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
Phase behavior and heat capacities of the 1-benzyl-3-methylimidazolium ionic liquids
Paulo B.P. Serra,Paulo B.P. Serra,Filipe Ribeiro,Marisa A.A. Rocha,Michal Fulem,Květoslav Růžička,Luís M. N. B. F. Santos +6 more
TL;DR: In this article, the thermal behavior, solid and liquid heat capacities of the 1-benzyl-3methylimidazolium, [Bzmim]+, based ionic liquid series with Cl−, PF6−, BF4−, CHF2CF2SO3− and NTf2− as anions were used to evaluate the effect of the insertion of an aromatic character.
Journal ArticleDOI
Bis-imidazolium and benzimidazolium based gemini-type ionic liquids structure: synthesis and antibacterial evaluation
TL;DR: In this paper, a set of geminal dicationic ionic liquids containing a sulphonamide moiety were successfully synthesized with good yields, and their structures were confirmed by 1H-NMR, 13C-NRT, FT-IR, and mass spectroscopy.
Journal ArticleDOI
Viscosities of Pure Ionic Liquids Using Combinations of Free Volume Theory or Friction Theory with the Cubic, the Cubic Plus Association, and the Perturbed-Chain Statistical Associating Fluid Theory Equations of State at High Pressures
TL;DR: In this paper, the behavior of nine ionic liquids (ILs) over wide ranges of pressures and temperatures were determined, including tetrafluoroborate, hexafluorophosphate, and bis[(trifluoromethyl)sulfonyl]imide.
Journal ArticleDOI
Group Contribution Methods for Estimation of Ionic Liquid Heat Capacities: Critical Evaluation and Extension
TL;DR: In this paper, an extensive database of ionic liquids (IL) heat capacity data as a function of temperature was compiled and used to evaluate two different group contribution method (GCM) approaches, analogously named the Meccano and Lego approaches, based on the nature of the fundamental building blocks used in each model.
Journal ArticleDOI
Modeling pVT Properties and Phase Equilibria for Systems Containing Ionic Liquids Using a New Lattice-Fluid Equation of State
TL;DR: In this article, a lattice-fluid equation of state (LF EoS) was developed and successfully applied to normal fluid systems (Xu et al. 2008, 265, 112).
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.