Journal
ACS MACRO LETTERS
Volume 11, Issue 3, Pages 376-381Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.2c00080
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Funding
- National Science Foundation (NSF) [CHE 2000391, 2108901]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [2108901] Funding Source: National Science Foundation
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In this study, a dual photoredox catalytic system was developed for photoinduced ATRP under red-light irradiation, avoiding the problems associated with UV light activation of the catalyst. The system showed oxygen tolerance due to the consumption of oxygen in the photoredox reactions, resulting in well-controlled polymerizations without the need for deoxygenation processes.
Despite advances in photochemical atom transfer radical polymerization (photoATRP), these systems often rely on the use of UV light for the activation/generation of the copper-based catalytic species. To circumvent the problems associated with the UV light, we developed a dual photoredox catalytic system to mediate photoinduced ATRP under red-light irradiation. The catalytic system is comprised of a Cu catalyst to control the polymerization via ATRP equilibrium and a photocatalyst, such as zinc(II) tetraphenylporphine or zinc(II) phthalocyanine, to generate the activator Cu-1 species under red-light irradiation. In addition, this system showed oxygen tolerance due to the consumption of oxygen in the photoredox reactions, yielding well-controlled polymerizations without the need for deoxygenation processes.
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