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Compound (1), which consists of an oxine and a pyridinium group, was synthesized as a metal-responsive DNA binding ligand. Two 1s coordinate to a Cu(II) to form a stable dimer (1 2 –Cu), even in the presence of DNA. The binding of 1 with sonicated calf thymus DNA was enhanced by ca. 10 3 times after forming the dimer; the binding constants were estimated to be 3.2×10 4 M ...
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