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.

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.
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DOI:
10.1021/ja203458d
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发表时间:
2011-06-22
影响因子:
15
通讯作者:
Borovik, A. S.
Borovik, A. S.
中科院分区:
化学1区
文献类型:
--
作者:
Park, Young Jun;Ziller, Joseph W.;Borovik, A. S.

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在氧化还原活性的2族金属离子存在时,观察到MnII配合物对二氧的还原速率增强。速率的变化与第二族金属离子刘易斯酸度的增加有关。这些研究分离出了含有MnIII-(μ-OH)-MII核的杂双金属配合物(MII = CaII, BaII),其中的羟基氧原子来源于O2。这种类型的核心结构与光系统II中的出氧配合物有关。
Rate enhancements for the reduction of dioxygen by a MnII complex were observed in the presence of redox inactive Group 2 metal ions. The rate changes correlated with an increase in the Lewis acidity of the Group 2 metal ions. These studies led to the isolation of heterobimetallic complexes that contain MnIII-(μ-OH)-MII cores (MII = CaII, BaII), in which the hydroxo oxygen atom is derived from O2. This type of core structure has relevance to the oxygen evolving complexes within photosystem II.
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