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
Two-dimensional structural ordering in a chromophoric ionic liquid for triplet energy migration-based photon upconversion
Shota Hisamitsu,Nobuhiro Yanai,Nobuhiro Yanai,Hironori Kouno,Eisuke Magome,Masaya Matsuki,Teppei Yamada,Teppei Yamada,Angelo Monguzzi,Nobuo Kimizuka +9 more
TL;DR: The diffusion length of triplet excitons in the IL phase, obtained by the analysis of upconverted emission in succession to triplet-triplet annihilation (TTA), is larger than the domain size estimated from powder X-ray analysis, which suggests that tripletexciton in chromophoric ILs can diffuse over the nanostructured domains.
Journal ArticleDOI
Thermodynamic analysis of CO2 separation from biogas with conventional ionic liquids
TL;DR: In this article, Ionic liquids have been proposed as potential absorbents for CO2 separation, and Ionic liquid absorbents have been used as absorbent for carbon dioxide separation.
Journal ArticleDOI
1-Ethyl-3-methylimidazolium acetate as a highly efficient organocatalyst for cyanosilylation of carbonyl compounds with trimethylsilyl cyanide.
TL;DR: 1-Ethyl-3-methylimidazolium acetate is introduced as a robust organocatalyst for solvent-free cyanosilylation of carbonyl compounds with trimethylsilyl cyanide (TMSCN).
Journal ArticleDOI
Molecular Mobility in a Set of Imidazolium-Based Ionic Liquids [bmim]+A- by the NMR-Relaxation Method.
Sergei S. Bystrov,Vladimir V. Matveev,Yurii S. Chernyshev,Vytautas Balevicius,Vladimir I. Chizhik +4 more
TL;DR: It follows from obtained results that the mobility of the hydrocarbon "tail" is higher (smaller τc) than that of the imidazole ring, and this expected tendency is quantified.
Journal ArticleDOI
Preparation and characterisation of high-density ionic liquids incorporating halobismuthate anions
Nico E. A. Cousens,Leah J. Taylor Kearney,Matthew T. Clough,Kevin R. J. Lovelock,Robert G. Palgrave,Susan Perkin +5 more
TL;DR: A range of ionic liquids containing dialkylimidazolium cations and halobismuthate anions were synthesised by combining dialky Limidazlium halide ions with bismuth(III) halide salts to establish their speciation and suitability for high-temperature applications.
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.