ArticleAngewandte Chemie (International ed. in English)2020
Remote Perfluoroalkyl Substituents are Key to Living Aqueous Ethylene Polymerization.
Article in Angewandte Chemie (International ed. in English), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
7 citing papers in PubMed, 51 citations in OpenAlex.
- Unsymmetrical Fluorinated α‑Diimine Nickel Catalysts with Synergistic Steric and Fluorine Effects: toward Ethylene-Based Elastomers and Polar Copolymers.Polymer science & technology (Washington, D.C.) · 2026Article
- Unexpected Formation of Neutral Alkyl-Ni(II) Complexes Bearing UnsymmetricalInorganic chemistry · 2025Article
- Catalyst Editing via Post-Synthetic Functionalization by Phosphonium Generation and Anion Exchange for Nickel-Catalyzed Ethylene/Acrylate Copolymerization.Journal of the American Chemical Society · 2024Article
- Recent Advancements in the Synthesis of Ultra-High Molecular Weight Polyethylene via Late Transition Metal Catalysts.Polymers · 2024Review
- Efficient Suppression of Chain Transfer and Branching via CAngewandte Chemie (International ed. in English) · 2021Article
- Flexible polyfluorinated bis-diazirines as molecular adhesives.Chemical science · 2021Article
- Remote Perfluoroalkyl Substituents are Key to Living Aqueous Ethylene Polymerization.Angewandte Chemie (International ed. in English) · 2020Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In various nickel(II) salicylaldiminato ethylene polymerization catalysts, which are a versatile mechanistic probe for substituent effects, longer perfluoroalkyl groups exert a strong effect on catalytic activities and polymer microstructures compared to the trifluoromethyl group. This effect is accounted for by a reduced electron density on the active sites, and is also supported by electrochemical studies. Thus, β-hydride elimination, the key step of chain transfer and branching pathways, is disfavored while chain-growth rates are enhanced. This enhancement occurs to an extent that enables living polymerizations in aqueous systems to afford ultra-high-molecular-weight polyethylene for various chelating salicylaldimine motifs. These findings are mechanistically instructive as well as practically useful for illustrating the potential of perfluoroalkyl groups in catalyst design.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.