Dresden 2020 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Molecular Electronics and Excited State Properties II

CPP 20.5: Talk

Monday, March 16, 2020, 16:00–16:15, ZEU 260

Two-dimensional electronic spectroscopy of phthalocyanine on rare gas clusters — •Ulrich Bangert, Lukas Bruder, Marcel Binz, Friedemann Landmesser, Elena Leissler, Daniel Uhl, and Frank Stienkemeier — Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany

With the recent advances of two-dimensional electronic spectroscopy (2DES) towards the gas phase, versatile samples like rare gas cluster beams become accessible [1]. Doping rare gas clusters with multiple molecules yields well defined many body systems. These systems are comparable to highly dilute thin film, however feature weak interaction with the substrate and are cooled down to ≤10 K. In previous experiments, such systems provided valuable details about singlet fission and super radiance in acene molecules [2,3]. We now apply for the first time 2DES to this approach and study free-base phthalocyanine in different environments: embedded in superfluid helium nanodroplets, deposited on the surface of neon clusters and as a thermal vapor. We find distinct differences in the photodynamics of the molecular assemblies.

[1] L. Bruder et al., J. Phys. B: At. Mol. Opt. Phys. 52 183501 (2019).

[2] S. Izadnia et al., J. Phys. Chem. Lett. 8, 2068 (2017).

[3] M. Müller et al., Phys. Rev. B 92 (12), 121408 (2015).