1-Alkyl-3-methylimidazolium alkanesulfonate ionic liquids, [CnH2n+1mim][CkH2k+1SO3]: synthesis and physicochemical properties

Blešić, Marijana; Swadźba‐Kwaśny, Małgorzata; Belhocine, Tayeb; Gunaratne, H. Q. Nimal; Lopes, José N. Canongia; Gomes, Margarida F. Costa; Pádua, Agı́lio A. H.; Seddon, Kenneth R.; Rebelo, Luís Paulo N.

doi:10.1039/b910177m

Cited by 70 publications

(75 citation statements)

References 25 publications

(32 reference statements)

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“…Figure S1(a)], there is good agreement within the combined uncertainties with the results of Hasse et al; 26 the data of Ficke et al 27 are offset higher, by about 1.8 × 10 −3 g·cm −3 , more than the combined uncertainties, at lower temperatures, but they rapidly deviate to lower densities at higher temperatures (thus, these should be disregarded); those of Blesic et al 28 are systematically lower; and those of Singh et al 29 lie much higher than the other data sets (∼8−12 × 10 −3 g·cm −3 ) and can also be discounted.…”

Section: ■ Resultssupporting

confidence: 69%

Self-Diffusion Coefficients and Related Transport Properties for a Number of Fragile Ionic Liquids

Harris

Kanakubo

2016

J. Chem. Eng. Data

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Ion self-diffusion coefficients (D Si ) for [EMIM][CF 3 SO 3 ] and [chol][Tf 2 N] and cation self-diffusion coefficients for [CH 3 SO 3 ] − , [TCB] − , and [FAP] − salts of [EMIM] + are reported together with ancillary data allowing calculation of velocity cross-correlation (VCC or f ij ), distinct diffusion (D d ij ) and Laity resistance coefficients (r ij ). Comparison of ion Stokes−Einstein−Sutherland (SES) exponents is a useful test of experimental consistency. New analysis shows the viscosity (η) and molar conductivity (Λ) of [EMIM][CH 3 SO 3 ] and [EMIM][TCB] do not show the dynamic crossovers previously reported. Nor do D S and η for the comparison substance propylene carbonate. For all the ionic liquids, D S+ > D S-. Data show fractional SES (D Si -η, D d ij -η) and Walden (Λ−η) plots. The Nernst−Einstein parameter, Δ, for [EMIM][FAP] is approximately zero, implying the relative velocity of any ion pair selected randomly is uncorrelated with those of other distinct pairs. For the other ionic liquids, the relative pair velocities are anticorrelated. VCC values for the [EMIM] + salts except [EMIM] [FAP] lie in the order |f +− | < |f ++ | < | f −− |; that is, the anticorrelation is smallest for the unlike ion interactions: correspondingly, r ++ < r −− < r +− . For [EMIM][FAP], | f ++ | < |f +− | < |f −− |, with f +− ∼ ( f ++ + f −− )/2 and r +− 2 ∼r ++ r −− , consistent with Δ ∼ 0.

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Section: ■ Resultssupporting

confidence: 69%

Self-Diffusion Coefficients and Related Transport Properties for a Number of Fragile Ionic Liquids

Harris

Kanakubo

2016

J. Chem. Eng. Data

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“…This makes sense just from a topological perspective: if the polar network is larger due to bulkier ions (in this case the term ''ions" refers just to the highcharge density parts of the cation or anion), one also needs larger islands before the connection between them (''percolation") starts to happen. Another important aspect of structuring within the same homologous family concerns the recent systematic study of ionic liquids based on 1-alkyl-3-methylimidazolium cations combined with alkylsulfonate anions [14]. In this matrix-like family the alkyl-side chains can be located in the cation, in the anion, or in both ions.…”

Section: Resultsmentioning

confidence: 99%

Three commentaries on the nano-segregated structure of ionic liquids

Burgner

2010

Journal of Molecular Structure: THEOCHEM

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175

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“…82,83 This tendency is independent of the anion paired with the imidazolium cation and is for instance also applicable for alkylsulfonate and alkylsulfate anions. 84 With the aim of evaluating the effect of the anion on the densities of [C n mim] + based ILs, the densities at T = 298.15 K as a function of the number of carbons of the alkyl chain, n(C), are depicted in Fig. 2.…”

Section: Densitymentioning

confidence: 99%

Thermophysical properties of imidazolium tricyanomethanide ionic liquids: experiments and molecular simulation

Zubeir

Rocha

Vergadou

et al. 2016

Phys. Chem. Chem. Phys.

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The low-viscous tricyanomethanide ([TCM]À )-based ionic liquids (ILs) are gaining increasing interest as attractive fluids for a variety of industrial applications. The thermophysical properties (density, viscosity, surface tension, electrical conductivity and self-diffusion coefficient) of the 1-alkyl-3-methylimidazolium tricyanomethanide [C n mim][TCM] (n = 2, 4 and 6-8) IL series were experimentally measured over the temperature range from 288 to 363 K. Moreover, a classical force field optimized for the imidazolium-based[TCM] À ILs was used to calculate their thermodynamic, structural and transport properties (density, surface tension, self-diffusion coefficients, viscosity) in the temperature range from 300 to 366 K. The predictions were directly compared against the experimental measurements. The effects of anion and alkyl chain length on the structure and thermophysical properties have been evaluated. In cyano-based ILs, the density decreases with increasing molar mass, in contrast to the behavior of the fluorinated anions, being in agreement with the literature. The contribution per -CH 2 -group to the increase of the viscosity presents the following sequence: The experimentally determined self-diffusion coefficients of the cations are in good agreement with the molecular simulation predictions, in which a decrease of the self-diffusion of the cations with increasing alkyl chain length is observed with a simultaneous increase in viscosity and for the longer alkyl lengths the anion becomes more mobile than the cation.

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1-Alkyl-3-methylimidazolium alkanesulfonate ionic liquids, [CnH2n+1mim][CkH2k+1SO3]: synthesis and physicochemical properties

Cited by 70 publications

References 25 publications

Self-Diffusion Coefficients and Related Transport Properties for a Number of Fragile Ionic Liquids

Self-Diffusion Coefficients and Related Transport Properties for a Number of Fragile Ionic Liquids

Three commentaries on the nano-segregated structure of ionic liquids

Thermophysical properties of imidazolium tricyanomethanide ionic liquids: experiments and molecular simulation

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