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Title:	A simple halide-to-anion exchange method for heteroaromatic salts and ionic liquids
Author:	Alcalde Pais, Ma. Ermitas (María de las Ermitas); Dinarès Milà, M. Immaculada; Ibáñez Jiménez, Anna; Mesquida Estévez, Ma. Neus
Other authors:	Universitat de Barcelona
Abstract:	A broad and simple method permitted halide ions in quaternary heteroaromatic and ammonium salts to be exchanged for a variety of anions using an anion exchange resin (A− form) in non-aqueous media. The anion loading of the AER (OH− form) was examined using two different anion sources, acids or ammonium salts, and changing the polarity of the solvents. The AER (A− form) method in organic solvents was then applied to several quaternary heteroaromatic salts and ILs, and the anion exchange proceeded in excellent to quantitative yields, concomitantly removing halide impurities. Relying on the hydrophobicity of the targeted ion pair for the counteranion swap, organic solvents with variable polarity were used, such as CH3OH, CH3CN and the dipolar nonhydroxylic solvent mixture CH3CN:CH2Cl2 (3:7) and the anion exchange was equally successful with both lipophilic cations and anions.
Subject(s):	-Sals -Solucions iòniques -Compostos heterocíclics -Salts -Ionic solutions -Heterocyclic compounds
Rights:	cc-by (c) Alcalde Pais, Ma. Ermitas (María de las Ermitas) et al., 2012 http://creativecommons.org/licenses/by/3.0/es
Document type:	Article Article - Published version
Published by:	MDPI Publishing
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