Amino functionalized bipyridine–heteropolyacid ionic hybrid: A recyclable catalyst for solvent-free oxidation of benzyl alcohol with H2O2

A new amino-functionalized bipyridine–heteropolyacid ionic hybrid was prepared by protonating and anion-exchanging the amino-attached bipyridine ionic liquid with phosphotungstic acid, and characterized by FT-IR, 1H NMR, UV–vis, XRD, SEM, TG, BET surface area, melting point, and elemental analysis. Its catalytic activity was evaluated in the oxidation of benzyl alcohol with aqueous H2O2. The hybrid catalyst is proved to be a highly efficient solid catalyst for solvent-free oxidation of benzyl alcohol with H2O2, which is featured by the fast reaction rate, high conversion and selectivity, easy recovery, and quite steady reuse.

The amino-functionalized bipyridine–heteropolyacid ionic hybrid is a highly efficient heterogeneous catalyst for solventless H2O2-based oxidations of alcohols, adding advantages of fast reaction rate, easy recovery, and quite steady reuse.Figure optionsDownload high-quality image (101 K)Download as PowerPoint slideHighlights
► A new ionic hybrid is prepared with amino functionalized bipyridine and heteropolyacid.
► The hybrid catalyst leads to the heterogeneous solventless oxidation of alcohols with H2O2.
► The hybrid catalyst gives high conversion and selectivity.
► The catalyst shows fast reaction rate, easy recovery, and steady reuse.