Ionic liquids based on imidazolium, ammonium and pyrrolidinium salts of the dicyanamide anion
Top Cited Papers
- 29 July 2002
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Green Chemistry
- Vol. 4 (5) , 444-448
- https://doi.org/10.1039/b205641k
Abstract
New families of salts, based on quaternary ammonium, 1-methyl-3-alkylimidazolium or N-methyl-N-alkylpyrrolidinium organic cations together with the dicyanamide (dca, N(CN)2 −) anion are reported. The salts are low melting compounds, all those reported are liquid at room temperature, for example 1-methyl-3-ethylimidazolium dicyanamide (mp −21 °C) and N-methyl-N-ethylpyrrolidinium dicyanamide (mp −10 °C). Some of the salts exhibit multiple crystalline phases below their melting points. Above their melting points they are stable to at least 200 °C. Many of the salts were found to be glass forming when cooled rapidly to −100 °C. The room-temperature liquids exhibit very low viscosities, for example ethylmethylimidazolium dicyanamide: η = 21 cP at ambient temperature (25 °C).Keywords
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