Redox Control of Group 4 Metal Ring-Opening Polymerization Activity toward <scp>l</scp>-Lactide and ε-Caprolactone

Xinke Wang(University of California, Los Angeles), Arnaud Thevenon(University of California, Los Angeles), Jonathan L. Brosmer(University of California, Los Angeles), Insun Yu(University of British Columbia), Saeed I. Khan(University of California, Los Angeles), Parisa Mehrkhodavandi(University of British Columbia), Paula L. Diaconescu(University of California, Los Angeles)
Journal of the American Chemical Society
July 25, 2014
Cited by 254

Abstract

The activity of several group 4 metal alkoxide complexes supported by ferrocene-based ligands was controlled using redox reagents during the ring-opening polymerization of l-lactide and ε-caprolactone. Switching in situ between the oxidized and reduced forms of a metal complex resulted in a change in the corresponding rate of polymerization. Opposite behavior was observed for each monomer used. One-pot copolymerization of the two monomers to give block copolymers was also achieved.


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