Journal ArticleDOI
Thermophysical Properties of Imidazolium-Based Ionic Liquids
Christopher P. Fredlake,Jacob M. Crosthwaite,Daniel G. Hert,and Sudhir N. V. K. Aki,Joan F. Brennecke +4 more
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TLDR
In this paper, the authors present density as a function of temperature, melting temperatures, glass transition temperatures, decomposition temperatures, and heat capacities for 13 ionic liquids, including 1-butyl-3-methylimidazolium trifluoromethanesulfonate.Abstract:
Ionic liquids (ILs) are salts that are liquid at low temperatures, usually including the region around room temperature. They are under intense investigation, especially as replacement solvents for reactions and separations, since they exhibit negligible vapor pressure and would not, therefore, contribute to air pollution. Clearly, basic thermophysical properties are vital for design and evaluation for these applications. We present density as a function of temperature, melting temperatures, glass-transition temperatures, decomposition temperatures, and heat capacities as a function of temperature for a series of 13 of the popular imidazolium-based ILs. The ionic liquids investigated here are 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium bromide, 1-butyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, 1-butyl-3-methylimidazolium tris(trifluoromethylsul...read more
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Electrochemical Behavior of Li2FeSiO4 with Ionic Liquids at Elevated Temperature
TL;DR: In this article, LiTFSI can be used as a salt in ionic liquid-based electrolytes for Li 2 FeSiO 4 cathodes operating at elevated temperatures of 60°C.
Journal ArticleDOI
Temperature Dependence of Physical Properties of Imidazolium Based Ionic Liquids: Internal Pressure and Molar Refraction
Tejwant Singh,Arvind Kumar +1 more
TL;DR: Kumar et al. as mentioned in this paper measured density, speed of sound and refractive index of the imidazolium-based ionic liquids (ILs), including 1-methyl-3-octylimidazolate [C8mim][Cl], 1-butyl-3methylimidaxolium methyl sulfate [C4mim], and 1- butyl-three-methylamide-morphogenide octyl sulfate (MEO), in the temperature range from 283.15 to 343.15
Journal ArticleDOI
Solubility of Sugars and Sugar Alcohols in Ionic Liquids: Measurement and PC-SAFT Modeling
TL;DR: The measured data as well as previously published solubility data of glucose and fructose in these ILs were modeled by means of PC-SAFT using a molecular-based associative approach for ILs, allowing accurate modeling of the pure IL data and the mixture data with only one binary interaction parameter.
Journal ArticleDOI
Pressure and Temperature Dependence of Isobaric Heat Capacity for [Emim][BF4], [Bmim][BF4], [Hmim][BF4], and [Omim][BF4]
TL;DR: In this paper, the isobaric molar heat capacity of a set of imidazolium-based ionic liquids is reported for the first time, for the 1-alkyl-3-methylimidazolinium series, concretely, [Emim][BF4], [Bmim], [BF4, [Hmim] and [Omim]-BF4.
Journal ArticleDOI
Solubility of phosphonium ionic liquid in alcohols, benzene, and alkylbenzenes
Urszula Domańska,L. M. Casás +1 more
TL;DR: Solid-liquid equilibria with immiscibility in the liquid phase were detected with the aromatic hydrocarbons ethylbenzene and propylbenzone and the basic thermodynamic properties of pure ionic liquid have been determined by differential scanning calorimetry.
References
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Journal ArticleDOI
Ionic Liquids-New "Solutions" for Transition Metal Catalysis.
Peter Wasserscheid,Wilhelm Keim +1 more
TL;DR: There are indications that switching from a normal organic solvent to an ionic liquid can lead to novel and unusual chemical reactivity, which opens up a wide field for future investigations into this new class of solvents in catalytic applications.
Journal ArticleDOI
Hydrophobic, Highly Conductive Ambient-Temperature Molten Salts
Pierre Bonhote,Ana-Paula Dias,Nicholas Papageorgiou,Kuppuswamy Kalyanasundaram,Michael Grätzel +4 more
TL;DR: New, hydrophobic ionic liquids with low melting points (<−30 °C to ambient temperature) have been synthesized and investigated, based on 1,3-dialkyl imidazolium cations and hydrophilic anions and thus water-soluble.
Journal ArticleDOI
Characterization and comparison of hydrophilic and hydrophobic room temperature ionic liquids incorporating the imidazolium cation
Jonathan G. Huddleston,Ann E. Visser,W. Matthew Reichert,Heather D. Willauer,Grant A. Broker,Robin D. Rogers +5 more
TL;DR: A series of hydrophilic and hydrophobic 1-alkyl-3-methylimidazolium room temperature ionic liquids (RTILs) have been prepared and characterized to determine how water content, density, viscosity, surface tension, melting point, and thermal stability are affected by changes in alkyl chain length and anion.
Journal ArticleDOI
Molecular states of water in room temperature ionic liquids
TL;DR: In this paper, the authors used ATR and transmission IR spectroscopy to investigate the state of water in room temperature ionic liquids (RTILs) based on the 1-alkyl-3-methylimidazolium cation with the anions.