Issue 10, 2019

Redox-switchable olefin cross metathesis (CM) reactions and acyclic diene metathesis (ADMET) polymerizations

Abstract

We show that redox-switchable catalysis may be used to control acyclic diene metathesis (ADMET) polymerizations and related reactions. A Ru(II) complex was found to display catalytic activities that were dependent on the oxidation state of a quinone-containing ligand. While the neutral form of the complex was found to catalyze ADMET polymerizations at rates that were commensurate with a commercially-available catalyst, significantly lower activities were observed when the complex was reduced. Using the rate differential, a series of ADMET polymerizations were modulated by alternately reducing and oxidizing the catalyst over time. A similar approach was also used to regulate the molecular weights of the polymers produced. Cross metathesis reactions and computational studies were performed in parallel to gain a deeper understanding of the underlying redox-switchable chemistry.

Graphical abstract: Redox-switchable olefin cross metathesis (CM) reactions and acyclic diene metathesis (ADMET) polymerizations

Supplementary files

Article information

Article type
Research Article
Submitted
15 ጁን 2019
Accepted
31 ጁላይ 2019
First published
12 ኦገስ 2019

Mater. Chem. Front., 2019,3, 2083-2089

Author version available

Redox-switchable olefin cross metathesis (CM) reactions and acyclic diene metathesis (ADMET) polymerizations

Y. Ryu, H. Shao, G. Ahumada, P. Liu and C. W. Bielawski, Mater. Chem. Front., 2019, 3, 2083 DOI: 10.1039/C9QM00391F

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