A 1,2,3-triazolate lithium salt with ionic liquid properties at room temperature.

A triethylene glycol-based 1,2,3-triazolate lithium salt with ionic liquid properties at room temperature is synthesized in three steps including copper-catalysed cycloaddition between alkyne-functionalized monomethoxy-triethylene glycol and azidomethyl pivalate, followed by the deprotection of the methyl pivalate group and further lithiation of the 1H-1,2,3-triazole intermediate. The resulting lithium 1,2,3-triazolate is characterized by NMR spectroscopy, differential scanning calorimetry, thermogravimetric analysis, broadband dielectric spectroscopy, electrochemical impedance spectroscopy and cyclic voltamperometry. This approach provides new opportunities for the further development of highly functional molecular and macromolecular lithium salts.

Poly(vinyl ester 1,2,3-triazolium)s: a new member of the poly(ionic liquid)s family.

A vinyl ester monomer carrying a pendant 1,2,3-triazole group is synthesized in two steps and polymerized by cobalt-mediated radical polymerization. Subsequent alkylation with N-methyl bis[(trifluoromethyl)sulfonyl]imide affords the corresponding poly(vinyl ester 1,2,3-triazolium). This unprecedented example of poly(vinyl ester ionic liquid) exhibits an ionic conductivity of 9.2 × 10(-7) S cm(-1) at 30 °C.