By [2+2] Schiff base condensation of 5-bromo-2-methoxylbenzene-1, 3-dicarboxaldehyde with diethylenetriamine, a new hexaaza 24-membered macrocyclic ligand was obtained, which formed a macrocyclic binuclear copper (I) complex in the presence of [Cu.(CH3CN)4]ClO4. When the copper(I) complex was oxidized in air or oxygen, a new macrocyclic binuclear copper(II) complex was obtained. The copper(II) complex was characterized by several methods and its oxidized products was characterized by 1H NMR. The results show that during oxidation, a methoxyl group in the ligand ring broke, and the phenoxy- and water-bridged Cu(II) complex formed. In oxidation of monooxygenase such as ligninase, oxidative demethylation also happened. Therefore this work mimicked this process for the first time by using macrocyclic complex. The quantity of absorbed oxygen and the absorption rate of oxygen were determined.

Key words: BENZALDEHYDE P, CONDENSATION REACTION, NITROGEN HETEROCYCLICS, COPPER COMPLEX, PROTON MAGNETIC RESONANCE SPECTROMETRY, METHOXY GROUP