Nucleic acid bases in 1-alkyl-3-methylimidazolium acetate ionic liquids: A thermophysical and ionic conductivity analysis

Araújo, João M. M.; Pereiro, Ana B.; Alves, Filipa; Marrucho, Isabel M.; Rebelo, Luís Paulo N.

doi:10.1016/j.jct.2012.07.022

Cited by 66 publications

(76 citation statements)

References 46 publications

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“…Conductivity measurements of this IL in Regensburg covered the temperature range of (298 to 418) K. The obtained κ(T) scatter within ± 0.3 % around the VFT fit, eq 3 ( Figure 3). The conductivity values published by Pereiro et al 36 for 298.15 ≤ (T/K) ≤ 323.15 and by Araujo et al 34 for 283.15 ≤ (T/K) ≤ 323.15, with claimed relative uncertainties of 1 %, are in fair agreement with the present data, albeit generally systematically higher (δ ≤ 0.13). The conductivity values published by Pereiro et al 36 for 298.15 ≤ (T/K) ≤ 323.15 and by Araujo et al 34 for 283.15 ≤ (T/K) ≤ 323.15, with claimed relative uncertainties of 1 %, are in fair agreement with the present data, albeit generally systematically higher (δ ≤ 0.13).…”

Section: ■ Results and Discussionsupporting

confidence: 92%

“…Literature data for comparison are rather rare. In view of sample specifications 34,36 comparable to ours (Table 1) such deviations seem surprising. In view of sample specifications 34,36 comparable to ours (Table 1) such deviations seem surprising.…”

Section: ■ Results and Discussionmentioning

confidence: 45%

“…Since all ρ(T) values exhibiting such behavior were determined with vibrating-tube densimeters, this oscillation probably reflects deficiencies of the measurement technique for highly viscous samples 31 which were not fully compensated by the automatic correction routine implemented in newer instruments, like the Anton Paar DMA [Ac] from this study ( ■ ) and corresponding fit with eq 3 (solid line, for parameters see Table 6); (b) corresponding relative deviation, δ, from the fit. Also included are the data (a) and their deviation from the present fit (b) of Fendt et al, 56 Freire et al, 32 Hou et al, 39 Pereiro et al, 36 Quijada-Maldonado et al, 55 Araujo et al, 34 and Castro et al 54 5000 used in this investigation. Also included are the data (a) and their deviation from the present fit (b) of Fendt et al, 56 Freire et al, 32 Hou et al, 39 Pereiro et al, 36 Quijada-Maldonado et al, 55 Araujo et al, 34 and Castro et al 54 5000 used in this investigation.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Densities, Viscosities, and Conductivities of the Imidazolium Ionic Liquids [Emim][Ac], [Emim][FAP], [Bmim][BETI], [Bmim][FSI], [Hmim][TFSI], and [Omim][TFSI]

et al. 2015

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Data for the transport properties electrical conductivity, κ, and dynamic viscosity, η, of the imidazolium ionic liquids [Emim][FAP], [Emim][Ac], [Bmim][BETI], [Bmim][FSI], [Hmim][TFSI], and [Omim]-[TFSI] (κ only) is presented. Electrical conductivity has been studied in the wide temperature range of (273.15 to 468.15) K, whereas η was determined in the range of (273.15 to 408.15) K. The data could be well fitted by the empirical Vogel−Fulcher−Tammann equation. Additionally, the densities of these ionic liquids, showing a linear dependence on temperature, were collected from (273.15 to 363.15) K. a Standard uncertainty u(p) = 10 kPa; for the particular samples investigated the standard uncertainty of ρ is 0.01 kg·m −3 , but due to the limited purity of the ILs u r (ρ) = 0.0001 for [Emim][FAP], 0.001 for [Bmim][BETI], [Bmim][FSI] and [Hmim][TFSI], and 0.005 for [Emim][Ac]. Accordingly, uncertain digits of the present data are bracketed.B a Standard uncertainty u(p) = 10 kPa. b Expanded (k = 2) relative uncertainty, U r (η) = 0.015. c U r (η) = 0.02.

