[{"status":"public","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."}],"type":"journal_article","publication":"Inorganic Chemistry","language":[{"iso":"eng"}],"article_number":"acs.inorgchem.5c00526","keyword":["Photo"],"user_id":"48467","department":[{"_id":"306"}],"_id":"60600","citation":{"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).","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>.","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} }","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>","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>","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>."},"year":"2025","publication_status":"published","publication_identifier":{"issn":["0020-1669","1520-510X"]},"doi":"10.1021/acs.inorgchem.5c00526","title":"Chromophore Induced Effects in Iron(III) Complexes","author":[{"id":"53140","full_name":"Schmitz, Lennart","last_name":"Schmitz","first_name":"Lennart"},{"first_name":"Miguel A.","last_name":"Argüello Cordero","full_name":"Argüello Cordero, Miguel A."},{"first_name":"Mohammed J.","last_name":"Al-Marri","full_name":"Al-Marri, Mohammed J."},{"first_name":"Roland","full_name":"Schoch, Roland","id":"48467","orcid":"0000-0003-2061-7289","last_name":"Schoch"},{"full_name":"Egold, Hans","id":"101","last_name":"Egold","first_name":"Hans"},{"full_name":"Neuba, Adam","last_name":"Neuba","first_name":"Adam"},{"first_name":"Jakob","id":"40342","full_name":"Steube, Jakob","last_name":"Steube","orcid":"0000-0003-3178-4429"},{"last_name":"Bracht","id":"86707","full_name":"Bracht, Bastian Johannes","first_name":"Bastian Johannes"},{"first_name":"Olga S.","last_name":"Bokareva","full_name":"Bokareva, Olga S."},{"last_name":"Lochbrunner","full_name":"Lochbrunner, Stefan","first_name":"Stefan"},{"first_name":"Matthias","last_name":"Bauer","orcid":"0000-0002-9294-6076","id":"47241","full_name":"Bauer, Matthias"}],"date_created":"2025-07-14T08:49:25Z","date_updated":"2025-08-15T12:18:08Z","publisher":"American Chemical Society (ACS)"},{"keyword":["Photo"],"language":[{"iso":"eng"}],"_id":"56075","department":[{"_id":"306"}],"user_id":"48467","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."}],"status":"public","publication":"Inorganic Chemistry","type":"journal_article","title":"Isostructural Series of a Cyclometalated Iron Complex in Three Oxidation States","doi":"10.1021/acs.inorgchem.4c02576","publisher":"American Chemical Society (ACS)","date_updated":"2025-08-15T12:17:35Z","author":[{"first_name":"Jakob","id":"40342","full_name":"Steube, Jakob","last_name":"Steube","orcid":"0000-0003-3178-4429"},{"last_name":"Fritsch","id":"44418","full_name":"Fritsch, Lorena","first_name":"Lorena"},{"first_name":"Ayla","last_name":"Kruse","full_name":"Kruse, Ayla"},{"first_name":"Olga S.","full_name":"Bokareva, Olga S.","last_name":"Bokareva"},{"full_name":"Demeshko, Serhiy","last_name":"Demeshko","first_name":"Serhiy"},{"full_name":"Elgabarty, Hossam","id":"60250","last_name":"Elgabarty","orcid":"0000-0002-4945-1481","first_name":"Hossam"},{"last_name":"Schoch","orcid":"0000-0003-2061-7289","id":"48467","full_name":"Schoch, Roland","first_name":"Roland"},{"first_name":"Mohammad","last_name":"Alaraby","full_name":"Alaraby, Mohammad"},{"id":"101","full_name":"Egold, Hans","last_name":"Egold","first_name":"Hans"},{"last_name":"Bracht","id":"86707","full_name":"Bracht, Bastian Johannes","first_name":"Bastian Johannes"},{"first_name":"Lennart","last_name":"Schmitz","id":"53140","full_name":"Schmitz, Lennart"},{"first_name":"Stephan","last_name":"Hohloch","full_name":"Hohloch, Stephan"},{"full_name":"Kühne, Thomas D.","last_name":"Kühne","first_name":"Thomas D."},{"first_name":"Franc","last_name":"Meyer","full_name":"Meyer, Franc"},{"first_name":"Oliver","last_name":"Kühn","full_name":"Kühn, Oliver"},{"first_name":"Stefan","full_name":"Lochbrunner, Stefan","last_name":"Lochbrunner"},{"first_name":"Matthias","last_name":"Bauer","orcid":"0000-0002-9294-6076","id":"47241","full_name":"Bauer, Matthias"}],"date_created":"2024-09-05T11:34:20Z","year":"2024","citation":{"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>.","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>","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).","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>.","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} }"},"publication_identifier":{"issn":["0020-1669","1520-510X"]},"publication_status":"published"},{"keyword":["Photo","Xray"],"language":[{"iso":"eng"}],"_id":"56074","department":[{"_id":"306"}],"user_id":"48467","abstract":[{"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.","lang":"eng"}],"status":"public","publication":"Advanced Science","type":"journal_article","title":"Ultrafast Two‐Color X‐Ray Emission Spectroscopy Reveals Excited State Landscape in a Base Metal Dyad","doi":"10.1002/advs.202404348","publisher":"Wiley","date_updated":"2025-08-15T12:49:56Z","date_created":"2024-09-05T11:31:30Z","author":[{"first_name":"Michał","orcid":"0000-0002-3734-7011","last_name":"Nowakowski","full_name":"Nowakowski, Michał","id":"78878"},{"full_name":"Huber‐Gedert, Marina","last_name":"Huber‐Gedert","first_name":"Marina"},{"full_name":"Elgabarty, Hossam","id":"60250","orcid":"0000-0002-4945-1481","last_name":"Elgabarty","first_name":"Hossam"},{"first_name":"Aleksandr","full_name":"Kalinko, Aleksandr","last_name":"Kalinko"},{"first_name":"Jacek","last_name":"Kubicki","full_name":"Kubicki, Jacek"},{"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"},{"last_name":"Lima","full_name":"Lima, Frederico A.","first_name":"Frederico A."},{"last_name":"Choi","full_name":"Choi, Tae‐Kyu","first_name":"Tae‐Kyu"},{"last_name":"Biednov","full_name":"Biednov, Mykola","first_name":"Mykola"},{"full_name":"Schmitz, Lennart","id":"53140","last_name":"Schmitz","first_name":"Lennart"},{"first_name":"Natalia","full_name":"Piergies, Natalia","last_name":"Piergies"},{"full_name":"Zalden, Peter","last_name":"Zalden","first_name":"Peter"},{"last_name":"Kubicek","full_name":"Kubicek, Katerina","first_name":"Katerina"},{"first_name":"Angel","last_name":"Rodriguez‐Fernandez","full_name":"Rodriguez‐Fernandez, Angel"},{"first_name":"Mohammad Alaraby","full_name":"Salem, Mohammad Alaraby","last_name":"Salem"},{"full_name":"Canton, Sophie E.","last_name":"Canton","first_name":"Sophie E."},{"full_name":"Bressler, Christian","last_name":"Bressler","first_name":"Christian"},{"last_name":"Kühne","full_name":"Kühne, Thomas D.","first_name":"Thomas D."},{"last_name":"Gawelda","full_name":"Gawelda, Wojciech","first_name":"Wojciech"},{"first_name":"Matthias","id":"47241","full_name":"Bauer, Matthias","orcid":"0000-0002-9294-6076","last_name":"Bauer"}],"year":"2024","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>","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>.","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>.","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).","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>.","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} }","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>"},"publication_identifier":{"issn":["2198-3844","2198-3844"]},"publication_status":"published"}]