Flexibility is the key to tuning the transport properties of fluorinated imide-based ionic liquids.

Autor:	Philippi F; Department of Chemistry, Molecular Sciences Research Hub, Imperial College London White City Campus London W12 0BZ UK t.welton@imperial.ac.uk., Rauber D; Department of Chemistry, Saarland University Campus B2.2 Saarbrücken Germany., Palumbo O; Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi Piazzale Aldo Moro 5 00185 Rome Italy., Goloviznina K; Laboratoire de Chimie, École Normale Supérieure de Lyon, CNRS 69364 Lyon France., McDaniel J; School of Chemistry and Biochemistry, Georgia Institute of Technology Atlanta Georgia 30332-0400 USA., Pugh D; Department of Chemistry, King's College London 7 Trinity Street London SE1 1DB UK., Suarez S; Department of Physics, Brooklyn College of CUNY Brooklyn New York 11210 USA., Fraenza CC; Department of Physics and Astronomy, Hunter College of CUNY New York 10065 USA., Padua A; Laboratoire de Chimie, École Normale Supérieure de Lyon, CNRS 69364 Lyon France., Kay CWM; Department of Chemistry, Saarland University Campus B2.2 Saarbrücken Germany.; London Centre for Nanotechnology, University College London 17-19 Gordon Street London WC1H 0AH UK., Welton T; Department of Chemistry, Molecular Sciences Research Hub, Imperial College London White City Campus London W12 0BZ UK t.welton@imperial.ac.uk.
Jazyk:	angličtina
Zdroj:	Chemical science [Chem Sci] 2022 Aug 03; Vol. 13 (32), pp. 9176-9190. Date of Electronic Publication: 2022 Aug 03 (Print Publication: 2022).
DOI:	10.1039/d2sc03074h
Abstrakt:	Ionic liquids are becoming increasingly popular for practical applications such as biomass processing and lithium-ion batteries. However, identifying ionic liquids with optimal properties for specific applications by trial and error is extremely inefficient since there are a vast number of potential candidate ions. Here we combine experimental and computational techniques to determine how the interplay of fluorination, flexibility and mass affects the transport properties of ionic liquids with the popular imide anion. We observe that fluorination and flexibility have a large impact on properties such as viscosity, whereas the influence of mass is negligible. Using targeted modifications, we show that conformational flexibility provides a significant contribution to the success of fluorination as a design element. Contrary to conventional wisdom, fluorination by itself is thus not a guarantor for beneficial properties such as low viscosity. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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