A versatile route to polythiophenes with functional pendant groups using alkyne chemistry

Area of Science:

• Polymer Chemistry
• Organic Electronics
• Materials Science

Background:

• Polythiophenes are crucial in organic electronics.
• Developing versatile building blocks is key for new material synthesis.
• Functionalization of polythiophene backbones allows tuning of properties.

Purpose of the Study:

• To synthesize a new versatile polythiophene building block, 3-(3,4-ethylenedioxythiophene)prop-1-yne (pyEDOT).
• To demonstrate the utility of pyEDOT for creating functionalized polythiophene derivatives.
• To explore alkyne chemistry for polythiophene modification.

Main Methods:

• Synthesis of pyEDOT from glycidol in four steps.
• Utilizing Sonogashira coupling for pre-electropolymerization functionalization.
• Employing click chemistry for post-electropolymerization modifications.

Main Results:

• Successful synthesis of pyEDOT with 28% overall yield.
• Demonstrated versatility of pyEDOT through various functionalized derivatives.
• Facile functionalization via Sonogashira coupling and click chemistry.

Conclusions:

• pyEDOT is a versatile building block for polythiophene synthesis.
• Alkyne chemistry provides efficient routes for pyEDOT functionalization.
• This approach facilitates the development of novel polythiophene-based materials.