Polymersomes
are bilayer vesicles that self-assemble from amphiphilic
diblock copolymers, and provide an attractive system for the delivery
of biological and nonbiological molecules due to their environmental
compatibility, mechanical stability, synthetic tunability, large aqueous
core, and hyperthick hydrophobic membrane. Herein, we report a nanoscale
photoresponsive polymersome system featuring a meso-to-meso ethyne-bridged bis[(porphinato)zinc] (PZn2) fluorophore hydrophobic membrane solute and dextran in the
aqueous core. Upon 488 nm irradiation in solution or in microinjected
zebrafish embryos, the polymersomes underwent deformation, as monitored
by a characteristic red-shifted PZn2 emission spectrum
and confirmed by cryo-TEM. The versatility of this system was demonstrated
through the encapsulation and photorelease of a fluorophore (FITC),
as well as two different metal ions, Zn2+ and Ca2+.