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Direct electrochemistry of cytochrome c on EDTA‐ZrO 2 organic‐inorganic hybrid film modified electrodes
Author(s) -
Xu JingJuan,
Peng Ying,
Liu ShouQing,
Chen HongYuan
Publication year - 2004
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20040221205
Subject(s) - chemistry , electrochemistry , ethylenediamine , cytochrome c , redox , chelation , metal , inorganic chemistry , electrode , valence (chemistry) , electron transfer , metal ions in aqueous solution , photochemistry , organic chemistry , biochemistry , mitochondrion
A composite film of ethylenediamine tetraacetic acid (EDTA)‐ZrO 2 organic‐inorganic hybrid was prepared based on the chelation between Zr(IV) and EDTA. The direct electrochemical behavior of cytochrome c (cyt. c) at the hybrid film modified glassy carbon electrodes was investigated. The immobilized EDTA can promote the redox of heme in horse heart cyt. c which gives rise to a pair of reversible redox peaks with a formal potential of 40 mV (vs. SCE). The peak current increased linearly with the increase of cyt. c concentration in the range of 1.6 × 10 −6 —8.0 × 10 −5 mol·L −1 with the correlation coefficient of 0.996. Further investigation shows that metal ions can impede the electron transfer of cyt. c. The impediment capability of metal ions depends on their coordination capability with EDTA and their valence number.