Conformationally dynamic copper coordination complexes.

Conformationally dynamic copper coordination complexes.
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动态构象铜配合物。

DOI:
10.1039/d2dt00312k
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发表时间:
2022-04-20
影响因子:
4
通讯作者:
Olshansky, Lisa
Olshansky, Lisa
中科院分区:
化学2区
文献类型:
--
作者:
Charette, Bronte J.;Griffin, Paul J.;Zimmerman, Claire M.;Olshansky, Lisa

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氧化态和配位几何之间的相互作用决定了铜配合物中电子转移事件的动力学和热力学性质。在单一构象动态螯合配体中稳定CuI和CuII氧化态的能力允许获得受控的氧化还原反应性。我们报告的CuI配合物轴承dipicolylaniline(dpaR)配体,邻苯胺取代基R = H和R = OMe的构象动力学分析。变温核磁共振谱和电化学实验表明,在室温下的溶液中,两种构象之间存在平衡。两个金属为中心的氧化还原事件观察到,支持从单晶X-射线衍射和EPR和NMR光谱的解决方案信息的结构信息,归因于铜II/I对平面和四面体构象,分别。这些结构相互转换的激活和平衡参数,并提供进入利用氧化还原引发的构象动力学在铜。
The interplay between oxidation state and coordination geometry dictates both kinetic and thermodynamic properties underlying electron transfer events in copper complexes. An ability to stabilize both CuI and CuII oxidation states in a single conformationally dynamic chelating ligand allows access to controlled redox reactivity. We report an analysis of the conformational dynamics of CuI complexes bearing dipicolylaniline (dpaR) ligands, with ortho-aniline substituents R = H and R = OMe. Variable temperature NMR spectroscopy and electrochemical experiments suggest that in solution at room temperature, an equilibrium exists between two conformers. Two metal-centered redox events are observed which, bolstered by structural information from single crystal X-ray diffraction and solution information from EPR and NMR spectroscopies, are ascribed to the CuII/I couple in planar and tetrahedral conformations, respectively. Activation and equilibrium parameters for these structural interconversions are presented and provide entry to leveraging redox-triggered conformational dynamics at Cu.
DOI: 10.1002/open.201500042
发表时间: 2015-06
期刊: ChemistryOpen
影响因子: 2.3
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