TITLE:
Preparation, Characterization and Antimicrobial Studies of Mn(II) and Fe(II) Complexes with Schiff Base Ligand Derived from 2-aminophenol and 3-formyl-2-hydroxy-6-methoxyquinoline
AUTHORS:
Abubakar Muhammad Jabbi, Habu Nuhu Aliyu, Sulaiman Isyaku, Abdullahi Muhammad Kabir
KEYWORDS:
Metal(II) Complexes, Schiff Base, Antibacterial and Antifungal Studies
JOURNAL NAME:
Open Journal of Inorganic Chemistry,
Vol.10 No.2,
April
30,
2020
ABSTRACT: Schiff
base derived from 2-aminophenol and 3-formyl-2-hydroxy-6-methoxyquinoline and
its Mn(II) and Fe(II) complexes were synthesized and characterized by melting
point and decomposition temperature, elemental analysis, molar conductivity, infrared
(IR) spectral analysis, atomic absorption spectroscopy (AAS) analysis,
solubility test, and magnetic susceptibility. The Fourier-transform infrared
spectroscopy (FTIR) spectral data of the Schiff base determined showed a band at 1622 cm−1 and this was
assigned to the v (C=N), which is a feature of azomethine group. The
same band was observed to shift to lower frequencies 1577 and 1599 cm−1 in the complexes suggesting coordination of the Schiff base with the respective
metal(II) ions. Molar conductance
values 14.58 and 12.65 Ω−1∙cm2∙mol−1 show that
the metal complexes were non-electrolyte in nature. The magnetic susceptibility
of the complexes was determined and the gram magnetic susceptibility of the
complexes was found to be positive, revealing that they are paramagnetic. The
elemental analysis of the complexes for C, N and H determined suggested 1:1
metal to ligand ratio. The result of the antimicrobial studies showed that, the
metal(II) complexes exhibited better antibacterial and antifungal activity than
the Schiff base.