Bonn 2025 – scientific programme

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MO: Fachverband Molekülphysik

MO 28: Ultrafast Dynamics IV

MO 28.6: Talk

Friday, March 14, 2025, 12:15–12:30, HS XVI

A systematic study of vibrational decoherence of PTCDA in different environments using two-dimensional electronic spectroscopy — •Yilin Li, Arne Morlok, Ulrich Bangert, Jakob Gerlach, Brendan Wouterlood, Frank Stienkemeier, and Lukas Bruder — Institute of Physics, University of Freiburg, Germany

We present a systematic study of the coupling and energy dissipation of vibrational modes in different environments, ranging from cold isolated molecules in the gas phase, to molecules embedded in different rare-gas cluster species and molecules dissolved in a solution at room temperature. As test molecule we chose 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) and apply femtosecond pump probe and two-dimensional electronic spectroscopy (2DES) [1,2]. This approach provides insight into the various aspects of vibrational decoherence, e.g. pure dephasing processes and energy dissipation into the environment, and can be applied in all environments, allowing for a direct comparison of the experimental results.

1. L. Bruder et al., Nat. Commun. (2018), 9, 4823

2. U. Bangert, F. Stienkemeier, L. Bruder, Nat. Commun. (2022), 13, 3350

Keywords: Coherent multidimensional electronic spectroscopy; Molecular dynamics; rare-gas cluster isolation spectroscopy