---
_id: '60600'
abstract:
- lang: eng
  text: In the search for noble metal free photocatalytic systems, iron is the dream
    candidate. To increase excited state lifetimes of iron complexes, the multichromophoric
    approach is promising, combining organic chromophores with photoactive iron complexes,
    potentially enabling a reservoir effect. We present a series of chromophore-functionalized
    complexes based on the parental FeIII complex [Fe(ImP)2][PF6] (HImP = 1,1′-(1,3-phenylene)bis(3-methyl-1-imidazole-2-ylidene)).
    The four organic chromophores benzene, naphthalene, anthracene, and pyrene are
    attached to the ImP-ligand in para-position to the coordination site to systematically
    investigate the influence of the steric demand and electronic properties of the
    chromophore on charge transfer lifetimes as well as photodynamics. A thorough
    ground state characterization was conducted in addition to investigations of the
    excited state dynamics by transient absorption spectroscopy and streak camera
    emission measurements. The conclusions drawn are supported by extensive DFT calculations.
    The emission coefficients could be significantly improved by the addition of chromophores.
    After excitation of the complexes with larger chromophores, coplanarization of
    the backbone and complex motif occurs to stabilize the formal charge. This results
    in population of a superligand state that exhibits a much faster radiationless
    relaxation to the ground state compared to the parent complex, hindering a reservoir
    effect.
article_number: acs.inorgchem.5c00526
author:
- first_name: Lennart
  full_name: Schmitz, Lennart
  id: '53140'
  last_name: Schmitz
- first_name: Miguel A.
  full_name: Argüello Cordero, Miguel A.
  last_name: Argüello Cordero
- first_name: Mohammed J.
  full_name: Al-Marri, Mohammed J.
  last_name: Al-Marri
- first_name: Roland
  full_name: Schoch, Roland
  id: '48467'
  last_name: Schoch
  orcid: 0000-0003-2061-7289
- first_name: Hans
  full_name: Egold, Hans
  id: '101'
  last_name: Egold
- first_name: Adam
  full_name: Neuba, Adam
  last_name: Neuba
- first_name: Jakob
  full_name: Steube, Jakob
  id: '40342'
  last_name: Steube
  orcid: 0000-0003-3178-4429
- first_name: Bastian Johannes
  full_name: Bracht, Bastian Johannes
  id: '86707'
  last_name: Bracht
- first_name: Olga S.
  full_name: Bokareva, Olga S.
  last_name: Bokareva
- first_name: Stefan
  full_name: Lochbrunner, Stefan
  last_name: Lochbrunner
- first_name: Matthias
  full_name: Bauer, Matthias
  id: '47241'
  last_name: Bauer
  orcid: 0000-0002-9294-6076
citation:
  ama: Schmitz L, Argüello Cordero MA, Al-Marri MJ, et al. Chromophore Induced Effects
    in Iron(III) Complexes. <i>Inorganic Chemistry</i>. Published online 2025. doi:<a
    href="https://doi.org/10.1021/acs.inorgchem.5c00526">10.1021/acs.inorgchem.5c00526</a>
  apa: Schmitz, L., Argüello Cordero, M. A., Al-Marri, M. J., Schoch, R., Egold, H.,
    Neuba, A., Steube, J., Bracht, B. J., Bokareva, O. S., Lochbrunner, S., &#38;
    Bauer, M. (2025). Chromophore Induced Effects in Iron(III) Complexes. <i>Inorganic
    Chemistry</i>, Article acs. inorgchem.5c00526. <a href="https://doi.org/10.1021/acs.inorgchem.5c00526">https://doi.org/10.1021/acs.inorgchem.5c00526</a>
  bibtex: '@article{Schmitz_Argüello Cordero_Al-Marri_Schoch_Egold_Neuba_Steube_Bracht_Bokareva_Lochbrunner_et
    al._2025, title={Chromophore Induced Effects in Iron(III) Complexes}, DOI={<a
    href="https://doi.org/10.1021/acs.inorgchem.5c00526">10.1021/acs.inorgchem.5c00526</a>},
    number={acs. inorgchem.5c00526}, journal={Inorganic Chemistry}, publisher={American
    Chemical Society (ACS)}, author={Schmitz, Lennart and Argüello Cordero, Miguel
    A. and Al-Marri, Mohammed J. and Schoch, Roland and Egold, Hans and Neuba, Adam
    and Steube, Jakob and Bracht, Bastian Johannes and Bokareva, Olga S. and Lochbrunner,
    Stefan and et al.}, year={2025} }'
  chicago: Schmitz, Lennart, Miguel A. Argüello Cordero, Mohammed J. Al-Marri, Roland
    Schoch, Hans Egold, Adam Neuba, Jakob Steube, et al. “Chromophore Induced Effects
    in Iron(III) Complexes.” <i>Inorganic Chemistry</i>, 2025. <a href="https://doi.org/10.1021/acs.inorgchem.5c00526">https://doi.org/10.1021/acs.inorgchem.5c00526</a>.
