AN NOVEL ANTIBACTERIAL ACTIVE [CuII–GdIII] COMPLEX CONSTRUCTED FROM AN ASYMMETRIC SALAMO-BASED LIGAND: SYNTHESIS AND STRUCTURAL CHARACTERIZATION

In the present study, we describe a reaction of Cu(OAc) 2· H 2 O and Gd(NO 3 ) 3· 6H 2 O with equimolar amounts of the asymmetric salamo-type ligand 6-methoxy-6′-ethoxy-2,2′-[ethylenedioxybis(azinomethyl)]diphenol (H 2 L) generated by Schiff base condensation of 2-[ O -(1-ethyloxyamide)]oxime-3-methoxy-phenol with 3-ethoxysalicylaldehyde to obtain a novel 3 d –4 f hetero-polynuclear complex [{Cu(L)Gd(NO 3 ) 3 } 2 ] [Cu(L)Gd(NO 3 ) 3 ] 2 . The complex is fully characterized by X-ray diffraction (XRD), elemental analyses, FTIR and UV-Vis spectra. The phase purity is clearly confirmed by powder XRD. In the [Cu II –Gd III ] complex, the coordination environments of Cu II ions are different, but the apical coordination atoms to the Gd III ions are nearly identical. The antibacterial and fluorescent properties of the H 2 L ligand and the [Cu II –Gd III ] complex are also investigated. Supramolecular interactions are studied in detail.