• Effect of perfluoroalkyl chains on the properties and phase equilibria FILs. VLE FILs show need optimal fluorine density to enhance gas absorption. LLE reveal high surfactant behavior in water improved PFCs solubility. SLE uncover formation eutectic mixtures with complex behavior. huge relevance GHGs capturing processes biomedical applications. Fluorinated ionic liquids (FILs) are defined as ...