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Brønsted acidity and the medium: fundamentals with a focus on ionic liquids
Umeå University, Faculty of Science and Technology, Department of Chemistry.
2011 (English)In: ChemPhysChem, ISSN 1439-4235, E-ISSN 1439-7641, Vol. 12, no 9, 1622-1632 p.Article in journal (Refereed) Published
Abstract [en]

Fundamental aspects of Brønsted acidity in ionic liquid systems, in relation to those of simple protic molecules in the gas phase, pure protic molecules in the condensed phase and solutions of protic molecules in molecular systems, are presented. The variety of acidities possible, beyond those observed in aqueous systems, is emphasised and discussed in terms of differences of solvent levelling, ionisation, dissociation, homo-/hetero-conjugate ion speciation and the stabilisation of proton-transfer products from solvent to solvent. It is argued that data regarding aqueous systems do not necessarily explain acid/base behaviour in other liquids satisfactorily. Methods of measuring acidity are reviewed, particularly by spectrophotometry and electrochemistry and recommendations proffered for estimating speciation and acidity of ionic liquids of various complexities.

Place, publisher, year, edition, pages
Wiley , 2011. Vol. 12, no 9, 1622-1632 p.
Keyword [en]
Brønsted acidity, density functional theory, ionic liquids, proton transfer, solvent levelling
National Category
Chemical Sciences
URN: urn:nbn:se:umu:diva-45067DOI: 10.1002/cphc.201100087PubMedID: 21633999OAI: diva2:425237
Available from: 2011-06-21 Created: 2011-06-21 Last updated: 2011-09-23Bibliographically approved

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Driver, Gordon W
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