AI Article Synopsis
- Protic ionic liquids (PILs), particularly in water, are gaining interest due to their distinct properties, and their solvation is crucial for their applications.
- The study focused on the acidity of 49 amino acid ionic liquids (AAILs) to investigate how different cations and anions affect the acidity, challenging the idea that PILs' acidity is independent of anions.
- Using quantum chemistry calculations, researchers explored how cation-anion hydrogen bonds influence acidity, providing new insights into the solvation of PILs and the formation of solvated ion pairs.
Article Abstract
Protic ionic liquids (PILs) in solution especially in water have attracted more and more attention due to their unique properties. The solvation of PILs in water is important to their properties and applications. To explore the solvation of bio-based PILs in water, acidity of 49 [AA]X amino acid ionic liquids (AAILs) consisting of 7 different cations and 7 different anions was studied as a favorable probe. The pK values for [AA]X PILs containing same cations were obtained and discussed. The acidity strength of the [AA]X PILs varies with both cation and anion which does not follow the conventional assumption that the acidity for PILs is independent of anions. The acidic discrepancy of [AA]X PILs aqueous solution is probably mediated by the formation of ion pairs according to a revised solvation model of PILs. Quantum-chemistry calculation was employed to unpuzzle anion's different effects on the acid balance of cations where cation-anion hydrogen bonds play an important role. Such difference in acidity allows us to understand the formation of solvated ion pairs. This work provides an insight into the fundamental solvation of PILs from acid perspective and their influence on acidity properties for the first time.
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| http://dx.doi.org/10.1002/cphc.201900738 | DOI Listing |
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Article Synopsis
- Protic ionic liquids (PILs), particularly in water, are gaining interest due to their distinct properties, and their solvation is crucial for their applications.
- The study focused on the acidity of 49 amino acid ionic liquids (AAILs) to investigate how different cations and anions affect the acidity, challenging the idea that PILs' acidity is independent of anions.
- Using quantum chemistry calculations, researchers explored how cation-anion hydrogen bonds influence acidity, providing new insights into the solvation of PILs and the formation of solvated ion pairs.
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