Photoinduced reduction of methylviologen by ascorbate using chlorophyllin in liposome system.
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概要
- 論文の詳細を見る
Photoindeced electron transport across bilayer lipid membrane was studied, using chlorophyllin (Chln), a water-soluble derivative of chlorophyll. Photoreduction of methylviologen (MV<SUP>2+</SUP>) by ascorbate was observed only in the liposome system containing ascorbate in the internal aqueous phase and MV<SUP>2+</SUP> in the external aqueous phase. This suggests asymmetry of bilayer lipid membrane. This reaction rate was not affected by the addition of carbonyl cyanide <I>m</I>-chlorophenylhydrazone in the system buffered by tris(hydroxymethyl)aminomethane (Tris), but strongly affected by <I>N</I>-2-hydroxyethylpiperazine-<I>N</I>′-2-ethanesulfonic acid. In the system buffered by Tris, a proton carrier is not Chin having carboxyl groups but Tris possessing primary amine group. Replacement of the central Mg of Chin with Zn gives a higher rate of MV<SUP>2+</SUP> photoreduction, but when Cu was used in place of Zn, photoreduction was not observed. The central metal may affect the redox potential and the life time of excited Chln.
- 公益社団法人 日本化学会の論文
著者
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TODA Fujio
Department of Bioengineerig, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology
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Toda Fujio
Department of Chemical Engineering, Faculty of Engineering, Tokyo Institute of Technology
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Hidaka Seiji
Department of Synthetic Chemistry, Faculty of University of Tokyo
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Matsumoto Eizo
Department of Chemical Engineering, Faculty of Engineering, Tokyo Institute of Technology
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