title: DNA binding and antimicrobial studies of polymer-copper(II) complexes containing 1,10-phenanthroline and L-phenylalanine ligands.
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.
authors.affiliation: School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
authors.forename: Rajendran Senthil
authors.initials: RS
authors.lastname: Kumar
authors.forename: Sankaralingam
authors.initials: S
authors.lastname: Arunachalam
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000737:chemistry*; D000935:Antifungal Agents / Q000737:chemistry / Q000494:pharmacology; D003300:Copper; D004247:DNA / Q000378:metabolism*; D006801:Humans; D008024:Ligands; D010618:Phenanthrolines; D010649:Phenylalanine; D011108:Polymers / Q000737:chemistry*; D012995:Solubility; D013057:Spectrum Analysis
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D000935:Antifungal Agents; D008024:Ligands; D010618:Phenanthrolines; D011108:Polymers; D010649:Phenylalanine; D003300:Copper; D004247:DNA; C427203:calf thymus DNA; C025205:1,10-phenanthroline