Extraction of silver(i) from aqueous solutions in the absence and presence of copper(ii) with a methimazole-based ionic liquid Reyna-Gonzalez, Juan M., Torriero, Angel A. J., Siriwardana, Amal I., Burgar, Iko M. and Bond, Alan M. 2011, Extraction of silver(i) from aqueous solutions in the absence and presence of copper(ii) with a methimazole-based ionic liquid, Analyst, vol. 136, no. 16, pp. 3314-3322, doi: 10.1039/c1an15103g. Attached Files Name Description MIMEType Size Downloads Title Extraction of silver(i) from aqueous solutions in the absence and presence of copper(ii) with a methimazole-based ionic liquid Author(s) Reyna-Gonzalez, Juan M. Torriero, Angel A. J. orcid.org/0000-0001-8616-365X Siriwardana, Amal I. Burgar, Iko M. Bond, Alan M. Journal name Analyst Volume number 136 Issue number 16 Start page 3314 End page 3322 Total pages 9 Publisher Royal Society of Chemistry Place of publication Cambridge, U. K. Publication date 2011 ISSN 0003-2654 1364-5528 Summary The ionic liquid (IL) 2-butylthiolonium bis(trifluoromethanesulfonyl)amide, [mimSBu][NTf2], facilitates the efficient extraction of silver(i) from aqueous media via interaction with both the cation and anion components of the IL. Studies with a conventional aqueous-IL two phase system as well as microextraction of silver(i) by a thick IL film adhered to an electrode monitored in situ by cyclic voltammetry, established that [mimSBu][NTf2] can extract electroactive silver(i) ions from an 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 silver(i) further increase the acidity of the aqueous phase as a consequence of coordination with the IL cation component. Voltammetric and 1H and 13C NMR techniques have been used to establish the nature of the silver(i) complexes extracted, and show that the form of interaction with the IL differs from that outlined previously for the extraction of copper(ii). Insights on the competition established when silver(i) is extracted in the presence of copper(ii) are provided. Finally, it is noted that metallic silver can be directly electrodeposited at the electrode surface after extraction of silver(i) into [mimSBu][NTf2] and that back extraction of silver(i) into aqueous media is achieved by addition of an acidic aqueous solution. Language eng DOI 10.1039/c1an15103g Field of Research 030604 Electrochemistry Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences HERDC Research category C1 Refereed article in a scholarly journal Copyright notice ©2011, The Royal Society of Chemistry Persistent URL http://hdl.handle.net/10536/DRO/DU:30040363 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, 05 Dec 2011, 12:32:32 EST Wed, 14 Dec 2011, 11:02:39 EST Wed, 14 Dec 2011, 11:05:48 EST Mon, 17 Jun 2013, 17:07:47 EST Fri, 13 Jun 2014, 11:53:14 EST Filtered Full Citation counts:   Cited 10 times in TR Web of Science Cited 11 times in Scopus Search Google Scholar Access Statistics: 604 Abstract Views, 2 File Downloads  -  Detailed Statistics Created: Mon, 05 Dec 2011, 12:32:32 EST

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