Integrating DNA Photonic Wires into Light‐Harvesting Supramolecular Polymers. (14th November 2018)

• Record Type: Journal Article
• Authors: Kownacki, Mariusz; Langenegger, Simon M.; Liu, Shi‐Xia; Häner, Robert
• Is Part Of: Angewandte Chemie. Volume 131:Number 3(2019)
• Page Start: 761
• Page End: 765
• Publication Date: 2018-11-14
• Subjects: DNA -- FRET -- Lichtsammelnde Antennen -- Photonische Drähte -- Supramolekulare Polymere; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201809914
• Languages: English
• ISSNs: 0044-8249

Abstract

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 through 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.