Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of Tehran Analytical and Bioanalytical Electrochemistry - 12 7 2020 07 31 Synthesis, Characterization, Electrochemical and Antimicrobial Studies of N4-Macrocycles of Cobalt(II) and Nickel(II) Metal Ions 922 930 43501 EN Anuj Kumar Department of Chemistry, GLA University, Mathura, India Vinod Kumar Vashistha Department of Chemistry, GLA University, Mathura, India Saeed Ahmed Department of Chemistry, Hong Kong University of Science and Technology, Hong Kong Asif Ali Beijing University of Chemical Technology, China Dipak Kumar Das Department of Chemistry, GLA University, Mathura, India Journal Article 2020 06 04 The precise analysis of redox chemistry of MN₄-based macrocyclic complexes is of great importance because of stabilization of unusual oxidation states of metal ions by macrocyclic ligand and thus have various applications in biochemistry, electrochemistry, electrocatalysis, pharmaceuticals etc. In this work, MN₄-macrocyclic complexes of Co (II) and Ni(II) transition metal ions have been synthesized by using template condensation method. Further, the MN₄-macrocyclic complexes were characterized by elemental, molar conductance and multiple spectroscopic analysis. The spectral and elemental analysis suggested that both complexes would possess the saddle shape distorted octahedral geometry. Further, the electrochemical investigation of both complexes was carried out by cyclic voltammetry. Both complexes showed quasi-reversible one-electron transfer redox process indicating the stabilization of oxidation state of central metal ions. Moreover, the MN₄-macrocyclic complexes have shown to have good antimicrobial activity against the various pathogens such as Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa), Bacillus subtilis (B. subtilis) and Staphylococcus aureus (S. aureus). https://www.abechem.com/article_43501_edea466624e316fb14fd8bc274cdb051.pdf