Abstract
Reaction of the Schiff base ligand (E)-1-((p-tolylimino)methyl)naphthalen-2-ol (HL) with nickel(II) and copper(II) acetate provides the bis[1-((p-tolylimino)methyl)naphthalen-2-olato-κ2N,O]Ni and Cu(II) complexes (1 and 2), respectively. X-ray structure determinations reveal coordination of two N,O-chelate Schiff base ligands to the metal ion in a square-planar geometry for both the complexes. The phase purity of bulk microcrystalline samples is confirmed by Powder XRD patterns. The solid-state magnetic moment (µeff = 2.73 (1) and 2.06 µB (2)) indicates paramagnetic nature of the complexes. Thermal analyses by differential scanning calorimetry (DSC) and polarizing light microscopic (PLM) observations suggest mesomorphic property for 2. Cyclic voltammograms recommend a quasi-reversible two one electron charge transfer processes for 2 in dimethylformamide. Geometry optimization and excited state properties by DFT/TD-DFT calculations reproduce the experimental bond distances and angles as well as the experimental electronic spectra.
Published Version
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