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

被引：25

作者：

Madeira, Pedro P. ^{[1
]}

Passos, Helena ^{[1
]}

Gomes, Joana ^{[1
]}

Coutinho, Joao A. P. ^{[1
]}

Freire, Mara G. ^{[1
]}

机构：

[1] Univ Aveiro, Dept Chem, CICECO Aveiro Inst Mat, P-3810193 Aveiro, Portugal

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2017年 / 19卷 / 18期

基金：

欧洲研究理事会;

关键词：

SOLVATOCHROMIC COMPARISON METHOD; BIPHASIC SYSTEMS; PI-STAR; SOLVENTS; SCALE; PARAMETERS; POLARITY; ALPHA; BETA; SOLVATION;

D O I：

10.1039/c6cp08210f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 C-13 NMR chemical shifts, and the suitability of these values to appraise the ability of ionic liquids to form aqueous two-phase systems.

引用

页码：11011 / 11016

页数：6

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