An unsymmetrical ferrocenyl-substituted azine ligand and its Cu(II) complex have been prepared in this study. The redox active ferrocene-based azine ligand was obtained by condensation of 2-methanehydrazonoylphenol and ferrocenecarboxaldehyde. Structures of the ligand and its Cu(II) complex have been characterized by IR, UV-vis, NMR, X-ray, magnetic measurements and TG techniques. Redox behaviors of the ligand and its Cu(II) complex have been investigated by cyclic voltammetry. Structural parameters and spectroscopic properties of the azine ligand containing ferrocenyl unit and its Cu(II) complex were calculated by DFT and TD-DFT/CPCM methods and compared with the experimental results. (C) 2014 Elsevier B.V. All rights reserved.