A Ferromagnetically Coupled, Bent, Trinuclear Copper(II) Complex: Synthesis, Structure, Hydrogen-Bonding Network, Magnetic Properties and DNA Interaction Study

• Published in: European Journal of Inorganic Chemistry Vol. 2006; no. 17; pp. 3510 - 3516
• Main Authors: Sarkar, Sumana, Mondal, Amrita, Chopra, Deepak, Ribas, Joan, Rajak, Kajal Krishna
• Format: Book Review Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01-09-2006; WILEY‐VCH Verlag
• Subjects: Copper; DNA recognition; Hydrogen bonds; Magnetic properties; Reduced Schiff base
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.200600378

A bent trinuclear copper(II) complex (1) incorporating μ‐phenoxo, μ‐syn‐syn carboxylato, and μ3‐chloro bridges and an O,N,N‐coordinated reduced Schiff‐base ligand is reported. The complex shows an intramolecular ferromagnetic interaction in the solid state. The EPR spectra also support the magnetic behaviour of the complex. In the compound, each copper centre has a square‐pyramidal geometry. The separation between the adjacent copper ions is about 3.05 Å and that between the terminal copper ions is about 5.0 Å. The complex forms a supramolecular architecture through N–H···Cl hydrogen bonding between the amine group of the reduced Schiff‐base ligand and the counter chloride anions. Absorption and fluorescence spectral studies and viscosity measurements have been performed to determine the type of interaction with calf‐thymus DNA. The nuclease activity of the complex with plasmid DNA is also studied. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)