Extraction of copper(II) ions from aqueous solutions with a methimazole-based ionic liquid Reyna-González, Juan M., Torriero, Angel A. J., Siriwardana, Amal I., Burgar, Iko M. and Bond, Alan M. 2010, Extraction of copper(II) ions from aqueous solutions with a methimazole-based ionic liquid, Analytical chemistry, vol. 82, no. 18, pp. 7691-7698, doi: 10.1021/ac101321a. Attached Files Name Description MIMEType Size Downloads Title Extraction of copper(II) ions from aqueous solutions with a methimazole-based ionic liquid Author(s) Reyna-González, Juan M. Torriero, Angel A. J. orcid.org/0000-0001-8616-365X Siriwardana, Amal I. Burgar, Iko M. Bond, Alan M. Journal name Analytical chemistry Volume number 82 Issue number 18 Start page 7691 End page 7698 Total pages 8 Publisher American Chemical Society Place of publication Chapel Hill, N.C. Publication date 2010-08-25 ISSN 0003-2700 1520-6882 Summary The recently synthesized ionic liquid (IL) 2-butylthiolonium bis(trifluoromethanesulfonyl)amide, [mimSBu][NTf2], has been used for the extraction of copper(II) from aqueous solution. The pH of the aqueous phase decreases upon addition of [mimSBu]+, which is attributed to partial release of the hydrogen attached to the N(3) nitrogen atom of the imidazolium ring. The presence of sparingly soluble water in [mimSBu][NTf2] also is required in solvent extraction studies to promote the incorporation of Cu(II) into the [mimSBu][NTf2] ionic liquid phase. The labile copper(II) system formed by interacting with both the water and the IL cation component has been characterized by cyclic voltammetry as well as UV−vis, Raman, and 1H, 13C, and 15N NMR spectroscopies. The extraction process does not require the addition of a complexing agent or pH control of the aqueous phase. [mimSBu][NTf2] can be recovered from the labile copper−water−IL interacting system by washing with a strong acid. High selectivity of copper(II) extraction is achieved relative to that of other divalent cobalt(II), iron(II), and nickel(II) transition-metal cations. The course of microextraction of Cu2+ from aqueous media into the [mimSBu][NTf2] IL phase was monitored in situ by cyclic voltammetry using a well-defined process in which specific interaction with copper is believed to switch from the ionic liquid cation component, [mimSBu], to the [NTf2] anion during the course of electrochemical reduction from Cu(II) to Cu(I). The microextraction−voltammetry technique provides a fast and convenient method to determine whether an IL is able to extract electroactive metal ions from an aqueous solution. Language eng DOI 10.1021/ac101321a Field of Research 030604 Electrochemistry 030102 Electroanalytical Chemistry Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences HERDC Research category C1.1 Refereed article in a scholarly journal Copyright notice ©2010, American Chemical Society Persistent URL http://hdl.handle.net/10536/DRO/DU:30038926 Document type: Journal Article Collections: Centre for Material and Fibre Innovation GTP Research Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Mon, 24 Oct 2011, 07:52:04 EST Mon, 24 Oct 2011, 09:25:37 EST Mon, 24 Oct 2011, 09:31:15 EST Mon, 24 Oct 2011, 09:37:57 EST Mon, 24 Oct 2011, 09:39:32 EST Mon, 21 May 2012, 16:15:59 EST Mon, 06 Aug 2012, 10:27:44 EST Mon, 16 Jun 2014, 18:57:18 EST Thu, 11 Dec 2014, 17:19:23 EST Filtered Full Citation counts:   Cited 51 times in TR Web of Science Cited 53 times in Scopus Search Google Scholar Access Statistics: 754 Abstract Views, 2 File Downloads  -  Detailed Statistics Created: Mon, 24 Oct 2011, 07:52:04 EST