Fig. 2. Kinetic studies of PCs via different quenching pathways.

a–d Molecular structures of ZnOEP (a), ZnTPP (b), TPP (c) and ZnTSP (d). e–h Plot of ln([M]₀/[M]_t) versus time revealing k_p^app and temporal control for model PET-RAFT polymerisation via OQP (green), RQP (blue) and O-RQP (red) catalysed by ZnOEP (e), ZnTPP (f), TPP (g) and ZnTSP (h) respectively. i–l M_n (solid square) and M_w/M_n (hollow circle) versus monomer conversion analysed by gel permeation chromatography from aliquots taken at different time intervals during model PET-RAFT polymerisation via OQP (green), RQP (blue) and O-RQP (red) catalysed by ZnOEP (i), ZnTPP (j), TPP (k) and ZnTSP (l), respectively. The associated molecular weight distributions are provided in Supplementary Figs. 2–10. k_p^app apparent propagation rate of polymerisation, the number of which is denoted aside the corresponding polymerisation slope with the same colour. Average molecular weights M_n were denoted aside the corresponding points in i–l with the same colours.