Four new task-specific ionic liquids based on the peroxydisulfate ion were synthesized by the ion exchange method and characterized by FTIR and 1 H NMR spectroscopy and elemental analysis. The physicochemical characteristics of these ionic liquids such as density, thermal stability, conduc-
A metal-free aerobic oxidation of benzylic alcohols to the corresponding benzylaldehyde derivatives was accomplished using proton ionic liquids (pyridium nitrate) as catalyst in a nonsolvent system with excellent conversion and selectivity. The catalyst could be recycled with no other polluted emission in this reaction procedure.
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