Assembly of Cu(II)-1, 10-phenanthroline and oxine complexes in supercages of Y zeolite and thier catalytic activity for phenol hydroxylation

(CAT) and hydroquinone (HQ) were mainly produced at higher temperatures (323-333 K), in contrast to the favorable obtainment of p-benzoquinone (PBQ) at lower temperatures (303-313 K). Both CuPhen/Y and CuOx/Y possessed higher activity in phenol hydroxylation, which might be assigned to the promoted effect of ligands, the fixation of Cu(II) active component inside the supercages of Y zeolite by the 1,10- phenanthroline and oxine complexes, and the chemical environment inside the framework of Y zeolite. Water should be selected as desirable solvent for hydroxylation of phenol into dihydroxybenzene.