Antimicrobial and DNA cleavage studies of new N_2O_2 diazadioxa macrocyclic schiff base Co(II), Ni(II) and Cu(II) complexes containing triazole head unit: Synthesis and spectroscopic approach

摘要

A novel series of N_2O_2 diazadioxa macrocyclic complexes [MLCl_2] (M=Co~(2+), Ni~(2+) and Cu ~(2+)) have been synthesized with newly derived biologically active ligands (L~I-L~(IV)). These ligands were synthesized by the condensation of 1, 6-bis(2-formylphenyl)hexane and 3-subtituted-4-amino-5- hydrazino-1, 2, 4-triazole. The mode of bonding and overall geometry of the complexes have been inferred through IR, EPR, electronic spectral studies, conductivity, magnetic, thermal and electrochemical studies. All the complexes are soluble in DMF and DMSO and are non-electrolytes. All these complexes have been screened for their antibacterial (Escherichia coli, Staphylococus aureus, Salmonella typhi, Pseudomonas aeruginosa) and antifungal activities (Aspergillus niger, Aspergillus flavus and Cladosporium) by the MIC method. The DNA cleavage study was done by Agarose gel electrophoresis.