Citation: Xiang Li, Beibei Zhang, Zhixiang Wang, Xiangyu Chen. Organocatalyzed iodine-mediated reversible-deactivation radical polymerization via photoinduced charge transfer complex catalysis[J]. Chinese Chemical Letters, ;2025, 36(6): 110383. doi: 10.1016/j.cclet.2024.110383 shu

Organocatalyzed iodine-mediated reversible-deactivation radical polymerization via photoinduced charge transfer complex catalysis

Xiang Li ^{a, 1} ,
Beibei Zhang ^{a, 1} ,
Zhixiang Wang ^{a, b, *,} ,
Xiangyu Chen ^{a, b, *,}

a.
School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
b.
Beijing National Laboratory for Molecular Sciences, Beijing 100190, China

zxwang@ucas.ac.cn

chenxiangyu20@ucas.ac.cn

Received Date: 15 June 2024
Revised Date: 19 August 2024
Accepted Date: 29 August 2024
Available Online: 31 August 2024

Figures(6)

Photoredox-mediated reversible-deactivation radical polymerization (RDRP) is an effective approach to synthesize polymers with defined composition and architecture. Current photoinduced RDRP primarily depends on outer-sphere electron transfer or homolysis mechanisms. Herein, we describe an example of iodine-mediated RDRP facilitated by photoinduced charge transfer complex (CTC) catalysis. The approach uses cheap and easily accessible N-heterocyclic nitrenium salt (NHN⁺···I^-) as the photoactive CTC. Upon the irradiation of visible light, NHN⁺···I^- undergoes single electron transfer to generate NHN^• and I^• radicals. The NHN^• radical activates dormant P_n-I polymers via inner-sphere single electron transfer, leading to the propagating P_n^• radical for chain growth and the I^- anion for recovering the CTC, and the I^• radical deactivates the polymerization via coupling with P_n^•.
- N-Heterocyclic nitrenium salt,
- RDRP,
- Charge transfer complex,
- Visible light,
- Polymerization
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