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(a) Digital image after illuminating a PAG-free Ac-Dex particle suspension (left) and a PAG-encapsulating Ac-Dex particle suspension (right) with a UV-lamp (345 nm, 4 W) for 20 min (image contains stir bar). (b) Photoacid generation scheme by exciting 2-(4′-methoxystyryl)-4,6-bis(trichloromethyl)-1,3,5-triazine (PAG). (c) Schematic illustration of photoacid triggered deprotection of Ac-Dex and subsequent degradation of particles by dissolution.
