Excess molar volumes and viscosity behaviour of binary mixtures of aniline/or N, N-dimethylaniline with imidazolium ionic liquids having triflate or bistriflamide anion. (June 2017)

• Record Type: Journal Article
• Authors: Soldatović, Danijela; Vuksanović, Jelena; Radović, Ivona; Višak, Zoran; Kijevčanin, Mirjana
• Is Part Of: Journal of chemical thermodynamics. Volume 109(2017)
• Page Start: 137
• Page End: 154
• Publication Date: 2017-06
• Subjects: Density -- Viscosity -- Excess molar Gibbs free energy -- Aniline -- N, N-dimethylaniline -- Ionic liquids; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2017.02.007
• Languages: English
• ISSNs: 0021-9614

Abstract

Highlights: Measurements of density and viscosity of aniline/ N, N -dimethylaniline+ILs mixtures. Detailed thermodynamic interpretation of molecular interactions is performed. Strong attractive interactions are present in three completely miscible mixtures. Aniline + [bmim][OTf] exhibits partial miscibility. Abstract: In this study, densities and viscosities of four binary systems {aniline/ N, N -dimethylaniline + 1-butyl-3-methylimidazolium triflate ([bmim][OTf])} and {aniline/ N, N -dimethylaniline + 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([bmim][NTf2 ])} were measured at atmospheric pressure and within the temperature range T = (288.15 to 333.15) K. Excess molar volumes V E, viscosity deviations Δ η and excess molar Gibbs energies of activation of viscous flow ∆G ∗E were calculated and the results were fitted to a Redlich-Kister polynomial equation. Also, enthalpic and entropic parts of the ∆G ∗E function were determined, at the same composition, for three studied systems that exhibit complete miscibility, since {aniline + [bmim][OTf]} is a partially miscible system. Considering the calculated thermodynamic properties, molecular interactions in the investigated binary systems were analysed and are discussed.