Molecular Weight Control via Cross Metathesis in Photo‐Redox Mediated Ring‐Opening Metathesis Polymerization
| Autor: | Rachel L. Tritt, Victoria K. Kensy, Farihah M. Haque, Laura M. Murphy, Scott M. Grayson, Andrew J. Boydston, Daniel B. Knorr |
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| Rok vydání: | 2020 |
| Předmět: |
010405 organic chemistry
Chemistry Chain transfer General Chemistry ROMP Vinyl ether 010402 general chemistry Metathesis 01 natural sciences Combinatorial chemistry Catalysis 0104 chemical sciences chemistry.chemical_compound Polymerization Copolymer medicine Ring-opening metathesis polymerisation medicine.drug Norbornene |
| Zdroj: | Angewandte Chemie International Edition. 59:9074-9079 |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.202000434 |
| Popis: | Photo-redox mediated ring-opening metathesis polymerization (photo-ROMP) is an emerging ROMP technique that uses an organic redox mediator and a vinyl ether initiator, in contrast to metal-based initiators traditionally used in ROMP. The reversibility of the redox-mediated initiation and propagation steps enable spatiotemporal control over the polymerization. Herein, we explore a simple, inexpensive means of controlling molecular weight, using alpha olefins as chain transfer agents. This method enables access to low molecular weight oligomers, and molecular weights between 1 and 30 kDa can be targeted simply by altering the stoichiometry of the reaction. This method of molecular weight control was then used to synthesize a functionalized norbornene copolymer in a range of molecular weights for specific materials applications. |
| Databáze: | OpenAIRE |
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