Towards solution-phase transient xuv absorption spectroscopy of iron tetraphenylporphyrin

Sye, Kori

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https://hdl.handle.net/2142/107633 Copy

Description

Title

Towards solution-phase transient xuv absorption spectroscopy of iron tetraphenylporphyrin

Author(s)

Sye, Kori

Contributor(s)

Vura-Weis, Josh

Issue Date

2020-06-23

Keyword(s)

Instrument/Technique Demonstration

Abstract

Ultrafast extreme ultraviolet (XUV) absorption spectroscopy can probe the dynamics of excited states in first-row transition metals complexes with sensitivity to the oxidation state, spin state, and ligand field of the metal center. This technique is performed with a tabletop instrument and probes the M-edge transitions from the 3p to the 3d orbital of a metal center. XUV absorption spectroscopy has until now been limited to studying solid-state or gas-phase samples due to the short penetration depth of XUV photons and the high-vacuum conditions. To study solution-phase chemistry with XUV absorption, I used a microfluidic chip to generate free-flowing, submicron thick liquid sheets of nonpolar, XUV transmissive solutions. I have characterized the thickness and stability of dichloroethane liquid sheets under vacuum and have adapted our tabletop high-harmonic instrument to maintain high vacuum during liquid flow. This sample delivery method will be used to study the solution-phase excited state dynamics of iron(III) tetraphenyl porphyrin chloride (FeTPPCl). This will help to understand the impact of a solution-phase on the excited state dynamics at the FeTPPCl metal center and elucidate the ability of FeTPPCl to act as a photocatalyst in solution.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/107633

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Copyright 2020 is held by the Author(s)

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