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Macroscopic Gold Cluster Helical Tendrils.

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Researchers created centimeter-scale macroscopic helices using gold clusters and halogen bonding. This breakthrough enables controllable chiral amplification and the design of advanced helical superstructures.

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Nanotechnology

Background:

  • Macroscopic helical superstructures are crucial for chirality transfer and high-performance devices.
  • Bottom-up self-assembly often struggles with disorder, hindering the creation of large-scale helical structures.

Purpose of the Study:

  • To demonstrate the self-assembly of tetragold clusters into macroscopic helices.
  • To achieve handedness-controllable helical superstructures through hierarchical assembly.

Main Methods:

  • Utilizing halogen bonding to direct hierarchical self-assembly from nanotubes to macrohelices.
  • Employing sacrificial template synthesis with solvent-corrosion to remove templates and form helical skeletons.
  • Using chiral halogen bonding donors for controlled synthesis of homochiral structures.

Main Results:

  • Successfully assembled tetragold clusters into centimeter-scale macroscopic helices.
  • Demonstrated hierarchical self-assembly driven by halogen bonding, overcoming disorder accumulation.
  • Achieved controllable synthesis of homochiral macroscopic tendrils with high-fidelity chiral amplification.

Conclusions:

  • Tetragold clusters can form macroscopic helices via a halogen-bond-induced hierarchical self-assembly pathway.
  • Sacrificial template synthesis is effective for creating pure helical skeletons.
  • This method allows for controllable chiral amplification, advancing the development of macroscopic helical superstructures.