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E-mail: vnnara@yahoo.co.inReceived January 28, 2011, Accepted March 30, 2011Six new binuclear copper(II) complexes have been prepared by template condensation of the dialdehydes 1,8-[bis(3-formyl-2-hydroxy-5-methyl)benzyl]-l,4,8,11-tetraazacyclotetradecane (PC-a) and 1,8-[bis(3-formyl-2-hydroxy-5-bromo)benzyl]-l,4,8,11-tetraazacyclotetradecane (PC-b) with appropriate aliphatic diamines, andcopper(II) perchlorate. The structural features of the complexes have been confirmed by elemental analysis, IR,UV-vis and mass spectra etc. The electrochemical behavior of all the copper(II) complexes show twoirreversible one electron reduction process. The room temperature magnetic moment studies depict thepresence of an antiferromagnetic interaction in the binuclear complexes. The catechol oxidation and hydrolysisof 4-nitrophenylphosphate were carried out by using the complexes as catalyst. The antimicrobial screeningdata show good results. The binding of the complexes to calf thymus DNA (CT DNA) has been investigatedwith absorption and emission spectroscopy. The complex [Cu

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New Unsymmetric Dinuclear Copper(II) Complexes of Trans-disubstituted Cyclam Derivatives: Spectral, Electrochemical, Magnetic, Catalytic, Antimicrobial, DNA Binding and Cleavage Studies