Manganese K-edge X-ray absorption spectroscopy as a probe of the metal-ligand interactions in coordination compounds.

Manganese K-edge X-ray absorption spectroscopy as a probe of the metal-ligand interactions in coordination compounds.
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锰 K 边 X 射线吸收光谱作为配位化合物中金属-配体相互作用的探针。

DOI:
10.1021/ic202229b
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发表时间:
2012
影响因子:
4.6
通讯作者:
S. DeBeer
S. DeBeer
中科院分区:
化学2区
文献类型:
--
作者:
Michael Roemelt;M. Beckwith;C. Duboc;M. Collomb;F. Neese;S. DeBeer

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通过 X 射线吸收光谱 (XAS) 研究了一系列锰配位化合物。 K 前边缘光谱借助时间相关密度泛函理论 (TD-DFT) 进行解释。该方法针对具有不同泛函的锰 K 前边缘的预测进行了校准。此外,所有观察到的特征的性质都可以根据相应的受体轨道集(1s 到 3d 跃迁或金属到配体电荷转移(MLCT)带)进行识别和分类。可观察到的 MLCT 带进一步分为与 π 供体配体和 π 受体配体空 π* 轨道跃迁相对应的特征。在正确的相对跃迁能量下通过计算重现观察到的特征的能力很大程度上取决于跃迁的性质。对一系列锰配位化合物的电子结构的详细分析表明,不同类别的可观察转变为金属-配体键合相互作用提供了更多的见解。
A series of manganese coordination compounds has been investigated by X-ray absorption spectroscopy (XAS). The K-pre-edge spectra are interpreted with the aid of time-dependent density functional theory (TD-DFT). This method was calibrated for the prediction of manganese K-pre-edges with different functionals. Moreover the nature of all observed features could be identified and classified according to the corresponding set of acceptor orbitals, either 1s to 3d transitions or metal-to-ligand charge transfer (MLCT) bands. The observable MLCT bands are further divided into features that correspond to transitions into empty π* orbitals of π-donor ligands and those of π-acceptor ligands. The ability to computationally reproduce the observed features at the correct relative transition energy is strongly dependent on the nature of the transition. A detailed analysis of the electronic structure of a series of Mn coordination compounds reveals that the different classes of observable transitions provide added insight into metal-ligand bonding interactions.
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发表时间: 2001
影响因子: 4.6
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