Optically Controlled Electron Transfer in a Re(I) Complex
| Autor: | Eric Levillain, Olivier Alévêque, Silvio Decurtins, Yan Geng, Shi-Xia Liu, Andrea Cannizzo, Maryam Akbarimoosavi, Jürg Hauser, Latévi Max Lawson Daku, Thomas Feurer, Robert Häner, Robert J. Stanley, Egmont Rohwer |
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| Přispěvatelé: | University of Bern, University of Geneva [Switzerland], MOLTECH-Anjou, Université d'Angers (UA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Temple University [Philadelphia], Pennsylvania Commonwealth System of Higher Education (PCSHE) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Photocurrent
010405 organic chemistry Chemistry Organic Chemistry Phenazine General Chemistry 620 Engineering 010402 general chemistry Photochemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Electron transfer Absorption band Intramolecular force 540 Chemistry Ultrafast laser spectroscopy 570 Life sciences biology [CHIM.COOR]Chemical Sciences/Coordination chemistry Time-resolved spectroscopy Spectroscopy |
| Zdroj: | Chemistry-A European Journal Chemistry-A European Journal, Wiley-VCH Verlag, 2021, 27 (17), pp.5399-5403. ⟨10.1002/chem.202005125⟩ |
| ISSN: | 0947-6539 1521-3765 |
| DOI: | 10.1002/chem.202005125⟩ |
| Popis: | International audience; Ultrafast optical control of intramolecular charge flow was demonstrated, which paves the way for photocurrent modulation and switching with a highly wavelength‐selective ON/OFF ratio. The system that was explored is a fac‐[Re(CO)3(TTF‐DPPZ)Cl] complex, where TTF‐DPPZ=4’,5’‐bis(propylthio)tetrathiafulvenyl[i]dipyrido[3,2‐a:2’,3’‐c]phenazine. DFT calculations and AC‐Stark spectroscopy confirmed the presence of two distinct optically active charge‐transfer processes, namely a metal‐to‐ligand charge transfer (MLCT) and an intra‐ligand charge transfer (ILCT). Ultrafast transient absorption measurements showed that the ILCT state decays in the ps regime. Upon excitation to the MLCT state, only a long‐lived 3MLCT state was observed after 80 ps. Remarkably, however, the bleaching of the ILCT absorption band remained as a result of the effective inhibition of the HOMO–LUMO transition. |
| Databáze: | OpenAIRE |
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