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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Slow solvation in ionic liquids: connections to non-Gaussian moves and multi-point correlations.
Tamisra Pal,Ranjit Biswas +1 more
TL;DR: This paper explores an interconnection between timescales of dynamic heterogeneity (DH) in a neat ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]), and slow solvation of a dipolar solute, coumarin 153 (C153) in it at 298 K and 450 K, suggesting DH as a source for theSlow solvation at long-time in IL.
Journal ArticleDOI
Densification of Ionic Liquid Molecules within a Hierarchical Nanoporous Carbon Structure Revealed by Small-Angle Scattering and Molecular Dynamics Simulation
Jose Banuelos,Guang Feng,Pasquale F. Fulvio,Song Li,Gernot Rother,Sheng Dai,Peter T. Cummings,David J. Wesolowski +7 more
TL;DR: In this paper, the molecular-scale properties of the room temperature ionic liquid (RTIL) 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide, confined in nanometer-scale carbon pores have been investigated using small-angle X-ray and neutron scattering and fully atomistic molecular dynamics simulations.
Journal ArticleDOI
Effect of cationic head group on micellization behavior of new amide-functionalized surface active ionic liquids
Raman Kamboj,Pankaj Bharmoria,Vinay Chauhan,Gurbir Singh,Arvind Kumar,Sukhprit Singh,Tejwant Singh Kang +6 more
TL;DR: Steady-state fluorescence has provided information about cmc, aggregation number (Nagg) and polarity of the cybotactic region of the micelles, whereas ITC has provided insights into the thermodynamics of micellization.
Journal ArticleDOI
A green chemical approach for preparation of PtxCuy nanoparticles with a concave surface in molten salt for methanol and formic acid oxidation reactions
Haidong Zhao,Haidong Zhao,Chengzhang Yu,Hongjun You,Shengchun Yang,Yong Guo,Bingjun Ding,Xiaoping Song +7 more
TL;DR: In this article, the authors synthesized PtxCuy (x/y = 23/77, 51/49, 74/26, 83/17) nanoparticles with a concave and clean surface in the KNO3-LiNO3 molten salt system, in air, without using any organic solvent or capping agent.
Journal ArticleDOI
Assessment of imidazole-based ionic liquids as dual-mode spacecraft propellants
Steven P. Berg,Joshua L. Rovey +1 more
TL;DR: In this article, a literature review of ionic liquid physical properties is conducted to determine an initial, representative set of ions that shows favorable physical properties for both modes, followed by numerical and analytical performance simulations.
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.
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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.