KES1-0373
Reversible Deactivation Radical and Ionic Polymerization Using C-C and C-H Bonds as Dormant Species
Topic
S1. Polymer Synthesis
When and Where
Sep 30, 2026
15:40 - 16:05
Room 101
Session Chairs
Youn Soo KIM
Presenter(s)
Masami Kamigaito (Nagoya University)
Co-Author(s)
Abstract
Dormant species are indispensable for precision polymer synthesis. Various covalent bonds have been employed as dormant species, which are reversibly activated by appropriately selected stimuli to generate active species.1–3 The active species undergo propagation via reactions with monomers to induce chain growth, but should be deactivated as fast as possible to enable precision control of the molecular weights of the resulting polymers. Therefore, while dormant species should be readily activated, propagating species should rapidly reform dormant species. Most of the covalent bonds used as dormant species to control radical and ionic polymerization of vinyl monomers consist of heteroatoms such as halogens, oxygen, sulfur, and metals. However, these heteroatoms often cause issues in the products or residues. One of the ultimate dormant species could be those composed of carbon and hydrogen. However, C–H and C–C bonds are generally stable, making it difficult to generate active species under mild conditions. Furthermore, deactivation of the active species into the C–H and C–C bonds is also challenging. This presentation will discuss synergistic advances in deactivation radical and ionic polymerizations, including the utilization of C–H and C–C bonds for sustainable precision polymerization.4–6
[1] Jafari, V. F.; Grace, J. L.; Li, J.; Tanaka, J.; Jones, G. R.; Anastasaki, A.; You, W.; Zhu, J.; Kamigaito, M.; Boyer, C.; Qiao, G. G.; Adv. Sci. 2026, 13, e20657.
[2] Kamigaito, M.; Satoh, K.; Uchiyama, M. J. Polym. Sci., Part A, Polym. Chem. 2019, 57, 243.
[3] Uchiyama, M.; Satoh, K.; Kamigaito, M. Prog. Polym. Sci. 2022, 124, 101485.
[4] Amano, M.; Uchiyama, M.; Satoh, K.; Kamigaito, M. Angew. Chem. Int. Ed. 2022, 61, e202212633.
[5] Tanimoto, T.; Uchiyama, M.; Kamigaito, M. Angew. Chem. Int. Ed. 2023, 62, e202307791.
[6] Uchiyama, M.; Ohira, N.; Yamashita, K.; Sagawa, K.; Kamigaito, M.; Nat. Chem. 2024, 16, 1630.
[1] Jafari, V. F.; Grace, J. L.; Li, J.; Tanaka, J.; Jones, G. R.; Anastasaki, A.; You, W.; Zhu, J.; Kamigaito, M.; Boyer, C.; Qiao, G. G.; Adv. Sci. 2026, 13, e20657.
[2] Kamigaito, M.; Satoh, K.; Uchiyama, M. J. Polym. Sci., Part A, Polym. Chem. 2019, 57, 243.
[3] Uchiyama, M.; Satoh, K.; Kamigaito, M. Prog. Polym. Sci. 2022, 124, 101485.
[4] Amano, M.; Uchiyama, M.; Satoh, K.; Kamigaito, M. Angew. Chem. Int. Ed. 2022, 61, e202212633.
[5] Tanimoto, T.; Uchiyama, M.; Kamigaito, M. Angew. Chem. Int. Ed. 2023, 62, e202307791.
[6] Uchiyama, M.; Ohira, N.; Yamashita, K.; Sagawa, K.; Kamigaito, M.; Nat. Chem. 2024, 16, 1630.
