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Annual Review of Physical Chemistry

Volume 73, 2022

Capturing Atom-Specific Electronic Structural Dynamics of Transition-Metal Complexes with Ultrafast Soft X-Ray Spectroscopy

Abstract

The atomic specificity of X-ray spectroscopies provides a distinct perspective on molecular electronic structure. For 3 metal coordination and organometallic complexes, the combination of metal- and ligand-specific X-ray spectroscopies directly interrogates metal–ligand covalency—the hybridization of metal and ligand electronic states. Resonant inelastic X-ray scattering (RIXS), the X-ray analog of resonance Raman scattering, provides access to all classes of valence excited states in transition-metal complexes, making it a particularly powerful means of characterizing the valence electronic structure of 3 metal complexes. Recent advances in X-ray free-electron laser sources have enabled RIXS to be extended to the ultrafast time domain. We review RIXS studies of two archetypical photochemical processes: charge-transfer excitation in ferricyanide and ligand photodissociation in iron pentacarbonyl. These studies demonstratefemtosecond-resolution RIXS can directly characterize the time-evolving electronic structure, including the evolution of the metal–ligand covalency.

Keyword(s): chemical dynamics, electron transfer, electronic structure, photodissociation, transition-metal complexes, X-ray spectroscopy
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/content/journals/10.1146/annurev-physchem-082820-020236
2022-04-20
2024-05-09
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/content/journals/10.1146/annurev-physchem-082820-020236
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Capturing Atom-Specific Electronic Structural Dynamics of Transition-Metal Complexes with Ultrafast Soft X-Ray Spectroscopy
Annual Review of Physical Chemistry 73, 187 (2022); https://doi.org/10.1146/annurev-physchem-082820-020236
/content/journals/10.1146/annurev-physchem-082820-020236
/content/journals/10.1146/annurev-physchem-082820-020236
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