期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 3, 页码 751-755出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201809914
关键词
DNA; FRET; light-harvesting antenna; photonic wires; supramolecular polymers
资金
- Swiss National Foundation [200020_169030]
- Swiss National Science Foundation (SNF) [200020_169030] Funding Source: Swiss National Science Foundation (SNF)
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 Forster 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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