Naslov
Volumetric properties, conductivity and computation analysis of selected imidazolium chloride ionic liquids in ethylene glycol

Autori
Tomaš, Renato ; Kinart, Zdzislaw ; Tot, Aleksandar ; Papović, Snežana ; Borović, Teona, Teodora ; Vraneš, Milan

Izvornik
Journal of molecular liquids (0167-7322) 345 (2022); 118178, 14

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Imidazolium chloride ionic liquids ; Ethylene glycol ; Density ; Conductivity ; Molecular dynamic simulations

Sažetak
In this paper, the influence of the side chain length of five ionic liquids (ILs): 1- methylimidazolium chloride ([C0mim][Cl]), 1, 3- dimethylimidazolium chloride ([C1mim][Cl]), 1- ethyl-3-methylimidazolium chloride ([C2mim][Cl]), 1-butyl-3-methylimidazolium chloride ([C4mim][Cl]) and 1-hexyl-3-methylimidazolium chloride ([C6mim] [Cl]) on the interactions with ethylene glycol (EG) was studied. Based on the measurement of density and electrical conductivity of the ionic liquid + EG mixture in the temperature range (278.15 - 313.15) K, the values of apparent molar volume, standard partial molar volumes, apparent molar volume at infinite dilution, Masson’s interaction coefficient, thermal expansion coefficient, limiting apparent molar expansibilities, Heppler’s coefficient, ion association constants, thermodynamic parameters of ion-pair formation as well as diffusion coefficient was calculated. Experimental results were supported by molecular dynamic simulations. With the increase of the side chain length, from C0mim+ to C6mim+ cation, ion-dipole interactions on the solvation process decrease, and the influence of solvophobic solvation increases. Ionic liquids [C0mim][Cl] and [C1mim][Cl] show structure-breaker properties, [C4mim][Cl] and [C6mim][Cl] structure-making properties in EG solutions, while [C2mim][Cl] is borderline. The values of ion association constants in EG are higher than in water. The ion association process is spontaneous for all ionic liquids and entropy- driven.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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