Comparable ionicity of the solutions of aprotic and protic ionic liquids by anion substitution

TitleComparable ionicity of the solutions of aprotic and protic ionic liquids by anion substitution
Publication TypeJournal Article
Year of Publication2017
AuthorsJain, P, Kumar, A
JournalJournal of Solution Chemistry
Volume46
Issue6
Pagination1-13
Date PublishedJUN
Type of ArticleArticle
AbstractTemperature dependent molar conductances and fluidities of bisulfate and ethyl sulfate anion-based ionic liquids were measured. The extent of dissociation of the ionic liquids was estimated from the Walden plot in term of ionicity. The ionicity mainly depends on the magnitude of Coulombic forces, altered by the anion’s Lewis basicity. Aqueous solutions of aprotic ionic liquids, in general, possesses ionicity in the range of ≈70–99%. This article reveals that the substitution of the anion by bisulfate and ethylsulfate reduces the ionicity of aqueous solution of these ionic liquids to the range of 10–37%. This is very close to that exhibited by some of the protic ionic liquids and phosphonium based ionic liquids with sweetner anions. The concentration dependent molar conductance of these ionic liquids has been fitted to Mahiuddin and Ismail’s equation. To our surprise, the molar conductances of bisulfate-based aprotic ionic liquids are remarkably high, even though these ionic liquids possess lower ionicity.
DOI10.1007/s10953-017-0640-9
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)1.256
Divison category: 
Physical and Materials Chemistry

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