Standard entropy, surface excess entropy, surface enthalpy, molar enthalpy of vaporization, and critical temperature of bis(trifluoromethanesulfonyl)imide-based ionic liquids

Wu, Tzi Yi; Chen, Bor Kuan; Kuo, Chung Wen; Lin, Haibo; Peng, Yu Chun; Sun, I‐Wen

doi:10.1016/j.jtice.2012.06.001

Cited by 24 publications

(21 citation statements)

References 51 publications

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“…The calculated T b values of ILs are given in Table 10. 54 The model is based on four assumptions which can be seen elsewhere 48,55,56 . In this model the interstice volume, v, for the ionic liquids was calculated using an equation from classical statistical mechanics.…”

Section: Rsc Advances Accepted Manuscriptmentioning

confidence: 99%

Synthesis, characterization and the effect of temperature on different physicochemical properties of protic ionic liquids

et al. 2015

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In this work, eleven protic ionic liquids (PILs) containing different cations and anions were prepared and their physicochemical properties were measured. All PILs's structures were confirmed by NMR and elemental analysis (CHNS) were carried out. The physicochemical properties such as density, surface tension, viscosity and thermal degradation behaviour were measured, and the effect of cation/anion was investigated. The density and viscosity were measured within the temperature range of 293.15-373.15 K at atmospheric pressure. The thermal expansion coefficient values were calculated from the density data. Surface tensions were measured in the temperature range of 293.15 to 353.15 K and further the values were used to estimate the surface entropy and enthalpy of the ionic liquids at 303.15 K. The boiling and critical temperature were also estimated according to the Eötvos and Rebelo methods.The refractive indices were measured within the temperature range of 293.15 to 323.15 K.The thermal gravimetric analysis was performed in the temperature range of 373.15-773.15 K.

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Section: Rsc Advances Accepted Manuscriptmentioning

confidence: 99%

Synthesis, characterization and the effect of temperature on different physicochemical properties of protic ionic liquids

et al. 2015

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“…Both surface excess entropy (Ss) and surface enthalpy (Hs) of [SiÀC 1 ÀC 3 mim][NTf 2 ] are in good agreement with those reported previously for imidazolium-based ILs bearing [NTf 2 ] À anion. [31] For instance, the surface excess entropy of studied IL (Ss = 0.051 mN m À1 K À1 ) is similar to that of 1ethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide ([C 2 C 3 im][NTf 2 ]) without the silyl functionality (Ss = 0.050 mN m À1 K À1 ). At the same time the surface enthalpy of 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 ).…”

Section: Surface Tension (G) Measurementsmentioning

confidence: 75%

“…Both surface excess entropy ( Ss ) and surface enthalpy ( Hs ) of [Si−C 1 −C 3 mim][NTf 2 ] are in good agreement with those reported previously for imidazolium‐based ILs bearing [NTf 2 ] − anion . For instance, the surface excess entropy of studied IL ( Ss =0.051 mN m −1 K −1 ) is similar to that of 1‐ethyl‐3‐propylimidazolium bis(trifluoromethylsulfonyl)imide ([C 2 C 3 im][NTf 2 ]) without the silyl functionality ( Ss =0.050 mN m −1 K −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…At the same time the surface enthalpy of 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 ). [31] The obtained surface excess enthalpy was found to be in the lower end of the usual range of values for ILs, indicating the existence of relatively weak interactions between the silyl-functionalized cation and the anion. Moreover, such low surface excess entropy of silyl-based IL is indicative of an inherently high structured liquid phase as well as of high surface organization in ILs compared to other molecular organic compounds.…”

Section: Surface Tension (G) Measurementsmentioning

confidence: 87%

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Ionic Liquid with Silyl Substituted Cation: Thermophysical and CO₂/N₂ Permeation Properties

