论文标题
通过高纯度X射线极化法揭示金属化合物中的电荷各向异性
Revealing charge anisotropies in metal compounds via high-purity x-ray polarimetry
论文作者
论文摘要
硬性X射线的线性极化分析用于探测具有很高选择性的金属络合物中的电子各向异性。我们使用核谐振X射线散射的明显线性二色性来确定在温度依赖性高旋转/低旋转相变中含有化合物的铁（II）中的电场梯度。该方法构成了一种新的方法，可以分析含金属分子的电子结构作为外部参数或刺激的函数的变化。该技术的极化选择性使我们能够监视相变跨相变的电子价态的缺陷浓度。这为追踪电子变化及其前体提供了新的途径，这些途径与从简单分子固体到生物分子的金属化合物类别中连接到结构和电子动力学。
Linear polarization analysis of hard x-rays is employed to probe electronic anisotropies in metal-containing complexes with very high selectivity. We use the pronounced linear dichroism of nuclear resonant x-ray scattering to determine electric field gradients in an iron(II) containing compound as they evolve during a temperature-dependent high-spin/low-spin phase transition. This method constitutes a novel approach to analyze changes in the electronic structure of metal-containing molecules as function of external parameters or stimuli. The polarization selectivity of the technique allows us to monitor defect concentrations of electronic valence states across phase transitions. This opens new avenues to trace electronic changes and their precursors that are connected to structural and electronic dynamics in the class of metal compounds ranging from simple molecular solids to biological molecules.
