Fig. 4. (A) Scheme of ZnPcS₄⁻ mediated dispersion photopolymerization of HPMA under 730 nm light irradiation (I = 60 mW cm⁻²) in the presence of TEOA and oxygen. (B) Kinetics of polymerization of HPMA catalyzed by ZnPcS₄⁻ under NIR light irradiation using [HPMA] : [PEG₁₁₃-CDTPA] : [TEOA] : [ZnPcS₄⁻] = 350 : 1 : 4 : 0.02 at a total solids content of 20 wt% (note red arrows indicate the aliquots taken for TEM measurement). (C) Evolution of M_n and Đ versus monomer conversion obtained from the same reaction in (B). (D) Evolution of normalized MWDs versus irradiation time from the same reaction in (B). (E–G) TEM images of polymeric nanoparticles obtained at different time points (t = 5, 6, and 7 hours).