Photophysics of Anionic Bis(4H-imidazolato)CuI Complexes
Seidler B, Tran JH, Hniopek J, Traber P, Gorls H, Gräfe S, Schmitt M, Popp J, Schulz M, Dietzek-Ivansic B (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 28
Article Number: e202202697
Journal Issue: 72
Abstract
In this paper, the photophysical behavior of four panchromatically absorbing, homoleptic bis(4H-imidazolato)CuI complexes, with a systematic variation in the electron-withdrawing properties of the imidazolate ligand, were studied by wavelength-dependent time-resolved femtosecond transient absorption spectroscopy. Excitation at 400, 480, and 630 nm populates metal-to-ligand charge transfer, intraligand charge transfer, and mixed-character singlet states. The pump wavelength-dependent transient absorption data were analyzed by a recently established 2D correlation approach. Data analysis revealed that all excitation conditions yield similar excited-state dynamics. Key to the excited-state relaxation is fast, sub-picosecond pseudo-Jahn-Teller distortion, which is accompanied by the relocalization of electron density onto a single ligand from the initially delocalized state at Franck-Condon geometry. Subsequent intersystem crossing to the triplet manifold is followed by a sub-100 ps decay to the ground state. The fast, nonradiative decay is rationalized by the low triplet-state energy as found by DFT calculations, which suggest perspective treatment at the strong coupling limit of the energy gap law.
Involved external institutions
Germany (DE)How to cite
APA:
Seidler, B., Tran, J.H., Hniopek, J., Traber, P., Gorls, H., Gräfe, S.,... Dietzek-Ivansic, B. (2022). Photophysics of Anionic Bis(4H-imidazolato)CuI Complexes. Chemistry - A European Journal, 28(72). https://doi.org/10.1002/chem.202202697
MLA:
Seidler, Bianca, et al. "Photophysics of Anionic Bis(4H-imidazolato)CuI Complexes." Chemistry - A European Journal 28.72 (2022).
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