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Molecular mechanism of hydrogen peroxide conversion and activation by Cu(II)-amikacin complexes.
Autorzy
Rok wydania
2001
Czasopismo
Chemical Research in Toxicology
Numer woluminu
14
Strony
1353-1362
DOI
10.1021/tx010046l
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The interactions between Cu(II)-amikacin complexes [Cu(II)-Ami] and hydrogen peroxide were studied by spectroscopy (EPR, UV-vis, CD, XAS) and cyclic voltammetry. A monomer-dimer equilibrium was detected at complex concentrations above 5 mM (log K(dim) = 1.84 +/- 0.03). The dimeric complex undergoes easy, although irreversible oxidation (ca. 0.5-0.6 V) to a Cu(III) species on platinum electrode. However, the monomeric complexes are able to catalyze hydrogen peroxide disproportionation reaction at pH 7.4 in a multistep process, mediated by hydroxyl radicals and involving both Cu(I)/Cu(II) and Cu(II)/Cu(III) redox pairs.
Adres publiczny
http://dx.doi.org/10.1021/tx010046l
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