On the concept of ionicity in ionic liquids MacFarlane, Douglas R., Forsyth, Maria, Izgorodina, Ekaterina I., Abbott, Andrew P., Annat, Gary and Fraser, Kevin 2009, On the concept of ionicity in ionic liquids, Physical chemistry chemical physics, vol. 11, no. 25, pp. 4962-4967, doi: 10.1039/B900201D. Attached Files Name Description MIMEType Size Downloads Title On the concept of ionicity in ionic liquids Author(s) MacFarlane, Douglas R. Forsyth, Maria orcid.org/0000-0002-4273-8105 Izgorodina, Ekaterina I. Abbott, Andrew P. Annat, Gary Fraser, Kevin Journal name Physical chemistry chemical physics Volume number 11 Issue number 25 Start page 4962 End page 4967 Total pages 6 Publisher Royal Society of Chemistry Place of publication Cambridge, England Publication date 2009 ISSN 1463-9076 1463-9084 Summary Ionic liquids are liquids comprised totally of ions. However, not all of the ions present appear to be available to participate in conduction processes, to a degree that is dependent on the nature of the ionic liquid and its structure. There is much interest in quantifying and understanding this ‘degree of ionicity’ phenomenon. In this paper we present transport data for a range of ionic liquids and evaluate the data firstly in terms of the Walden plot as an approximate and readily accessible approach to estimating ionicity. An adjusted Walden plot that makes explicit allowance for differences in ion sizes is shown to be an improvement to this approach for the series of ionic liquids described. In some cases, where diffusion measurements are possible, it is feasible to directly quantify ionicity via the Nernst–Einstein equation, confirming the validity of the adjusted Walden plot approach. Some of the ionic liquids studied exhibit ionicity values very close to ideal; this is discussed in terms of a model of a highly associated liquid in which the ion correlations have similar impact on both the diffusive and conductive motions. Ionicity, as defined, is thus a useful measure of adherence to the Nernst–Einstein equation, but is not necessarily a measure of ion availability in the chemical sense. Language eng DOI 10.1039/B900201D Field of Research 039999 Chemical Sciences not elsewhere classified Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences HERDC Research category C1.1 Refereed article in a scholarly journal Copyright notice ©2009, Owner Societies Persistent URL http://hdl.handle.net/10536/DRO/DU:30030200 Document type: Journal Article Collections: Institute for Technology Research and 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 Fri, 10 Sep 2010, 15:10:08 EST Thu, 16 Sep 2010, 11:36:26 EST Thu, 16 Sep 2010, 11:38:21 EST Thu, 11 Dec 2014, 16:44:16 EST Filtered Full Citation counts:   Cited 464 times in TR Web of Science Cited 487 times in Scopus Search Google Scholar Access Statistics: 977 Abstract Views, 1 File Downloads  -  Detailed Statistics Created: Fri, 10 Sep 2010, 15:10:08 EST

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