Rigid Polymer Network-Based Autonomous Photoswitches Working in the Solid State Encoded by Room-Temperature...

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Polymer Science

Background:

• Autonomous molecular switches with self-recoverability are crucial for energy-efficient applications.
• Solid-state operation of molecular switches is challenging due to high energy barriers.

Purpose of the Study:

• To develop a prototype autonomous photoswitch capable of operating in the solid state.
• To overcome the limitations of solid-state molecular switching through a polymer network approach.

Main Methods:

• Utilized a hexacarboxylic sodium-modified hexathiobenzene as the photoexcitation-driven unit.
• Employed a rigid polymer, poly(dimethyldiallylammonium)chloride (PDDA), to complex with the photoactive unit via electrostatic coupling.
• Investigated photoexcitation-controlled molecular aggregation and self-recovery within the solid polymer matrix.

Main Results:

• Demonstrated successful photoexcitation-controlled molecular aggregation and self-recovery in a solid PDDA matrix.
• Achieved autonomous switching behavior in the solid state under rhythmic photoirradiation.
• Encoded the switching process using self-recoverable room-temperature phosphorescence.

Conclusions:

• The developed prototype successfully enables autonomous photoswitching in the solid state.
• The rigid polymer network facilitates molecular aggregation and self-recovery, overcoming previous limitations.
• This work presents a promising platform for advanced solid-state molecular devices.