Acetone as a polar cosolvent for pyridinium-based ionic liquids

Acetone as a polar cosolvent for pyridinium-based ionic liquids

Author Chaban, Vitaly V. Autor UNIFESP Google Scholar
Abstract This work reports transport and structure properties of the three pyridinium-based ionic liquids (RTILs) - N-butylpyridinium hexafluorophosphate [BPY][PF6], N-butylpyridinium trifluoromethanesulfonate [BPY][TF] and N-butylpyridinium bis(trifluoromethanesulfonyl) imide [BPY][TFSI] - in their mixtures with acetone (ACET). The ionic conductivity maximum occurs at 10 mol% RTIL, irrespective of the anion. The absolute ionic conductivity value of [BPY][TF] is higher than those of other RTILs. This is explained by a weaker cation-anion binding than that in [BPY][PF6] and smaller anion size than that of [BPY][TFSI]. All the investigated RTILs are infinitely miscible with ACET, which boosts their diffusivity and conductivity. A small viscosity of ACET favors a drastic viscosity decay in the RTIL-ACET mixtures. Structure analysis (radial distribution functions, ionic clusters) of the mixtures are in line with their transport properties providing a reliable microscopic interpretation of the observed macroscopic properties. As a molecular co-solvent, ACET constitutes an interesting alternative and competitor to more intensively investigated liquids.
Keywords Molecular-Dynamics
Thermodynamic Properties
Force-Field
Mixtures
Equilibrium
Temperature
Binary
System
Supercapacitors
Electrolytes
Language English
Sponsor CAPES in Brazil
Date 2016
Published in Rsc Advances. Cambridge, v. 6, n. 11, p. 8906-8912, 2016.
ISSN 2046-2069 (Sherpa/Romeo, impact factor)
Publisher Royal soc chemistry
Extent 8906-8912
Origin http://dx.doi.org/10.1039/c5ra19511j
Access rights Closed access
Type Article
Web of Science ID WOS:000369515900045
URI http://repositorio.unifesp.br/handle/11600/49634

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