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Section: ■ Results and Discussionsupporting

confidence: 92%

Section: ■ Results and Discussionmentioning

confidence: 45%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Densities, Viscosities, and Conductivities of the Imidazolium Ionic Liquids [Emim][Ac], [Emim][FAP], [Bmim][BETI], [Bmim][FSI], [Hmim][TFSI], and [Omim][TFSI]

et al. 2015

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“…Since the relative deviation was positive, it is possible that the water concentration of that work was higher than that in this work. The deviation from Araujo et al 34 was higher (positive) than the uncertainty in this work and water concentration was also higher than that in this work; however, the deviation cannot be easily explained because the sample purity was lower than others (> 95 %). The acetate containing IL is well-known to be strongly hydrophilic, and water will affect the IL density.…”

Section: ■ Experimental Sectioncontrasting

confidence: 76%

Densities at Pressures up to 200 MPa and Atmospheric Pressure Viscosities of Ionic Liquids 1-Ethyl-3-methylimidazolium Methylphosphate, 1-Ethyl-3-methylimidazolium Diethylphosphate, 1-Butyl-3-methylimidazolium Acetate, and 1-Butyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide

et al. 2015

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High pressure densities at (10−200) MPa over a range of temperatures and atmospheric pressure viscosities at (293−373) K for three ionic liquids (ILs) that are able to dissolve biomass, 1-ethyl-3-methylimidazolium methylphosphate ([emim][MP]), 1-ethyl-3-methylimidazolium diethylphosphate ([emim][DEP]), and 1-butyl-3-methylimidazolium acetate ([bmim][Ac]) are reported. Densities of the IL 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([bmim][Tf 2 N]) were measured at the same conditions to verify the apparatus and to extend the range of present data. The high pressure densities of [emim][MP] and [emim][DEP] are newly measured in this work. Combined expanded uncertainties of densities for [emim][MP], [emim][DEP], [bmim][Ac], and [bmim][Tf 2 N] were estimated to be 1.5 kg·m −3 , 1.4 kg·m −3 , 1.4 kg·m −3 , and 1.7 kg·m −3 , respectively. The Tait equation could correlate the experimental density data to within 0.03 % of average relative deviation. The derivative properties, isobaric expansivity, and isothermal compressibility were calculated using the Tait equation and it was observed that the isobaric expansivity decreased with increasing temperature. The trend of the isobaric expansivity and isothermal compressibility with temperature were in accordance with the theory of corresponding states using methanol for comparison.

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“…Qian et al [14] determined densities and viscosities of 1-methylimidazolium acetate IL and its binary mixtures with alcohols. Araujo et al [15] determined viscosities of C 2 mimAc with nucleic acid bases. Quijada et al [16] determined the viscosities and densities of mixtures of (water + ethanol) with C 2 mimAc at temperatures from (298 to 343) K. Romich et al [17] determined viscosities and densities of mixtures (water + C 2 mimAc) at temperatures from (293 to 353) K at water molar fractions higher than 0.34.…”

Section: Introductionmentioning

confidence: 99%

Influence of water concentration in the viscosities and densities of cellulose dissolving ionic liquids. Correlation of viscosity data

Parra

Zambrano

Bermejo

et al. 2015

The Journal of Chemical Thermodynamics

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a b s t r a c tThe densities and viscosities of aqueous mixtures of two cellulose dissolving ionic liquids: 1-allyl-3-methylimidazolium chloride and 1-ethyl-3-methyl imidazolium acetate ionic liquids have been experimentally determined for water concentration up to approx. 35% water at atmospheric pressure and temperature range from (298.15 to 373.15) K. Molar excess volumes were calculated, resulting in negative values. Literature viscosity correlations were modified in order to describe the viscosity as a function of temperature and water concentration for both water concentrations lower than x H 2 O = 0.4 and for all the water concentration range. These modified equations were applied to correlate viscosity of (water + -ionic liquid) viscosity data for other 1-alkyl-3-methylimidazolium chloride ionic liquids as well as for (ethanol + 1-ethyl-3-methyl imidazolium acetate) from literature obtaining a good reproducibility of the data.

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Nucleic acid bases in 1-alkyl-3-methylimidazolium acetate ionic liquids: A thermophysical and ionic conductivity analysis

Cited by 66 publications

References 46 publications

Densities, Viscosities, and Conductivities of the Imidazolium Ionic Liquids [Emim][Ac], [Emim][FAP], [Bmim][BETI], [Bmim][FSI], [Hmim][TFSI], and [Omim][TFSI]

Densities, Viscosities, and Conductivities of the Imidazolium Ionic Liquids [Emim][Ac], [Emim][FAP], [Bmim][BETI], [Bmim][FSI], [Hmim][TFSI], and [Omim][TFSI]

Densities at Pressures up to 200 MPa and Atmospheric Pressure Viscosities of Ionic Liquids 1-Ethyl-3-methylimidazolium Methylphosphate, 1-Ethyl-3-methylimidazolium Diethylphosphate, 1-Butyl-3-methylimidazolium Acetate, and 1-Butyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide

Influence of water concentration in the viscosities and densities of cellulose dissolving ionic liquids. Correlation of viscosity data

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