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
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Journal Article
Physicochemical properties and toxicities of hydrophobic piperidinium and pyrrolidinium ionic liquids
Justin Salminen,Justin Salminen,Nicolas Papaiconomou,Nicolas Papaiconomou,R. Anand Kumar,Jong-Min Lee,Jong-Min Lee,John B. Kerr,John Newman,John Newman,John M. Prausnitz,John M. Prausnitz +11 more
TL;DR: Salminen et al. as discussed by the authors investigated the properties and toxicities of hydrophobic ionic liquids (ILs) containing 1-methyl-1-propyl pyrrolidinium [MPPyrro] +, 1-ethyl-1 butyl piperidiniam [MBPyrra] +, 1- methyl-1propyl polypropyl (MPPip) +,1-methyl-(1)-1-butyl)-pyrrolidine (MBPiperidine[MPPidinidine] + ], 1
Journal ArticleDOI
Synthesis and characterization of two ionic liquids with emphasis on their chemical stability towards metallic lithium
TL;DR: Two room temperature ionic liquids (RTILs) without acidic protons, based on different cationic species (BMMI) and N - n -butyl- N -methylpiperidinium (BMP) using (CF 3 SO 2 ) 2 N − (TFSI) as anion, were prepared by quaternization of their respective amines with an appropriate alkyl halide, followed by ion exchange reaction as mentioned in this paper.
Journal ArticleDOI
Excess properties for binary systems ionic liquid + ethanol : Experimental results and theoretical description using the ERAS model
TL;DR: In this article, the authors used the Extended Real Associated Solution (ERAS) model to extract information about the association capability of each ionic liquid with ethanol molecules through hydrogen bonds.
Journal ArticleDOI
Selective Extraction of Copper, Mercury, Silver, and Palladium Ions from Water Using Hydrophobic Ionic Liquids
TL;DR: In this article, a variety of ionic liquids containing octyl-4-methylpyridinium (4MOPYR) cations were used to extract dilute metal ions from water.
Journal ArticleDOI
Interactions and dynamics in ionic liquids
TL;DR: The spectra are dominated by a low-frequency process at approximately 1 GHz with a broad relaxation time distribution of the Cole-Davidson or Cole-Cole type, which is thought to correspond to the rotational diffusion of the dipolar cations.
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.