Constructing Molecular Networks on Metal Surfaces through Tellurium-Based Chalcogen-Organic Interaction

Area of Science:

• Supramolecular chemistry
• Materials science
• Surface science

Background:

• On-surface molecular self-assembly is key for creating functional nanostructures.
• Traditional methods rely on hydrogen bonding or metal coordination.
• Chalcogen bonding (ChB) is an underexplored interaction for on-surface assembly.

Purpose of the Study:

• To investigate tellurium-directed chalcogen-organic interactions for fabricating molecular networks.
• To explore the potential of chalcogen bonding in on-surface self-assembly.
• To create novel 2D molecular networks on Au(111) surfaces.

Main Methods:

• Utilizing carbonitrile molecules as building blocks.
• Fabricating molecular networks via tellurium-directed interactions on Au(111).
• Employing density functional theory (DFT) and scanning tunneling spectroscopy (STS) for characterization.

Main Results:

• Achieved extended 2D molecular networks with a 4-fold binding motif.
• Observed that Te-carbonitrile interactions are less stable than metal-organic coordination.
• Confirmed that Te-directed network construction does not alter molecular electronic properties.

Conclusions:

• Chalcogen-directed interactions offer a new avenue for supramolecular assembly.
• This approach expands strategies for designing advanced molecular architectures.
• The findings contribute to the development of novel nanomaterials for nanotechnological applications.