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Issue 11, 2017
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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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Supplementary files

Article information


Submitted
25 Apr 2017
Accepted
21 Sep 2017
First published
22 Sep 2017

Inorg. Chem. Front., 2017,4, 1798-1805
Article type
Research Article

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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