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Oligo-Quinolylene-Vinylene Foldamers.

Jinhua Wang1, Barbara Wicher2, Victor Maurizot1

  • 1CBMN (UMR5248), Univ. Bordeaux-CNRS-IPB, Institut Européen de Chimie et Biologie, 2 rue Escarpit, 33600, Pessac, France.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|September 4, 2020
PubMed
Summary
This summary is machine-generated.

Researchers synthesized novel foldamers by replacing amide bonds with vinylene groups. While fully vinylene oligomers were flat, those with mixed linkages retained helical structures, enabling tunable electronic properties.

Keywords:
conformation analysisfoldamersheliceshybrid sequencesisosteres

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Area of Science:

  • Organic Chemistry
  • Supramolecular Chemistry
  • Materials Science

Background:

  • Quinoline-based aromatic amide foldamers are recognized for their stable, folded conformations.
  • Foldamers offer precise control over molecular architecture and function.

Purpose of the Study:

  • To develop a synthetic strategy for foldamers incorporating vinylene linkages as amide bond isosteres.
  • To investigate the impact of vinylene incorporation on foldamer conformation and electronic properties.

Main Methods:

  • Synthesis of novel oligomers with varying ratios of amide and vinylene linkages.
  • Solution and solid-state structural studies (e.g., NMR, X-ray crystallography) to determine conformation.
  • Analysis of π-conjugation extension and potential charge transport properties.

Main Results:

  • Oligomers with exclusively vinylene linkages adopted flat conformations, lacking significant folding.
  • Foldamers with a vinylene segment flanked by oligoamides maintained helical structures, albeit with reduced curvature.
  • The incorporation of vinylene groups extended π-conjugation across the oligomer backbone.

Conclusions:

  • Vinylene linkages can be strategically incorporated into foldamer structures.
  • Mixed amide-vinylene foldamers offer a pathway to control both structural folding and electronic properties.
  • These findings open avenues for designing foldamers with tailored optoelectronic characteristics.