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dc.contributor.authorKerr, Ryan W. F.
dc.contributor.authorEwing, Paul
dc.contributor.authorRaman, Sumesh K.
dc.contributor.authorSmith, Andrew D.
dc.contributor.authorWilliams, Charlotte K.
dc.contributor.authorArnold, Polly L.
dc.identifier.citationKerr , R W F , Ewing , P , Raman , S K , Smith , A D , Williams , C K & Arnold , P L 2021 , ' Ultrarapid cerium(III)–NHC catalysts for high molar mass cyclic polylactide ' , ACS Catalysis , vol. 11 , pp. 1563-1569 .
dc.identifier.otherPURE: 272308476
dc.identifier.otherPURE UUID: 0a85d987-9d2a-44e9-9ee5-fc302ecca4fa
dc.identifier.otherORCID: /0000-0002-2104-7313/work/87403931
dc.identifier.otherScopus: 85099922967
dc.identifier.otherWOS: 000618540300044
dc.descriptionThe EPSRC are acknowledged for research funding through the Centre for Doctoral Training in Critical Resource Catalysis (CRITICAT, EP/ L016419/1, R. W. F. K., P. M. D. A. E.), EP/J018139/1, the UK Catalysis Hub (EP/K014714/1, P. L. A., C. K. W., S. K. R.), EP/M010554/1 (P. L. A.) and EP/S018603/1 (C. K. W.). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 740311, P.L.A.).en
dc.description.abstractCyclic polyesters could improve the properties of degradable plastics, but routes to them that provide a product with faster rates, higher molar mass, and greater selectivity for cyclic vs linear polymer are needed. Here, homogeneous Ce(III)–N-heterocyclic carbene (NHC) catalysts show outstanding activities (turn-over-frequency (TOF) > 864 000 h–1), excellent control, and selectivity for cyclic polylactide (PLA) topology (>95%), yielding high molar mass PLA (60 < Mn < 250 kg mol–1). They efficiently produce cyclic PLA from rac-lactide or l-lactide and aliphatic cyclic polyesters from ε-caprolactone or β-butyrolactone. The enhanced performances are only achievable from combining cooperative Lewis acidic cerium(III) and hemilabile N-heterocyclic carbene functionalities.
dc.relation.ispartofACS Catalysisen
dc.rightsCopyright © 2021 American Chemical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectQD Chemistryen
dc.titleUltrarapid cerium(III)–NHC catalysts for high molar mass cyclic polylactideen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.description.statusPeer revieweden

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