Conjugated Networked Poly(ionic liquid)-Accommodating Organic Cages: A Matter of Interhost Electron Communications

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Nanotechnology

Background:

• Designing complex hierarchical hosts for controlled inter-host electron communication is challenging.
• Existing materials often lack efficient mechanisms for modulating material properties through electron transfer.
• Artificial compartmentalized hosts are crucial for advanced material functionalities.

Purpose of the Study:

• To construct a supramolecular host-in-host assembly enabling inter-host electron communication.
• To investigate the impact of this architecture on material properties like conductivity and photothermal conversion.
• To explore the role of inter-host electron communication in catalytic applications.

Main Methods:

• Formation of a host-in-host assembly via electrostatic interactions between organic cages and poly(ionic liquid)s.
• Utilizing UV light to trigger inter-host electron transfer between cage and poly(ionic liquid) components.
• Incorporating palladium (Pd) clusters into the host cavities for catalytic studies.

Main Results:

• Achieved a hierarchical structure integrating discrete molecular hosts within an extended network.
• Demonstrated UV light-triggered electron transfer, leading to a ~500-fold increase in conductivity.
• Observed high near-infrared (NIR) photothermal conversion efficiency (~82.2%).
• Enhanced catalytic activity and selectivity in hydrogenation reactions due to modulated electronic structure and substrate transport.

Conclusions:

• The developed host-in-host assembly effectively facilitates inter-host electron communication.
• This electronic interplay significantly enhances material conductivity and photothermal properties.
• The architecture provides a platform for advanced catalysis by modulating the local electronic environment.