Journal
JOURNAL OF INORGANIC BIOCHEMISTRY
Volume 102, Issue 2, Pages 234-241Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2007.08.005
Keywords
Polymer-copper(II) complex; 2,2 '-bipyridine; DNA binding; electrostatic interactions
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The water soluble polymer-copper(II) complex samples, [Cu(bpy)(2)(BPEI)]Cl-2 center dot 4H(2)O (bpy = 2,2'-bipyridine, BPEI = branched polyethyleneimine), with varying degrees of copper(II) chelates content in the polymer chain, were prepared by ligand substitution method in water-ethanol medium and characterized by Infra-red, UV-visible, EPR spectral and elemental analysis methods. The interaction of these polymer-copper(II)-bipyridyl complex samples with calf thymus DNA has been explored by using electronic absorption spectroscopy, emission spectroscopy and gel electrophoresis techniques. The observed changes in the physico-chemical features of the polymer-copper(II) complex on binding to DNA suggest that the complex binds to DNA with electrostatic interaction mode. A sample of polymer-copper(II) complex was tested for its antibacterial and antifungal activity and it was found to have good antibacterial and antifungal activities. (c) 2007 Elsevier Inc. All rights reserved.
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