Biological and electrochemical studies of Co2+, Ni2+, Cu2+, Zn2+ and Cd2+ metal complexes of Schiff base ligand derived from 4-amino benzoic acid and isonicotinic hydrazide

Synthesis, Spectral Characterization, and Antimicrobial Activity of Two Novel Schiff Bases Derived from Thiosemicarbazide and Mononuclear 3d Transition Metal Complexes

“…FT-IR Spectroscopy (cm -1 ); 3402.21, 3283.77 they obtained stretching frequency at 1684.38 which is basically responsible for the conformation of Schiff base (stretching-C=N-imino), lowing of this transition because of the presence of Thio and methoxy electron-withdrawing groups.The IR spectra of Schiff base ligand (KL -1 ) shows strong band at 3402. 21 26 . Here we are using a conventional method which is to report an effectual practical technique (reflux) for the synthesis of a Schiff base (Scheme 1).…”

Novel cadmium (II) N2O2‐Schiff base compounds: X‐ray crystal structure, Hirshfeld surface study, thermal behavior, antimicrobial, DNA cleavage power, antioxidant, and cytotoxicity activity

“…The observed redshift is powerful evidence to confirm the binding of the Schiff base ligand via iminic nitrogen atoms to cadmium (II) center. 30,64 Moreover, according to the CdL (SCN) 2 , CdL (NO 3 ) 2 , and CdL(N 3 ) 2 compounds spectra, appearance of strong absorption bands at 2104 (1,385, 1,511), and 2047 cm À1 certainly confirms coordination of s-SCN À , ONO 2 À , and N 3 À anions to cadmium (II) ion, respectively. 65 Finally, the weak peaks observed in the regions of 524-584 cm À1 in the IR spectra of the cadmium coordination compounds may be assigned to M-O and M-N bonds, 26,66 respectively.…”

“…DNA cleavage results were observed under UV light and photographed. (10,20,30,40, and 50 μg/ml in DMSO as a solvent) were added to the wells. Then the final volume of the wells was increased to 200 μl using a cell culture medium so that in all treatments, the DMSO concentration reached 1% of the total volume of the medium.…”

“…Among the tetradentate Schiff bases ligands, the N 2 O 2 ones have attracted more attention due to their potentials to form metal compounds of first to third metal ions of periodic tables with unusual configurations and structural stability. [23][24][25][26][27][28][29][30] A literature survey on the reports about the group XII metal compounds shows that, although elemental cadmium may pollute the environment but various stable cadmium (II) Schiff base compounds [31][32][33] have been synthesized showing numerous properties including corrosion inhibition, 34 fluorescence, 35 photoluminescence, 36 antioxidant, 37 antimicrobial, 17,18,38,39 and anti-cancer 40 activities. Due to these notable properties, the research on newly synthetic cadmium coordination compounds and screening them, especially in biological application point of view is in demand yet.…”

“…Depending on the donor atoms, Schiff bases can be pointed out as bidentate (NN and NO), tridentate (NNN, NNO, ONS, or NNS), and tetradentate (NNNN, N 2 O 2, and N 2 OS) ligands. Among the tetradentate Schiff bases ligands, the N 2 O 2 ones have attracted more attention due to their potentials to form metal compounds of first to third metal ions of periodic tables with unusual configurations and structural stability 23–30 . A literature survey on the reports about the group XII metal compounds shows that, although elemental cadmium may pollute the environment but various stable cadmium (II) Schiff base compounds 31–33 have been synthesized showing numerous properties including corrosion inhibition, 34 fluorescence, 35 photoluminescence, 36 antioxidant, 37 antimicrobial, 17,18,38,39 and anti‐cancer 40 activities.…”