Liquid densities, heat capacities, refractive index and excess quantities for {protic ionic liquids+water} binary system

Anouti, Mérièm; Caillon-Caravanier, Magaly; Dridi, Yosra; Jacquemin, Johan; Hardacre, Christopher; Lemordant, Daniel

doi:10.1016/j.jct.2009.01.011

Cited by 90 publications

(57 citation statements)

References 34 publications

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“…26,27 The literature survey reveals that the data on the electrical conductivity of ILs in molecular solvents are limited. 28,29 Zhang et al 30 studied the ionic conductivity of solutions of pyridinium based ionic liquids in different molecular solvents in different temperature ranges of 283.15 to 313.15 K. Buchner et al 31 compared the ionic association behaviour of [BMIM]Cl and [BMIM]BF 4 in methanol and dimethyl sulfoxide and used the low concentration chemical model (LcCM) to analyse the conductivity data. The limiting molar conductivities of selected binary mixtures of the imidazolium ILs in molecular solvents show a correlation of solvent properties such as polarity, viscosity, and relative permittivity with the conductivity of ILs.…”

Section: Introductionmentioning

confidence: 99%

Solvent-mediated molar conductivity of protic ionic liquids

Thawarkar

Khupse

Kumar

2015

Phys. Chem. Chem. Phys.

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The molar conductivity, Λm, of protic ionic liquids (PILs) in molecular solvents is measured at 298.15 K. The decrease in the Λm values of PILs is observed with an increase in the concentration of PILs. The limiting molar conductivities, Λm(0), were obtained for each PIL in different molecular solvents using a least squares method. The Λm(0) data for PILs were correlated with the structural aspects of PILs and solvent properties. The polar protic solvents show poor ionic association as compared to the polar aprotic solvents, which is discussed on the basis of the hydrogen bond donating (HBD) ability of solvents and PILs. The alkyl chain substitution of anions plays a significant role in the ionic association of the PILs. The diffusion coefficient D(0) and the transport number t were determined, which were consistent with the Λm(0) values of PILs in water. The Λm(0) and D(0) values are dependent on the hydrodynamic radius of anions of these ionic liquids. The extent of ionic association for each PIL was discussed using temperature dependent Λm data for aqueous PIL systems in terms of the Walden plot.

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Section: Introductionmentioning

confidence: 99%

Solvent-mediated molar conductivity of protic ionic liquids

Thawarkar

Khupse

Kumar

2015

Phys. Chem. Chem. Phys.

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“…In the majority of published studies, the effect of the alkyl chain length of the cation has been investigated. More recently, alkanoate anions have been considered in the synthesis of new ILs [19][20][21][22][23]. Greaves et al [22,23] synthesised different alkanoate ionic liquids and studied their nanostructure and some physicochemical properties.…”

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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“…Moreover, ionic liquid properties such as heat capacities and refractive index [7], luminescence properties [8], osmotic coefficients [9], enthalpy, density, heat capacity [10], and thermo physical properties [11] have been studied since their first synthesis. Therefore, following our previous studies on chemistry of ionic liquids', we decided to improve our knowledge about these compounds by synthesis, characterization, and theoretical study of a new borate-based ionic liquid.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization and Theoretical Study of a New Chromate Ionic liquid: Triphenylphosphonium Tetrafluorochromate

et al. 2012

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The synthesis of triphenylphosphonium tetrafluorochromate (III) liquid (IL) is reported here. The product was characterized by spectroscopic and analytical methods such as, FT-IR, cyclic voltammetry, CHN, TGA and differential thermal analysis (DTA). Thermal decomposition of this compound showed multistage processes and also results show that this IL has excellent thermal stability below 100°C. In this paper, the optimized geometries and frequencies of the stationary point and the minimum-energy paths were calculated by using the DFT (B3LYP) methods with 6-311G * basis sets. From these calculations, optimized geometries, molecular parameters, and vibrational spectra of IL have been calculated. In addition, calculated frequencies were compared with the experimental frequencies after correction by the appropriate scaling factor. This comparison showed that our theoretical data are in good agreement with the experimental results.

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Liquid densities, heat capacities, refractive index and excess quantities for {protic ionic liquids+water} binary system

Cited by 90 publications

References 34 publications

Solvent-mediated molar conductivity of protic ionic liquids

Solvent-mediated molar conductivity of protic ionic liquids

Ethylammonium alkanoate-based ionic liquid + water mixtures

Preparation, Characterization and Theoretical Study of a New Chromate Ionic liquid: Triphenylphosphonium Tetrafluorochromate

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