Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 138, Issue 22, Pages 7107-7113Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b03113
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Funding
- Center for Sustainable Polymers, an NSF Center for Chemical Innovation [CHE-1413862]
- NSF IGERT program
- NSF GRFP [DGE-1144153]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1413862] Funding Source: National Science Foundation
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Recent developments in polyester synthesis have established several systems based on zinc, chromium, cobalt, and aluminum catalysts for the ring-opening alternating copolymerization of epoxides with cyclic anhydrides. However, to date, regioselective processes for this copolymerization have remained relatively unexplored. Herein we report the development of a highly active, regioselective system for the copolymerization of a variety of terminal epoxides and cyclic anhydrides. Unexpectedly, electron withdrawing substituents on the salen framework resulted in a more redox stable Co(III) species and longer catalyst lifetime. Using enantiopure propylene oxide, we synthesized semicrystalline polyesters via the copolymerization of a range of epoxide/anhydride monomer pairs.
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