ABC and ABAB Block Copolymers by Electrochemically Controlled Ring-Opening Polymerization

ABC and ABAB Block Copolymers by Electrochemically Controlled Ring-Opening Polymerization

An electrochemically controlled synthesis of multiblock copolymers by alternating the redox states of (salfan)­Zr­(OtBu)2 (salfan = 1,1′-di­(2-tert-butyl-6-N-methylmethylene­phenoxy)­ferrocene) is reported. Aided by electrochemistry with a glassy carbon working electrode, an in situ potential switch...

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Veröffentlicht in:Journal of the American Chemical Society 2021-12, Vol.143 (47), p.19802-19808
Hauptverfasser: Hern, Zachary C, Quan, Stephanie M, Dai, Ruxi, Lai, Amy, Wang, Yihang, Liu, Chong, Diaconescu, Paula L
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container_end_page 19808
container_issue 47
container_start_page 19802
container_title Journal of the American Chemical Society
container_volume 143
creator Hern, Zachary C
Quan, Stephanie M
Dai, Ruxi
Lai, Amy
Wang, Yihang
Liu, Chong
Diaconescu, Paula L
description An electrochemically controlled synthesis of multiblock copolymers by alternating the redox states of (salfan)­Zr­(OtBu)2 (salfan = 1,1′-di­(2-tert-butyl-6-N-methylmethylene­phenoxy)­ferrocene) is reported. Aided by electrochemistry with a glassy carbon working electrode, an in situ potential switch alters the catalyst’s oxidation state and its subsequent monomer (l-lactide, β-butyrolactone, or cyclohexene oxide) selectivity in one pot. Various multiblock copolymers were prepared, including an ABAB tetrablock copolymer, poly­(cyclohexene oxide-b-lactide-b-cyclohexene oxide-b-lactide), and an ABC triblock copolymer, poly­(hydroxybutyrate-b-cyclohexene oxide-b-lactide). The polymers produced using this technique are similar to those produced via a chemical redox reagent method, displaying moderately narrow dispersities (1.1–1.5) and molecular weights ranging from 7 to 26 kDa.
doi_str_mv 10.1021/jacs.1c08648
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