Disentangling Transient Charge Density and Metal–Ligand Covalency in Photoexcited Ferricyanide with Femtosecond Resonant Inelastic Soft X-ray Scattering
Abstract
Soft X-ray spectroscopies are ideal probes of the local valence electronic structure of photocatalytically active metal sites. Here, we apply the selectivity of time-resolved resonant inelastic X-ray scattering at the iron L-edge to the transient charge distribution of an optically excited charge-transfer state in aqueous ferricyanide. Through comparison to steady-state spectra and quantum chemical calculations, the coupled effects of valence-shell closing and ligand-hole creation are experimentally and theoretically disentangled and described in terms of orbital occupancy, metal–ligand covalency, and ligand field splitting, thereby extending established steady-state concepts to the excited-state domain. π-Back-donation is found to be mainly determined by the metal site occupation, whereas the ligand hole instead influences σ-donation. Here, our results demonstrate how ultrafast resonant inelastic X-ray scattering can help characterize local charge distributions around catalytic metal centers in short-lived charge-transfer excited states, as a step toward future rationalization and tailoring of photocatalytic capabilities of transition-metal complexes.
- Authors:
-
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- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
- Department of Physics, Stockholm University, Albanova University Center, 10691 Stockholm, Sweden
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany, Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany, DESY Photon Science, 22607 Hamburg, Germany
- LCLS, SLAC, Menlo Park, California 94025, United States
- PULSE Institute, SLAC, Menlo Park, California 94025, United States
- DESY Photon Science, 22607 Hamburg, Germany
- DESY Photon Science, 22607 Hamburg, Germany, Institute for X-ray Physics, Göttingen University, 37077 Göttingen, Germany
- Department of Chemistry - Ȧngström Laboratory, Uppsala University, 75121 Uppsala, Sweden, Department of Biotechnology, Chemistry and Pharmacy, Università di Siena, 53100 Siena, Italy
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1457798
- Alternate Identifier(s):
- OSTI ID: 1454547
- Report Number(s):
- SLAC-PUB-17249
Journal ID: ISSN 1948-7185
- Grant/Contract Number:
- VI419; SFB 755; SB755 (B03); KAW-2013.0020; 87008; 669531; AC02-76SF00515
- Resource Type:
- Published Article
- Journal Name:
- Journal of Physical Chemistry Letters
- Additional Journal Information:
- Journal Name: Journal of Physical Chemistry Letters Journal Volume: 9 Journal Issue: 12; Journal ID: ISSN 1948-7185
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Jay, Raphael M., Norell, Jesper, Eckert, Sebastian, Hantschmann, Markus, Beye, Martin, Kennedy, Brian, Quevedo, Wilson, Schlotter, William F., Dakovski, Georgi L., Minitti, Michael P., Hoffmann, Matthias C., Mitra, Ankush, Moeller, Stefan P., Nordlund, Dennis, Zhang, Wenkai, Liang, Huiyang W., Kunnus, Kristjan, Kubiček, Katharina, Techert, Simone A., Lundberg, Marcus, Wernet, Philippe, Gaffney, Kelly, Odelius, Michael, and Föhlisch, Alexander. Disentangling Transient Charge Density and Metal–Ligand Covalency in Photoexcited Ferricyanide with Femtosecond Resonant Inelastic Soft X-ray Scattering. United States: N. p., 2018.
Web. doi:10.1021/acs.jpclett.8b01429.
Jay, Raphael M., Norell, Jesper, Eckert, Sebastian, Hantschmann, Markus, Beye, Martin, Kennedy, Brian, Quevedo, Wilson, Schlotter, William F., Dakovski, Georgi L., Minitti, Michael P., Hoffmann, Matthias C., Mitra, Ankush, Moeller, Stefan P., Nordlund, Dennis, Zhang, Wenkai, Liang, Huiyang W., Kunnus, Kristjan, Kubiček, Katharina, Techert, Simone A., Lundberg, Marcus, Wernet, Philippe, Gaffney, Kelly, Odelius, Michael, & Föhlisch, Alexander. Disentangling Transient Charge Density and Metal–Ligand Covalency in Photoexcited Ferricyanide with Femtosecond Resonant Inelastic Soft X-ray Scattering. United States. https://doi.org/10.1021/acs.jpclett.8b01429
Jay, Raphael M., Norell, Jesper, Eckert, Sebastian, Hantschmann, Markus, Beye, Martin, Kennedy, Brian, Quevedo, Wilson, Schlotter, William F., Dakovski, Georgi L., Minitti, Michael P., Hoffmann, Matthias C., Mitra, Ankush, Moeller, Stefan P., Nordlund, Dennis, Zhang, Wenkai, Liang, Huiyang W., Kunnus, Kristjan, Kubiček, Katharina, Techert, Simone A., Lundberg, Marcus, Wernet, Philippe, Gaffney, Kelly, Odelius, Michael, and Föhlisch, Alexander. Mon .
"Disentangling Transient Charge Density and Metal–Ligand Covalency in Photoexcited Ferricyanide with Femtosecond Resonant Inelastic Soft X-ray Scattering". United States. https://doi.org/10.1021/acs.jpclett.8b01429.
@article{osti_1457798,
title = {Disentangling Transient Charge Density and Metal–Ligand Covalency in Photoexcited Ferricyanide with Femtosecond Resonant Inelastic Soft X-ray Scattering},
author = {Jay, Raphael M. and Norell, Jesper and Eckert, Sebastian and Hantschmann, Markus and Beye, Martin and Kennedy, Brian and Quevedo, Wilson and Schlotter, William F. and Dakovski, Georgi L. and Minitti, Michael P. and Hoffmann, Matthias C. and Mitra, Ankush and Moeller, Stefan P. and Nordlund, Dennis and Zhang, Wenkai and Liang, Huiyang W. and Kunnus, Kristjan and Kubiček, Katharina and Techert, Simone A. and Lundberg, Marcus and Wernet, Philippe and Gaffney, Kelly and Odelius, Michael and Föhlisch, Alexander},
abstractNote = {Soft X-ray spectroscopies are ideal probes of the local valence electronic structure of photocatalytically active metal sites. Here, we apply the selectivity of time-resolved resonant inelastic X-ray scattering at the iron L-edge to the transient charge distribution of an optically excited charge-transfer state in aqueous ferricyanide. Through comparison to steady-state spectra and quantum chemical calculations, the coupled effects of valence-shell closing and ligand-hole creation are experimentally and theoretically disentangled and described in terms of orbital occupancy, metal–ligand covalency, and ligand field splitting, thereby extending established steady-state concepts to the excited-state domain. π-Back-donation is found to be mainly determined by the metal site occupation, whereas the ligand hole instead influences σ-donation. Here, our results demonstrate how ultrafast resonant inelastic X-ray scattering can help characterize local charge distributions around catalytic metal centers in short-lived charge-transfer excited states, as a step toward future rationalization and tailoring of photocatalytic capabilities of transition-metal complexes.},
doi = {10.1021/acs.jpclett.8b01429},
journal = {Journal of Physical Chemistry Letters},
number = 12,
volume = 9,
place = {United States},
year = {Mon Jun 11 00:00:00 EDT 2018},
month = {Mon Jun 11 00:00:00 EDT 2018}
}
https://doi.org/10.1021/acs.jpclett.8b01429
Web of Science
Figures / Tables:
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