  ieee: 'L. Schmitz <i>et al.</i>, “Chromophore Induced Effects in Iron(III) Complexes,”
    <i>Inorganic Chemistry</i>, Art. no. acs. inorgchem.5c00526, 2025, doi: <a href="https://doi.org/10.1021/acs.inorgchem.5c00526">10.1021/acs.inorgchem.5c00526</a>.'
  mla: Schmitz, Lennart, et al. “Chromophore Induced Effects in Iron(III) Complexes.”
    <i>Inorganic Chemistry</i>, acs. inorgchem.5c00526, American Chemical Society
    (ACS), 2025, doi:<a href="https://doi.org/10.1021/acs.inorgchem.5c00526">10.1021/acs.inorgchem.5c00526</a>.
  short: L. Schmitz, M.A. Argüello Cordero, M.J. Al-Marri, R. Schoch, H. Egold, A.
    Neuba, J. Steube, B.J. Bracht, O.S. Bokareva, S. Lochbrunner, M. Bauer, Inorganic
    Chemistry (2025).
date_created: 2025-07-14T08:49:25Z
date_updated: 2025-08-15T12:18:08Z
department:
- _id: '306'
doi: 10.1021/acs.inorgchem.5c00526
keyword:
- Photo
language:
- iso: eng
publication: Inorganic Chemistry
publication_identifier:
  issn:
  - 0020-1669
  - 1520-510X
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: Chromophore Induced Effects in Iron(III) Complexes
type: journal_article
user_id: '48467'
year: '2025'
...
---
_id: '56075'
abstract:
- lang: eng
  text: An isostructural series of FeII, FeIII, and Fe(IV)complexes [Fe(ImP)2]0/+/2+
    utilizing the ImP 1,1′-(1,3-phenylene)-bis(3-methyl-1-imidazol-2-ylidene) ligand,
    combining N-heterocy-clic carbenes and cyclometalating functions, is presented.
    The strong donor motif stabilizes the high-valent Fe(IV) oxidation state yet keeps
    the FeII oxidation state accessible from the parent Fe(III)compound. Chemical
    oxidation of [Fe(ImP)2]+ yields stable [FeIV(ImP)2]2+. In contrast, [FeII(ImP)2]0,
    obtained by reduction,is highly sensitive toward oxygen. Exhaustive ground state
    characterization by single-crystal X-ray diffraction, 1H NMR,Mössbauer spectroscopy,
    temperature-dependent magnetic measurements, a combination of X-ray absorption
    near edge structureand valence-to-core, as well as core-to-core X-ray emission
    spectroscopy, complemented by detailed density functional theory (DFT) analysis,
    reveals that the three complexes[Fe(ImP)2]0/+/2+ can be unequivocally attributed
    to low-spin d6, d5, and d4 complexes. The excited state landscape of the Fe(II)
    and Fe(IV) complexes is characterized by short-lived 3MLCT and 3LMCT states, with
    lifetimes of 5.1 and 1.4 ps, respectively. In the FeII-compound, an energetically
    low-lying MC state leads to fast deactivation of the MLCT state. The distorted
    square-pyramidal state, where one carbene is dissociated, can not only relax into
    the ground state, but also into a singlet dissociated state. Its formation was
    investigated with time-dependent optical spectroscopy, while insights into its
    structure were gained by NMR spectroscopy.
author:
- first_name: Jakob
  full_name: Steube, Jakob
  id: '40342'
  last_name: Steube
  orcid: 0000-0003-3178-4429
- first_name: Lorena
  full_name: Fritsch, Lorena
  id: '44418'
  last_name: Fritsch
- first_name: Ayla
  full_name: Kruse, Ayla
  last_name: Kruse
- first_name: Olga S.
  full_name: Bokareva, Olga S.
