期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 20, 页码 5731-5734出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201801380
关键词
bimetallic catalysts; chain transfer; homogeneous catalyst; polyether; polymerization
资金
- NSF [CHE-1531632]
- Office of Naval Research [N00014-14-1-0551]
Bimetallic chromium catalysts are investigated for the enantioselective polymerization of propylene oxide. The catalyst is composed of two salen chromium species linked by an alkyl chain, the length of which significantly impacts the rate of polymerization. While the use of a chloride initiator on the catalyst resulted in bimodal molecular weight distributions, switching to a trifluoroacetate initiating group and adding a diol chain transfer agent afforded polymers of controllable molecular weight with low, unimodal dispersities.
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