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- Hydroxyl Functionalized Ionic Liquids
Modifying the ionic liquid with hydroxyl as a functional group can increase the polarity of the ionic liquid and make it exhibit strong hydrogen bonds and surface tension. Hydroxy functionalized ionic liquid cations mainly include 1-hydroxyethyl-3-methylimidazole and hydroxyethyltrimethylammonium. The anions of hydroxyl functionalized ionic liquids mainly include Cl-, Br-, BF4- and so on. The introduction of hydroxyl groups in ionic liquids can increase the polarity and solvation effect of ionic liquids, and can replace traditional organic solvent alcohols in some fields. At the same time, the presence of hydroxyl will also affect the force between the solvent and the solute, enhance the activity of the enzyme, and improve the efficiency of the reaction. In the field of inorganic nanomaterials and electrochemistry, hydroxyl functionalized ionic liquids have also been widely used.
Figure 1. Common structure of hydroxyl functionalized ionic liquid
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