Photoinduced electron transfer of zinc porphyrin electrostatically bound to DNA
نویسندگان
چکیده
Cationic zinc porphyrin, ZnTMAP4+, externally binds to calf thymus DNA or polynucleotides through electrostatic interactions in a self-stacked (for DNA or [poly(dA-dT)]2) or unstacked (for [poly(dG-dC)]2) form at low [porphyrin]/[base-pair] ratios. When ZnTMAP4+ in these conjugates was excited in the presence of a cationic electron acceptor, electron transfer (ET) occurred to produce the radical ion pairs. The ET rate and the decay dynamics of the radical ion pairs varied depending on the base composition in the polynucleotide.
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تاریخ انتشار 2002