Integrating DNA Photonic Wires into Light‐Harvesting Supramolecular Polymers

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.

Multivalent Ultrasensitive Interfacing of Supramolecular 1D Nanoplatforms

“…27−29 Interfacing DNA materials with supramolecular materials has shown great promise in generating emergent properties. 30−33 We and others have previously reported on the synthesis and study of supramolecular polymers featuring appended DNA strands as ligands for inducing specific interactions on a supramolecular platform. 33−38 Typically, the DNA-decorated supramolecular monomers self-assemble into nanoplatforms that present short single-stranded DNA overhangs, together effectively acting as a linear, 1D, multivalent scaffold (see Figure 1a).…”

Amphiphilic anthanthrene trimers that exfoliate graphite and individualize single wall carbon nanotubes

“…As illustrated in Scheme 1, synthesis of 1 was accomplished quantitatively by deprotection of the key precursor 5 under basic conditions with methanolic ammonia. Inspired by the solid-phase phosphoramidite chemistry, which has been widely employed in the synthesis of DNA sequences 30 or other oligomers, [31][32][33][34][35][36][37] 5 was readily prepared in a 30% yield via a dual coupling reaction of bis-phosphoramidite 3 and the monoacetylated derivative 4 using 5-(ethylthio)-1H-tetrazole as activator and tert-butyl hydroperoxide as oxidant. Both 3 and 4 were obtained from the corresponding anthanthrene-diol 2, which was formed through the Sonogashira cross-coupling reaction of 3-butyn-1-ol and 4,10-dibromo-6,12-bis(octyloxy) anthanthrene in 71% yield.…”

Synthetic strategies tailoring colours in multichromophoric organic nanostructures

“…In 2018, Kownacki et al described an approach to produce efficient light-harvesting complexes by combining DNA nanoscaffolds with supramolecular phenanthrene polymers (SPs). 52 Various LHCs were constructed, phenanthrene-containing A and cyanine-labelled B and C oligomers in a self-assembled fashion. Among them, complex 55 resulted in a photonic wire consisting of phenanthrene as the primary donor, Cy3 and Cy5 as intermediate donors and Cy5.5 as the acceptor (Fig.…”