Cited by 60Photochemistry and Electron Transfer StudiesMagnetism in coordination complexesSpectroscopy and Quantum Chemical Studies

Identification of the dominant photochemical pathways and mechanistic insights to the ultrafast ligand exchange of Fe(CO)5 to Fe(CO)4EtOH

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Kunnus, K., Josefsson, I., Rajkovic, I., Schreck, S., Quevedo, W., Beye, M., Weniger, C., Grübel, S. +14 more·2016·Structural Dynamics

Abstract

We utilized femtosecond time-resolved resonant inelastic X-ray scattering and ab initio theory to study the transient electronic structure and the photoinduced molecular dynamics of a model metal carbonyl photocatalyst Fe(CO)5 in ethanol solution. We propose mechanistic explanation for the parallel ultrafast intra-molecular spin crossover and ligation of the Fe(CO)4 which are observed following a charge transfer photoexcitation of Fe(CO)5 as reported in our previous study [Wernet et al., Nature 520, 78 (2015)]. We find that branching of the reaction pathway likely happens in the 1A1 state of Fe(CO)4. A sub-picosecond time constant of the spin crossover from 1B2 to 3B2 is rationalized by the proposed 1B2 → 1A1 → 3B2 mechanism. Ultrafast ligation of the 1B2 Fe(CO)4 state is significantly faster than the spin-forbidden and diffusion limited ligation process occurring from the 3B2 Fe(CO)4 ground state that has been observed in the previous studies. We propose that the ultrafast ligation occurs via 1B2 → 1A1 → 1A′ Fe(CO)4EtOH pathway and the time scale of the 1A1 Fe(CO)4 state ligation is governed by the solute-solvent collision frequency. Our study emphasizes the importance of understanding the interaction of molecular excited states with the surrounding environment to explain the relaxation pathways of photoexcited metal carbonyls in solution.

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  • In the case of Fe(CO)5, resonant inelastic x-ray scattering revealed the singlet spin nature of the photoproduct Fe(CO)4.

    “In the case of Fe(CO) 5 , for example, resonant inelastic x-ray scattering (RIXS) [18], revealed the singlet spin nature of the photoproduct Fe(CO) 4 .”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [18]

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  1. [2]J. Stöhr, NEXAFS Spectroscopy (Springer, Berlin, 1992).
  2. [17]M. Dartigue, Y. Dartigue, and H. B. Gray, Bull. Soc. Chim. Fr. 12, 4223 (1969).

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Authors
Kunnus, K., Josefsson, I., Rajkovic, I., Schreck, S., Quevedo, W., Beye, M., Weniger, C., Grübel, S., Scholz, M., Nordlund, D., Zhang, W., Hartsock, R. W., Gaffney, K. J., Schlotter, W. F., Turner, J. J., Kennedy, B., Hennies, F., de Groot, F. M. F., Techert, S., Odelius, M., Wernet, P., & Föhlisch, A.
Affiliations
  • University of Potsdam (DE)
  • Stockholm University (SE)
  • Max Planck Institute for Biophysical Chemistry 4 , Am Fassberg 11, 37070 Göttingen, Germany
  • Helmholtz-Zentrum Berlin für Materialien und Energie (DE)
  • SLAC National Accelerator Laboratory (US)
  • MAX-lab 8 , P.O. Box 118, 221 00 Lund, Sweden
  • Utrecht University 9 Department of Chemistry, , Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
  • Deutsches Elektronen-Synchrotron DESY (DE)
  • Institute for Methods and Instrumentation for Synchrotron Radiation Research 1 , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
Venue
Structural Dynamics
Published
2016-02-09
Volume
3
Issue
4
Pages
043204-043204
ISSN
2329-7778 (ISSN-L)
OpenAlex
W2252980218
Cited by
60
References
90
Citations by year
2026: 2 · 2025: 4 · 2024: 2 · 2023: 1 · 2022: 9 · 2021: 7 · 2020: 5 · 2019: 7 · 2018: 9 · 2017: 8 · 2016: 6
FWCI
6.84
Type
journal article
Language
en
Open access
Locations
  • Structural Dynamics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DORA PSI (Paul Scherrer Institute) (submittedVersion, cc-by)
  • HZB Repository (Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB)) (submittedVersion, other-oa)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion, cc-by)
  • Desy Publications Database (Deutsches Elektronen-Synchrotron DESY) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
  • GoeScholar The Publication Server of the Georg-August-Universität Göttingen (Georg-August-Universität Göttingen) (submittedVersion, cc-by)
  • publish.UP (University of Potsdam) (submittedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
  • GRO (submittedVersion, cc-by)
Funders
  • U.S. Department of Energy (76SF00515, DE–AC02–76SF00515, AC02‐76SF00515, DE-AC02-)
  • National Science Council (HPC2N)
  • Bundesministerium für Bildung und Forschung (FSP301)
  • Max-Planck-Gesellschaft
  • Vetenskapsrådet (DE-AC02-76SF00515)
  • Universität Hamburg (FSP 301)
  • Magnus Bergvalls Stiftelse
  • Office of Science (AC02-76SF00515, DE-AC02-76SF0051 5, DE-AC02, 76SF00515)
  • Basic Energy Sciences (DE-AC02, 76SF00515, AC02-76SF00515, DE-AC-02-76SF00515)
  • Chemical Sciences, Geosciences, and Biosciences Division (DE-AC02-76SF00515)
  • Lawrence Berkeley National Laboratory (DE-AC02-76SF00515)
  • SLAC National Accelerator Laboratory (DEAC02−76SF00515, AC02‐76SF00515)
Topics
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Magnetism in coordination complexes
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
Keywords
iron pentacarbonyl, ligand exchange, spin crossover, photochemical pathways, excited-state relaxation

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