Experimental and Theoretical High-Energy-Resolution X-ray Absorption Spectroscopy: Implications for the Investigation of the Entatic State.

Experimental and Theoretical High-Energy-Resolution X-ray Absorption Spectroscopy: Implications for the Investigation of the Entatic State.
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实验和理论高能分辨率 X 射线吸收光谱:对实体态研究的意义

DOI:
10.1021/acs.inorgchem.6b01704
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发表时间:
2016
影响因子:
4.6
通讯作者:
M. Bauer
M. Bauer
中科院分区:
化学2区
文献类型:
--
作者:
N. J. Vollmers;P. Müller;A. Hoffmann;S. Herres-Pawlis;M. Rohrmüller;W. G. Schmidt;U. Gerstmann;M. Bauer

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高能分辨率荧光检测x射线吸收近边结构(HERFD-XANES)光谱被证明是一种敏感的工具,用于研究由配体主链引起的几何畸变引起的铜配合物的电子变化,作为内嵌态的模型。为了充分利用高能量分辨率技术获得的光谱所包含的信息,基于平面波和局域轨道基集进行了(时变的)密度泛函理论计算,这两种方法结合在一起,可以覆盖从预峰到边缘阶跃以上第一共振的整个光谱范围。因此,可以获得铜n-(1,3-二甲基咪唑烷-2-酰基)喹啉-8-胺(DMEGqu)配合物[CuI(DMEGqu)2](PF6)和[CuII(DMEGqu)2](OTf)2·MeCN中氧化和几何变形后的光谱变化。
High-energy-resolution-fluorescence-detected X-ray absorption near-edge structure (HERFD-XANES) spectroscopy is shown to be a sensitive tool to investigate the electronic changes of copper complexes induced by geometric distortions caused by the ligand backbone as a model for the entatic state. To fully exploit the information contained in the spectra gained by the high-energy-resolution technique, (time-dependent) density functional theory calculations based on plane-wave and localized orbital basis sets are performed, which in combination allow the complete spectral range from the prepeak to the first resonances above the edge step to be covered. Thus, spectral changes upon oxidation and geometry distortion in the copperN-(1,3-dimethylimidazolidin-2-ylidene)quinolin-8-amine (DMEGqu) complexes [CuI(DMEGqu)2](PF6) and [CuII(DMEGqu)2](OTf)2·MeCN can be accessed.
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