RAFT polymerization and thiol chemistry: a complementary pairing for implementing modern macromolecular design

Area of Science:

• Polymer Chemistry
• Organic Synthesis

Background:

• Reversible addition fragmentation chain transfer (RAFT) polymerization is a key technique for synthesizing well-defined polymers.
• The RAFT agent end-group can be readily transformed into a thiol.
• Thiol groups enable diverse post-polymerization modification strategies.

Purpose of the Study:

• To review the functionalization of RAFT polymers via thiol modification.
• To highlight methods for introducing functional end-groups and bio-cleavable linkages.
• To emphasize the efficiency and versatility of thiol chemistry in RAFT polymer modification.

Main Methods:

• Utilizing thiol-ene chemistry for introducing functional end-groups.
• Employing disulfide exchange reactions to create bio-cleavable disulfide linkages.
• Post-polymerization modification of RAFT agent end-groups.

Main Results:

• Thiol modification provides a versatile platform for functionalizing RAFT polymers.
• Thiol-ene chemistry enables the straightforward introduction of various functionalities.
• Disulfide linkages offer a route to bio-cleavable polymer architectures.
• Thiol modification is demonstrated as an efficient and attractive strategy.

Conclusions:

• Thiol modification is a powerful and efficient approach for tailoring RAFT polymers.
• The ability to create both functional and cleavable linkages expands polymer design possibilities.
• RAFT polymerization coupled with thiol chemistry offers significant advantages in polymer synthesis and application.