  last_name: Bokareva
- first_name: Serhiy
  full_name: Demeshko, Serhiy
  last_name: Demeshko
- first_name: Hossam
  full_name: Elgabarty, Hossam
  id: '60250'
  last_name: Elgabarty
  orcid: 0000-0002-4945-1481
- first_name: Roland
  full_name: Schoch, Roland
  id: '48467'
  last_name: Schoch
  orcid: 0000-0003-2061-7289
- first_name: Mohammad
  full_name: Alaraby, Mohammad
  last_name: Alaraby
- first_name: Hans
  full_name: Egold, Hans
  id: '101'
  last_name: Egold
- first_name: Bastian Johannes
  full_name: Bracht, Bastian Johannes
  id: '86707'
  last_name: Bracht
- first_name: Lennart
  full_name: Schmitz, Lennart
  id: '53140'
  last_name: Schmitz
- first_name: Stephan
  full_name: Hohloch, Stephan
  last_name: Hohloch
- first_name: Thomas D.
  full_name: Kühne, Thomas D.
  last_name: Kühne
- first_name: Franc
  full_name: Meyer, Franc
  last_name: Meyer
- first_name: Oliver
  full_name: Kühn, Oliver
  last_name: Kühn
- first_name: Stefan
  full_name: Lochbrunner, Stefan
  last_name: Lochbrunner
- first_name: Matthias
  full_name: Bauer, Matthias
  id: '47241'
  last_name: Bauer
  orcid: 0000-0002-9294-6076
citation:
  ama: Steube J, Fritsch L, Kruse A, et al. Isostructural Series of a Cyclometalated
    Iron Complex in Three Oxidation States. <i>Inorganic Chemistry</i>. Published
    online 2024. doi:<a href="https://doi.org/10.1021/acs.inorgchem.4c02576">10.1021/acs.inorgchem.4c02576</a>
  apa: Steube, J., Fritsch, L., Kruse, A., Bokareva, O. S., Demeshko, S., Elgabarty,
    H., Schoch, R., Alaraby, M., Egold, H., Bracht, B. J., Schmitz, L., Hohloch, S.,
    Kühne, T. D., Meyer, F., Kühn, O., Lochbrunner, S., &#38; Bauer, M. (2024). Isostructural
    Series of a Cyclometalated Iron Complex in Three Oxidation States. <i>Inorganic
    Chemistry</i>. <a href="https://doi.org/10.1021/acs.inorgchem.4c02576">https://doi.org/10.1021/acs.inorgchem.4c02576</a>
  bibtex: '@article{Steube_Fritsch_Kruse_Bokareva_Demeshko_Elgabarty_Schoch_Alaraby_Egold_Bracht_et
    al._2024, title={Isostructural Series of a Cyclometalated Iron Complex in Three
    Oxidation States}, DOI={<a href="https://doi.org/10.1021/acs.inorgchem.4c02576">10.1021/acs.inorgchem.4c02576</a>},
    journal={Inorganic Chemistry}, publisher={American Chemical Society (ACS)}, author={Steube,
    Jakob and Fritsch, Lorena and Kruse, Ayla and Bokareva, Olga S. and Demeshko,
    Serhiy and Elgabarty, Hossam and Schoch, Roland and Alaraby, Mohammad and Egold,
    Hans and Bracht, Bastian Johannes and et al.}, year={2024} }'
  chicago: Steube, Jakob, Lorena Fritsch, Ayla Kruse, Olga S. Bokareva, Serhiy Demeshko,
    Hossam Elgabarty, Roland Schoch, et al. “Isostructural Series of a Cyclometalated
    Iron Complex in Three Oxidation States.” <i>Inorganic Chemistry</i>, 2024. <a
    href="https://doi.org/10.1021/acs.inorgchem.4c02576">https://doi.org/10.1021/acs.inorgchem.4c02576</a>.
  ieee: 'J. Steube <i>et al.</i>, “Isostructural Series of a Cyclometalated Iron Complex
    in Three Oxidation States,” <i>Inorganic Chemistry</i>, 2024, doi: <a href="https://doi.org/10.1021/acs.inorgchem.4c02576">10.1021/acs.inorgchem.4c02576</a>.'
  mla: Steube, Jakob, et al. “Isostructural Series of a Cyclometalated Iron Complex
    in Three Oxidation States.” <i>Inorganic Chemistry</i>, American Chemical Society
    (ACS), 2024, doi:<a href="https://doi.org/10.1021/acs.inorgchem.4c02576">10.1021/acs.inorgchem.4c02576</a>.