Gouveia

Soares

Simões

et al. 2019

Israel Journal of Chemistry

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Novel functionalized ionic liquid (IL) combining an imidazolium‐based cation with branched alkyl chain bearing silyl group, 1‐methyl‐3‐(2‐methyl‐3‐(trimethylsilyl)propyl)imidazolium ([Si−C1−C3‐mim]+), and bis(trifluoromethylsulfonyl)imide ([NTf2]−) anion was synthesized and its thermophysical properties (density, viscosity, surface tension, surface entropy and enthalpy, thermal stability) were studied in a wide temperature range and compared with those of ILs having linear alkyl ([Cn‐mim][NTf2]) and siloxane ([(SiOSi)C1mim][NTf2]) side chains. It was found that at 25 °C [Si−C1−C3‐mim][NTf2] is a liquid with dynamic viscosity of 224 cP (224 mPa s) and density of 1.32 g cm−3. The presence of side branched alkyl chain with trimethylsilyl end‐group prevents crystallization of IL and leads to higher viscosities and lower densities in comparison with commonly known [Cn‐mim][NTf2] (n=2–4). As surface excess enthalpy was found to be in the lower end of the usual range of values for ILs, the interactions between silyl‐functionalized cation and [NTf2] anion can be considered as relatively weak. Finally, [Si−C1−C3‐mim][NTf2] was used for the preparation of polymer supported ionic liquid membranes (SILMs) and their CO2 and N2 permeation properties at 20 °C and 100 kPa were determined: permeability PCO2=311, PN2=12 Barrer, diffusivity DCO2=115×1012, DN2=227×1012 m2 s−1 and CO2/N2 permselectivity αCO2/N2=25.3.

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“…As shown by Eqns (4)-(6), there was a linear relationship between surface tension (σ ) and temperature (T) at a constant pressure for a liquid, while the surface entropy (S a ) and the surface enthalpy (E a ) of the liquid were nearly constant, weakly dependent on temperatures, and mathematically related to the slope and intercept of the linear relationship, [42][43][44] respectively.…”

Section: Calculation Of Surface Entropies and Surface Enthalpiesmentioning

confidence: 99%

Properties of ionic liquid mixtures of [NH₂e‐mim][BF₄] and [bmim][BF₄] as absorbents for CO₂ capture

et al. 2018

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Although the use of ‘task‐specific’ amine‐functionalized imidazolium‐based ionic liquids (ILs) such as [NH2emim][BF4] and conventional imidazolium‐based ILs [bmim][BF4]), as absorbents for CO2 capture, possesses some unique advantages, they have a number of disadvantages when independently used for CO2 capture. This study examined a series of binary liquid mixtures of [NH2emim][BF4] and [bmim][BF4] for CO2 capture, exploiting the advantages and reducing the disadvantages of each of the components. The CO2 absorption performances of the mixtures were investigated as well as their physicochemical properties. Densities, viscosities, and surface tensions of the mixtures of varying molar fractions of [NH2e‐mim][BF4] (from 0.2–0.5 mol/mol) were experimentally measured over a temperature range of 298.0–343.0 K at a fixed pressure of 0.1 MPa. Thermal expansion coefficients, excess logarithmic viscosities, surface entropies, and surface enthalpies were calculated based on the experimental data. All the estimated physicochemical properties in a mixture with a mole fraction of [NH2e‐mim][BF4] of 0.4 had variation characteristics significantly different from those in mixtures with other mole fractions, which might be attributed to the large interaction between the two kinds of IL components and showed a positive effect on CO2 absorption and desorption. The above laws were consistent with those of the CO2 capture performances of the IL mixtures basically. An IL mixture containing 0.4 mol/mol [NH2e‐mim][BF4] and 0.6 mol/mol [bmim][BF4] would be an optimal CO2‐capturing absorbent. The findings in this study may enrich the database and provide a theoretical support for CO2 capture with IL mixtures. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Standard entropy, surface excess entropy, surface enthalpy, molar enthalpy of vaporization, and critical temperature of bis(trifluoromethanesulfonyl)imide-based ionic liquids

Cited by 24 publications

References 51 publications

Synthesis, characterization and the effect of temperature on different physicochemical properties of protic ionic liquids

Synthesis, characterization and the effect of temperature on different physicochemical properties of protic ionic liquids

Ionic Liquid with Silyl Substituted Cation: Thermophysical and CO₂/N₂ Permeation Properties

Properties of ionic liquid mixtures of [NH₂e‐mim][BF₄] and [bmim][BF₄] as absorbents for CO₂ capture

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Standard entropy, surface excess entropy, surface enthalpy, molar enthalpy of vaporization, and critical temperature of bis(trifluoromethanesulfonyl)imide-based ionic liquids

Cited by 24 publications

References 51 publications

Synthesis, characterization and the effect of temperature on different physicochemical properties of protic ionic liquids

Synthesis, characterization and the effect of temperature on different physicochemical properties of protic ionic liquids

Ionic Liquid with Silyl Substituted Cation: Thermophysical and CO2/N2 Permeation Properties

Properties of ionic liquid mixtures of [NH2e‐mim][BF4] and [bmim][BF4] as absorbents for CO2 capture

Contact Info

Product

Resources

About

Ionic Liquid with Silyl Substituted Cation: Thermophysical and CO₂/N₂ Permeation Properties

Properties of ionic liquid mixtures of [NH₂e‐mim][BF₄] and [bmim][BF₄] as absorbents for CO₂ capture