Control of Photoinduced Electron Transfer from Zinc-Porphyrin to Methyl Viologen by Supramolecular Formation between Monoclonal Antibody and Zinc-Porphyrin |
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| Authors: | Akira Harada Hiroyasu Yamaguchi Kazutake Okamoto Hiroyuki Fukushima Keizou Shiotsuki Mikiharu Kamachi |
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| Institution: | Department of Macromolecular Science, Graduate School of Science, Osaka University, Japan. harada@chem.sci.osaka-u.ac.jp |
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| Abstract: | Photoinduced electron transfer from tetrakis(4-carboxy-phenyl porphyrin)-zinc complex (Zn-TCPP) to an acceptor molecule (methyl viologen; MV2+) has been found to be controlled by the complex formation of monoclonal antibody 03-1 for the porphyrin (TCPP) and Zn-TCPP. Although there are no ground-state interactions between Zn-TCPP and MV2+ for a 2:1 complex of antibody 03-1 and Zn-TCPP, the fluorescence of Zn-TCPP is quenched by the addition of MV2+. The Stern-Volmer plots and emission lifetime studies show that there is a long-range electron transfer through the antibody 03-1. |
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