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Fullerene-doped poly(ionic liquids) as small molecular gas sensors─control of intermolecular interactions
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SYSNO ASEP 0604404 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fullerene-doped poly(ionic liquids) as small molecular gas sensors─control of intermolecular interactions Author(s) Otta, Jaroslav (FZU-D) ORCID
Mikuláštík, J. (CZ)
Šípka, R. (CZ)
Stein, M. (DE)
Kühne, Irina A. (FZU-D) ORCID
Vrňata, M. (CZ)
Vlček, Jan (FZU-D) RID, ORCIDNumber of authors 7 Source Title ACS Omega. - : American Chemical Society - ISSN 2470-1343
Roč. 10, č. 1 (2025), s. 1364-1372Number of pages 9 s. Language eng - English Country US - United States Keywords polymer ionic liquids ; sensor ; fullerene Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects EH22_008/0004596 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA23-05878S GA ČR - Czech Science Foundation (CSF) EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 001382255800001 EID SCOPUS 85212791699 DOI https://doi.org/10.1021/acsomega.4c08941 Annotation Here, we investigate the interactions between five representative gaseous analytes and two poly(ionic liquids) (PILs) based on the sulfopropyl acrylate polyanion in combination with the alkylphosphonium cations, P4,4,4,4 and P4,4,4,8, and their nanocomposites with fullerenes (C60, C70) to reveal the potential of PILs as sensitive layers for gas sensors. The gaseous analytes were chosen based on their molecular size (all of them containing two carbon atoms) and variation of functional groups: alcohol (ethanol), nitrile (acetonitrile), aldehyde (acetaldehyde), halogenated alkane (bromoethane), and carboxylic acid (acetic acid). The six variations of PILs-P4,4,4,4SPA (1), P4,4,4,4SPA + C60 (1 + C60), P4,4,4,4SPA + C70 (1 + C70), and P4,4,4,8SPA (2), P4,4,4,8SPA + C60 (2 + C60), P4,4,4,8SPA + C70 (2 + C70)-were characterized by UV−vis and Raman spectroscopy, and their interactions with each gaseous analyte were studied using electrochemical impedance spectroscopy. Exposure of all PIL samples to acetaldehyde, bromoethane, and ethanol leads to a decrease in the diffusion coefficient, while exposure to acetic acid reveals an increase. Fullerene-doping significantly enhances the response to the analyte. Semiempirical quantum mechanical xTB-GFN2 calculations revealed that hydrogen bonding and proton transfer events play an important role during the detection process. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2026 Electronic address https://hdl.handle.net/11104/0361803
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