Abstract
The antibacterial mechanisms of Cu(phen)2Cl2·6H2O, [Cu(phen)(Gly)(H2O)]Cl·3H2O, [Cu(phen)(L-Ser)(H2O)Cl] (1,10-phenanthroline (phen)) on Escherichia coli were investigated. In the inductively coupled plasma atomic emission spectroscopy experiments, it showed that lipophilic phen ligand can cause elevation of intracellular copper, but intracellular copper is not the decisive factor. The UV-vis and gel electrophoresis experiments reveal that the DNA binding and cleavage activity are decisive factors for the antibacterial action of these compounds. It is revealed by the cyclic voltammetry experiments that the redox potential was bound to the cleave activity.
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