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- Monosubstituted Imidazolium-Based Ionic Liquids
Among the numerous imidazolium-based ionic liquids, monosubstituted imidazolium-based ionic liquids have relatively few applications. The reason is that the stability of the monosubstituted imidazole ring is not high, and the hydrogen on the nitrogen is easily affected by the environment. Moreover, the introduced groups are limited, and the controllability is not strong. However, monosubstituted imidazolium-based ionic liquids also have an irreplaceable position. First of all, its steric hindrance effect is small and the hydrogen bond effect is strong, and it can be used as a reaction medium in organic synthesis. Secondly, it has strong coordination ability and can be used for separation and purification. Finally, it has a lower viscosity and can be used as an electrolyte.
Figure 1. The general structural formula of monosubstituted imidazolyl cations
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