TY  - JOUR
AB  - 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 FeII 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.
AU  - Nowakowski, Michal
AU  - Huber-Gedert, Marina
AU  - Elgabarty, Hossam
AU  - Kalinko, Aleksandr
AU  - Kubicki, Jacek
AU  - Kertmen, Ahmet
AU  - Lindner, Natalia
AU  - Khakhulin, Dmitry
AU  - Alves Lima, Frederico
AU  - Choi, Tae-Kyu
AU  - Biednov, Mykola
AU  - Schmitz, Lennart
AU  - Piergies, Natalia
AU  - Zalden, Peter Erhard
AU  - Kubiček, Katharina
AU  - Rodriguez-Fernandez, Angel
AU  - Salem, Mohammad Alaraby
AU  - Canton, Sophie E.
AU  - Bressler, Christian
AU  - Kühne, Thomas
AU  - Gawelda, Wojciech
AU  - Bauer, Matthias
DO  - 10.17619/UNIPB/1-2139
PB  - Universitätsbibliothek
DP  - Universität Paderborn
LA  - eng
PY  - 2024
SN  - 2198-3844
SP  - 1 Online-Ressource (Seite 1-11) Diagramme
T2  - Advanced science
TI  - Ultrafast two-color x-ray emission spectroscopy reveals excited state landscape in a base metal dyad
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:466:2-53477
Y2  - 2026-02-05T11:32:35
ER  -