Synthesis, structure, physicochemical properties and catecholase-like activity of a new dicopper(II) complex

The synthesis, characterization and catecholase activity studies of the com plex [Cu-2(H(2)bbppnol)(mu -OAc)(mu -ClO4)]ClO4.H2O . EtOAc containing the dinucleating ligand N,N'-2-hydroxybenzyl-N,N'-2-pyridylmethyl-2-hydroxyprop ane-1,3-diamine (H(3)bbppnol) are presented here. The complex was character ized by IR, electronic and EPR spectroscopies, cyclic voltammetry, magnetic susceptibility measurements and X-ray crystallography. The catecholase-lik e activity of the complex was determined spectrophotometrically by monitori ng the oxidation of 3,5-di-tert-butylcatechol to the corresponding o-benzoq uinone in O-2-saturated methanol/aqueous buffer (pH 8) mixtures at 25 degre esC. The complex was able to oxidize the model substrate with a turnover nu mber of 0.0057 s(-1).