Vibronic and vibrational coherences in two-dimensional electronic spectra of supramolecular J-aggregates

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

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)6007-6014
Number of pages8
JournalJournal of Physical Chemistry A
Volume117
Issue number29
DOIs
StatePublished - 25 Jul 2013
Externally publishedYes

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