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. 2021 Jan 20;12:478. doi: 10.1038/s41467-020-20640-z

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — a–d Molecular structure of ZnTtBAzP (a), ZnTtBPC (b), ZnOBOPC (c) and ZnTtBNPC (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 O-RQP catalysed by ZnTtBAzP (e), ZnTtBPC (f), ZnOBOPC (g) and ZnTtBNPC (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 O-RQP catalysed by ZnTtBAzP (i), ZnTtBPC (j), ZnOBOPC (k) and ZnTtBNPC (l), respectively. Associated molecular weight distributions were provided as Supplementary Figs. 11–15. 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.