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Updated: Jun 27, 2026

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
Published on: December 16, 2013
DNA binding and antimicrobial studies of polymer-copper(II) complexes containing 1,10-phenanthroline and
Rajendran Senthil Kumar1, Sankaralingam Arunachalam
1School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
Abstract:
Some water-soluble polymer-copper(II) complexes, [Cu(phen)(l-phe)(BPEI)]ClO(4).4H(2)O (phen=1,10-phenanthroline, l-phe=l-phenylalanine, and BPEI=branched polyethyleneimine), with various amounts of copper(II) chelates 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. Binding of these complexes with calf thymus DNA (CT DNA) has been investigated by absorption spectroscopy, emission spectroscopy and gel electrophoresis techniques. The experimental results indicate that the amount of copper(II) chelate content in the polymer backbone have marked effect on the binding affinity to CT DNA. Interactions like electrostatic interaction, van der Waals interaction, hydrogen bonding and/or partial intercalation binding modes exist in this system. A sample of polymer-copper(II) complex was tested for its antibacterial and antifungal activity against certain human pathogenic organisms and it was found to have good antibacterial and antifungal activities.
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