Overview of project C04

Time-Resolved 2D-IR-Spectroscopy at Adsorbate Layers


The temporal evolution in selectively vibrationally excited adsorbat monolayers is studied using time and frequency resolved pump-probe-spectroscopy. This allows us to directly observe the chain of modes and their branching which are populated with evolving time. This approach provides detailed insights into the coupling of vibrational modes. Studies with alkyl- and polyen-molecules of different lengths allow us to observe the propagation of the excess energy along the chains. Langmuir-Blodgett films of different packing density detail the influence of intermolecular interactions on the vibrational dynamics.




Michael Lackner, Marvin Hille and Eckart Hasselbrink
Vibrational Energy Redistribution between CH Stretching Modes in Alkyl Chain Monolayers Revealed by Time-Resolved Two-Color Pump-Probe Sum Frequency Spectroscopy
J. Phys. Chem. Lett. 11, 108 (2020)
DOI: 10.1021/acs.jpclett.9b03386



Matthias Linke, Marvin Hille, Michael Lackner, Ludmilla Schumacher, Sebastian Schlücker and Eckart Hasselbrink
Plasmonic Effects of Au Nanoparticles on the Vibrational Sum Frequency Spectrum of 4-Nitrothiophenol
J. Phys. Chem. C 123, 24234 (2019)
DOI: 10.1021/acs.jpcc.9b05207



Michael Lackner, Daniel Lucaßen and Eckart Hasselbrink
Bimodal Velocity Distributions in the Photodesorption of CO from Si(100) Suggest V-to-T Energy Transfer
Chem. Phys. Lett. 713, 277 (2018)
DOI: 10.1016/j.cplett.2018.10.048