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 Title: RESOLVING ULTRAFAST PHOTOCHEMISTRY OF COORDINATION COMPLEXES USING HIGH HARMONIC GENERATION XANES SPECTROSCOPY Author(s): Ryland, Elizabeth S. Contributor(s): Carlson, Michaela; Benke, Kristin; Lin, Ming-Fu; Verkamp, Max A.; Burhani, Muffaddal; Zhang, Kaili; Vura-Weis, Josh Subject(s): Dynamics and kinetics Abstract: Extreme ultraviolet (XUV) spectroscopy is an inner shell technique that probes the M$_{2,3}$ -edge excitation of atoms. Absorption of the XUV photon causes a 3p $\rightarrow$ 3d transition, the energy and multiplet of which is directly related to the element and ligand environment. This in-lab technique is thus element-, oxidation state-, spin state-, and ligand field specific and is a useful tool for the study of electron and energy transfer processes in materials and chemical biology. With the use of this technique and semi-empirical simulations, I have collected ultrafast transient M$_{2,3}$ -edge absorption data of four different metalloporphyrinates (M = Fe, Co, Ni, Mn) in order to resolve the early time relaxation mechanism of these catalytically-relevant coordination complexes with femtosecond time resolution. This is the first instance of using tabletop transient XUV/VUV spectroscopy on coordination complexes and furthermore highlights the importance of directly probing of the metal center in these systems. I will additionally present ongoing work on applying this technique to the study of heterobimetallic systems with directly-interacting dual metal centers within a non-innocent ligand scaffold. The relation of function to metal-specific photodynamics will help lay essential groundwork for the development of multimetallic catalysts with efficiencies comparable to those found in nature. Issue Date: 06/19/18 Publisher: International Symposium on Molecular Spectroscopy Citation Info: APS Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/100781 DOI: 10.15278/isms.2018.TD10 Other Identifier(s): TD10 Date Available in IDEALS: 2018-08-172018-12-12
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