期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 8, 页码 3209-3217出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201910828
关键词
microreactors; monomers; organocatalysis; photochemistry; polymerization
资金
- Colorado State University
- NIH [R35GM119702]
- National Science Foundation [ACI-1548562]
- National Institutes of Health F32 Postdoctoral Fellowship [F32GM122392]
Development of photocatalysts (PCs) with diverse properties has been essential in the advancement of organocatalyzed atom transfer radical polymerization (O-ATRP). Dimethyl dihydroacridines are presented here as a new family of organic PCs, for the first time enabling controlled polymerization of challenging acrylate monomers by O-ATRP. Structure-property relationships for seven PCs are established, demonstrating tunable photochemical and electrochemical properties, and accessing a strongly oxidizing (PC.+)-P-2 intermediate for efficient deactivation. In O-ATRP, the combination of PC, implementation of continuous-flow reactors, and promotion of deactivation through addition of LiBr are critical to producing well-defined acrylate polymers with dispersities as low as 1.12. The utility of this approach is established through demonstration of the oxygen-tolerance of the system and application to diverse acrylate monomers, including the synthesis of well-defined di- and triblock copolymers.
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