Synthesis, spectroscopic, electrochemical, thermal and antimicrobial studies of Ni(II), Zn(II), Cu(II) and Co(II) metal complexes of novel bidentate schiff base ligand

New Schiff base was synthesized from condensation of anthracene-10-carbaldehyde with 4-amino-3-mercapto-1,2,4-triazin-5(4H)-one. Resulted azomethine was characterized via elemental analysis, infrared and H-1-NMR spectroscopy. Thereafter, novel Schiff base complexes with Co(II), Ni(II), Zn(II) and Cu(II) metals were prepared and characterized by analytical, conductivity data, proton-NMR, IR, UV-Visible, ESR and fluorescence spectroscopy, magnetic moment as well as cyclic voltammetry. These physicochemical techniques suggest monobasic bidentate behaviour of ligand towards metal ions. Thermal stability and degradation kinetics have been studied using thermogravimetric techniques and some other thermal parameters are also reported. All the complexes exhibit octahedral geometry except copper complexes which show square planar arrangement around the metal centre. Low conductivity data of all compounds reveal their neutral and non-electrolytic character. Antimicrobial potentials of Schiff base and its metal chelates were evaluated against wide spectrum of bacterial cultures such as P. aeruginosa, S. aureus, B. subtilis, E. coli and fungi like A. niger and A. flavus.

Automated summary

A new Schiff base and its metal complexes have been synthesized and characterized using various spectroscopic techniques. The thermal stability and antimicrobial activity of these compounds have also been studied and reported.