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
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
Citations
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Journal ArticleDOI
Thermal stability of imidazolium-based ionic liquids investigated by TG and FTIR techniques
TL;DR: In this article, thermal stability and thermal decomposition kinetics of 1-butyl-3methylimidazolium tetrafluoroborate ([bmim]BF4) were investigated using isothermal and non-isothermal thermo-gravimetric analysis.
Journal ArticleDOI
Vapor Pressure of Ionic Liquids
Markus Bier,Siegfried Dietrich +1 more
TL;DR: In this article, the authors argue that the extremely low vapor pressures of room temperature ionic liquids near their triple points are due to the combination of strong ionic characters and of low melting temperatures.
Journal ArticleDOI
Solubility and Diffusivity of CO2 in the Ionic Liquid 1-Butyl-3-methylimidazolium Tricyanomethanide within a Large Pressure Range (0.01 MPa to 10 MPa)
LF Lawien Zubeir,George E. Romanos,Wilko M. A. Weggemans,Boyan Iliev,Thomas J. S. Schubert,Maaike C. Kroon +5 more
TL;DR: In this paper, the 1-butyl-3-methylimidazolium tricyanomethanide (Bmim][tcm) was used as a solvent for CO2 capture.
Journal ArticleDOI
Water effect on physicochemical properties of 1-butyl-3-methylimidazolium based ionic liquids with inorganic anions
TL;DR: In this paper, the effect of nature of inorganic anion on hygroscopic property has been studied and the influence of temperature and water concentration on density, viscosity and specific electrical conductivity values has been investigated.
Journal ArticleDOI
Densities and Excess, Apparent, and Partial Molar Volumes of Binary Mixtures of BMIMBF 4 + Ethanol as a Function of Temperature, Pressure, and Concentration
TL;DR: In this article, the authors measured the densities of five BMIMBF4 (1-butyl-3-methylimidazolium tetrafluoroborate) + ethanol binary mixtures with compositions of (0.0701, 0.3147,0.5384, 0.,7452, and 0.9152) mole fraction with a vibrating-tube densimeter.
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.