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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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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The glass transition and the distribution of voids in room-temperature ionic liquids: a molecular dynamics study.
TL;DR: The temperature dependence of the size distribution of voids provided by simulation reproduce well the experimental results of positron annihilation lifetime spectroscopy reported in G. Dlubek, Y. Yu, R. Beichel, S. Bulut, N. Pogodina, and Ch.
Journal ArticleDOI
The Electrochemical Synthesis of Polycationic Clusters.
TL;DR: DFT calculations show that slight concerted displacements within the [Te8](2+) cluster lead to a fluxional molecular structure and a fast valence isomerism with a very low activation barrier of about 8 kJ mol(-1).
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Single-phase γ-Fe2O3 nanoparticles synthesized by green ionothermal method and their magnetic characterization
Maryam Sabbaghan,Pegah Sofalgar +1 more
TL;DR: In this paper, the structural and magnetic properties of these γ-Fe 2 O 3 nanoparticles were studied by using XRD, SEM and IR, and they were evaluated on a vibrating sample magnometer (VSM).
Journal ArticleDOI
Ion jelly conductive properties using dicyanamide-based ionic liquids.
Tânia Carvalho,Vera Augusto,Ângelo Rocha,Nuno M. T. Lourenco,Natália T. Correia,Susana Barreiros,Pedro Vidinha,Pedro Vidinha,Eurico J. Cabrita,Madalena Dionísio +9 more
TL;DR: New doorways are opened for practical applications by using IJ as a strategy to produce novel and stable electrolytes for different electrochemical devices by investigating the thermal behavior and transport properties of several ion jellys.
Journal ArticleDOI
Inelastic Scattering of Radicals at the Gas–Ionic Liquid Interface: Probing Surface Dynamics of BMIM–Cl, BMIM–BF4, and BMIM–Tf2N by Rovibronic Scattering of NO [2Π1/2(0.5)]
TL;DR: In this article, the authors explored inelastic collision dynamics at the gas-room temperature ionic liquid (RTIL) interface by scattering of an NO projectile beam, with laser induced fluorescence (LIF) detection yielding detailed distributions in vibrational, rotational, and spin-orbit degrees of freedom.
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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.
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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.