Abstract
Novel cyclen copper(II) complexes appending different side arms were synthesized as DNA cleavage agents. Both the intermediates and mononuclear complexes were characterized by 1H NMR, ESI-HRMS, Elemental analyses and IR, and their catalytic activities for DNA cleavage and DNA binding abilities were investigated. The results indicate that the copper(II) complexes could catalyze the cleavage of supercoiled DNA (pUC 19 plasmid DNA) under physiological conditions to produce nicked DNA with high yields (nearly 100%) via an oxidative mechanism in the absence of exogenous agents; The copper complex bearing an 9-anthryl group gave superior DNA interactions to those bearing phenyl or methyl groups.
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