Glaser-Hay-Coupled Random Copolymers Containing Boron Difluoride Formazanate Dyes

Area of Science:

• Materials Science
• Polymer Chemistry
• Organic Electronics

Background:

• Pi-conjugated polymers with acetylenic units offer narrow optical band gaps and tunable frontier orbital energies for organic electronics.
• Understanding structure-property relationships is crucial for designing advanced polymer materials.

Purpose of the Study:

• To synthesize and characterize novel acetylenic polymers and model compounds.
• To investigate the impact of specific monomer units (BF2 formazanate, fluorene, bis(alkoxy)benzene) on material properties.
• To explore post-polymerization functionalization for property tuning.

Main Methods:

• Glaser-Hay coupling for synthesis of model compounds and random copolymers.
• Electrochemical characterization to study redox activity.
• UV-vis spectroscopy to analyze absorption profiles.
• Reaction with dicobalt octacarbonyl ([Co2(CO)8]) for post-polymerization functionalization.

Main Results:

• Synthesized polymers and model compounds exhibit redox activity associated with BF2 formazanate, fluorene, and bis(alkoxy)benzene units.
• Copolymers display broad UV-vis absorption profiles, characteristic of their constituent monomers.
• Post-polymerization modification with cobalt carbonyl clusters reduced pi-conjugation, leading to blue-shifted absorption spectra.

Conclusions:

• The synthesized acetylenic polymers possess tunable electronic and optical properties.
• Post-polymerization functionalization offers a viable strategy to modify polymer characteristics.
• These materials are promising candidates for photovoltaics and other light-harvesting technologies.