The 2,7-diazapyrenium dication (1) and the dimeric tetracation (2) bind to double strand supercoiled DNA pBR322 and effect efficient photocleavage under irradiation with visible light, (2) being more active than (1).
A. J. Blacker, J. Jazwinski, J. Lehn and F. X. Wilhelm, J. Chem. Soc., Chem. Commun., 1986, 1035 DOI: 10.1039/C39860001035
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