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Light-Responsive Terpolymers Based on Polymerizable Photoacids

Wendler, Felix; Schneider, Killian R.A.; Dietzek, Benjamin; Schacher, Felix H.
in: Polymer Chemistry (2017) 2959

We present the synthesis and characterization of amphiphilic terpolymers containing photoacids based on 1-naphthol using reversible addition fragmentation chain transfer radical polymerization (RAFT). The respective poly(methyl methacrylate-co-2-(N,N-dimethylamino)ethyl methacrylate-co-1-naphthol methacrylate/methacrylamide) P[MMAx-co-DMAEMAy-co-NMAz/NMAmz] terpolymers were prepared starting from 1-naphthol derived monomers tNMA and tNMAm via RAFT polymerization und subsequent deprotection of the hydroxyl groups. The resulting materials were characterized using size exclusion chromatography and UV/Vis absorption spectroscopy, the latter also enabling the determination of pka in the ground as well as the exited state (pka*) of the monomers (NMA and NMAm). Afterwards, nanoprecipitation led to the formation of nanoparticles in aqueous media, which exhibited photo-responsive behavior upon UV-irradiation.

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