Anisotropic energy transfer in crystalline chromophore assemblies

Ritesh Haldar, Marius Jakoby, Antoine Mazel, Qiang Zhang, Alexander Welle, Tawheed Mohamed, Peter Krolla, Wolfgang Wenzel, Stéphane Diring, Fabrice Odobel, Bryce S. Richards, Ian A. Howard, Christof Wöll

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


An ideal material for photon harvesting must allow control of the exciton diffusion length and directionality. This is necessary in order to guide excitons to a reaction center, where their energy can drive a desired process. To reach this goal both of the following are required; short- and long-range structural order in the material and a detailed understanding of the excitonic transport. Here we present a strategy to realize crystalline chromophore assemblies with bespoke architecture. We demonstrate this approach by assembling anthracene dibenzoic acid chromophore into a highly anisotropic, crystalline structure using a layer-by-layer process. We observe two different types of photoexcited states; one monomer-related, the other excimer-related. By incorporating energy-accepting chromophores in this crystalline assembly at different positions, we demonstrate the highly anisotropic motion of the excimer-related state along the [010] direction of the chromophore assembly. In contrast, this anisotropic effect is inefficient for the monomer-related excited state.

Original languageEnglish
Article number4332
JournalNature Communications
Issue number1
Publication statusPublished - 1 Dec 2018

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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