[Ru II (edta)(pz)] 2- (edta 4- = 乙二胺四乙酸盐;pz = 吡嗪)对分子氧 (O 2 ) 和过氧化氢 (H 2 O 2 ) 的还原作用已在水溶液中进行了分光光度法和动力学研究解决方案。水类似物 [Ru II (edta)(H 2 O)] 2-暴露于 O 2和 H 2 O 2导致形成 [Ru III (edta)(H 2 O)] -物质,随后形成相应的 Ru V复杂的哦。提出了由Ru II(edta)配合物介导的O 2和H 2 O 2还原反应的工作机制。讨论了配位水分子(通过其在主要配位球中的不存在或存在)在控制外球或内球的机械途径中的作用。
Electron-transfer reactions in [Ru(edta)(pyz)]<sup>–</sup>(edta = ethylenedinitrilotetraacetate, pyz = pyrazine)
作者:Debabrata Chatterjee
DOI:10.1039/dt9960004389
日期:——
The kinetics of reduction of [Ru-III(edta)(pyz)](-)(edta = ethylenedinitrilotetraacetate, pyz = pyrazine) with L-ascorbic acid (H(2)A) and catechol (H(2)cat) was studied spectrophotometrically as a function of [H(2)A] or [H(2)cat], pH, ionic strength and temperature (25-45 degrees C). The reduction was found to be first order in both the complex and reductant concentrations. The pH dependence of the process(for H(2)A) was ascribed to the deprotonation of H(2)A. Kinetic data and activation parameters are interpreted in terms of a mechanism involving outer-sphere electron transfer.