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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Self-assembly is driven by structure-encoded information in discrete entities.
  • The role of the surrounding media in self-assembly is often secondary to chemical design.

Purpose of the Study:

  • To investigate the influence of media design on self-assembly processes.
  • To demonstrate a novel method for creating hierarchical supramolecular structures.
  • To explore the role of solvent composition in controlling self-assembly pathways.

Main Methods:

  • Real-time observation using confocal microscopy.
  • Analysis of self-assembled structures using single-crystal X-ray diffraction.
  • Molecular simulations employing coarse-grained (CG) models.
  • Utilizing two isolated platinum(II) complexes with distinct emission colors.

Main Results:

  • Media composition can be more critical than chemical design in self-assembly.
  • A supramolecular homo-aggregate can be reversibly coated by a second component with a different crystal lattice.
  • The coating process is precisely controlled by narrow solvent compositions.
  • Hierarchical supramolecular structures can be constructed through this media-controlled coating mechanism.

Conclusions:

  • Solvent media plays a pivotal role in directing self-assembly pathways and outcomes.
  • A novel, reversible coating mechanism for supramolecular aggregates has been discovered.
  • This work presents a new strategy for the rational design of hierarchical supramolecular architectures.