Reactions of Tetraazamacrocyclic FeIII Complexes with Hydrogen Peroxide − Putative Catalase Mimics?
作者:Sabrina Autzen、Hans-Gert Korth、Herbert de Groot、Reiner Sustmann
DOI:10.1002/1099-0690(200108)2001:16<3119::aid-ejoc3119>3.0.co;2-t
日期:2001.8
analogous complex Fe(III)-2 at pH = 7.2 found that no oxygen was formed under physiological conditions, although hydrogen peroxide was decomposed to an extent of more than 50%. Complex Fe(III)-3 produced oxygen on reaction with H2O2, but only in stoichiometric amounts. Thus, the decomposition of hydrogen peroxide by these iron(III) complexes cannot reasonably be described as a catalase-like activity.
研究了大环四氮杂配体 [Fe(III)-1-Fe(III)-3] 的铁 (III) 配合物在生理条件下推定的类似过氧化氢酶的性质:即,在 pH = 7.0-7.4 和微摩尔浓度的催化剂和过氧化氢。络合物 Fe(III)-1,最初由 Busch 等人研究。作为过氧化氢酶模型,在 pH = 4.6 时,仅将过氧化氢降解为氧气,作为该 pH 下的次要反应(< 1% O2 产率)。在 pH = 7.2 条件下使用类似复合物 Fe(III)-2 进行的实验发现,尽管过氧化氢分解了 50% 以上,但在生理条件下没有形成氧气。复合物 Fe(III)-3 在与 H2O2 反应时产生氧气,但仅以化学计量的量产生。因此,