Abstract
Nickel(II) complexes of 12-membered macrocyclic ligands with different donating atoms (N2O2, N2S2 and N4) in the macrocyclic ring have been encapsulated in the nanocavity of zeolite-Y by the fexible-ligand method. Nickel(II) complexes with macrocyclic ligands were entrapped in the nanocavity of zeolite-Y by a two-step process in the liquid phase: (i) adsorption of precursor ligand; 1,2-di(o-aminophenyl-, amino, oxo, thio)ethane, N2X2; in the supercages of the Ni(II)–NaY, and (ii) in situ condensation of the Ni(II) precursor complex; [Ni(N2X2)]2+; with glyoxal or biacetyl. The new host–guest nanocatalysts (HGNM), [Ni([R]2-N2X2)]2+–NaY (R = H, CH3; X = NH, O, S), have been characterized by FT-IR, DRS and UV–Vis spectroscopic techniques, XRD and elemental analysis, as well as nitrogen adsorption, and were used for oxidation of cyclohexene with molecular oxygen.
Acknowledgement
Author is grateful to Council of University of Kashan for providing financial support to undertake this work.