4.6 Article

Physicochemical properties of imidazo-pyridine protic ionic liquids

Journal

JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 38, Pages 11570-11579

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta12022h

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Funding

  1. Natural Sciences and Engineering Research Council of Canada
  2. New Brunswick Innovation Foundation
  3. Canada Foundation for Innovation

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A new class of protic ionic liquids (PILs) were prepared by reacting imidazo-[1,2a]-pyridine (ImPr) with benzene-1,2-dithiol (BDT), oxalic acid (Ox), phthalic acid (Phth), pimelic acid (Pim), and sulfuric acid. [ImPr][HSO4] was determined to be the most thermally stable PIL with a decomposition temperature of 326 degrees C and could potentially be used as an electrolyte in fuel cells and lithium ion batteries. X-ray crystallography on oxidized [ImPr][BDT] indicated the formation of the first reported disulfide PIL. [ImPr][Pim] and [ImPr][Phth] showed fragile behaviour. A Walden plot indicated ionic behaviour close to ideal for [ImPr][Phth].

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