Photoreduction of the mono(2,9-dimethyl-1,10-phenanthroline) copper(II) cation in methanolic media

Intramolecular electron transfer in Cu(ii) complexes with aryl-imidazo-1,10-phenanthroline derivatives: experimental and quantum chemical calculation studies

First observation of Cu(ii)–Cu(i) autoreduction in complex with aryl-imidazo-1,10-phenanthroline derivatives.

Syntheses and copper(ii)-dependent DNA photocleavage by acridine and anthracene 1,10-phenanthroline conjugate systems

We report the syntheses and characterization of a series of compounds based on 1,10-phenanthroline covalently tethered, at the 2 and 9 positions, to either two benzene, naphthalene, acridine or anthracene chromophores. The acridine and anthracene derivatives are shown to efficiently cleave pUC19 plasmid DNA upon irradiation with ultraviolet light (pH = 7.0, 22 degrees C, 350 nm). Furthermore, photocleavage levels are markedly increased by the addition of Cu2+ to the DNA photolysis reactions. Interestingly, when the concentrations of the anthracene compounds are lowered from 35 microM to 0.25 microM, the reverse trend is observed. DNA photocleavage is markedly reduced in the presence of copper(II).