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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Book ChapterDOI
Effect of the Structures of Ionic Liquids on Their Physical Chemical Properties
Yufeng Hu,Xiaoming Peng +1 more
TL;DR: In this article, the structural properties of ILs are examined and the reasons behind the trends are briefly discussed on the basis of the structural effect on the interactions between the counterpart ions.
Book ChapterDOI
Synthesis, properties and physical applications of ionanofluids
Carlos Nieto de Castro,Ana P. C. Ribeiro,S. I. C. Vieira,João M. P. França,Maria José Lourenço,Fernando J. V. Santos,S. M. Sohel Murshed,Peter Goodrich,Christopher Hardacre +8 more
TL;DR: Ionic liquids have proved to be one of the most impressive classes of fluids, due to their properties and applications to chemistry and engineering as discussed by the authors, and they are a mixture of ionic liquid and nanomaterial, in the form of nanoparticle dispersion.
Journal ArticleDOI
A general design platform for ionic liquid ions based on bridged multi-heterocycles with flexible symmetry and charge
David M. Drab,Julia L. Shamshina,Marcin Smiglak,C. Corey Hines,David B. Cordes,Robin D. Rogers +5 more
TL;DR: A conceptual design platform for new ionic liquids with variable heterocycles, bridges, symmetry, and charge was developed using simple alkylation, click, and ionic liquid chemistries and demonstrated with 1-(2-(5-tetrazolidyl)ethyl)-3-1H-Tetrazolyl)methylimidazolium.
Journal ArticleDOI
Crystal Growth, Structure, and Polymorphic Behavior of an Ionic Liquid: Phthalate Derivative of N-Butyl,N-methylimidazolium Hexafluorophosphate
Clément Brandel,Gabin Gbabode,Yohann Cartigny,C. Martin,Géraldine Gouhier,Samuel Petit,Gérard Coquerel +6 more
TL;DR: In this article, two polymorphic forms were isolated from methanolic solution and characterized by XRPD, DSC, and Raman spectroscopy, and structural analyses carried out by using single-crystal (Form A) and powder (Form B) X-ray diffraction revealed a rotational disorder of anionic octahedrons and large conformational differences between cationic moieties caused by their molecular flexibility.
Journal ArticleDOI
A preliminary investigation on the use of organic ionic liquids as green solvents for acylation and oxidation reactions
TL;DR: In this article, three OILs were employed, 1-ethyl-3-methylimidazolium chloride, tetraethylammonium bromide, and 1-butyl-3methyloridazolate, for green solvents in Friedel-Crafts acylation and alcohol oxidation reactions, at room temperature, in a well-stirred lab-scale glass batch reactor.
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.