Synthesis, spectroscopic characterization and antimicrobial studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes with Schiff bases derived from 5-bromo-salicylaldehyde

Crystal structures, spectroscopic, electrochemical, and antibacterial properties of a series of new copper(II) Schiff base complexes

“…In our previous studies on the biological activities of the transition metal Schiff base complexes, we found that the presence of more electronegative substituents on the ancillary ligand increased the antibacterial activity of their corresponding complexes. Similar results have also been reported by other researchers [33,34]. Hence, we synthesized a series of Schiff base ligands with more electronegative substituents.…”

“…The study of the antibacterial properties of Schiff bases and their metal complexes has attracted interest [33][34][35][36][37][38][39]. In our previous studies on the biological activities of the transition metal Schiff base complexes, we found that the presence of more electronegative substituents on the ancillary ligand increased the antibacterial activity of their corresponding complexes.…”

Mononuclear Cu(II) complexes of novel salicylidene Schiff bases: synthesis and mesogenic properties

“…The signals with a value at 8.62 ppm for 1 (see SI in Figure S1) and 8.52 ppm for 2 (see SI in Figure S3), respectively, belong to δ(HC=N) and are well within the range expected for imine compounds. [18] The signals at 13.22 ppm (for 1) and 13.68 ppm (for 2) are attributed to phenolic protons. In the 13 C-NMR spectrum, the signal due to the azomethine carbon atom was observed at 161.6 ppm (for 1) (see SI in Figure S2) and 161.6 ppm (for 2) (see SI in Figure S4), respectively.…”

Synthesis, Characterization, Antibacterial and DNA Binding Studies of Mn (II) Complex of 3-(2-(2-Hydroxy-3- Methoxybenzylidene) Hydrazinyl) Quinoxalin-(1H)-One

“…Transition metal complexes of Schiff base ligands are known for their potential applications in antibacterial, antifungal, magnetic, photoluminescent and DNA binding properties [1][2][3][4][5][6][7][8][9][10][11]. During recent years, quinoxaline based Schiff bases emerged as an important class of ligands and formed metal complexes with a broad spectrum of biological activity [12][13][14][15][16][17].Owing to the significant chemical, catalytic and biological activities of the Schiff base complexes, the present communication reports the synthesis, characterization and biological activity of Mn (II) complex of the Schiff base ligand, 3-(2-(2-hydroxy-3-methoxybenzylidene) hydrazinyl) quinoxalin-2(1H)-one (VHQO).…”