Journal article
Ultrarapid cerium(III)–NHC catalysts for high molar mass cyclic polylactide
- Abstract:
- Cyclic 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
-
-
(Preview, Accepted manuscript, 473.8KB, Terms of use)
-
- Publisher copy:
- 10.1021/acscatal.0c04858
Authors
+ Engineering and Physical Sciences Research Council
More from this funder
- Grant:
- EP/S018603/1
- RC-CH1302
- Publisher:
- American Chemical Society
- Journal:
- ACS Catalysis More from this journal
- Volume:
- 11
- Issue:
- 2021
- Pages:
- 1563-1569
- Publication date:
- 2021-01-15
- Acceptance date:
- 2021-01-07
- DOI:
- EISSN:
-
2155-5435
- ISSN:
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2155-5435
- Language:
-
English
- Keywords:
- Pubs id:
-
1157334
- Local pid:
-
pubs:1157334
- Deposit date:
-
2021-01-19
Terms of use
- Copyright holder:
- American Chemical Society
- Copyright date:
- 2021
- Rights statement:
- © 2021 American Chemical Society
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from American Chemical Society at: https://doi.org/10.1021/acscatal.0c04858
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