Heterotrimetallic carbon dioxide copolymerization and switchable catalysts: sodium is the key to high activity and unusual selectivity
A challenge in polymer synthesis using CO2 is to precisely control CO2 placement in the backbone and chain end groups. Here, a new catalyst class delivers unusual selectivity and is self‐switched between different polymerization cycles to construct specific sequences and desirable chain‐end chemistr...
| Κύριοι συγγραφείς: | , |
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| Μορφή: | Journal article |
| Γλώσσα: | English |
| Έκδοση: |
Wiley
2021
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| _version_ | 1826257239379279872 |
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| author | Plajer, AJ Williams, CK |
| author_facet | Plajer, AJ Williams, CK |
| author_sort | Plajer, AJ |
| collection | OXFORD |
| description | A challenge in polymer synthesis using CO2 is to precisely control CO2 placement in the backbone and chain end groups. Here, a new catalyst class delivers unusual selectivity and is self‐switched between different polymerization cycles to construct specific sequences and desirable chain‐end chemistries. The best catalyst is a trinuclear dizinc(II)sodium(I) complex and it functions without additives or co‐catalysts. It shows excellent rates across different ring‐opening (co)polymerization catalytic cycles and allows precise control of CO2 incorporation within polyesters and polyethers, thereby allowing access to new polymer chemistries without requiring esoteric monomers, multi‐reactor processes or complex post‐polymerization procedures. The structures, kinetics and mechanisms of the catalysts are investigated, providing evidence for intermediate speciation and uncovering the factors governing structure and composition and thereby guiding future catalyst design.
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| first_indexed | 2024-03-06T18:15:00Z |
| format | Journal article |
| id | oxford-uuid:045044a3-a603-4320-92c2-bc7b8896fc42 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:15:00Z |
| publishDate | 2021 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:045044a3-a603-4320-92c2-bc7b8896fc422022-03-26T08:51:07ZHeterotrimetallic carbon dioxide copolymerization and switchable catalysts: sodium is the key to high activity and unusual selectivityJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:045044a3-a603-4320-92c2-bc7b8896fc42EnglishSymplectic ElementsWiley2021Plajer, AJWilliams, CKA challenge in polymer synthesis using CO2 is to precisely control CO2 placement in the backbone and chain end groups. Here, a new catalyst class delivers unusual selectivity and is self‐switched between different polymerization cycles to construct specific sequences and desirable chain‐end chemistries. The best catalyst is a trinuclear dizinc(II)sodium(I) complex and it functions without additives or co‐catalysts. It shows excellent rates across different ring‐opening (co)polymerization catalytic cycles and allows precise control of CO2 incorporation within polyesters and polyethers, thereby allowing access to new polymer chemistries without requiring esoteric monomers, multi‐reactor processes or complex post‐polymerization procedures. The structures, kinetics and mechanisms of the catalysts are investigated, providing evidence for intermediate speciation and uncovering the factors governing structure and composition and thereby guiding future catalyst design. |
| spellingShingle | Plajer, AJ Williams, CK Heterotrimetallic carbon dioxide copolymerization and switchable catalysts: sodium is the key to high activity and unusual selectivity |
| title | Heterotrimetallic carbon dioxide copolymerization and switchable catalysts: sodium is the key to high activity and unusual selectivity |
| title_full | Heterotrimetallic carbon dioxide copolymerization and switchable catalysts: sodium is the key to high activity and unusual selectivity |
| title_fullStr | Heterotrimetallic carbon dioxide copolymerization and switchable catalysts: sodium is the key to high activity and unusual selectivity |
| title_full_unstemmed | Heterotrimetallic carbon dioxide copolymerization and switchable catalysts: sodium is the key to high activity and unusual selectivity |
| title_short | Heterotrimetallic carbon dioxide copolymerization and switchable catalysts: sodium is the key to high activity and unusual selectivity |
| title_sort | heterotrimetallic carbon dioxide copolymerization and switchable catalysts sodium is the key to high activity and unusual selectivity |
| work_keys_str_mv | AT plajeraj heterotrimetalliccarbondioxidecopolymerizationandswitchablecatalystssodiumisthekeytohighactivityandunusualselectivity AT williamsck heterotrimetalliccarbondioxidecopolymerizationandswitchablecatalystssodiumisthekeytohighactivityandunusualselectivity |