Volumetric, acoustic, and refractometric properties of (thiophene + hexane/cyclohexane) solutions in the presence of some imidazolium based ionic liquids at T = 298.15 K

Shekaari, Hemayat; Zafarani-Moattar, Mohammed Taghi; Behrooz, Nasrin Jabbarvand

doi:10.1016/j.jct.2015.03.004

Cited by 17 publications

(2 citation statements)

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“…Many industrial applications require a mixture of ILs with water or organic solvents. The physical properties of ILs such as their viscosity, conductivity, and polarity are strongly affected by the presence of molecular liquids, − and mixtures of ILs and organic solvents have been shown to display very promising performances in different fields such as lithium-ion battery technology and extraction of sulfur aromatic compounds from fuels. , Therefore, the knowledge of the behavior of ILs in binary liquid mixtures is important both from fundamental and applied aspects. Several investigations are present in the literature aiming at providing a better characterization of binary mixtures of ILs and organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Structural Properties and Aggregation Behavior of 1-Hexyl-3-methylimidazolium Iodide in Aqueous Solutions

et al. 2015

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The structural properties of 1-hexyl-3-methylimidazolium iodide ([C6mim]I)/water mixtures with molar ratios ranging from 1:1 to 1:200 have been investigated using molecular dynamics (MD) simulations with extended X-ray absorption fine structure (EXAFS) experimental data. The presence of a complex network of interactions among cations, anions, and water molecules has been highlighted from the MD simulations, even if water molecules have been found to interact preferentially with the I(-) anion. The EXAFS results show that, also for the 1:1 [C6mim]I/water mixture, the water molecules are placed next to the I(-) anion, and the I(-) hydration shell becomes more and more crowded with increasing water content. Tight ion pairs have been detected in the [C6mim]I/water mixtures with molar ratios from 1:1 to 1:12, while no ionic pairs were found in the most diluted solutions. The aggregation behavior has been determined from MD simulations with the aid of S(q) functions. For the most concentrated IL/water mixtures with molar ratios between 1:1 and 1:12 the existence of long-range structural correlations has been evidenced, even if the apolar chains are not completely segregated as expected for micelle-like structures. Conversely, for the 1:200 mixture, that is above the experimental critical aggregation concentration value, the alkyl chains are completely separated from each other.

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Section: Introductionmentioning

confidence: 99%

Structural Properties and Aggregation Behavior of 1-Hexyl-3-methylimidazolium Iodide in Aqueous Solutions

et al. 2015

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“…The molar refraction of all studied binary mixtures shows negative deviation for the whole composition range except GVL+2-EE, which shows a sigmoidal behavior in the GVL-rich region, as depicted in Figure . This may be attributed to the small size difference between the GVL and 2-EE molecule, which causes fewer electron perturbations (almost positive at the higher concentration of GVL) in their mixtures as compared to other studied systems having large size differences. − Unlike the refractive index, which is temperature dependent, the molar refraction for a material is nearly independent of the temperature …”

Section: Resultsmentioning

confidence: 97%

Volumetric, Optical, and Spectroscopic Study of Molecular Interactions for Binary Liquid Mixtures of Gamma-Valerolactone with 2-Alkoxyethanols

Kataria

Rani

2022

J. Chem. Eng. Data

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Physical parameters such as densities, ρ, and refractive indices, n D , of pure gamma-valerolactone/2-alkoxyethanols and their binaries have been determined over the whole composition range at different temperatures (298.15, 303.15, 308.15, and 313.15 K) and pressure = 0.1 MPa. From the experimental results, excess properties such as excess molar volumes, V m E , deviations in refractive indices, Δ ϕ n D , and deviations in molar refractions, Δ ϕ R M , have been calculated. The predicted data were fitted to the Redlich−Kister-type polynomial equation to derive the binary interaction parameters and recognize standard deviations between experimental and calculated values of the liquid solutions. Furthermore, the partial molar volumes, V m,1 , V m,2 , and excess partial molar volumes, V m,1 E , V m,2 E , were also computed. The Prigogine−Flory−Patterson theory and Graph theory were employed to correlate experimental V m E values. The departure of real mixtures from ideal behavior was interpreted in terms of strength and nature of molecular interactions. Furthermore, Fourier-transform infrared spectroscopy studies of the investigated solution along with pure components were also reported to obtain a better insight into intermolecular interactions between unlike molecules. In our study, positive values of V m E and negative values of Δ ϕ n D were observed, which suggests weak dispersion forces between dissimilar molecules.

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Dimerization Constants from Acoustic Measurements: Solutions of Benzene, Cyclohexylamine and Aniline in Cyclohexane

Burakowski

Gliński

2017

J Solution Chem

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A model assuming that the formation of dimers determines the acoustic properties of liquid mixtures, in the inert solvent cyclohexane, was applied to describe the observed dependences of sound speed on composition. The dimerization constants were estimated. The results allow one to propose that the solutes tend to form associates larger than dimers in concentrated solutions, while in dilute systems solute–solvent interactions play an important role.Electronic supplementary materialThe online version of this article (doi:10.1007/s10953-017-0656-1) contains supplementary material, which is available to authorized users.

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Volumetric, acoustic, and refractometric properties of (thiophene + hexane/cyclohexane) solutions in the presence of some imidazolium based ionic liquids at T = 298.15 K

Cited by 17 publications

References 61 publications

Structural Properties and Aggregation Behavior of 1-Hexyl-3-methylimidazolium Iodide in Aqueous Solutions

Structural Properties and Aggregation Behavior of 1-Hexyl-3-methylimidazolium Iodide in Aqueous Solutions

Volumetric, Optical, and Spectroscopic Study of Molecular Interactions for Binary Liquid Mixtures of Gamma-Valerolactone with 2-Alkoxyethanols

Dimerization Constants from Acoustic Measurements: Solutions of Benzene, Cyclohexylamine and Aniline in Cyclohexane

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