作者:G. I. Khaikin、Z. B. Alfassi、R. E. Huie、P. Neta
DOI:10.1021/jp9533335
日期:1996.1.1
Alkylperoxyl and arylperoxyl radicals were produced by pulse radiolysis in aqueous solutions, and their reactions with ferrous and ferrocyanide ions were studied by kinetic spectrophotometry. Oxidation of Fe(CN)64- took place with rate constants that varied from <1 × 105 to 5 × 107 L mol-1 s-1, depending on the electron-withdrawing effects of the substituents on the peroxyl radical and presumably reflecting
在水溶液中通过脉冲辐射分解产生烷基过氧自由基和芳基过氧自由基,并通过动力学分光光度法研究它们与亚铁和亚铁氰化物离子的反应。Fe(CN)6 4-的氧化速率常数从<1×10 5到5×10 7 L mol -1 s -1变化,这取决于取代基对过氧自由基和电子的吸电子作用。大概反映了过氧自由基还原电位的变化,这是外球电子转移所期望的。Fe aq 2+的氧化另一方面,是通过受水配体的解离交换速率控制的内球机理发生的。所述速率常数分别为几乎相同的所有过氧自由基检查(ķ =(0.5-1.1)×10 6大号摩尔-1小号-1)和所涉及的瞬时中间体的形成,RO 2 -的Fe 3+,后来分解产生Fe aq 3+。H +和Fe 2+促进分解。所提出的机理是对先前提出的反应方案的修改。