Aprotic Ionic Liquids: A Framework for Predicting Vaporization Thermodynamics
Ionic liquids (ILs) are recognized as an environmentally friendly alternative to replacing volatile molecular solvents. Knowledge of vaporization thermodynamics is crucial for practical applications. The vaporization thermodynamics of five ionic liquids containing a pyridinium cation and the [NTf<...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/7/2321 |
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| author | Sergey P. Verevkin Dzmitry H. Zaitsau Ralf Ludwig |
| author_facet | Sergey P. Verevkin Dzmitry H. Zaitsau Ralf Ludwig |
| author_sort | Sergey P. Verevkin |
| collection | DOAJ |
| description | Ionic liquids (ILs) are recognized as an environmentally friendly alternative to replacing volatile molecular solvents. Knowledge of vaporization thermodynamics is crucial for practical applications. The vaporization thermodynamics of five ionic liquids containing a pyridinium cation and the [NTf<sub>2</sub>] anion were studied using a quartz crystal microbalance. Vapor pressure-temperature dependences were used to derive the enthalpies of vaporization of these ionic liquids. Vaporization enthalpies of the pyridinium-based ionic liquids available in the literature were collected and uniformly adjusted to the reference temperature <i>T</i> = 298.15 K. The consistent sets of evaluated vaporization enthalpies were used to develop the “centerpiece”-based group-additivity method for predicting enthalpies of vaporization of ionic compounds. The general transferability of the contributions to the enthalpy of vaporization from the molecular liquids to the ionic liquids was established. A small, but not negligible correction term was supposed to reconcile the estimated results with the experiment. The corrected “centerpiece” approach was recommended to predict the vaporization enthalpies of ILs. |
| first_indexed | 2024-03-09T11:35:55Z |
| format | Article |
| id | doaj.art-6a6876b0525645f59544a2b08668c8ae |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T11:35:55Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-6a6876b0525645f59544a2b08668c8ae2023-11-30T23:42:38ZengMDPI AGMolecules1420-30492022-04-01277232110.3390/molecules27072321Aprotic Ionic Liquids: A Framework for Predicting Vaporization ThermodynamicsSergey P. Verevkin0Dzmitry H. Zaitsau1Ralf Ludwig2Institut für Chemie, Abteilung für Physikalische Chemie, Universität Rostock, 18059 Rostock, GermanyInstitut für Chemie, Abteilung für Physikalische Chemie, Universität Rostock, 18059 Rostock, GermanyInstitut für Chemie, Abteilung für Physikalische Chemie, Universität Rostock, 18059 Rostock, GermanyIonic liquids (ILs) are recognized as an environmentally friendly alternative to replacing volatile molecular solvents. Knowledge of vaporization thermodynamics is crucial for practical applications. The vaporization thermodynamics of five ionic liquids containing a pyridinium cation and the [NTf<sub>2</sub>] anion were studied using a quartz crystal microbalance. Vapor pressure-temperature dependences were used to derive the enthalpies of vaporization of these ionic liquids. Vaporization enthalpies of the pyridinium-based ionic liquids available in the literature were collected and uniformly adjusted to the reference temperature <i>T</i> = 298.15 K. The consistent sets of evaluated vaporization enthalpies were used to develop the “centerpiece”-based group-additivity method for predicting enthalpies of vaporization of ionic compounds. The general transferability of the contributions to the enthalpy of vaporization from the molecular liquids to the ionic liquids was established. A small, but not negligible correction term was supposed to reconcile the estimated results with the experiment. The corrected “centerpiece” approach was recommended to predict the vaporization enthalpies of ILs.https://www.mdpi.com/1420-3049/27/7/2321ionic liquidsvapor pressure measurementsenthalpy of vaporizationstructure–property relationships |
| spellingShingle | Sergey P. Verevkin Dzmitry H. Zaitsau Ralf Ludwig Aprotic Ionic Liquids: A Framework for Predicting Vaporization Thermodynamics Molecules ionic liquids vapor pressure measurements enthalpy of vaporization structure–property relationships |
| title | Aprotic Ionic Liquids: A Framework for Predicting Vaporization Thermodynamics |
| title_full | Aprotic Ionic Liquids: A Framework for Predicting Vaporization Thermodynamics |
| title_fullStr | Aprotic Ionic Liquids: A Framework for Predicting Vaporization Thermodynamics |
| title_full_unstemmed | Aprotic Ionic Liquids: A Framework for Predicting Vaporization Thermodynamics |
| title_short | Aprotic Ionic Liquids: A Framework for Predicting Vaporization Thermodynamics |
| title_sort | aprotic ionic liquids a framework for predicting vaporization thermodynamics |
| topic | ionic liquids vapor pressure measurements enthalpy of vaporization structure–property relationships |
| url | https://www.mdpi.com/1420-3049/27/7/2321 |
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