| Autor: |
Yuan, Bolei, Huang, Tingting, Wang, Xinghuo, Ding, Yi, Jiang, Lin, Zhang, Yunhe, Tang, Jun |
| Předmět: |
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| Zdroj: |
Macromolecular Rapid Communications; Jan2022, Vol. 43 Issue 1, p1-12, 12p |
| Abstrakt: |
An enzyme cascade system including glucose oxidase (GOx) and iron porphyrin (DhHP‐6) is encapsulated in a metal–organic framework called zeolitic imidazolate framework‐8 (ZIF‐8) through one‐step facile synthesis. The composite (GOx&DhHP‐6@ZIF‐8) is then used to initiate oxygen‐tolerant reversible addition‐fragmentation chain‐transfer polymerization for different methacrylate monomers, such as 2‐diethylaminoethyl methacrylate, 2‐hydroxyethyl methacrylate, and poly(ethylene glycol) methyl ether methacrylate (Mn = 500 g mol−1). The composite shows the robustness toward solvent and temperatures, all polymerizations using above monomers and catalyzing by GOx&DhHP‐6@ZIF‐8 exhibits high monomer conversion (>85%) and narrow molar mass dispersity (<1.3). Besides, acrylic and acrylamide monomers such as 2‐hydroxyethyl acrylate and N,N‐dimethylacrylamide are also carried to demonstrate the broad applicability. Proton nuclear magnetic resonance characterization and chain extension experiments confirm the retaining end groups of the resultant polymers, which is a significant feature of living polymerization. More importantly, the process of recycling the composite through a centrifuge is simplistic, and the composite still maintains similar activity compared to the original composites after five times. This low‐cost and easily separated composite catalyst represents a versatile strategy to synthesize well‐defined functional polymers suitable for industrial‐scale production. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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