Dizinc lactide polymerization catalysts: Hyperactivity by control of ligand conformation and metallic cooperativity
Understanding how to moderate and improve catalytic activity is critical to improving degradable polymer production. Here, di- and mono-zinc catalysts, coordinated by bis(imino)diphenylamido ligands, show remarkable activities and allow determination of the factors controlling performance. In most c...
| Egile Nagusiak: | , , , , , , |
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| Formatua: | Journal article |
| Argitaratua: |
Wiley
2016
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| _version_ | 1826285235673759744 |
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| author | Thevenon, A Romain, C Bennington, M White, A Davidson, H Brooker, S Williams, C |
| author_facet | Thevenon, A Romain, C Bennington, M White, A Davidson, H Brooker, S Williams, C |
| author_sort | Thevenon, A |
| collection | OXFORD |
| description | Understanding how to moderate and improve catalytic activity is critical to improving degradable polymer production. Here, di- and mono-zinc catalysts, coordinated by bis(imino)diphenylamido ligands, show remarkable activities and allow determination of the factors controlling performance. In most cases, the di-zinc catalysts significantly out-perform the mono-zinc analogues. Further, for the best di-zinc catalyst, the ligand conformation controls activity: the catalyst with ‘folded’ ligand conformations show TOF values up to 60,000 h-1 (0.1 mol% loading, 298 K, [LA] = 1 M), whilst that with a ‘planar’ conformation is much slower, under similar conditions (TOF = 30 h-1). Di-zinc catalysts also perform very well under immortal conditions, showing improved control, and are able to tolerate loadings as low as 0.002 mol% whilst conserving high activity (TOF = 12,500 h-1). |
| first_indexed | 2024-03-07T01:25:49Z |
| format | Journal article |
| id | oxford-uuid:91f0caba-0f36-4df2-87b4-1370d9c6cce2 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T01:25:49Z |
| publishDate | 2016 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:91f0caba-0f36-4df2-87b4-1370d9c6cce22022-03-26T23:22:04ZDizinc lactide polymerization catalysts: Hyperactivity by control of ligand conformation and metallic cooperativityJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:91f0caba-0f36-4df2-87b4-1370d9c6cce2Symplectic Elements at OxfordWiley2016Thevenon, ARomain, CBennington, MWhite, ADavidson, HBrooker, SWilliams, CUnderstanding how to moderate and improve catalytic activity is critical to improving degradable polymer production. Here, di- and mono-zinc catalysts, coordinated by bis(imino)diphenylamido ligands, show remarkable activities and allow determination of the factors controlling performance. In most cases, the di-zinc catalysts significantly out-perform the mono-zinc analogues. Further, for the best di-zinc catalyst, the ligand conformation controls activity: the catalyst with ‘folded’ ligand conformations show TOF values up to 60,000 h-1 (0.1 mol% loading, 298 K, [LA] = 1 M), whilst that with a ‘planar’ conformation is much slower, under similar conditions (TOF = 30 h-1). Di-zinc catalysts also perform very well under immortal conditions, showing improved control, and are able to tolerate loadings as low as 0.002 mol% whilst conserving high activity (TOF = 12,500 h-1). |
| spellingShingle | Thevenon, A Romain, C Bennington, M White, A Davidson, H Brooker, S Williams, C Dizinc lactide polymerization catalysts: Hyperactivity by control of ligand conformation and metallic cooperativity |
| title | Dizinc lactide polymerization catalysts: Hyperactivity by control of ligand conformation and metallic cooperativity |
| title_full | Dizinc lactide polymerization catalysts: Hyperactivity by control of ligand conformation and metallic cooperativity |
| title_fullStr | Dizinc lactide polymerization catalysts: Hyperactivity by control of ligand conformation and metallic cooperativity |
| title_full_unstemmed | Dizinc lactide polymerization catalysts: Hyperactivity by control of ligand conformation and metallic cooperativity |
| title_short | Dizinc lactide polymerization catalysts: Hyperactivity by control of ligand conformation and metallic cooperativity |
| title_sort | dizinc lactide polymerization catalysts hyperactivity by control of ligand conformation and metallic cooperativity |
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