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Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications

Thomas R. Jones, Sandra Hernandez-Aldave, Robert B. Kaspar, Michael P. Letterio, Yushan Yan, Paolo Bertoncello Orcid Logo

Electrochimica Acta, Volume: 311, Pages: 160 - 169

Swansea University Author: Paolo Bertoncello Orcid Logo

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DOI (Published version): 10.1016/j.electacta.2019.04.089

Abstract

We report for the first time the redox properties of an anion-exchange ionomer membrane, tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl). TPQPCl was solubilized in ethanol/water solutions and films of TPQPCl at different concentrations were drop casted on g...

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Published in: Electrochimica Acta
ISSN: 00134686
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa50057
first_indexed 2019-04-23T14:33:40Z
last_indexed 2023-02-22T03:57:43Z
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spelling 2023-02-21T16:11:56.0159710 v2 50057 2019-04-23 Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications ad352842aa5fe9c1947bd24ff61816c8 0000-0002-6557-7885 Paolo Bertoncello Paolo Bertoncello true false 2019-04-23 EAAS We report for the first time the redox properties of an anion-exchange ionomer membrane, tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl). TPQPCl was solubilized in ethanol/water solutions and films of TPQPCl at different concentrations were drop casted on glassy carbon electrodes. The thickness of TPQPCl films in dry conditions was evaluated using profilometer. The anion-exchange properties and charge transport properties of TPQPCl coated electrodes were investigated using K4Fe(CN)6 as anionic redox probe. The permselectivity properties of TPQPCl coated electrodes were assessed using hexaammine ruthenium(II) chloride. Cyclic voltammetry performed at low scan rate was utilized to determine the concentration of the redox mediator inside the films, with the apparent diffusion coefficient values of different TPQPCl coating estimated using both the Randles-Sevcik equation and the Anson's method. We found the concentration of the ferro/ferricyanide couple redox within the TPQPCl films in the order of 10−2-10−1 mol dm−3, with values of Dapp in the order of 10−9 cm2 s−1. TPQPCl drop casted films evidenced good preconcentration capabilities towards incorporation of anions. To ascertain the suitability of the ionomer coated films towards the electroanalytical detection of anions, TPQPCl coated electrodes were utilized for the voltammetric detection of nitrites in tap and river waters. The results showed that TPQPCl coated electrodes are suitable to quantify nitrites in fresh waters with a limit of detection, LoD, of 1.07 μM, sensitivity as 0.267 μA μM−1 cm−2 and linear range between 1 μM and 500 μM. Journal Article Electrochimica Acta 311 160 169 00134686 10 7 2019 2019-07-10 10.1016/j.electacta.2019.04.089 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University RCUK, EP/L013797/1 EPSRC: EP/L013797/1, "Nanostructured Conductive Anion Exchange Composite Thin Films for Electrocatalytic Applications" 2023-02-21T16:11:56.0159710 2019-04-23T10:30:55.9362419 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Thomas R. Jones 1 Sandra Hernandez-Aldave 2 Robert B. Kaspar 3 Michael P. Letterio 4 Yushan Yan 5 Paolo Bertoncello 0000-0002-6557-7885 6 0050057-09052019112312.pdf jones2019(4).pdf 2019-05-09T11:23:12.5270000 Output 1481489 application/pdf Version of Record true 2019-05-09T00:00:00.0000000 Released under the terms of a Creative Commons Attribution License (CC-BY). true eng
title Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications
spellingShingle Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications
Paolo Bertoncello
title_short Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications
title_full Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications
title_fullStr Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications
title_full_unstemmed Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications
title_sort Tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl) ionomer chemically modified electrodes: An electroanalytical study towards sensing applications
author_id_str_mv ad352842aa5fe9c1947bd24ff61816c8
author_id_fullname_str_mv ad352842aa5fe9c1947bd24ff61816c8_***_Paolo Bertoncello
author Paolo Bertoncello
author2 Thomas R. Jones
Sandra Hernandez-Aldave
Robert B. Kaspar
Michael P. Letterio
Yushan Yan
Paolo Bertoncello
format Journal article
container_title Electrochimica Acta
container_volume 311
container_start_page 160
publishDate 2019
institution Swansea University
issn 00134686
doi_str_mv 10.1016/j.electacta.2019.04.089
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
document_store_str 1
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description We report for the first time the redox properties of an anion-exchange ionomer membrane, tris(2,4,6-trimethoxyphenyl)polysulfone-methylene quaternary phosphonium chloride (TPQPCl). TPQPCl was solubilized in ethanol/water solutions and films of TPQPCl at different concentrations were drop casted on glassy carbon electrodes. The thickness of TPQPCl films in dry conditions was evaluated using profilometer. The anion-exchange properties and charge transport properties of TPQPCl coated electrodes were investigated using K4Fe(CN)6 as anionic redox probe. The permselectivity properties of TPQPCl coated electrodes were assessed using hexaammine ruthenium(II) chloride. Cyclic voltammetry performed at low scan rate was utilized to determine the concentration of the redox mediator inside the films, with the apparent diffusion coefficient values of different TPQPCl coating estimated using both the Randles-Sevcik equation and the Anson's method. We found the concentration of the ferro/ferricyanide couple redox within the TPQPCl films in the order of 10−2-10−1 mol dm−3, with values of Dapp in the order of 10−9 cm2 s−1. TPQPCl drop casted films evidenced good preconcentration capabilities towards incorporation of anions. To ascertain the suitability of the ionomer coated films towards the electroanalytical detection of anions, TPQPCl coated electrodes were utilized for the voltammetric detection of nitrites in tap and river waters. The results showed that TPQPCl coated electrodes are suitable to quantify nitrites in fresh waters with a limit of detection, LoD, of 1.07 μM, sensitivity as 0.267 μA μM−1 cm−2 and linear range between 1 μM and 500 μM.
published_date 2019-07-10T07:32:34Z
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score 11.054942

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