Abstract
We demonstrate the infiltration of ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate) skeleton within robust Co metal loaded mesoporous zeolites viz. Co/ZSM-5 and/or Co/HY to prepare the ([BMIM]BF4@Co/ZSM-5) and/or ([BMIM]BF4@Co/HY) host–guest systems and characterized by various physico–chemical techniques. The catalytic activity of these catalysts was investigated in the liquid phase Baeyer–Villiger (BV) oxidation of cyclohexanone under solvent-free condition. Amongst them, [BMIM]BF4@Co/HY was found to be potential candidate by showing excellent performance with 54.88% conversion of cyclohexanone and 86.36% e-caprolactone selectivity with elevated TOF and TON values of 4312.43 h−1 and 25874.58, respectively. In addition to this, the host–guest system could be successfully recycled six times without significant loss of activity.
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