Preparation and characterization of a novel host (zeolite NaY)/guest (copper(Ⅱ) complex of a new bidentate Schiff base ligand) nanocomposite material (HGNM): a comparison between catalytic reactivity of free and encapsulated complexes in oxidation of benzyl alcohol and aldol condensation

摘要

A copper(Ⅱ) complex of 4-((E)-(4-(1H-benzo[d]imidazol-2-yl)phenyl)diazenyl)-2-((E)-(4-hy-droxyphenylimino) methyl)phenol (HL) was encapsulated in zeolite NaY by flexible ligand method. The structure of encapsulated complex was characterized by spectroscopic (electronic and FT-IR), XRD, TGA, BET and elemental analysis data. Furthermore, catalytic activity of the neat and encapsulated complexes was studied in oxidation of benzyl alcohol and aldol condensation. The encapsulated complex was more reactive and stable than the corresponding free complex. Nanocomposite material was enough stable to be reused for several times. Finally, the reaction parameters were optimized for oxidation of benzyl alcohol and aldol condensation.