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Title: Ionic liquid analogues formed from hydrated metal salts
Authors: Abbott, A. P.
Capper, G.
Davies, David L.
Rasheed, R. K.
First Published: 2004
Citation: Chemistry European Journal, 2004, 10 (15), pp.3769-3774
Abstract: A dark green, viscous liquid can be formed by mixing choline chloride with chromium(III) chloride hexahydrate and the physical properties are characteristic of an ionic liquid. The eutectic composition is found to be 1:2 choline chloride/chromium chloride. The viscosity and conductivity are measured as a function of temperature and composition and explained in terms of the ion size and liquid void volume. The electrochemical response of the ionic liquid is also characterised and it is shown that chromium can be electrodeposited efficiently to yield a crack-free deposit. This approach could circumvent the use of chromic acid for chromium electroplating, which would be a major environmental benefit. This method of using hydrated metal salts to form ionic liquids is shown to be valid for a variety of other salt mixtures with choline chloride.
DOI Link: 10.1002/chem.200400127
ISSN: 0947-6539
Type: Article
Appears in Collections:Published Articles, Dept. of Chemistry

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