Fig. 2. (A) Demonstration of temporal control of ZnPcS₄⁻ mediated photo-RAFT polymerization regulated by NIR light (λ_max = 730 nm; I = 60 mW cm⁻²) with a reaction stoichiometry of [DMA] : [CTCPA] : [TEOA] : [ZnPcS₄⁻] = 200 : 1 : 4 : 0.01 at [DMA] : [water] = 50/50 (v/v). (B) Evolution of M_n and Đ versus monomer conversion from the same reaction in (A). (C) Evolution of the normalized MWDs versus reaction time using the reaction condition in (A). (D) Normalized MWDs of PDMA and its chain extension with DMA using a reaction stoichiometry of [DMA] : [PDMA macroRAFT agent] : [TEOA] : [ZnPcS₄⁻] = 400 : 1 : 8 : 0.02 at [DMA] : [water] = 50/50 (v/v).