Structurally Related Scaling Behavior in Ionic Systems
| Autor: | Shinian Cheng, Małgorzata Musiał, Adam P. Holt, Eric Drockenmuller, Zaneta Wojnarowska, Marian Paluch, C. M. Roland |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Chemical substance 010304 chemical physics Hydrogen bond Intermolecular force Ionic bonding Thermodynamics 010402 general chemistry 01 natural sciences Article 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound chemistry 0103 physical sciences Ionic liquid Materials Chemistry Exponent Physical and Theoretical Chemistry Imide Scaling |
| Zdroj: | The Journal of Physical Chemistry. B |
| ISSN: | 1520-5207 1520-6106 |
| Popis: | We examine the density scaling properties of two ionic materials, a classic aprotic low molecular weight ionic liquid, 1-butyl-3-methylimidazolium bis(perfluoroethylsulfonyl)imide ([BMIm][BETI]), and a polymeric ionic liquid, poly(3-methyl-1,2,3-triazolium bis(trifluoromethylsulfonyl)imide) (TPIL). Density scaling is known to apply rigorously to simple liquids lacking specific intermolecular associations such as hydrogen bonds. Previous work has found that ionic liquids conform to density scaling over limited ranges of temperature and pressure. In this work, we find that the dc-conductivity of [BMIm][BETI] accurately scales for density changes of 17%; however, there is a departure from scaling for TPIL for even more modest variations of temperature and pressure. The entropy of both ionic samples conforms to density scaling only if the scaling exponent is allowed to vary linearly with the magnitude of the entropy. |
| Databáze: | OpenAIRE |
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