Excess molar enthalpies of binary and ternary liquid mixtures

Sharma, V.K.; Solanki, S.; Bhagour, S.

doi:10.1007/s10973-014-4286-1

Cited by 6 publications

(3 citation statements)

References 38 publications

(57 reference statements)

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“…The Gutmann AN [12] is a well-established quantitative measure of Lewis acidity, and it could help to predict the intermolecular interactions of nucleophiles and other electron-rich substrates with the IL cations. Over the last years, experimental and/or theoretical thermodynamic studies on pure RTILs and their mixtures with water [13][14][15] or with organic solvents [16][17][18], which is important for the design of any technological processes, were reported. In the majority of published studies, the effect of the alkyl chain length of the cation has been investigated.…”

Section: Introductionmentioning

confidence: 99%

Ethylammonium alkanoate-based ionic liquid + water mixtures

Usula

Plechkova

Piras

et al. 2015

J Therm Anal Calorim

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A systematic study of a series of room-temperature ionic liquids, belonging to the ethylammonium alkanoate family (EAX), was carried out at 298.15 K and 0.1 MPa with the aim of investigating the effect of the anionic chain length on some thermophysical properties and their behaviour in water (W), over the whole mole fraction range. The determination of Gutmann acceptor numbers for the pure EAX by using 31 P NMR spectroscopy allowed us to obtain a quantitative measure of Lewis acidity. Experimental densities, q, were used to calculate molar volumes, V m , and excess molar volumes, V E . Complementary information was obtained by isothermal titration calorimetry that provided the values of the heat of mixing, H E , and the excess partial molar enthalpies of each component, H E 1 and H E 2 . The density values of pure EAX samples decrease as the alkyl chain length of the anion increases. Moderate negative V E and H E values were found for each EAX ? W system, indicating the presence of attracting interactions between the constituents.

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Section: Introductionmentioning

confidence: 99%

Ethylammonium alkanoate-based ionic liquid + water mixtures

Usula

Plechkova

Piras

et al. 2015

J Therm Anal Calorim

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“…A review of the literature revealed that thermodynamic properties of ternary mixtures containing the IL [EMIM][BF 4 ] with various organic solvents have been explored at varying temperatures by a number of researchers. − There have been no data published on the thermodynamic properties of the currently explored ternary mixtures. As a result, the originality of the current study is emphasized.…”

Section: Introductionmentioning

confidence: 99%

Experimental Measurements, Correlation, and Prediction Models to Study 1-Ethyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid Ternary Mixtures

Masilo,

Singh,

Bahadur

et al. 2024

J. Chem. Eng. Data

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Volumetric and acoustic properties were obtained using density, ρ 123 , and speed of sound, u 123 , experimental values for ternary systems of {[EMIM][BF 4 ] (x 1 ) + acetic acid (x 2 ) + acetophenone (x 3 )} (mix 1 ) and {[EMIM][BF 4 ] (x 1 ) + propionic acid (x 2 ) + acetophenone (x 3 )} (mix 2 ) at T = (293.15−333.15) K and 0.1 MPa. The observed V m123 Eand Δk s123 data of the studied ternary mixtures were modeled with a total of 63 evaluated models, which resulted from a sum of each of nine predictive terms (no estimated parameters) with each of seven correlative terms (estimated parameters). The entire model is a correlative model, and if all of the parameters of the correlative term are set to zero, it becomes a predictive model. The ideal number of parameters in the correlation was then approximated using standard deviations (σ). For mix 1 , V m123 E was only negative and Δk s123 was only positive, while for mix 2 both negative and positive results were found for each property. Also, quantitative results point out that mix 1 is closer to ideal behavior than mix 2 . The modeling for mix 2 employed more complex equations, with more parameters, and even so presented worse deviations than for mix 1 . These results evidence the effect of one CH 2 in the acid chain on the thermodynamic properties of these mixtures.

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“…In the past decade, interest of scientific community has been greatly increased in ILs due to their unique physical and chemical properties [1][2][3][4][5][6]. ILs possess remarkable properties like large liquid range, non-flammability, negligible vapour pressure, wide electrochemical window, high thermal stability and excellent ability to dissolve many organic and inorganic solutes.…”

Section: Introductionmentioning

confidence: 99%