Spectroscopic studies on the production of hydroxyl radicals from the reactions of copper(II)polyamine-n-polycarboxylate complexes with hydrogen peroxide
作者:Toshihiko Ozawa、Akira Hanaki、Kayoko Onodera
DOI:10.1016/s0277-5387(00)86004-0
日期:1992.1
NADH and glutathione, no reaction occurred between CuII(edta) and H2O2; but, in the presence of these biological reductants, CuII(edta) was reduced to CuI and then the subsequent redox reaction (Fenton-type reaction) between CuI and H2O2 occurred to yield hydroxyl radicals (·.OH). From these results, it is concluded that copper(II)-polyamine-N-polycarboxylate complexes cannot directly be reduced to CuI
光谱研究了铜(II)-多胺-N-多羧酸盐配合物,例如Cu II(edta)(edta:乙二胺四乙酸)和Cu II(dtpa)(dtpa:二亚乙基三胺五乙酸)与过氧化氢(H 2 O 2)的反应。在存在或不存在生物还原剂的情况下。在不存在诸如L-半胱氨酸,N-乙酰基-L-半胱氨酸,L-抗坏血酸,NADH和谷胱甘肽之类的生物还原剂的情况下,Cu II(edta)和H 2 O 2之间没有反应发生。但是,在这些生物还原剂的存在下,Cu II(edta)被还原为Cu I然后发生随后的Cu I和H 2 O 2之间的氧化还原反应(芬顿型反应),产生羟基自由基(·.OH)。从这些结果可以得出结论,H 2 O 2无法将铜(II)-多胺-N-多羧酸盐络合物直接还原为Cu I,因为CU 2 +离子对H 2 O 2的氧化还原电势已被改变。与这些聚胺-N-聚羧酸酯配体连接。