Conjugated Polymers à la Carte from Time-Controlled Direct (Hetero)Arylation Polymerization

Area of Science:

• Polymer Chemistry
• Materials Science
• Organic Electronics

Background:

• Direct (hetero)arylation polymerization (DHAP) is a promising method for synthesizing conjugated polymers due to its simplicity, cost-effectiveness, and environmental benefits.
• However, DHAP often suffers from a lack of selectivity when multiple aromatic C-H bonds are present, limiting the precise control over polymer structure.

Purpose of the Study:

• To investigate the potential of time-controlled direct (hetero)arylation polymerization (DHAP) for producing well-defined and processable semiconducting polymers.
• To demonstrate the versatility of this controlled DHAP approach using various aromatic monomers.
• To compare the properties of polymers synthesized via controlled DHAP with those obtained through traditional Stille and Suzuki coupling methods.

Main Methods:

• Implementation of time-controlled reaction conditions for direct (hetero)arylation polymerization.
• Polymerization of diverse aromatic monomers including 2,7-dibromofluorene, 2,7-dibromocarbazole, 1,4-dibromobenzene, bithiophene, dithienyl-benzothiadiazole, and diketopyrrolopyrrole derivatives.
• Characterization of the resulting polymers' structural integrity, processability, and electronic properties.

Main Results:

• Well-defined and processable semiconducting polymers were successfully synthesized using time-controlled DHAP.
• A range of aromatic compounds were efficiently polymerized, demonstrating the broad applicability of the method.
• The synthesized polymers exhibited properties comparable or superior to those produced via Stille and Suzuki polymerization.

Conclusions:

• Time-controlled DHAP enables the selective synthesis of high-quality conjugated polymers.
• This approach provides a viable and cost-effective route for the production of advanced semiconducting polymers.
• The findings pave the way for the low-cost manufacturing of conjugated polymers essential for the advancement of plastic electronics.