Perhaps the most attractive characteristic of photo-mediated controlled polymerizations is their capability for temporal control. However, in many reported systems a small, yet reproducible, percentage of conversion can be observed during the dark periods. This small percentage has been attributed to either error during sampling or inaccuracy of the NMR measurement. In this talk, the state of the art photo-mediated controlled polymerizations will be compared in order to identify their real behavior during the dark period. In situ NMR monitoring will be used as a simple and modular method to study the polymerization kinetics revealing the best “on-off” photo-polymerization systems and providing with invaluable information with respect to the mechanism of each approach (e.g. ATRP, PET-RAFT etc.)

Shedding a light on state of the art photo-mediated controlled polymerizations

255th National Meeting (2018)

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