Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 22, Pages 10548-10557Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp00259h
Keywords
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Funding
- EPSRC
- European Social Fund
- KU Leuven [IDO/05/005, OT/11/064, IOF-KP CO2IL]
- Research Foundation - Flanders (FWO) [G.0230.07]
- Research Community Ionic Liquids
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The electrical conductivity of a series of pyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquids, functionalized with a nitrile (cyano) group at the end of an alkyl chain attached to the cation, was studied in the temperature range between 173 K and 393 K. The glass formation of the ionic liquids is influenced by the length of the alkyl spacer separating the nitrile function from the pyrrolidinium ring. The electrical conductivity and the viscosity do not show a monotonic dependence on the alkyl spacer length, but rather an odd-even effect. An explanation for this behavior is given, including the potential energy landscape picture for the glass transition.
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