On the Determination of Partial Molar Volumes, Partial Molar Refractions, Mean Electronic Polarizabilities and Effective Molecular Radii from Dilute Multi-component Data alone using Response Surface Models

Tjahjono, Martin; Garland, Marc

doi:10.1007/s10953-006-9109-y

Cited by 25 publications

(13 citation statements)

References 19 publications

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“…From molar refractions, the polarizability of the solutions is understood. This quantity, an electric field, determines the ability of a molecular orbital to be transformed . In addition, its electron cloud is further distributed with the complexity of the structure of a molecule, leading to increased polarizability of the molecule.…”

Section: Resultsmentioning

confidence: 99%

Thermophysical Properties of Protic Ionic Liquids Monoethanolamine, Diethanolamine, and Triethanolamine Lactate in Water

2021

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Absolute knowledge of applying protic alkanolamine ionic liquids and the comprehension of diverse thermophysical properties of these materials is necessary in different processes. In this regard, the density, speed of sound, viscosity, and refractive index data for aqueous solutions of ionic liquids (ILs), 2-hydroxyethylammonium lactate [2-HEA]La, bis(2-hydroxyethyl)ammonium lactate [2-HDEA]La, and tris(2-hydroxyethyl)ammonium lactate [2-HTEA]La were measured in dilute concentration region of ILs at T = 288.15–318.125 K under 87.1 kPa pressure. The standard partial molar volume and partial molar isentropic compressibility (V φ 0 and Κφ 0) were determined from the parameters of the Redlich–Mayer equation. Also, Pitzer interaction theory was used for the correlation of the experimental values. Temperature dependence of the standard partial molar volume was applied for determining the structure making or breaking behavior of the mentioned ionic liquids in water bulk by using apparent molar isobaric expansions E φ 0 and . The viscosity measurements were used to determine the viscosity B-coefficient. Finally, the solute–solvent interactions were explained with the obtained results. The results suggest that ionic liquid [2-HTEA]La has a stronger interaction with water compared to other ionic liquids.

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Section: Resultsmentioning

confidence: 99%

Thermophysical Properties of Protic Ionic Liquids Monoethanolamine, Diethanolamine, and Triethanolamine Lactate in Water

2021

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“…The diffusion coefficients for API-IL at infinite dilution can be calculated using the Nernst–Haskell equation as follows where D AB 0 is the diffusion coefficient of API-IL (A) in water (B), F is the Faraday’s constant, z + and z – are the charge numbers of the cation and anion, λ 0 + and λ 0 – are the limiting molar conductivities of the cation and anion, respectively. Table presents the calculated D AB 0 value of [HMIm][Sal] in water.…”

Section: Resultsmentioning

confidence: 99%

“…The measured refractive index data n D for (glycine, l -alanine + [HMIm][Sal] + water) with several molalitities of ([HMIm][Sal] + water) are listed in Table S1. The molar refraction R D is computed using the Lorentz–Lorenz equation where x i , M i , and d are the mole fraction, molar mass of components and the density of solutions, respectively. Table reports the calculated R D values of the investigated solutions.…”

Section: Resultsmentioning

confidence: 99%

Thermophysical Properties of 1-Hexyl-3-methylimidazolium Salicylate as an Active Pharmaceutical Ingredient Ionic Liquid (API-IL) in Aqueous Solutions of Glycine and l-Alanine

et al. 2018

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The effect of 1-hexyl-3-methylimidazolium salicylate, [HMIm][Sal] as an ionic liquid form of active pharmaceutical ingredient (API-IL) on the thermodynamic behavior of two simple amino acids, glycine and l-alanine have been investigated. The densities, speeds of sound, viscosities, and refractive indices of the amino acids in the mixtures of ([HMIm][Sal] + water) have been determined at T = 298.15 K. Moreover, the electrical conductivities of the studied API-IL in water and aqueous mixtures of the amino acids have been calculated using the measured specific conductivities. The measured data were utilized to compute the partial molar volume of transfer (Δtra V ϕ 0), partial molar isentropic compressibility of transfer (Δtra κ ϕ 0), viscosity B-coefficient of transfer (Δtra B), ion association constant (K A), and molar refraction (R D) quantities. The increase in the positive values of Δtra V ϕ 0, Δtra κ ϕ 0 and Δtra B with an increase in the API-IL concentration indicates that the ion–polar and polar–polar interactions between the API-IL and amino acid are dominant. Besides, the decrease in the K A values of [HMIm][Sal] with the addition of amino acid concentration suggests that the formation of ion pair does not proceed spontaneously due to the ions solvated by the zwitterions of amino acid.

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“…The ionic limiting molar conductivity of the  0  in water for [OMIm] + is taken from literature. 47 The limiting molar conductivity of the  0  (see in Table 5) Table 5. The calculated values of s r for the ions are collected in Table 5.…”

Section: Diffusion Coefficients Walden Products Of Ionsmentioning

confidence: 99%

Effect of 1-Octyl-3-Methylimidazolium Salicylate as an Active Pharmaceutical Ingredient (API-IL) on the Thermodynamic Behavior of Aqueous Glycine Solutions at T= 298.15 K

et al. 2019

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Background: The thermophysical properties of 1-octyl-3-methylimidazolium salicylate as an active pharmaceutical ingredient based on ionic liquid have been investigated in the presence of aqueous solutions of glycine. Therefore, the scope of this article was to determine these properties by measuring the densities, speeds of sound, viscosities, electrical conductances and refractive indices for ternary (glycine + 1-octyl-3-methylimidazolium salicylate + water) soloutions at T = 298.15 K. Methods: A commercial density and speed of sound measurement apparatus was used to measure the density and speed of sound data. Viscosities, electrical conductivities and refractive indices of the studied solutions were measured using digital viscometer, conductivity meter and refractometer, respectively. Results: Variety of properties such as partial molar volume of transfer ∆traV0ϕ, partial molar isentropic compressibility of transfer ∆traK0ϕ, viscosity B-coefficients of transfer ∆traB, ion association constants (KA) and molar refraction RD were determined to investigate the solute-solute and solute-solvent interactions in these systems. Conclusion: The positive values of transfer properties including partial molar volume of transfer (∆traV0ϕ), partial molar isentropic compressibility of transfer (∆traK0ϕ), and viscosity B-coefficients of transfer (∆traB) indicated that in these systems, the ion-polar and polar-polar interactions are dominant. The calculated hydration number showed that dehydration of glycine occurs in presence of this ionic liquid.

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On the Determination of Partial Molar Volumes, Partial Molar Refractions, Mean Electronic Polarizabilities and Effective Molecular Radii from Dilute Multi-component Data alone using Response Surface Models

Cited by 25 publications

References 19 publications

Thermophysical Properties of Protic Ionic Liquids Monoethanolamine, Diethanolamine, and Triethanolamine Lactate in Water

Thermophysical Properties of Protic Ionic Liquids Monoethanolamine, Diethanolamine, and Triethanolamine Lactate in Water

Thermophysical Properties of 1-Hexyl-3-methylimidazolium Salicylate as an Active Pharmaceutical Ingredient Ionic Liquid (API-IL) in Aqueous Solutions of Glycine and l-Alanine

Effect of 1-Octyl-3-Methylimidazolium Salicylate as an Active Pharmaceutical Ingredient (API-IL) on the Thermodynamic Behavior of Aqueous Glycine Solutions at T= 298.15 K

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