Molecular assembly of Zn porphyrin complexes onto a gold electrode using synthetic light-harvesting model polypeptides |
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Authors: | Tsuyoshi Ochiai Tomoya Kato Takehisa Dewa Hideki Hashimoto |
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Affiliation: | a Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan b Department of Physics, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan |
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Abstract: | Molecular assembly of Zn porphyrin pigments, Zn substituted bacteriochlorophyll a ([Zn]-BChl a) and Zn mesoporphyrin monomer (ZnMPMME) on a gold electrode using synthetic 1α-helix hydrophobic polypeptides which have similar amino acid sequences to the hydrophobic core in the native photosynthetic light-harvesting (LH) 1-β polypeptide from Rhodobacter sphaeroides, has been achieved: this process is dependent on the structures of pigments and polypeptides. Interestingly, an enhanced photoelectric current was observed when ZnMPMME with the LH1 model polypeptide in an α-helical configuration was assembled onto the electrode. |
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