  short: J. Steube, L. Fritsch, A. Kruse, O.S. Bokareva, S. Demeshko, H. Elgabarty,
    R. Schoch, M. Alaraby, H. Egold, B.J. Bracht, L. Schmitz, S. Hohloch, T.D. Kühne,
    F. Meyer, O. Kühn, S. Lochbrunner, M. Bauer, Inorganic Chemistry (2024).
date_created: 2024-09-05T11:34:20Z
date_updated: 2025-08-15T12:17:35Z
department:
- _id: '306'
doi: 10.1021/acs.inorgchem.4c02576
keyword:
- Photo
language:
- iso: eng
publication: Inorganic Chemistry
publication_identifier:
  issn:
  - 0020-1669
  - 1520-510X
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: Isostructural Series of a Cyclometalated Iron Complex in Three Oxidation States
type: journal_article
user_id: '48467'
year: '2024'
...
---
_id: '56074'
abstract:
- lang: eng
  text: Effective photoinduced charge transfer makes molecular bimetallic assemblies
    attractive for applications as active light‐induced proton reduction systems.
    Developing competitive base metal dyads is mandatory for a more sustainable future.
    However, the electron transfer mechanisms from the photosensitizer to the proton
    reduction catalyst in base metal dyads remain so far unexplored. A Fe─Co dyad
    that exhibits photocatalytic H2 production activity is studied using femtosecond
    X‐ray emission spectroscopy, complemented by ultrafast optical spectroscopy and
    theoretical time‐dependent DFT calculations, to understand the electronic and
    structural dynamics after photoexcitation and during the subsequent charge transfer
    process from the Fe(II) photosensitizer to the cobaloxime catalyst. This novel
    approach enables the simultaneous measurement of the transient X‐ray emission
    at the iron and cobalt K‐edges in a two‐color experiment. With this methodology,
    the excited state dynamics are correlated to the electron transfer processes,
    and evidence of the Fe→Co electron transfer as an initial step of proton reduction
    activity is unraveled.
author:
- first_name: Michał
  full_name: Nowakowski, Michał
  id: '78878'
  last_name: Nowakowski
  orcid: 0000-0002-3734-7011
- first_name: Marina
  full_name: Huber‐Gedert, Marina
  last_name: Huber‐Gedert
- first_name: Hossam
  full_name: Elgabarty, Hossam
  id: '60250'
  last_name: Elgabarty
  orcid: 0000-0002-4945-1481
- first_name: Aleksandr
  full_name: Kalinko, Aleksandr
  last_name: Kalinko
- first_name: Jacek
  full_name: Kubicki, Jacek
  last_name: Kubicki
- first_name: Ahmet
  full_name: Kertmen, Ahmet
  last_name: Kertmen
- first_name: Natalia
  full_name: Lindner, Natalia
  last_name: Lindner
- first_name: Dmitry
  full_name: Khakhulin, Dmitry
  last_name: Khakhulin
- first_name: Frederico A.
  full_name: Lima, Frederico A.
  last_name: Lima
- first_name: Tae‐Kyu
  full_name: Choi, Tae‐Kyu
  last_name: Choi
- first_name: Mykola
  full_name: Biednov, Mykola
  last_name: Biednov
- first_name: Lennart
  full_name: Schmitz, Lennart
  id: '53140'
  last_name: Schmitz
- first_name: Natalia
  full_name: Piergies, Natalia
  last_name: Piergies
- first_name: Peter
  full_name: Zalden, Peter
  last_name: Zalden
- first_name: Katerina
  full_name: Kubicek, Katerina
  last_name: Kubicek
- first_name: Angel
  full_name: Rodriguez‐Fernandez, Angel
  last_name: Rodriguez‐Fernandez
- first_name: Mohammad Alaraby
  full_name: Salem, Mohammad Alaraby
  last_name: Salem
- first_name: Sophie E.
  full_name: Canton, Sophie E.
  last_name: Canton
- first_name: Christian
  full_name: Bressler, Christian
  last_name: Bressler
- first_name: Thomas D.
  full_name: Kühne, Thomas D.
