期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 17, 页码 5251-5254出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201511793
关键词
block copolymers; iron; redox chemistry; redox-switch; ring-opening polymerization
资金
- NSF-CAREER [1454807]
- NSF-GRF
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1454807] Funding Source: National Science Foundation
A cationic iron(III) complex was active for the polymerization of various epoxides, whereas the analogous neutral iron(II) complex was inactive. Cyclohexene oxide polymerization could be switched off upon in situ reduction of the iron(III) catalyst and switched on upon in situ oxidation, which is orthogonal to what was observed previously for lactide polymerization. Conducting copolymerization reactions in the presence of both monomers resulted in block copolymers whose identity can be controlled by the oxidation state of the catalyst: selective lactide polymerization was observed in the iron(II) oxidation state and selective epoxide polymerization was observed in the iron(III) oxidation state. Evidence for the formation of block copolymers was obtained from solubility differences, GPC, and DOSY-NMR studies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据