Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 6: Metal Complexes
MO 6.6: Vortrag
Montag, 11. März 2019, 15:30–15:45, S HS 001 Biologie
Time-resolved spectroscopy of the charge separation in Zn(III)-Au(III)-porphyrin dyads — •Ayla Päpcke1, Sebastian Preiß2, Katja Heinze2, and Stefan Lochbrunner1 — 1Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23, 18059 Rostock — 2Institut für Anorganische und Analytische Chemie, Johannes Gutenberg Universität Mainz, Duesbergweg 10-14, 55128 Mainz
To convert sunlight into chemical energy photoinduced energy transfer and electron transfer processes within the photosynthetic components are essential. Bioinspired systems contain porphyrins to mimic the role of chlorophyll in natural photosynthesis. Porphyrins are desired photosensitizers because of the easy functionalization, the strong absorption in the visible region, the often high fluorescence yield and the easy tunable redox properties [1].
Recently, gold(III) porphyrin cations have been used as electron acceptors in photosynthetic charge-separation [2]. Applying ultrafast transient absorption and time resolved photoluminescence spectroscopy we investigated the photoinduced electron transfer process of Zn(III)-Au(III)-porphyrin dyads and the dynamics of the formation of the Au(II) species.
[1] P. K. Poddutoori, et al., Phys. Chem. Chem. Phys. 17, 26346-26358 (2015)
[2] S. Preiß, et al., Nat. Chem. 9, 1249-1255 (2017)