Mainz 2017 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 18: Biomolecules and Electron Transfer

MO 18.3: Vortrag

Freitag, 10. März 2017, 11:30–11:45, N 25

Time-Resolved Measurement of Photoinduced Electron Transfer Processes in Perylene Diimides — •Robin C. Döring¹, Eduard Baal², Malcolm A. Bartlett², Christian Prinzisky², Remco W. A. Havenith^3,4, Jörg Sundermeyer², and Sangam Chatterjee^1,5 — ¹Faculty of Physics and Materials Sciences Center, Philipps-Universität Marburg, Germany — ²Faculty of Chemistry and Materials Sciences Center, Philipps-Universität Marburg, Germany — ³Zernike Institute for Advanced Materials, Stratingh Institute for Chemistry, University of Groningen, The Netherlands — ⁴Ghent Quantum Chemistry Group, Department of Inorganic and Physical Chemistry, Ghent University, Belgium — ⁵Institute of Experimental Physics I, Justus-Liebig-Universität Gießen, Germany

Perylene derivatives form an important model system for studies of electron transfer (ET) in (molecular) donor-acceptor dye systems. Here, we introduce highly soluble perylene dihydrazides (PDH). We compare the PDH electron-transfer dynamics with a series of bisalkylperylene diimides. Time-resolved photoluminescence and photoluminescence excitation spectroscopy (PLE) measurements are performed. All samples show non-single-exponential decay dynamics. A rate-equation analysis including a shallow shelving state is able to reproduce the experimental data. Time-dependent density functional theory calculations of the triplet states supported by PLE measurements give evidence of rapid forward and reverse intersystem-crossing between the emissive and the triplet state.