Viscosity Studies on Lithium Bromide in Water + Dimethyl Sulfoxide Mixtures at 278.15 K and 293.15 K

Palaiologou, Maria M.; Molinou, and Ioanna E.; Tsierkezos, Nikos G.

doi:10.1021/je020063s

Cited by 28 publications

(21 citation statements)

References 43 publications

(54 reference statements)

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“…So, in order to obtain the true activation energy E a (T ) as a function of temperature, we use the following equation: Fig. 1 Arrhenius activation energy E a of the pure liquid components versus the absolute temperature T as given in this work, previous works [2][3][4][5], and from the literature [12,13,[23][24][25][26][27][28][29][30][31][32][33][34][35][36]: (") water, (!) dioxane with the ln η(T ) values fitted by a least-squares optimization procedure to a fourth-order polynomial in the reciprocal of the absolute temperature (1/T ).…”

Section: Pure Componentsmentioning

confidence: 99%

Viscosity Arrhenius Activation Energy and Derived Partial Molar Properties in 1,4-Dioxane + Water Binary Mixtures from 293.15 to 323.15 K

2012

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The knowledge and prediction of physicochemical properties of binary liquid mixtures is of great importance for understanding intermolecular interactions. Viscosities (η) have been investigated by using density (ρ) and kinematic viscosity (ν) measurements for 1,4-dioxane + water (D-W) mixtures over the entire range of mole fractions under atmospheric pressure, at 311.15, 316.15 and 320.15 K, in order to increase the studied temperatures range available from the literature and to improve the investigations. The viscosity Arrhenius activation energy of 1,4-dioxane + water mixtures was calculated from the present experimental viscosity measurements, and those presented in a previous work at only four temperatures, and for three temperatures in the present work, over the entire range of composition in the temperatures range from 293.15 to 323.15 K. Based on the partial molar activation energy from the Arrhenius equation for viscosity, interactions between water and 1,4-dioxane molecules are discussed. Comparison between some reduced Redlich-Kister functions covering the composition domain shows the existence of two distinct behaviors.

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Section: Pure Componentsmentioning

confidence: 99%

Viscosity Arrhenius Activation Energy and Derived Partial Molar Properties in 1,4-Dioxane + Water Binary Mixtures from 293.15 to 323.15 K

2012

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“…This gives us n DMSO ; 65 C ¼ 1:4583. There is a 1.5% decrease from the value measured at 20 C. In another article from the same group, [16] the densities of DMSO=LiBr solutions at various molarities were measured at 20 C. At 0.1083 molÁL À1 , they report a density of 1.10831 gÁcm À3 (compare to 1.10041 for pure DMSO). Thus the change in density is small across the salt concentration range under consideration (þ0.7%) and we used the values determined in DMSO for processing the data.…”

Section: Methodsmentioning

confidence: 88%

Solution Properties of Poly(Methyl Methacrylate) in Dimethylsulfoxide

Moyses

2008

International Journal of Polymer Analysis and Characterization

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The solution properties of polymethylmethacrylate in dimethylsulfoxide were studied using multi-angle light scattering and an online viscometer coupled to size exclusion chromatography. The data demonstrate that DMSO is a suitable eluent for the determination of the molecular weight of PMMA by SEC. The Mark-Houwink coefficients K and a were determined as a function of temperature. At 35 C, DMSO is a theta solvent for PMMA, and it becomes a good solvent as the temperature increases. The unperturbed dimension K h was calculated using three different procedures. The data do not show evidence of a conformational transition controlled by the temperature such as the one reported in benzene and confirm the existence of a general relationship between the ratio K=K h and a. In the case of PMMA, the comparison of the dipole moment of the side group to that of the solvent can be used to predict the existence of a conformational transition.

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“…The synthesis of this molecule has not been reported to date but was carried out according to already reportedm ethods. [4] The main advantage of [D 6 ]DMSO/water blends as NMR solvents is their low viscosity at ambient temperature, [5] so that samplesm ay be prepared and transferred into an NMR sample tube without any difficulty,i nc ontrastt ot he solvents that are based on glycerol or glycerolc arbonate. AddingH 2 Ot o[ D 6 ]DMSOa lso opens the way of working at or below room temperature, which is especially appropriate for thermally unstable compounds.…”

Section: Introductionmentioning

confidence: 99%

Small Molecule Mixture Analysis by Heteronuclear NMR under Spin Diffusion Conditions in Viscous DMSO–Water Solvent

Lameiras

Patis

Jakhlal

et al. 2017

Chemistry A European J

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Spin diffusion in NMR occurs for small- and medium-sized molecules when their tumbling rate reduces in solution so that magnetization exchange by longitudinal cross relaxation becomes highly efficient. Composite DMSO-water viscous solvents were used for the first time to access the individual NMR spectra of a mixture components in spin diffusion conditions. The easy handling and high dissolution power of [D ]DMSO/H O offers a wide range of potential applications for polar and moderately apolar mixture analysis. In addition to 2D H- H NOESY and H- C HSQC-NOESY, H- N HSQC-NOESY, 1D and 2D H- F heteronuclear NOESY (HOESY) experiments were set up to offer new ways to individualize molecules within a mixture. This article reports the analysis of a polar mixture of four dipeptides dissolved in [D ]DMSO/H O (7:3 v/v) and that of a medium-polarity fluorinated dinucleotide dissolved in [D ]DMSO/H O (8:2 v/v) by means of spin diffusion in NOESY, HOESY, and HSQC-NOESY experiments.

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Viscosity Studies on Lithium Bromide in Water + Dimethyl Sulfoxide Mixtures at 278.15 K and 293.15 K

Cited by 28 publications

References 43 publications

Viscosity Arrhenius Activation Energy and Derived Partial Molar Properties in 1,4-Dioxane + Water Binary Mixtures from 293.15 to 323.15 K

Viscosity Arrhenius Activation Energy and Derived Partial Molar Properties in 1,4-Dioxane + Water Binary Mixtures from 293.15 to 323.15 K

Solution Properties of Poly(Methyl Methacrylate) in Dimethylsulfoxide

Small Molecule Mixture Analysis by Heteronuclear NMR under Spin Diffusion Conditions in Viscous DMSO–Water Solvent

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