mz9b00855_si_001.pdf (2.22 MB)
Effect of Polymerization Components on Oxygen-Tolerant Photo-ATRP
journal contribution
posted on 2019-11-13, 16:41 authored by Manon Rolland, Richard Whitfield, Daniel Messmer, Kostas Parkatzidis, Nghia P. Truong, Athina AnastasakiPhoto-ATRP has recently emerged as a powerful technique
that allows
for oxygen-tolerant polymerizations and the preparation of polymers
with low dispersity and high end-group fidelity. However, the effect
of various photo-ATRP components on oxygen consumption and polymerization
remains elusive. Herein, we employ an in situ oxygen probe and UV–vis
spectroscopy to elucidate the effects of ligand, initiator, monomer,
and solvent on oxygen consumption. We found that the choice of photo-ATRP
components significantly impacts the rate at which the oxygen is consumed
and can subsequently affect both the polymerization time and the dispersity
of the resulting polymer. Importantly, we discovered that using the
inexpensive ligand TREN results in the fastest oxygen consumption
and shortest polymerization time, even though no appreciable reduction
of CuBr2 is observed. This work provides insight into oxygen
consumption in photo-ATRP and serves as a guideline to the judicious
selection of photo-ATRP components for the preparation of well-defined
polymers.