Authors (6): R. W. F. .Kerr, P. M. D. . A. .Ewing, S. K. Raman, A. D. Smith, C. K. Williams, P. L. Arnold
Themes: Design (2021)
DOI: 10.1021/acscatal.0c04858
Citations: 31
Pub type: article-journal
Publisher: American Chemical Society (ACS)
Issue: 3
License:
Publication date(s): 2021/02/05 (print) 2021/01/15 (online)
Pages: 1563-1569
Volume: 11 Issue: 3
Journal: ACS Catalysis
URL: http://dx.doi.org/10.1021/acscatal.0c04858Cyclic 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.
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CCDC 1986496: Experimental Crystal Structure Determination | Related Article: Ryan W. F. Kerr, Paul M. D. A. Ewing, Sumesh K. Raman, ... | 2021 |
cs0c04858_si_001.pdf | Supl. data for Ultrarapid Cerium(III)–NHC Catalysts for High Molar Mass ... | 2021 |
cs0c04858_si_002.txt | Supl. data for Ultrarapid Cerium(III)–NHC Catalysts for High Molar Mass ... | 2021 |