Ein DNA‐Fulleren‐Konjugat als Templat für supramolekulare Chromophorstapel: Auf dem Weg zu DNA‐basierten Solarzellen

Programmable, hierarchical assembly of DNA nanostructures with precise organisation of functional components have been demonstrated previously with tiled assembly and DNA origami. However, building organised nanostructures with random oligonucleotide strands remains as an elusive problem. Herein, a simple and general strategy, in which nanoclusters of a fullerene derivative act as stapler motifs in bringing ordered nanoscale assembly of short oligonucleotide duplexes into micrometre-sized nanowires, is described. In this approach, the fullerene derivative, by virtue of its amphiphilic structure and unique hydrophobic-hydrophilic balance, pre-assembles to form 3-5 nm sized clusters in a mixture of DMSO-phosphate buffer, which further assists the assembly of DNA strands. The optimum cluster size, availability of DNA anchoring motifs and the nature of the DNA strands controls the structure of these nanomaterials. Furthermore, horizontal conductivity measurements through conductive AFM confirmed the charge transport properties of these nanowires. The current strategy could be employed to organise random DNA duplexes and tiles into functional nanostructures, and hence, open up new avenues in DNA nanotechnology.

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Fullerene Cluster Assisted Self‐Assembly of Short DNA Strands into Semiconducting Nanowires

Vittala

Saraswathi

Joseph

2017

Chemistry A European J

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Programmable and Sequence‐Selective Supramolecular Assembly of Two Different Chromophores along DNA Templates

Hofsäß

Sinn

Biedermann

et al. 2018

Chemistry A European J

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The templated self-assembly of two different chromophores attached to the same binding motif gives oligomers of statistical mixtures without any control on the resulting chromophore sequence. The first self-assembled bichromophore system is reported, in which the resulting chromophore sequence is simply governed by the DNA template. A new ethynylpyrene-diaminopurine 2'-deoxynucleoside was combined with the ethynyl nile red-modified 2'-deoxyuridine to achieve this completely programmable sequence selective self-assembly. The helical ordering of the two different chromophores by DNA templates with different mixtures of A-T sequences yields precise control over the optical properties of the formed assemblies, which was proven by methods of optical spectroscopy.

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One Amine–3 Tasks: Reductive Coupling of Imines with Olefins in Batch and Flow

Lefebvre

Porta

Millet

et al. 2020

Chemistry A European J

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Owing to their wide range of biological properties, g-aminobutyric acid derivatives (GABA) have been extensively studied and foundn oteworthy industrial applications. However,a tom-economical and efficient processes for their production are scarce and would greatly benefit from further investigations.H erein, we demonstrate that an iridiumbased photocatalyst promotes the direct reductive cross-coupling of imines with olefins upon irradiation with visible light to give GABA derivatives in good yields and selectivities. We also stress the enablingt riple role of tributylamine additivei nt his process, discuss the advantages of strategies based on proton-coupled electron transfer (PCET) and demonstrate the scale-up of this reaction in continuous flow.

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Ein DNA‐Fulleren‐Konjugat als Templat für supramolekulare Chromophorstapel: Auf dem Weg zu DNA‐basierten Solarzellen

Abstract: Fulleren wurde kovalent mit einem (dA) 20

Cited by 8 publications

References 39 publications

Fullerene Cluster Assisted Self‐Assembly of Short DNA Strands into Semiconducting Nanowires

Fullerene Cluster Assisted Self‐Assembly of Short DNA Strands into Semiconducting Nanowires

Programmable and Sequence‐Selective Supramolecular Assembly of Two Different Chromophores along DNA Templates

One Amine–3 Tasks: Reductive Coupling of Imines with Olefins in Batch and Flow

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