Abstract
A series of novel bivalent metal complexes M(L1)2 and M(L2)2 where M = Cu(II), Ni(II), Co(II) and L1 = 2-((benzo [d] thiazol-6-ylimino)methyl)-4-bromophenol [BTEMBP], L2 = 1-((benzo [d] thiazol-6-ylimino)methyl) naphthalen-2-ol [BTEMNAPP] were synthesized. All the compounds have been characterized by elemental analysis, SEM, Mass, 1H NMR, 13C NMR, UV–Vis, IR, ESR, spectral data and magnetic susceptibility measurements. Based on the analytical and spectral data four-coordinated square planar geometry is assigned to all the complexes. DNA binding properties of these complexes have been investigated by electronic absorption spectroscopy, fluorescence and viscosity measurements. It is observed that these binary complexes strongly bind to calf thymus DNA by an intercalation mode. DNA cleavage efficacy of these complexes was tested in presence of H2O2 and UV light by gel electrophoresis and found that all the complexes showed better nuclease activity. Finally the compounds were screened for antibacterial activity against few pathogens and found that the complexes have potent biocidal activity than their free ligands.
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Authors express sincere thanks to the Head, Department of Chemistry for providing the necessary facilities, the Director, CFRD, Osmania University, Hyderabad, the Director, IICT, Hyderabad, and the SAIF, IIT Bombay for providing spectral and analytical data. We are also thankful to CSIR, New Delhi, DST-SERB and UGC-UPE (FAR) for providing financial assistance.
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Vamsikrishna, N., Kumar, M.P., Tejaswi, S. et al. DNA Binding, Cleavage and Antibacterial Activity of Mononuclear Cu(II), Ni(II) and Co(II) Complexes Derived from Novel Benzothiazole Schiff Bases. J Fluoresc 26, 1317–1329 (2016). https://doi.org/10.1007/s10895-016-1818-z
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DOI: https://doi.org/10.1007/s10895-016-1818-z