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Integrating DNA Photonic Wires into Light-Harvesting Supramolecular Polymers

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Kownacki Mariusz, Langenegger Simon M., Liu Shi-Xia, Häner Robert,
Project From DNA-Assembled Oligochromophores to Supramolecular Polymers: Aromatic Oligophosphates as Versatile Building Blocks for Functional Materials
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Original article (peer-reviewed)

Journal Angewandte Chemie International Edition
Volume (Issue) 58(3)
Page(s) 751 - 755
Title of proceedings Angewandte Chemie International Edition
DOI 10.1002/anie.201809914

Open Access

URL https://boris.unibe.ch/cgi/users/home?screen=EPrint%3A%3AView&eprintid=120881
Type of Open Access Repository (Green Open Access)

Abstract

An approach combining DNA nanoscaffolds with supramolecular polymers for the efficient and directional propagation of light‐harvesting cascades has been developed. A series of photonic wires with different arrangements of fluorophores in DNA‐organized nanostructures were linked to light‐harvesting supramolecular phenanthrene polymers (SPs) in a self‐assembled fashion. Among them, a light harvesting complex (LHC) composed of SPs and a photonic wire of phenanthrene, Cy3, Cy5 and Cy5.5 chromophores reveals a remarkable energy transfer efficiency of 59%. Stepwise transfer of the excitation energy collected by the light‐harvesting SPs via the intermediate Cy3 and Cy5 chromophores to the final Cy5.5 acceptor proceeds by a Förster resonance energy transfer mechanism. In addition, the light‐harvesting properties are documented by antenna effects ranging from 1.4 up to 23 for different LHCs.
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