  last_name: Kühne
- first_name: Wojciech
  full_name: Gawelda, Wojciech
  last_name: Gawelda
- first_name: Matthias
  full_name: Bauer, Matthias
  id: '47241'
  last_name: Bauer
  orcid: 0000-0002-9294-6076
citation:
  ama: Nowakowski M, Huber‐Gedert M, Elgabarty H, et al. Ultrafast Two‐Color X‐Ray
    Emission Spectroscopy Reveals Excited State Landscape in a Base Metal Dyad. <i>Advanced
    Science</i>. Published online 2024. doi:<a href="https://doi.org/10.1002/advs.202404348">10.1002/advs.202404348</a>
  apa: Nowakowski, M., Huber‐Gedert, M., Elgabarty, H., Kalinko, A., Kubicki, J.,
    Kertmen, A., Lindner, N., Khakhulin, D., Lima, F. A., Choi, T., Biednov, M., Schmitz,
    L., Piergies, N., Zalden, P., Kubicek, K., Rodriguez‐Fernandez, A., Salem, M.
    A., Canton, S. E., Bressler, C., … Bauer, M. (2024). Ultrafast Two‐Color X‐Ray
    Emission Spectroscopy Reveals Excited State Landscape in a Base Metal Dyad. <i>Advanced
    Science</i>. <a href="https://doi.org/10.1002/advs.202404348">https://doi.org/10.1002/advs.202404348</a>
  bibtex: '@article{Nowakowski_Huber‐Gedert_Elgabarty_Kalinko_Kubicki_Kertmen_Lindner_Khakhulin_Lima_Choi_et
    al._2024, title={Ultrafast Two‐Color X‐Ray Emission Spectroscopy Reveals Excited
    State Landscape in a Base Metal Dyad}, DOI={<a href="https://doi.org/10.1002/advs.202404348">10.1002/advs.202404348</a>},
    journal={Advanced Science}, publisher={Wiley}, author={Nowakowski, Michał and
    Huber‐Gedert, Marina and Elgabarty, Hossam and Kalinko, Aleksandr and Kubicki,
    Jacek and Kertmen, Ahmet and Lindner, Natalia and Khakhulin, Dmitry and Lima,
    Frederico A. and Choi, Tae‐Kyu and et al.}, year={2024} }'
  chicago: Nowakowski, Michał, Marina Huber‐Gedert, Hossam Elgabarty, Aleksandr Kalinko,
    Jacek Kubicki, Ahmet Kertmen, Natalia Lindner, et al. “Ultrafast Two‐Color X‐Ray
    Emission Spectroscopy Reveals Excited State Landscape in a Base Metal Dyad.” <i>Advanced
    Science</i>, 2024. <a href="https://doi.org/10.1002/advs.202404348">https://doi.org/10.1002/advs.202404348</a>.
  ieee: 'M. Nowakowski <i>et al.</i>, “Ultrafast Two‐Color X‐Ray Emission Spectroscopy
    Reveals Excited State Landscape in a Base Metal Dyad,” <i>Advanced Science</i>,
    2024, doi: <a href="https://doi.org/10.1002/advs.202404348">10.1002/advs.202404348</a>.'
  mla: Nowakowski, Michał, et al. “Ultrafast Two‐Color X‐Ray Emission Spectroscopy
    Reveals Excited State Landscape in a Base Metal Dyad.” <i>Advanced Science</i>,
    Wiley, 2024, doi:<a href="https://doi.org/10.1002/advs.202404348">10.1002/advs.202404348</a>.
  short: M. Nowakowski, M. Huber‐Gedert, H. Elgabarty, A. Kalinko, J. Kubicki, A.
    Kertmen, N. Lindner, D. Khakhulin, F.A. Lima, T. Choi, M. Biednov, L. Schmitz,
    N. Piergies, P. Zalden, K. Kubicek, A. Rodriguez‐Fernandez, M.A. Salem, S.E. Canton,
    C. Bressler, T.D. Kühne, W. Gawelda, M. Bauer, Advanced Science (2024).
date_created: 2024-09-05T11:31:30Z
date_updated: 2025-08-15T12:49:56Z
department:
- _id: '306'
doi: 10.1002/advs.202404348
keyword:
- Photo
- Xray
language:
- iso: eng
publication: Advanced Science
publication_identifier:
  issn:
  - 2198-3844
  - 2198-3844
publication_status: published
publisher: Wiley
status: public
title: Ultrafast Two‐Color X‐Ray Emission Spectroscopy Reveals Excited State Landscape
  in a Base Metal Dyad
type: journal_article
user_id: '48467'
year: '2024'
...