Interionic Interactions of Aqueous Mixtures of Ionic Liquid 1-Hexyl-3-methylimidazolium Chloride with Phosphate Salts at T = (288.15 to 308.15) K: Volumetric, Acoustic and UV Absorption Studies

Abstract

The interactions of phosphate salts like disodium hydrogen phosphate (Na 2 HPO 4 ) and dipotassium hydrogen phosphate (K 2 HPO 4 ) with 1-hexyl-3-methylimidazolium chloride ([C 6 mim][Cl]) as a function of temperature have been investigated by combination of volumetric and acoustic measurements. Densities, ρ, and speeds of sound, u, for phosphate salts in aqueous solutions of 1-hexyl-3-methylimidazolium chloride have been measured at T = (288. 15, 293.15, 298.15, 303.15, 308.15) K and atmospheric pressure. The apparent molar volume, limiting apparent molar volume and standard partial molar volumes of transfer for phosphate salts from water to aqueous 1-hexyl-3-methylimidazolium chloride solutions have been calculated from density data. Apparent molar isentropic compression, limiting apparent molar isentropic compression and standard partial molar isentropic compression of transfer have been calculated from speeds of sound data. The UV absorption studies have also made in this study. The results have been explained in terms of competing patterns of interactions of cosolvent and the solute.

How Different Electrolytes Can Influence the Aqueous Solution Behavior of 1-Ethyl-3-Methylimidazolium Chloride: A Volumetric, Viscometric, and Infrared Spectroscopy Approach

“…The interactions of some phosphate and citrate salts with 1-hexyl-3-methylimidazolium chloride as a function of temperature have been investigated by a combination of volumetric and acoustic measurements by Kumar and coworkers. The absorption values revealed the existence of interactions between citrate/phosphate salt, IL, and water molecules, which supported results obtained from volumetric and acoustic data (Kumar and Chadha, 2014 , 2015 ).…”

Investigation of Anion Structural Effects on Solute‐Solvent Interactions of Ionic Liquids with DMF by Volumetric, Acoustic, Viscometric Properties and COSMO‐RS Calculations

“…When the temperature and concentration increased linearly, the positive magnitude raised gradually. For the binary system of [Omim][SCN]+DMF, the negative magnitude values increases with increases of concentration of solute and temperature, the negative values of apparent molar isentropic compressibility indicating that the solvent molecules surrounded by solute molecules are less compressibility solvent molecule in bulk, that indicates weak interactions between solute and solvent molecules [11,13] . The variation of κ s,φ against concentration and temperature of all studied ILs are represented as Figure 6 and Figures S13–S14.…”

“…where, k s and k [11,13] The variation of k s,ϕ against concentration and temperature of all studied ILs are represented as Figure 6 and Figures S13-S14. The 3D representation of all figures divided into various regions, among them, violet colour region significance of low magnitude, whereas brown colour corresponds to high magnitude.…”

“…Particularly, Keshapolla et al [4] reported on volumetric, acoustic and viscometric properties of binary mixtures of benzyldimethylammonium based ILs with DMF at various temperatures and composition ranges, the results were analyzed based on the structural effects of component molecules. Kumar et al [11] have investigated the volumetric, acoustic and UV-absorption spectroscopic study of aqueous ternary mixtures of ILs [Hmim] [Cl] with disodium hydrogen phosphate and dipotassium hydrogen phosphate salts at different conditions. The obtained results showed that the positive magnitude of studied properties increased linearly with temperature as well as concentration of IL rose due to the more solvation behavior and more interactions between the component molecules.…”

“…reported on volumetric, acoustic and viscometric properties of binary mixtures of benzyldimethylammonium based ILs with DMF at various temperatures and composition ranges, the results were analyzed based on the structural effects of component molecules. Kumar et al [11] . have investigated the volumetric, acoustic and UV‐absorption spectroscopic study of aqueous ternary mixtures of ILs [Hmim][Cl] with disodium hydrogen phosphate and dipotassium hydrogen phosphate salts at different conditions.…”