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- Title
Optically Controlled Electron Transfer in a Re<sup>I</sup> Complex.
- Authors
Rohwer, Egmont J.; Geng, Yan; Akbarimoosavi, Maryam; Daku, Latévi M. Lawson; Aleveque, Olivier; Levillain, Eric; Hauser, Jürg; Cannizzo, Andrea; Häner, Robert; Decurtins, Silvio; Stanley, Robert J.; Feurer, Thomas; Liu, Shi‐Xia
- Abstract
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.
- Subjects
CHARGE exchange; OPTICAL control; CHARGE transfer; CHARGE-transfer transitions; TIME-resolved spectroscopy; PHOTOCURRENTS; BLEACHING (Chemistry)
- Publication
Chemistry - A European Journal, 2021, Vol 27, Issue 17, p5399
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202005125