Host-guest chemistry in two-dimensional supramolecular networks

Area of Science:

• Supramolecular chemistry
• Surface science
• Nanotechnology

Background:

• Nanoporous supramolecular networks on surfaces immobilize guest molecules.
• Host-guest chemistry in 2D porous networks is crucial for separation, catalysis, and nanoscale patterning.
• Diverse network topologies with high crystallinity capture various guest molecules.

Purpose of the Study:

• To review advancements in surface-supported host-guest chemistry.
• To highlight the role of scanning tunneling microscopy (STM) in studying these systems.
• To focus on rational design strategies for selective guest capture.

Main Methods:

• Studying host-guest architectures on solid surfaces using scanning tunneling microscopy (STM).
• Investigating systems under ambient conditions (solution-solid interface) and ultrahigh vacuum (UHV)-solid interface.
• Analyzing isoreticular host networks, functionalized pores, and dynamic host-guest systems.

Main Results:

• Demonstration of diverse structural topologies for molecular guest capture.
• Utilization of various non-covalent forces (hydrogen bonds, van der Waals, coordinate bonds) for network assembly.
• Implementation of rational design for controlled and selective guest capture.

Conclusions:

• Surface-supported host-guest chemistry offers significant potential in various applications.
• STM is a powerful tool for understanding these complex molecular systems.
• Future directions include dynamic systems and functionalized pores for advanced applications.