Hannover 2020 – scientific programme
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MO: Fachverband Molekülphysik
MO 4: Electronic Spectroscopy I
MO 4.7: Talk
Monday, March 9, 2020, 15:45–16:00, f142
Exciton Interaction and Exciton Diffusion in Artificial Light-Harvesting Complexes Probed with High-Order Multidimensional Spectroscopy — •Julian Lüttig1, Björn Kriete2, Tenzin Kunsel2, Pavel Malý1, Thomas L. C. Jansen2, Jasper Knoester2, Maxim S. Pshenichnikov2, and Tobias Brixner1 — 1Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands
Two-dimensional electronic spectroscopy (2DES) has become a powerful tool for the investigation of single-exciton dynamics in various molecular systems, e.g., self-assembled artificial light-harvesting complexes. Here we use the recently developed technique of exciton–exciton-interaction two-dimensional (EEI2D) spectroscopy to disentangle the exciton dynamics in single-walled and double-walled tubular aggregates [1]. The technique of EEI2D spectroscopy allows us to follow the transport of excitons through the different systems by measuring exclusively exciton–exciton annihilation. We combine the technique of EEI2D spectroscopy with a microfluidic system to identify the influence of the supramolecular structure on the single- and double-exciton processes. EEI2D spectroscopy uncovers the different processes of exciton diffusion, energy transfer and exciton–exciton annihilation in these artificial-light harvesting complexes.
[1] B. Kriete et al., Nat. Commun. 10, 4651 (2019)