About the Purification Route of Ionic Liquid Precursors
AbstractIn this work a purification route of precursors for ionic liquids tailored to electrochemical energy storage systems is reported and described. The study was carried out on the N-butyl-N-methylpyrrolidinium bromide (PYR14Br) precursor, which represents the intermediate product of the synthesis process of the N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) hydrophobic ionic liquid. The target is to develop an easy and cost-effective approach for efficiently purifying several kinds of ionic liquid precursors and determining their purity content. The PYR14Br precursor was synthesized through an eco-friendly preparation procedure, which requires water as the only processing solvent, and purified through sorbent materials, such as activated charcoal and alumina. The effect of the treatment/nature/content of sorbents and processing temperature/time was investigated. The impurity content was detected by UV-VIS spectrophotometry measurements. Additionally, a correlation between the measured absorbance and the content of impurities within the precursor was obtained. The purity level of the precursor was seen to play a key role in the electrochemical performance of the ionic liquids. View Full-Text
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De Francesco, M.; Simonetti, E.; Gorgi, G.; Appetecchi, G.B. About the Purification Route of Ionic Liquid Precursors. Challenges 2017, 8, 11.
De Francesco M, Simonetti E, Gorgi G, Appetecchi GB. About the Purification Route of Ionic Liquid Precursors. Challenges. 2017; 8(1):11.Chicago/Turabian Style
De Francesco, Massimo; Simonetti, Elisabetta; Gorgi, Gianremo; Appetecchi, Giovanni B. 2017. "About the Purification Route of Ionic Liquid Precursors." Challenges 8, no. 1: 11.