Add time:07/24/2019         Source:sciencedirect.com

The Schiff base methyl 2-pyridyl ketone semicarbazone (HL) was prepared from the condensation of methyl 2-pyridyl ketone and semicarbazide, and used in the synthesis of a series of novel binuclear Cu(II) complexes with three distinct bridging ligands: [Cu(L)(μ1,1-N3)]2 (1), [Cu(L)(μS,N-SCN)]2 (2) and [Cu(L)(Cl)]2 (3). The compounds were characterized by elemental analysis, IR and UV–Vis spectroscopy, and their solid-state structures have been established by single-crystal X-ray diffraction revealing the first binuclear complexes with the HL ligand. Supramolecular interactions invoving the adjacent complexes were studied in detail. The antimicrobial activity of HL and the complexes 1–3 was further investigated against the bacteria Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Erwinia carotovora and fungals Candida kefyr, Candida krusei and Aspergillus niger, with the complex 3 demonstrating enhanced activity relatively to the free ligand and remaining complexes.

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