Polyferredoxin-based electrode materials |
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Authors: | Pickett C J Ibrahim S K Hughes D L |
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Institution: | Department of Biological Chemistry, John Innes Centre, Norwich, UK NR4 7UH. |
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Abstract: | Electrochemical oxidation of the hydrosulfide cluster Fe4S4(SH)4]2- on gold, platinum or vitreous carbon in a methyl cyanide electrolyte leads to the growth of a conducting film. Spectroscopic and other evidence suggests that the film has cubane centres, predominately in the 4Fe4S]3+ oxidation state, which are linked by disulfide ligands to give an anionic array of Fe4S4(S approximately)4]n- units. X-ray data suggests some long-range order in the electrode material. The polyferredoxin binds redox active cations consistent with an anionic array. |
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