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Synthesis and DNA studies of a copper(II) complex of 5,6-dihydro-5,6-epoxy-1,10-phenanthroline

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A new copper(II) complex, [Cu(epoxy)(phen)(NO3)](NO3)·H2O (epoxy = 5,6-dihydro-5,6-epoxy-1,10-phenanthroline, phen = 1,10-phenanthroline), has been synthesized and characterized by elemental analysis, IR and UV–vis spectroscopy, and single crystal X-ray diffraction. The complex crystallized in a monoclinic system with space group P21/n, a = 13.3199(8) Å, b = 11.2917(7) Å, c = 16.0832(9) Å, α = 90°, β = 107.827(4)°, and γ = 90°. The complex cation possesses a distorted octahedral geometry, with Jahn–Teller distortion occurring in the CuN4O2 core. The binding interaction with calf thymus DNA (CT–DNA) was investigated by UV–vis and fluorescence spectroscopy, cyclic voltammetry, and viscometry. The results support a partially intercalative binding mode. Efficient cleavage of plasmid DNA by the complex was observed by gel electrophoresis.
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Keywords: DNA binding; DNA cleavage; Epoxy-phenanthroline; Fluorescence; Six-coordinate copper(II)

Document Type: Research Article

Affiliations: Department of Chemistry, Thiruvalluvar University, Vellore, India

Publication date: December 17, 2015

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