Electrochemical and spectroelectrochemical of [5-phenyl-10,15,20-tris(4-sulfonatophenyl)porphinato]iron in aqueous solution.
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概要
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The equilibria among the species of [5-phenyl-10,15,20-tris(4-sulfonatophenyl)porphinato]iron (Fe–TPPS<SUB>3</SUB>) ion in aqueous solution and the redox reactions of the central metal were investigated by electrochemical and spectro-electrochemical methods. In the range of pH 3–12.5, the species formed by the reduction of Fe(III)–TPPS<SUB>3</SUB> in solution was identified as the monomeric Fe(II)–TPPS<SUB>3</SUB>, while Fe(III)–TPPS<SUB>3</SUB> exists in both monomeric and dimeric species in equilibrium. The monomeric Fe(III)–TPPS<SUB>3</SUB> was demetallated at pH below 3 in the course of reduction of the Fe(III)–TPPS<SUB>3</SUB> solution. The μ-oxo-dimer of Fe(III)–TPPS<SUB>3</SUB> in highly basic solution was reversibly reduced to Fe(II)–TPPS<SUB>3</SUB> and subsequently the monomeric Fe(I)–TPPS<SUB>3</SUB>. The formation of the stacking-type dimer of Fe(III)–TPPS<SUB>3</SUB>, significantly depending on the concentration of Fe(III)–TPPS<SUB>3</SUB>, was presumed to have a pH below 6.
- 公益社団法人 日本化学会の論文
著者
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Ujimoto Kikujiro
Department Of Chemistry Faculty Of Science Fukuoka University
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Kurihara Hirondo
Department Of Chemistry Faculty Of Science Fukuoka University
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Arifuku Fumihiro
Department Of Chemistry Faculty Of Science Fukuoka University
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Nishino Rika
Department of Chemistry, Faculty of Science, Fukuoka University
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