Novel iron and gallium salts of Aquivion® PFSA: Synthesis, characterization and some catalytic applications

• Synthesis and characterization of novel heterogeneous perfluorosulfonated salts.
• Application of these Fe and Ga salts as catalysts for Friedel–Crafts acylations.
• Use of these recyclable catalysts in substoichiometric amount.
• Preparation of some potentially industrially useful thiophene and indole products.
• “Greener and more sustainable” Catalysts synthesis and Friedel–Crafts applications.

The objective of this study was to prepare, characterize and test the catalytic properties of iron and gallium salts of Aquivion® PFSA (hereinafter Aquivion-H). The samples were characterized by the determination of metal loading in fresh and used materials, ATR-FTIR, and thermogravimetric analysis (TG-DSC). The salts were screened in Friedel–Crafts acylation of some heterocyclic compounds and compared with some homogeneous and heterogeneous Lewis acids as well as with pure Aquivion-H. These new salts revealed efficient catalytic activity and recyclability.

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