Photo ATRP has emerged as a powerful radical polymerization technique which, in contrast to other methods, allows for the in-situ deoxygenation of the reaction mixture in the absence of any additional reactants such as reducing agents. In this lecture I will discuss the effect of the various ATRP components on oxygen consumption. We found that the type of ligand, initiator, monomer and solvent significantly impact the rate at which the oxygen is being consumed and can subsequently affect both the kinetics of the polymerization and the dispersity of the resulting polymer. Importantly, we discovered that the inexpensive ligand TREN leads to the fastest oxygen consumption and polymerization time despite not participating in the reduction of CuBr2. The fast oxygen consumption may be attributed to a side reaction between the primary amine and the initiator which however does not significantly affect the control over the dispersity and the end-group fidelity of the obtained polymers.

Effect of photo-ATRP components on oxygen consumption

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.