Synthesis and Chemical Structure Elucidation of Two Schiff Base Ligands, Their Iron(II) and Zinc(II) Complexes, and Antiradical, Antimicrobial, Antioxidant Properties

Synthesis, characterization and antioxidant activity of Schiff base and its metal complexes with Fe(II), Mn(II), Zn(II), and Ru(II) ions: Catalytic activity of ruthenium(II) complex

“…According to the ABTS assay, antioxidant capacity of a compound is based on measuring the reduction of ABTS •+ cation radicals [26,46]. It was observed that complexes of ligand had low ABTS •+ radical scavenging activity but parent ligand did not show significant ABTS •+ radical scavenging activity (Figure 1).…”

“…Antioxidant compounds cause the reduction of ferric ions (Fe 3+ ) to ferrous ions (Fe 2+ ), because of their reductive capabilities. Ferric reducing antioxidant powers of a com-pound can be measured by this transformation level [23,46]. According to the result of this study, the reducing power of standard antioxidants, ligand and its metal complexes were decreased in the following order: BHA > BHT >Ascorbic acid >Ru(II) complex > Zn(II) complex > Ligand > Fe(II) complex >Mn(II) complex, in presence of same concentration (30 μg/mL) of test sample.…”

Antimicrobial, antioxidant and DNA protective effects and phenolic content of Lallementia canescens (L.) Fisch. C.A.Mey. and Lallementia peltata (L.) Fisch. C.A.Mey

“…All data compared statistically were presented as Mean ± standard deviation and P values below 0.05 were considered significant. Fe 3+ cation reduction study was performed according to the FRAP method proposed by [33], and BHA, BHT, and α-Toc were used as standard antioxidants. Extracts and standards at different concentrations were added in test tubes and total volume was completed to 1 mL with the distilled water.…”

Thiophene‐containing compounds with antimicrobial activity

“…Another azomethine‐type ligand that has two thiophene rings in its structure and its Fe(II) and Zn(II) complexes 235 (Figure 28) were synthesized and evaluated as antimicrobial compounds against seven bacterial and three fungal strains at a concentration of 33 mg/ml in DMSO. [ 212 ] The ligand showed no antibacterial activity but exhibited a moderate anti‐ S. cerevisiae activity only when 80 μl of its solution was employed in the test, while the same diameter for the inhibition zone was obtained with only 60 μl of Fe(II) complex. No antifungal activity was noticed for the Zn(II) complex.…”