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Researchers developed new synthetic foldamers that mimic biomacromolecule folding. These novel anthracene-based foldamers exhibit efficient through-space charge transport, demonstrating high single-molecule conductance.

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Area of Science:

  • Supramolecular Chemistry
  • Organic Electronics
  • Biomimetic Materials

Background:

  • Biomacromolecule folding is essential for biological function.
  • Synthetic systems that mimic folding can lead to new functionalities.
  • Foldamers are conformationally ordered synthetic oligomers designed to fold.

Purpose of the Study:

  • To design and synthesize a new family of foldamers.
  • To investigate the conformational properties and charge transport capabilities of these foldamers.
  • To explore the potential of foldamers in molecular electronics.

Main Methods:

  • Synthesis of anthracene-containing foldamers with varying numbers of anthracene units.
  • Characterization of foldamer conformation using intramolecular hydrogen bonds and aromatic interactions.
  • Single-molecule conductance measurements using scanning tunnelling microscopy-based break-junction technique.

Main Results:

  • A new family of foldamers adopting a sigmoidal conformation was successfully synthesized.
  • The folded structure creates an efficient through-space charge transport channel.
  • Exceptionally high conductance values (10^-1 G0) and a low decay constant (0.02 Å^-1) were measured.

Conclusions:

  • These anthracene-based foldamers exhibit superior charge transport properties compared to existing through-space pathways.
  • The designed foldamers represent a promising platform for developing novel molecular electronic devices.
  • Mimicking biomacromolecule folding in synthetic systems opens new avenues for functional materials.