Visible Light and Sunlight Photoinduced ATRP with ppm of Cu Catalyst
| Autor: | Kristin Schröder, Dominik Konkolewicz, Krzysztof Matyjaszewski, Stefan Bernhard, Johannes Buback |
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| Rok vydání: | 2022 |
| Předmět: |
Reversible-deactivation radical polymerization
Materials science Bromine Polymers and Plastics Organic Chemistry chemistry.chemical_element Photochemistry Copper Catalysis Inorganic Chemistry Metal chemistry Polymerization visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Copolymer Visible spectrum |
| Zdroj: | ACS macro letters. 1(10) |
| ISSN: | 2161-1653 |
| Popis: | Photochemically induced ATRP was performed with visible light and sunlight in the presence of parts per million (ppm) copper catalysts. Illumination of the reaction mixture yielded polymerization in case of 392 and 450 nm light but not for 631 nm light. Sunlight was also a viable source for the photoinduced ATRP. Control experiments suggest photoreduction of the CuII complex (ligand to metal charge transfer in the excited state), yielding a CuI complex, and a bromine radical that can initiate polymerization. No photoactivation of CuI complex was detected. This implies that the mechanism of ATRP in the presence of light is a hybrid of ICAR and ARGET ATRP. The method was also used to synthesize block copolymers and polymerizations in water. |
| Databáze: | OpenAIRE |
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