Ultrasonic studies of liquid mixtures of either water or dimethylsulfoxide with ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,2-propylene glycol and 1,4-butylene glycol at 298.15 K

Tsierkezos, Nikos G.; Palaiologou, Maria M.

doi:10.1080/00319100802104855

Cited by 42 publications

(21 citation statements)

References 43 publications

(26 reference statements)

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“…Further, we found low levels of water (below 75 ppm) for [Emim][Cl], [Emim][MeSO 4 ], [Bmim][BF 4 ], and [Bmim][Cl] which were analyzed by Karl Fischer titration. A comparison is made for the pure solvents in Table between the experimental ρ, u , and η values determined in the present study and those reported in the literature. − It can be seen that the values of the properties of DMSO well agree with those reported in the literature. − However, it is expected that there are discrepancies between values reported in the literature for the ρ and η of imidazolium-based ILs by different groups because of impurities such as water. Impurities in ILs may have a dramatic effect on its thermophysical properties.…”

Section: Methodssupporting

confidence: 74%

“…DMSO (Merck >99% of purity) was stored over freshly activated 3 Å molecular sieves and was purified by the standard method described by Riddick et al The purity of the DMSO was checked by comparing the measured ρ, u , and η which were in good agreement with literature values. − All of the ammonium family of ILs, namely, TMAH, TEAH, TPAH, and TBAH of general type [amine][anion], used in the present study were synthesized in our laboratory. The procedure for synthesis of ILs was delineated in our previous paper in detail .…”

Section: Methodsmentioning

confidence: 62%

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Evaluation of Thermophysical Properties of Ionic Liquids with Polar Solvent: A Comparable Study of Two Families of Ionic Liquids with Various Ions

et al. 2013

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In this work, we explore and compare the role of the ion effect on the thermophysical properties of two families of ionic liquids (ILs), namely, tetra-alkyl ammonium cation [R4N](+) with hydroxide [OH](-) anion and 1-alkyl-3-methyl imidazolium cation [amim](+) with different anions (chloride, methyl sulfate, and tetrafluoroborate), with polar solvent such as dimethylsulfoxide (DMSO) in the temperature range from 25 to 40 °C and over the whole concentration range of ILs. Two families of ILs, namely, tetramethyl ammonium hydroxide [(CH3)4N][OH] (TMAH), tetraethyl ammonium hydroxide [(C2H5)4N][OH] (TEAH), tetrapropyl ammonium hydroxide [(C3H7)4N][OH] (TPAH), and tetrabutyl ammonium hydroxide [(C4H9)4N][OH] (TBAH) from ammonium-based ILs and 1-ethyl-3-methylimidazolium chloride [Emim][Cl], 1-ethyl-3-methylimidazolium methylsulfate [Emim][MeSO4], 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF4], and 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) from imidazolium family of ILs, are used in the present study. To address the molecular interactions of ILs with DMSO, densities (ρ), ultrasonic sound velocities (u), and viscosities (η) have been measured over the entire composition range and at four temperatures, 25, 30, 35, and 40 °C, under atmospheric pressure. From these experimental data, the excess molar volume (V(E)), the deviation in isentropic compressibility (Δκs), and the deviation in viscosity (Δη) were calculated and were adequately correlated by using the Redlich-Kister polynomial equation. The measured and predicted data were interpreted on the basis of intermolecular interactions and structural effects between like and unlike molecules upon mixing. The hydrogen-bonding features between ammonium-based ILs and DMSO were analyzed using molecular modeling program by HyperChem 7.

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Section: Methodssupporting

confidence: 74%

Section: Methodsmentioning

confidence: 62%

Evaluation of Thermophysical Properties of Ionic Liquids with Polar Solvent: A Comparable Study of Two Families of Ionic Liquids with Various Ions

et al. 2013

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“…In this regard, it would be helpful if one could predict the physicochemical properties of polydisperse PEGs based on the analysis of their exact composition. It should be noted that even the low average molar mass PEG 200 covers oligomers from mono- to nonaethylene glycol with tetra- and pentaethylene glycol being the most prominent components. , A perusal of the literature reveals that there are numerous reports on density and viscosity for the neat lowest oligomers diethylene glycol, ,,− ,− trietheylene glycol, ,− ,,,,− ,− ,− ,− and tetraethylene glycol, ,,…”

Section: Introductionmentioning

confidence: 99%

Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers

Hoffmann

Horowitz

Gutmann³

et al. 2021

J. Chem. Eng. Data

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Polyethylene glycol (PEG) is gaining interest as an alternative green solvent in chemical synthesis and processing. This report presents density and viscosity data from 293.15 K to 358.15 K as well as self-diffusion coefficient data from 298.15 K to 358.15 K for oligomers of PEG from di-to nonaethylene glycol. The results were obtained by extrapolation from measurement series where water, the most common impurity in PEGs, was intentionally added in several increments. The obtained results are carefully compared to literature data, which are widely available only for density and viscosity, and only for the lower oligomers. Densities are found to be linearly dependent on temperatures for all studied oligomers. The temperature dependence of viscosity and self-diffusion coefficients show only slight deviations from the Arrhenius equation over the investigated temperature range. The activation energies obtained from the viscosity data agree well with the activation energies from the self-diffusion coefficient data and appear to be linearly dependent with respect to the number of ethylene oxide repeat units in the PEG oligomer. This linearity combined with the observation that the pre-exponential factor appears to be the same for all studied oligomers may serve as a tool to estimate viscosities and self-diffusion coefficients for higher oligomers within the investigated temperature range. The densities of the oligomers all fall within a rather narrow range without a clear trend in homologous series.

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“…Figure shows compressiblities of the system propane-1,2-diol–water obtained at 298.15 K, plotted against the composition of the mixture, together with respective values reported by Tsiekezos and Palaiologou . The lines in the figures are guide lines.…”

Section: Results and Discussionmentioning

confidence: 88%

Apparent Molar Volumes and Isentropic Compressibilities of Tetraalkylammonium Bromides in Aqueous Propane-1,2-diol. An Attempt to Design Hydraulic Liquids

Grzybkowski

Warmińska

2016

J. Chem. Eng. Data

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Ultrasonic studies of liquid mixtures of either water or dimethylsulfoxide with ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,2-propylene glycol and 1,4-butylene glycol at 298.15 K

Cited by 42 publications

References 43 publications

Evaluation of Thermophysical Properties of Ionic Liquids with Polar Solvent: A Comparable Study of Two Families of Ionic Liquids with Various Ions

Evaluation of Thermophysical Properties of Ionic Liquids with Polar Solvent: A Comparable Study of Two Families of Ionic Liquids with Various Ions

Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers

Apparent Molar Volumes and Isentropic Compressibilities of Tetraalkylammonium Bromides in Aqueous Propane-1,2-diol. An Attempt to Design Hydraulic Liquids

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