Alternative probe for the determination of the hydrogen-bond acidity of ionic liquids and their aqueous solutions

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Madeira, PP (Author) Other; Passos, H (Author) Other; Gomes, J (Author) Other; Coutinho, JAP (Author) Other; Freire, MG (Author) Other

Journal

Title: Physical Chemistry Chemical Physics

Vol. 19 No. 2

ISSN: 1463-9076

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 26 Citations

Scopus - 26 Citations

Other information

Authenticus ID: P-010-Y0X

DOI: 10.1039/c6cp08210f

Abstract (EN): Although highly relevant to a priori select adequate solvents for a given application, the determination of the hydrogen-bond acidity or proton donor ability of aqueous solutions of ionic liquids is a difficult task due to the poor solubility of the commonly used probes in aqueous media. In this work, we demonstrate the applicability of the pyridine-N-oxide probe to determine the hydrogen-bond acidity of both neat ionic liquids and their aqueous solutions, based on 13C NMR chemical shifts, and the suitability of these values to appraise the ability of ionic liquids to form aqueous two-phase systems.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6