Vibronic and Vibrational Coherences in Two-Dimensional Electronic Spectra of Supramolecular J-Aggregates

Autor(en)

Franz Milota, Valentyn I. Prokhorenko, Tomas Mancal, Hans von Berlepsch, Oliver Bixner, Harald F. Kauffmann, Juergen Hauer

Abstrakt

In J-aggregates of cyanine dyes, closely packed molecules form mesoscopic tubes with nanometer-diameter and micrometer-length. Their efficient energy transfer pathways make them suitable candidates for artificial light harvesting systems. This great potential calls for an in-depth spectroscopic analysis of the underlying energy deactivation network and coherence dynamics. We use two-dimensional electronic spectroscopy with sub-10 fs laser pulses in combination with two-dimensional decay-associated spectra analysis to describe the population flow within the aggregate. Based on the analysis of Fourier-transform amplitude maps, we distinguish between vibrational or vibronic coherence dynamics as the origin of pronounced oscillations in our two-dimensional electronic spectra.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Technische Universität Wien, Max-Planck-Institut für Struktur und Dynamik der Materie, Charles University Prague, Freie Universität Berlin (FU), Universität für Bodenkultur Wien

Journal

The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory

Band

117

Seiten

6007-6014

Anzahl der Seiten

8

ISSN

1089-5639

DOI

https://doi.org/10.1021/jp3119605

Publikationsdatum

07-2013

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/11c706c8-8665-47b3-a9e0-c9eaa8c219b0