- Functionalized Ionic Liquids
- Ester Functionalized Ionic Liquids
The ester group is introduced into the side chain of the cation of the ionic liquid to obtain an ester group functionalized ionic liquid. In ester functionalized ionic liquids, cations are introduced into the side chains of pyridine and imidazole nitrogen atoms from ester groups, and ionic liquids with different properties can be obtained by introducing ester chains of different chain lengths. When the anion is generally BF6- or PF6-, the ester-based functionalized ionic liquid has better stability. Ester functionalized ionic liquids have higher density, viscosity, glass transition temperature, lower acid value, and water absorption. The functionally changed properties of these ester groups make this ionic liquid widely used in the petrochemical industry.
Figure 1. Common structure of ester functionalized ionic liquids
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