U Sani

TL;DR: A tridentate ligand N−(2−hydroxybenzylidene)pyridine-2−amine has been prepared by condensation of salicylaldehyde and 2−aminopyridine in absolute ethanol as discussed by the authors.

Abstract: Transition metal complexes of Co(II) and Ni(II) with Schiff base ligand (HL) derived from condensation of 2- hydroxy-1-naphthaldehyde and hydrazine monohydrate were successfully synthesized and separated. The Schiff base ligand and the metal (II) complexes prepared were characterized by melting point/decomposition temperature, solubility, conductivity, FT-IR spectra and elemental analysis results. IR spectra of the free ligand showed a band at 1655cm -1 which is assigned to the (-C=N-) stretching vibration of the azomethine. This band was observed at lower frequencies in the spectra of the metal (II) complexes which indicate complexation. Low (5.00 – 7.00Ohm -1 cm 2 mol -1 ) conductivity measurement obtained showed that the complexes are non electrolyte while elemental analysis result revealed 1:1 Metal-Schiff base ratio. The in vitro antimicrobial assay showed that the compounds are active against most of the bacterial isolates (E. coli, Kleb pneumonia, P. mirabilis, P. aeruginosa, and S. aureus ) as well as fungal isolates ( C. albicans, F. solani, A. and fumigates ). Antioxidant activity of the phenolic Schiff base against 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radicals was ascertained by employing probit analytical method using SPSS 16.0 software. The IC 50 for the phenolic Schiff base revealed its promising use as an antioxidant. Keywords : Antioxidant, Complex, DPPH, Schiff base, 2-hydroxy-1-naphthaldehyde

TL;DR: In this paper, a ligand, N, N'- bis(2 - hydroxyl - 1 - naphthalyl)propylenediimine was prepared from the reaction of 2-hydroxy- 1 -naphthaldehyde and propylenediamine, and its divalent metal complexes were screened for their antibacterial activity against E. coli, Kleb, proteus and Salm.

TL;DR: Schiff base ligands derived from 2-hydroxy-1-naphthaldehyde and some aliphatic diamines were synthesized and characterized in this article and each of the ligands was used to form complex with Mn (II).