氧化还原非活性金属离子对氧气活化的影响：含 Mn(III)-(μ-OH)-Ca(II)核的异双核配合物的分离与表征。
The effects of redox-inactive metal ions on the activation of dioxygen: isolation and characterization of a heterobimetallic complex containing a Mn(III)-(μ-OH)-Ca(II) core.
机构信息
Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697, USA.
出版信息
J Am Chem Soc. 2011 Jun 22;133(24):9258-61. doi: 10.1021/ja203458d. Epub 2011 May 31.
Abstract
Rate enhancements for the reduction of dioxygen by a Mn(II) complex were observed in the presence of redox-inactive group 2 metal ions. The rate changes were correlated with an increase in the Lewis acidity of the group 2 metal ions. These studies led to the isolation of heterobimetallic complexes containing Mn(III)-(μ-OH)-M(II) cores (M(II) = Ca(II), Ba(II)) in which the hydroxo oxygen atom is derived from O(2). This type of core structure has relevance to the oxygen-evolving complex within photosystem II.
摘要
在氧化还原惰性的二价金属离子存在的情况下，观察到 Mn(II) 配合物对二氧的还原速率增强。速率变化与二价金属离子路易斯酸度的增加相关。这些研究导致了包含 Mn(III)-(μ-OH)-M(II) 核（M(II) = Ca(II), Ba(II)）的异双核配合物的分离，其中的羟氧原子来自 O(2)。这种核结构与光合作用系统 II 中的氧释放复合物有关。
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