Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)

Li, Zhongkai; Malpass-Evans, Richard; McKeown, Neil B.; Carta, Mariolino; Mathwig, Klaus; Lowe, John P.; Marken, Frank

doi:10.1016/j.elecom.2021.107110

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Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)

Zhongkai Li

, Richard Malpass-Evans, Neil B. McKeown, Mariolino Carta

, Klaus Mathwig

, John P. Lowe

, Frank Marken

Electrochemistry Communications, Volume: 130, Start page: 107110

Swansea University Author: Mariolino Carta

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DOI (Published version): 10.1016/j.elecom.2021.107110

Abstract

Tertiary-amine-based Polymers of Intrinsic Microporosity (PIMs) provide a class of highly porous molecularly rigid materials for the electrochemical transport of both ionic and neutral species. Here, the transport of water molecules together with chloride anions (i.e. the electroosmotic drag coeffic...

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Published in:	Electrochemistry Communications
ISSN:	1388-2481
Published:	Elsevier BV 2021
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa60395
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spelling	2022-08-03T15:38:26.3301656 v2 60395 2022-07-07 Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB) 56aebf2bba457f395149bbecbfa6d3eb 0000-0003-0718-6971 Mariolino Carta Mariolino Carta true false 2022-07-07 CHEM Tertiary-amine-based Polymers of Intrinsic Microporosity (PIMs) provide a class of highly porous molecularly rigid materials for the electrochemical transport of both ionic and neutral species. Here, the transport of water molecules together with chloride anions (i.e. the electroosmotic drag coefficient) is studied for the intrinsically microporous polyamine PIM-EA-TB immersed in aqueous 0.01 M NaCl (i) when protonated for pH < 4 or (ii) when not protonated for pH > 4. Preliminary data suggest that in both cases a high electroosmotic drag coefficient is observed based on direct H2O transport into a D2O-filled compartment (quantified by 1H-NMR). For PIM-EA-TB there is a strong pH dependence with a higher electroosmotic drag coefficient in less acidic solutions (going from approx. 400 H2O per anion at pH 3 to approx. 4000 H2O per anion at pH 7), although the underlying absolute rate of water transport at a fixed voltage of −1 V appears to be essentially pH independent. Water transport through the PIM-EA-TB microchannels is rationalised based on the relative populations of chloride anions and of water in the micropores (essentially a ‘piston’ mechanism). Journal Article Electrochemistry Communications 130 107110 Elsevier BV 1388-2481 Microporosity, Voltammetry, Electroosmosis, Desalination, Solar water harvesting 1 9 2021 2021-09-01 10.1016/j.elecom.2021.107110 COLLEGE NANME Chemistry COLLEGE CODE CHEM Swansea University K.M. acknowledges financial support from Provincie Gelderland. F.M. is grateful for initial financial support by the EPSRC (EP/K004956/1). 2022-08-03T15:38:26.3301656 2022-07-07T14:02:57.1486103 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemistry Zhongkai Li 0000-0002-1418-9727 1 Richard Malpass-Evans 2 Neil B. McKeown 3 Mariolino Carta 0000-0003-0718-6971 4 Klaus Mathwig 0000-0002-8532-8173 5 John P. Lowe 0000-0003-4820-251x 6 Frank Marken 0000-0003-3177-4562 7 60395__24481__df5ed21c58de45428f6d8ddadbfbea4c.pdf 60395.VOR.pdf 2022-07-07T14:10:46.6750792 Output 5028065 application/pdf Version of Record true Distributed under the terms of a Creative Commons CC-BY Attribution 4.0 Licence. true eng https://creativecommons.org/licenses/by/4.0/
title	Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)
spellingShingle	Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB) Mariolino Carta
title_short	Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)
title_full	Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)
title_fullStr	Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)
title_full_unstemmed	Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)
title_sort	Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)
author_id_str_mv	56aebf2bba457f395149bbecbfa6d3eb
author_id_fullname_str_mv	56aebf2bba457f395149bbecbfa6d3eb_***_Mariolino Carta
author	Mariolino Carta
author2	Zhongkai Li Richard Malpass-Evans Neil B. McKeown Mariolino Carta Klaus Mathwig John P. Lowe Frank Marken
format	Journal article
container_title	Electrochemistry Communications
container_volume	130
container_start_page	107110
publishDate	2021
institution	Swansea University
issn	1388-2481
doi_str_mv	10.1016/j.elecom.2021.107110
publisher	Elsevier BV
college_str	Faculty of Science and Engineering
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department_str	School of Engineering and Applied Sciences - Chemistry{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemistry
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description	Tertiary-amine-based Polymers of Intrinsic Microporosity (PIMs) provide a class of highly porous molecularly rigid materials for the electrochemical transport of both ionic and neutral species. Here, the transport of water molecules together with chloride anions (i.e. the electroosmotic drag coefficient) is studied for the intrinsically microporous polyamine PIM-EA-TB immersed in aqueous 0.01 M NaCl (i) when protonated for pH < 4 or (ii) when not protonated for pH > 4. Preliminary data suggest that in both cases a high electroosmotic drag coefficient is observed based on direct H2O transport into a D2O-filled compartment (quantified by 1H-NMR). For PIM-EA-TB there is a strong pH dependence with a higher electroosmotic drag coefficient in less acidic solutions (going from approx. 400 H2O per anion at pH 3 to approx. 4000 H2O per anion at pH 7), although the underlying absolute rate of water transport at a fixed voltage of −1 V appears to be essentially pH independent. Water transport through the PIM-EA-TB microchannels is rationalised based on the relative populations of chloride anions and of water in the micropores (essentially a ‘piston’ mechanism).
published_date	2021-09-01T04:18:28Z
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Effective electroosmotic transport of water in an intrinsically microporous polyamine (PIM-EA-TB)

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