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Hexagonal array formation by intermolecular halogen bonding using a binary blend of linear building blocks: STM

Yoshihiro Kikkawa1, Mayumi Nagasaki1, Emiko Koyama1

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Researchers created hexagonal molecular arrays using halogen bonding between two building blocks. The pyridine N atom

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Area of Science:

  • Supramolecular chemistry
  • Materials science
  • Crystallography

Background:

  • Intermolecular interactions are crucial for self-assembly.
  • Halogen bonding offers directional control in molecular organization.
  • Designing molecular building blocks is key to creating ordered structures.

Purpose of the Study:

  • To investigate the formation of hexagonal arrays using halogen bonding.
  • To understand the role of molecular structure in self-assembly.
  • To explore the influence of pyridine N atom substitution on crystal packing.

Main Methods:

  • Fabrication of bicomponent blends of linear molecular building blocks.
  • Utilizing intermolecular halogen bonding for self-assembly.
  • Analysis of crystal structures and packing arrangements.

Main Results:

  • Successfully fabricated hexagonal arrays through intermolecular halogen bonding.
  • Demonstrated that the substitution position of the pyridine N atom is critical.
  • Identified specific arrangements leading to hexagonal structures.

Conclusions:

  • Intermolecular halogen bonding is an effective strategy for creating ordered molecular arrays.
  • Molecular design, specifically the position of the pyridine N atom, dictates the self-assembly outcome.
  • This work provides insights into controlling crystal structures via halogen bonding.