Reid, Joshua Elias Samuel James, Agapito, Filipe, Bernardes, Carlos E S et al. (4 more authors) (2017) Structure-property relationships in protic ionic liquids:A thermochemical study. Physical Chemistry Chemical Physics. pp. 19928-19936. ISSN 1463-9084
Abstract
How does cation functionality influence the strength of intermolecular interactions in protic ionic liquids (PILs)? Quantifying the energetics of PILs can be an invaluable tool to answer this fundamental question. With this in view, we have determined the standard molar enthalpy of vaporization, Delta H_vap , and the standard molar enthalpy of formation, Delta H_f, of three tertiary ammonium acetate PILs with varying cation functionality, and of their corresponding precursor amines, through a combination of Calvet-drop microcalorimetry, solution calorimetry, and ab-initio calculations. The obtained results suggest that these PILs vaporize as their neutral acid and base precursors. We also found a strong correlation between Delta H_vap of the PILs and of their corresponding amines. This suggests that, within this series of PILs, the influence of cation modification on their cohesive energies follows a group additivity rule. Finally, no correlation between the Delta H_vap of PILs and the extent of proton transfer, as estimated from the difference in aqueous pKa between the precursor acid and the conjugate acid of the precursor base, was observed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © the Owner Societies 2017. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 01 Aug 2017 13:30 |
Last Modified: | 30 Mar 2025 00:06 |
Published Version: | https://doi.org/10.1039/c7cp02230a |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1039/c7cp02230a |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:119701 |
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