2015/12/11 by Vitaly V. Chaban, Chaban, Vitaly V.
Chemical Engineering · Chemistry · Materials Science · #Conducting polymers and applications #Electrochemical Analysis and Applications #FOS: Physical sciences #Ionic liquids properties and applications #Soft Condensed Matter (cond-mat.soft)
paper · pdf · doi:10.48550/arxiv.1512.03569
openalex publication_date 2015/12/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The work reports transport and structure properties of the three pyridinium-based ionic liquids (RTILs) - N-butylpyridinium hexafluorophosphate [BPY][PF6], N-butylpyridinium trifluorosulfonate [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.