Oxovanadium (IV) Schiff base complexes encapsulated in the nanocavity of zeolite-Y: Efficient catalysts for the heterogeneous reduction of aldehydes

Oxovanadium(IV) complexes of Schiff base ligands derived from 2,4-dihydroxy acetophenone and 2,2'-dimethylpropelenediamin (for H2L1) or 1,2-diaminopropane (for H2L2) have been encapsulated in the nano-pores ofzeolite-Y by flexible ligand method and characterized by X-ray diffraction patterns and TGA analyses.These encapsulatedcomplexes catalyze the reduction of aldehyde with NaBH4. Excellent selectivity (100%) for alcohol formation in thepresence of VOL1-Y as catalyst was obtained in the case of 4-methylbenzaldehyde.

Keywords:

Zeolite , Nanostructures , Encapsulation , X-ray diffraction topography , Reduction