Shrinking the Synchrotron: Tabletop Extreme Ultraviolet Absorption of Transition-Metal Complexes

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• 作者：Kaili Zhang ; Ming-Fu Lin ; Elizabeth S. Ryland ; Max A. Verkamp ; Kristin Benke ; Frank M. F. de Groot ; Gregory S. Girolami ; Josh Vura-Weis
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2016
• 出版时间：September 1, 2016
• 年：2016
• 卷：7
• 期：17
• 页码：3383-3387
• 全文大小：375K
• 年卷期：0
• ISSN：1948-7185

文摘

We show that the electronic structure of molecular first-row transition-metal complexes can be reliably measured using tabletop high-harmonic XANES at the metal M<sub>2,3sub> edge. Extreme ultraviolet photons in the 50–70 eV energy range probe 3p → 3d transitions, with the same selection rules as soft X-ray L<sub>2,3sub>-edge absorption (2p → 3d excitation). Absorption spectra of model complexes are sensitive to the electronic structure of the metal center, and ligand field multiplet simulations match the shapes and peak-to-peak spacings of the experimental spectra. This work establishes high-harmonic spectroscopy as a powerful tool for studying the electronic structure of molecular inorganic, bioinorganic, and organometallic compounds.