期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202117533
关键词
CO2 Insertion; Chemoselectivity; Multi-Block Copolymer; Salen-Manganese Complex; Switchable Catalysis
资金
- National Key R&D Program of China [2021YFA1501700]
- National Natural Science Foundation of China, Basic Science Center Program [51988102]
- National Natural Science Foundation of China [52073272]
Switchable catalysis has been developed and applied in the one-pot selective copolymerization from complex mixtures, leading to the synthesis of multi-block copolymers with structural diversity and functionality.
The switchable catalysis using a commercial salenMn catalyst was firstly developed and applied in the one-pot selective copolymerization from anhydrides, epoxides, CO2 and epsilon-caprolactone (epsilon-CL) mixtures for the precise synthesis of AB, ABA and novel ABC block copolymers. The observed unique double switch process comprising three different polymerization cycles was rationalized by theoretical calculations. Surprisingly, the first block turned out to be an efficient macromolecular initiator for the consecutive introduction of carbonate linkages into copolymers, albeit with dominant cyclization with the catalyst alone. Further, through the selective reaction on different epoxides, the switchable copolymerization of up to five monomers was achieved yielding well-defined multi-block copolymers with structural diversity and functionality.
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