Erlangen 2022 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 13: Femtosecond Spectroscopy III

MO 13.3: Vortrag

Mittwoch, 16. März 2022, 15:00–15:15, MO-H5

Time-resolved ultrafast spectroscopy of acene monomers and acene complexes in helium nanodroplets — •Audrey Scognamiglio, Nicolas Rendler, Katrin Dulitz, Lukas Bruder, and Frank Stienkemeier — Institute of Physics, University of Freiburg, Hermann-Herder Straße 3, 79104 Freiburg-im-Breisgau

The motivation to study acene molecules such as tetracene and pentacene originates from the recent interest in organic photovoltaics research (OPVs)[1]. Indeed, those molecules are known to produce multiple charge carriers through singlet fission, thus enhancing the efficiency of such devices[2], [3]. On the one hand, we experimentally study acene monomers in the gas phase to get insights into their energy-level structure, and into the possible intramolecular relaxation dynamics and associated time scales. On the other hand, we use the helium nanodroplet matrix isolation technique to synthesize complexes of two or more molecules. So far, experimental studies are available only for crystalline or solution-based systems. We present here time-resolved two-colour pump-probe studies on acene monomers and acene complexes, investigated using photoelectron imaging and high-resolution ion-time-of-flight mass spectrometry over a large mass/charge range.
[1] T. M. Clarke and J. R. Durrant, Chem. Rev., vol. 110(11), 2010 [2] P. M. Zimmerman et al., J. Am. Chem. Soc., vol. 133(49), 2011 [3] P. M. Zimmerman et al., Nat. Chem., vol. 2(8), 2010