). The anion-exchange properties of HMT-PMBI chemically modified electrodes were investigated using K4Fe(CN)6 and K2IrCl6 as redox probes. The permselectivity properties of HMT-PMBI chemically modified electrodes were ascertained using tris(2-2’)bipyridyl-ruthenium(II) chloride Ru(bpy)32+. Cyclic voltammetry and chronoamperometry were utilized to extract parameters such as the concentration of the redox mediators inside the films and the apparent diffusion coefficients. We found the concentration of K4Fe(CN)6 and K2IrCl6 redox species within HMT-PMBI-coated films to be on the order of 0.04–0.1 mol·dm−3, and values of Dapp ca. 10−10–10−9 cm2·s−1. To evaluate the possibility of using such a polymer coating in electroanalysis, HMT-PMBI-modified electrodes were utilized for the voltammetric detection of uric acid in artificial urine, Surine® and ascorbic acid in Vitamin C samples. The results showed that HMT-PMBI-coated electrodes can detect uric acid in Surine® with a limit of detection (LoD) of 7.7 µM, sensitivity of 0.14 µA·µM−1·cm−2, and linear range between 5 μM and 200 μM, whereas for Vitamin C tablets, the LoD is 41.4 µM, the sensitivity is 0.08 µA·µM−1·cm−2, and the linear range is between 25 μM and 450 μM.
published_date	2020-01-13T04:06:06Z
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score	11.016235

Voltammetry at Hexamethyl-P-Terphenyl Poly(Benzimidazolium) (HMT-PMBI)-Coated Glassy Carbon Electrodes: Charge Transport Properties and Detection of Uric and Ascorbic Acid

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