Surface tension and refractive index of pure and water-saturated tetradecyltrihexylphosphonium-based ionic liquids

Almeida, Hugo F. D.; Lopes‐da‐Silva, José A.; Freire, Mara G.; Coutinho, João A. P.

doi:10.1016/j.jct.2012.09.004

Cited by 90 publications

(56 citation statements)

References 57 publications

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“…As previously observed for other ILs [6,31,[34][35][36]57], imidazolium-based fluids combined with cyanobased anions display low surface enthalpies and entropies when compared with molecular organic compounds. This low surface enthalpies and entropy reflect a high surface organization as well as a highly structured liquid phase.…”

Section: Surface Thermodynamics Properties and Estimated Critical Temsupporting

confidence: 77%

“…As reported in previous works [6,31,[34][35][36]57], the values for critical temperatures of ILs obtained by these approximations must be used with caution. The estimation of critical temperatures using data from a narrow temperature range, and demanding a large extrapolation, are a source of uncertainty.…”

Section: Surface Thermodynamics Properties and Estimated Critical Temmentioning

confidence: 89%

“…The density values required for the calculation of the surface tensions from the drop image data were taken from literature [29]. Further details on the equipment and its validity to measure surface tensions of ILs can be found in previous publications [34][35][36][37]. [38] is a well-known method for a priori prediction of thermophysical properties and phase behavior on the basis of unimolecular quantum chemical calculations.…”

Section: Surface Tension-mentioning

confidence: 99%

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Surface tensions of ionic liquids: Non-regular trend along the number of cyano groups

Almeida

Carvalho

Kurnia

et al. 2016

Fluid Phase Equilibria

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Ionic liquids (ILs) with cyano-functionalized anions are a set of fluids that are still poorly characterized despite their remarkably low viscosities and potential applications. Aiming at providing a comprehensive study on the influence of the number of -CN groups through the surface tension and surface organization of ILs, the surface tensions of imidazolium-based ILs with cyano-functionalized anions were determined at atmospheric pressure and in the ( Therefore, the surface tension of this homologous series does not decrease with the increase of the number of -CN groups at the anion as has been previously shown by studies performed with a more limited matrix of ILs. A maximum in the surface tension and critical temperature was observed for [N(CN) 2 ]-based ILs. Furthermore, a minimum in the surface entropy, indicative of a highly structured surface, was found for the same class of ILs. All these evidences seem to be a result of stronger hydrogen-bonding interactions occurring in [N(CN) 2 ]-based ILs, when compared with the remaining CN-based counterparts, and as sustained by cation-anion interaction energies derived from the Conductor Like Screening Model for Real Solvents (COSMO-RS).

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Section: Surface Thermodynamics Properties and Estimated Critical Temsupporting

confidence: 77%

Section: Surface Thermodynamics Properties and Estimated Critical Temmentioning

confidence: 89%

Section: Surface Tension-mentioning

confidence: 99%

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Surface tensions of ionic liquids: Non-regular trend along the number of cyano groups

Almeida

Carvalho

Kurnia

et al. 2016

Fluid Phase Equilibria

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“…Sodium chloride (Sigma-Aldrich, ≥99 wt%) was used to prepare brine solutions. To remove organic impurities, salt was heated up to 723 K for 12 h. Table 1 provides some further information on the chemicals used in this work, together with densities and viscosities of the pure components measured and compared with literature values [30,[33][34][35][36][37][38].…”

Section: Methodsmentioning

confidence: 99%

Phase behavior of the surfactant ionic liquid trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate with water and dodecane

Rodríguez-Escontrela

Rodríguez-Palmeiro

Rodrı́guez

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Coutinho et al [20,[24][25][26][27][28][29][30][31][32] found that surface tension in a couple of imidazolium-based IL series decreases with an increase in the cation side alkyl chain length up to hexyl and thus defined the CACL (critical alkyl chain length). On the other hand, surface tension remained almost constant for ILs with aliphatic moieties longer than the obtained CACL.…”

mentioning

confidence: 99%

Wettability and corrosion of [NTf2] anion-based ionic liquids on steel and PVD (TiN, CrN, ZrN) coatings

Blanco

Viesca

Mallada

et al. 2016

Surface and Coatings Technology

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The wetting and corrosion behavior of three bis(trifluoromethylsulfonyl)imide-based ionic liquids: 1-Dodecyl-3-methylimidazolium bis (trifluoromethylsulfonyl) ]/TiN resulted as the best IL-surface combination for a good wettability, due to the higher dispersion of the charge on the large size cation in this IL and the higher values of total and polar component of the surface free energy for this coating. Finally, SEM-EDS analysis determined that [N 1888 ][NTf 2 ]/ZrN was the best option in order to avoid corrosion problems. The evaporation of water, present as impurity in the ionic liquids, was found the main reason because of corrosion did not occur in the tests carried out at 100 ºC.

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Surface tension and refractive index of pure and water-saturated tetradecyltrihexylphosphonium-based ionic liquids

Cited by 90 publications

References 57 publications

Surface tensions of ionic liquids: Non-regular trend along the number of cyano groups

Surface tensions of ionic liquids: Non-regular trend along the number of cyano groups

Phase behavior of the surfactant ionic liquid trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate with water and dodecane

Wettability and corrosion of [NTf2] anion-based ionic liquids on steel and PVD (TiN, CrN, ZrN) coatings

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