to a previously reported literature procedure.22 (link),34 (link),35 (link) Anhydrous N,N-dimethylformamide (DMF; 99.8%), poly(4-vinylpyridine) (P4VP; Mw = 60,000 g mol–1), iodomethane
(MeI; 99.0%), deuterated solvents, the RAFT agent 4-cyano-4-(thiobenzoylthio)pentanoic
acid (CTBPA), and sodium chloride (NaCl) were acquired from Sigma-Aldrich.
Oligo(ethylene glycol) methyl ether methacrylate (OEGMA; Mn = 300 g mol–1) was obtained from Sigma-Aldrich
and passed through a short activated basic alumina column prior to
polymerization. Sodium iodide (NaI) (99.5%, anhydrous) was obtained
from Acros-Organics. Azobisisobutyronitrile (AIBN) was obtained from
Sigma-Aldrich and recrystallized twice from methanol. All other analytical
grade solvents were obtained from Boom. Water was of R.O. quality
(10 μS cm–1, equivalent to 10–4 M NaCl).