- P-ISSN 1225-0163
- E-ISSN 2288-8985
Mononuclear schiff base ligand N,N'-bissalicylidene-1,2-phenylenediamine(BSPD) and binuclear schiff base ligands N,N',N',N'''-tetrasalicylidene-3,3',4,4'-tetraaminodiphenyl-methane (TSTM), N,N',N'',N'''-tetrasalicylidene-3,3'-diaminobenzidine (TSDB) have been synthesized. Proton dissociation constants of the ligands were determined by potentiometric method. The synthesized ligands and complexes formed with Cu(II) ion. These complexes were investigated by cyclic voltammetry and differential pulse voltammetry. The results revealed two step diffusion controlled redox process. The mononuclear complex Cu(II)-BSPD and binuclear complexes <TEX>$Cu(II)_2$</TEX>-TSDB and <TEX>$Cu(II)_2$</TEX>-TSTM were used in the oxidation reaction of ascorbic acid. The reaction rates were in the order of <TEX>$Cu(II)_2$</TEX>-TSTM><TEX>$Cu(II)_2$</TEX>-TSDB>Cu(II)-BSPD, indicating that the binuclear <TEX>$Cu(II)_2$</TEX>-TSTM complex had the fastest values.