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Chirality controlled responsive self-assembled nanotubes in water.

D J van Dijken1, P Štacko1, M C A Stuart1,2

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Chirality controls dimensions in self-assembled nanotubes. Light-responsive molecules enable tunable formation of chiral or achiral nanotubes, storing and erasing chiral information.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Organic Chemistry

Background:

  • Chirality is crucial for molecular recognition and biological function.
  • Controlling self-assembly of chiral molecules into defined nanostructures remains a challenge.
  • Storing and erasing chiral information in materials is of significant interest.

Purpose of the Study:

  • To present a method for using chirality to dictate dimensions and store information in self-assembled nanotubes.
  • To demonstrate light-induced control over nanotube formation and chiral information.
  • To develop photoresponsive systems for dynamic control over nanostructures.

Main Methods:

  • Synthesis of a photoresponsive amphiphile and its chiral counterpart.
  • Co-assembly studies to form nanotubes.
  • Spectroscopic and microscopic characterization (e.g., UV-Vis, TEM, SEM).
  • Photo-disassembly experiments.

Main Results:

  • A photoresponsive amphiphile co-assembles with a chiral molecule to form nanotubes.
  • Chirality directs the formation of either long, achiral nanotubes or shorter, bundled chiral nanotubes.
  • Light irradiation triggers the disassembly of the nanotubes, erasing chiral information.

Conclusions:

  • Chirality can precisely control the dimensions and morphology of self-assembled nanotubes.
  • Photoresponsive systems offer a pathway for dynamic control and information storage/erasure in nanomaterials.
  • This work provides a foundation for developing switchable chiral nanomaterials.