A lipophilic ionic liquid based on formamidinium cations and TFSI: the electric response and the effect of CO2 on conductivity mechanism

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  1. Available on September 5, 2018
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DOIResolve DOI: http://doi.org/10.1039/C7CP02304A
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TypeArticle
Journal titlePhysical Chemistry Chemical Physics
ISSN1463-9076
1463-9084
AbstractThe work describes the preparation of the new lipophilic ionic liquid tetraoctyl-formamidinium bis(trifluoromethanesulfonyl) imide (TOFATFSI), which is miscible with lower alkanes. In particular, this manuscript focuses on the electric behaviour of TOFATFSI in the particularly challenging highly apolar environment of supercritical CO2. The conductivity and relaxation phenomena are revealed through the analysis of the broadband electric spectra with particular emphasis on the effect of temperature and CO2 uptake on the IL conductivity. It is found that temperature boosts the conductivity via an increase in the charge carrier mobility. Also, CO2 absorption affects both the conductivity and the permittivity of the material due to the presence of CO2-IL interactions that modulate the nanostructure and the size of the TOFATFSI aggregates, which increases both the mobility and the density of the charge carriers.
Publication date
PublisherRoyal Society of Chemistry
LanguageEnglish
AffiliationNational Research Council Canada; Energy, Mining and Environment
Peer reviewedYes
NPARC number23002232
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Record identifierd378529f-5ea6-4e5a-aee7-9a0ff107bb11
Record created2017-09-12
Record modified2017-09-12
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