Binuclear schiff base complexes of nickel(II) or copper(II) linked by dithiols as a bridging group

Binuclear Schiff base complexes of nickel(II) or copper(II) were synthesized by bridging unsymmetrical Schiff base complexes of nickel(II) and copper(II) with 2,5-dimercapto-1,3,4-thiadiazole or 2-mercaptoethyl ether.Although the magnetic susceptibility and ESR measurements showed that copper(II)copper(II) interaction of the binuclear copper(II) complexes is very weak in the solid state, they catalyzed chemiluminescence of luminol by hydrogen peroxide in DMF solution, suggesting that small amounts of the complexes might be present in the form of the appropriate copper(II)copper(II) distance to activate hydrogen peroxide in solution.