Issue 11, 2017

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
25 4 2017
Accepted
21 9 2017
First published
22 9 2017

Inorg. Chem. Front., 2017,4, 1798-1805

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, 4, 1798 DOI: 10.1039/C7QI00227K

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