From volatility to solubility : Thermodynamics of imidazolium-based ionic liquids containing chloride and bromide anions
| Autor: | Christoph Held, Dzmitry H. Zaitsau, Mark Bülow, Riko Siewert, Stephan Schulz, Manuel Loor, Andrey A. Pimerzin, Sergey P. Verevkin |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Chemie 02 engineering and technology 010402 general chemistry 01 natural sciences Chloride chemistry.chemical_compound Bromide Vaporization Materials Chemistry medicine Physical and Theoretical Chemistry Solubility Spectroscopy Thermal decomposition 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Hildebrand solubility parameter chemistry Ionic liquid Physical chemistry 0210 nano-technology Volatility (chemistry) medicine.drug |
| Popis: | Ionic liquids (ILs) are effectively used for tuning the composition and the morphology of nanoparticles or stabilizing agents for nanoparticles for catalytic dehydrogenation. Thermodynamic properties of ionic liquids, e.g. vapor pressures and vaporization enthalpies help optimise these processes. Vapor pressures and vaporization enthalpies of the series of 1-alkyl-3-methylimidazolium ionic liquids with chloride and bromide anions have been measured by using quartz-crystal microbalance (QCM). Possible thermal decomposition pathways of [C2C1Im][Br] during vaporization were analyzed by using high-level quantum-chemical methods. These theoretical results explained and supported the absence of decomposition in QCM experimental conditions. According to the measured vapor pressures the [CnC1Im][Cl] and [CnC1Im][Br] series are very suitable for catalytic applications, taking also into account their sufficient thermal stability at the level of 523–543 K. Solubility parameters of ILs and practically relevant solutes were assessed with help of experimental vaporization enthalpies. |
| Databáze: | OpenAIRE |
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