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Electrical Conductivity of Seven Binary Systems Containing EMIM-Alkyl Sulfate Ionic Liquids with Water or Ethanol at Four Temperatures.
MedLine Citation:
PMID:  23301957     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
We present experimental measurements of specific electrical (or ionic) conductivity of seven binary systems of 1-ethyl-3-methyl imidazolium alkyl sulfate (EMIM-CnS) with water or ethanol. Electrical conductivity was measured at 298.15 K in all range of concentrations, and selected mixtures also at 288.15 K, 308.15 K and 318.15 K. The alkyl chain of the anions used are ethyl (EMIM-ES), butyl (EMIM-BS), hexyl (EMIM-HS) and, only for mixtures with ethanol, octyl (EMIM-OS). Let us note that the four ILs measured are miscible in water and ethanol at those temperatures and atmospheric pressure in all range of concentrations, but EMIM-OS jellifies for a given range of concentration with water. We compare the measured data in terms of the alkyl chain length and solvent nature. Data are compared with previously scarce results for these same systems, and also for other aqueous and ethanol mixtures with ILs. In addition, we verify that our data fits the universal theoretical expression with no fitting parameters given by pseudolattice based Bahe-Varela model, except for IL concentrated mixtures. To fit well all range of concentrations, we add to the original equation two phenomenological terms with one fitting parameter each. Finally, we calculate the molar conductivity and fit it successfully with an expression derived from Onsager theory.
Authors:
Esther Rilo; Juan Vila; Sandra García-Garabal; Luis Miguel Varela; Oscar Cabeza
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-10
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  -     ISSN:  1520-5207     ISO Abbreviation:  J Phys Chem B     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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