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Approaches for improving the sustainability of conjugated polymer synthesis using direct arylation polymerization (DArP)

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Abstract

Direct arylation polymerization (DArP) provides a more sustainable alternative to conventional methods for conjugated polymer synthesis, such as Stille–Migita or Suzuki–Miyura polymerizations. DArP proceeds through a C–H activation pathway, allowing for a reduction in the synthetic steps needed to access the monomer, since the installation of a transmetallating reagent, such as an organostannane or organoboron, is not required. However, compared to small-molecule synthesis, the prevalent conditions employed for DArP still require hazardous or unsustainably sourced reaction components, such as the solvent and transition-metal catalyst. This mini-review highlights recent work on the implementation of sustainable solvents, transition metal catalysts, and overall polymerization methods for DArP. The extension of small-molecule direct arylation conditions towards polymer synthesis is also discussed, along with the associated challenges, mechanistic considerations, and outlook for future work.

Graphical abstract: Approaches for improving the sustainability of conjugated polymer synthesis using direct arylation polymerization (DArP)

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Article information


Submitted
11 Oct 2019
Accepted
25 Nov 2019
First published
26 Nov 2019

Polym. Chem., 2020, Advance Article
Article type
Minireview

Approaches for improving the sustainability of conjugated polymer synthesis using direct arylation polymerization (DArP)

R. M. Pankow and B. C. Thompson, Polym. Chem., 2020, Advance Article , DOI: 10.1039/C9PY01534E

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