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Investigation of redox switchable titanium and zirconium catalysts for the ring opening polymerization of cyclic esters and epoxides

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Abstract

The synthesis and characterization of (thiolfan*)Zr(OtBu)2 (thiolfan* = 1,1′-di(2,4-di-tert-butyl-6-thiophenoxide)ferrocene) is reported, as well as its activity toward the ring-opening polymerizations of L-lactide and ε-caprolactone. With the titanium analogue, (thiolfan*)Ti(OiPr)2, diblock copolymers (AB and BA) and a triblock copolymer (ABA) were synthesized in a one-pot, redox-controlled process. Changing the metal center from titanium to zirconium has a profound influence on the reactivity profile of the corresponding reduced and oxidized catalysts in the switchable ring opening polymerization of cyclic esters and ethers.

Graphical abstract: Investigation of redox switchable titanium and zirconium catalysts for the ring opening polymerization of cyclic esters and epoxides

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Publication details

The article was received on 25 Apr 2017, accepted on 21 Sep 2017 and first published on 22 Sep 2017


Article type: Research Article
DOI: 10.1039/C7QI00227K
Citation: Inorg. Chem. Front., 2017, Advance Article
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    Investigation of redox switchable titanium and zirconium catalysts for the ring opening polymerization of cyclic esters and epoxides

    M. Y. Lowe, S. Shu, S. M. Quan and P. L. Diaconescu, Inorg. Chem. Front., 2017, Advance Article , DOI: 10.1039/C7QI00227K

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