Synthesis and Properties of Room‐Temperature Choline Carboxylate Zwitterionic Ionic Liquids as Potential Electrolytes
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>Choline carboxylate zwitterions were prepared by two different synthetic routes through esterification of choline salts with a range of anhydrides. Their conjugation with lithium bis(trifluoromethylsulfonyl)imide resulted in the formation of stable room‐temperature ionic liquids. In view of their use as potential electrolytes the physicochemical characterization of these attractive ionic liquids was performed. These compounds presented a glass transition temperature between −43 and −34 °C, good thermal stability up to 224 °C, densities above 1.44 g cm<jats:sup>−3</jats:sup> at 25 °C, and viscosities between 3.56 and 12.27 Pa s at 25 °C. In terms of conductivity the most promising ionic liquid showed an excellent conductivity between 8.66×10<jats:sup>−5</jats:sup> S cm<jats:sup>−1</jats:sup> at 25 °C and 1.80×10<jats:sup>−3</jats:sup> S cm<jats:sup>−1</jats:sup> at 90 °C. These zwitterionic ionic liquids maintained a liquid state, and no dissociation was observed even after six months of storage at room temperature.</jats:p>
収録刊行物
-
- ChemPlusChem
-
ChemPlusChem 77 (12), 1106-1111, 2012-11-19
Wiley
