Recent application of heteropolyacid-based ionic liquid catalysts

Heteropolyacid-based ionic liquids (HPAILs) have garnered a lot of attention over the past ¿several decades because of their peculiar physicochemical properties as catalysts. In the first ¿place, their Bronsted acidity is so high that it borders on the superacid zone. Secondly, they are ¿powerful catalysts that undergo fast redox changes even at room temperature. Their intricate ¿structure or component elements can be modified to achieve the same size, charge density, redox ¿potential, acidity, and solubility. Finally, their catalytic activity is stable after being utilized at ¿substoichiometric concentrations. It is considered that these elements are related to the ¿economy, the environment, and the ability to adapt. Because of this, we want to compile a ¿review article covering the history of HPAIL synthesis and its many variations, as well as any ¿new developments.