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Hannover 2020 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 4: Electronic Spectroscopy I

MO 4.7: Vortrag

Montag, 9. März 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 Brixner11Institut 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)

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