How perfluoroalkyl substances modify fluorinated self-assembled monolayer architectures: An electrochemical and computational study.

Autor: Moro G; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy; A-Sense Research Group, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; NanoLab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium. Electronic address: giulia.moro@unive.it., Dongmo Foumthuim CJ; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy., Spinaci M; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy., Martini E; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy., Cimino D; Department of Environmental Sciences, Informatic and Statistics, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy., Balliana E; Department of Environmental Sciences, Informatic and Statistics, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy., Lieberzeit P; Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria., Romano F; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy., Giacometti A; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy; European Centre for Living Technology (ECLT) Ca' Bottacin, 3911 Dorsoduro Calle Crosera, 30123, Venice, Italy., Campos R; A-Sense Research Group, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; NanoLab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium., De Wael K; A-Sense Research Group, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; NanoLab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium., Moretto LM; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy.
Jazyk: angličtina
Zdroj: Analytica chimica acta [Anal Chim Acta] 2022 Apr 29; Vol. 1204, pp. 339740. Date of Electronic Publication: 2022 Mar 17.
DOI: 10.1016/j.aca.2022.339740
Abstrakt: There is an urgent need for sensing strategies to screen perfluoroalkyl substances (PFAS) in aqueous matrices. These strategies must be applicable in large-scale monitoring plans to face the ubiquitous use of PFAS, their wide global spread, and their fast evolution towards short-chain, branched molecules. To this aim, the changes in fluorinated self-assembled monolayers (SAM) with different architectures (pinholes/defects-free and with randomized pinholes/defects) were studied upon exposure to both long and short-chain PFAS. The applicability of fluorinated SAM in PFAS sensing was evaluated. Changes in the SAM structures were characterised combining electrochemical impedance spectroscopy and voltammetric techniques. The experimental data interpretation was supported by molecular dynamics simulations to gain a more in-depth understanding of the interaction mechanisms involved. Pinhole/defect-free fluorinated SAM were found to be applicable to long-chain PFAS screening within switch-on sensing strategy, while a switch-off sensing strategy was reported for screening of both short/long-chain PFAS. These strategies confirmed the possibility to play on fluorophilic interactions when designing PFAS screening methods.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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