Chiral kagomé lattice from simple ditopic molecular bricks

Area of Science:

• Supramolecular chemistry
• Materials science
• Surface science

Background:

• Self-assembly is crucial for creating ordered structures at the nanoscale.
• Precise control over molecular arrangement is key for advanced materials.
• Surface atomic lattices provide templates for directed molecular organization.

Purpose of the Study:

• To demonstrate supramolecular engineering of periodic networks on a surface.
• To investigate the effect of molecular length on network formation and structure.
• To achieve novel 2D organic network architectures using linear molecular building blocks.

Main Methods:

• Utilizing scanning tunneling microscopy (STM) for molecular-level observation.
• Employing self-assembly of de novo synthesized linear dicarbonitrile polyphenyl molecules.
• Fabricating ordered periodic networks on a surface atomic lattice.

Main Results:

• Demonstrated supramolecular engineering of complex, regular, long-range ordered 2D organic networks.
• Observed distinct changes in bonding motifs and surface tessellations with varying molecular lengths.
• Achieved diverse network structures including chevron, rhombic, and a novel chiral kagomé lattice.

Conclusions:

• Linear molecular bricks can be precisely controlled via self-assembly to form intricate 2D networks.
• Molecular length is a critical parameter influencing supramolecular architecture and surface patterns.
• This work introduces a new chiral kagomé lattice and demonstrates advanced control in surface-based supramolecular chemistry.