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Article

Rh(III) Aqueous Speciation with Chloride as a Driver for Its Extraction by Phosphonium Based Ionic Liquids

University Grenoble Alpes, CNRS, LEPMI, 38 000 Grenoble, France
*
Author to whom correspondence should be addressed.
Current address: Université Côte d’Azur, CNRS, Institut de Chimie de Nice, UMR 7272 Nice, France.
Academic Editors: Eric Guibal and Mark L. Dietz
Received: 5 March 2019 / Revised: 4 April 2019 / Accepted: 6 April 2019 / Published: 9 April 2019
(This article belongs to the Special Issue Ionic Liquids in Chemical Separations: Promise and Prospects)
In this work, the aqueous speciation of Rh(III) in chloride medium was investigated by UV-vis spectroscopy for ligand to metal ratios R = (Cl)/(Rh) ranging from 300 to 5000, at fixed Rh concentration (2.4 × 10−3 M). Under the chemical conditions of this work, no time evolution was observed, which allows for the fitting of the UV-vis data by Principal Component Analysis (PCA) and Multi-Curve Resolution (MCR). From this, and by comparison with literature data, the three independent species [RhCl4], [RhCl5]2− and [RhCl6]3− were identified, their individual absorption spectra derived and their respective contribution to the collected experimental UV-vis spectra calculated. Then, extraction of Rh(III) towards the ionic liquid trihexyltetradecylphosphonium chloride was performed. Comparison with the speciation data gives insight into the extraction mechanism and the extracted species. View Full-Text
Keywords: extraction; Rh(III); ionic liquid; speciation extraction; Rh(III); ionic liquid; speciation
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MDPI and ACS Style

Svecova, L.; Papaïconomou, N.; Billard, I. Rh(III) Aqueous Speciation with Chloride as a Driver for Its Extraction by Phosphonium Based Ionic Liquids. Molecules 2019, 24, 1391. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules24071391

AMA Style

Svecova L, Papaïconomou N, Billard I. Rh(III) Aqueous Speciation with Chloride as a Driver for Its Extraction by Phosphonium Based Ionic Liquids. Molecules. 2019; 24(7):1391. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules24071391

Chicago/Turabian Style

Svecova, Lenka, Nicolas Papaïconomou, and Isabelle Billard. 2019. "Rh(III) Aqueous Speciation with Chloride as a Driver for Its Extraction by Phosphonium Based Ionic Liquids" Molecules 24, no. 7: 1391. https://0-doi-org.brum.beds.ac.uk/10.3390/molecules24071391

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