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Articles

Syntheses, crystal structures, and antimicrobial activities of tetranuclear Ni4 and Ni2Zn2 complexes derived from tetradentate Schiff bases

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Pages 3127-3139 | Received 06 Oct 2021, Accepted 17 Dec 2021, Published online: 07 Jan 2022
 

Abstract

Two new homo-tetranuclear nickel(II) complexes, [Ni4(L1)4(CH3OH)4] (1) and [Ni4(L2)4(CH3OH)4] (2), and two new hetero-tetranuclear nickel(II)-zinc(II) complexes, [Ni2Zn2I2(L1)2(μ1,1-N3)2]CH3OH (3) and [Ni2Zn2Cl2(L2)2(μ1,1-N3)2]H2O (4), where L1is the deprotonated form of 4-tert-butyl-2-(3-ethoxy-2-hydroxybenzylideneamino)phenol (HL1) and L2 is the deprotonated form of 4-tert-butyl-2-(2-hydroxy-3-methoxybenzylideneamino)phenol (HL2), have been synthesized. Structures of the complexes were characterized by elemental analysis, IR and UV-Vis spectroscopy, and single crystal X-ray diffraction. The Ni ions in the complexes are in octahedral coordination, and the Zn ions are in distorted square pyramidal coordination. The compounds were evaluated for their antibacterial (Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Pseudomonas fluorescens) and antifungal (Candida albicans and Aspergillus niger) activities by the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) method.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by the high level cultivation project of Liaoning Normal University (grant number GD19L005).

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