Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Tuning the thiolen: Al(III) and Fe(III) thiolen complexes for the isoselective ROP of rac-Lactide

Stewart, Jack A., McKeown, Paul, Driscoll, Oliver J., Mahon, Mary F., Ward, Benjamin D. and Jones, Matthew D. 2019. Tuning the thiolen: Al(III) and Fe(III) thiolen complexes for the isoselective ROP of rac-Lactide. Macromolecules 10.1021/acs.macromol.9b01205
Item availability restricted.

[img] PDF - Accepted Post-Print Version
Restricted to Repository staff only until 18 July 2020 due to copyright restrictions.

Download (916kB)

Abstract

A series of five iron and aluminum complexes bearing {ONSO} imine thiobis(phenolate) ligands have been prepared and applied to the ring-opening polymerization (ROP) of rac-lactide. Fe(1)Cl produced polylactide with a very strong isotactic bias (Pm = 0.79–0.89) and well-defined melting temperatures (Tm = 154–181 °C). The polymers have been characterized by a combination of 1H{1H} NMR, 13C{1H} NMR, gel permeation chromatography, thermogravimetric analysis, differential scanning calorimetry, and powder X-ray diffraction. Fe(1)Cl has also been shown to activate CO2, at atmospheric pressure and concentrations, to form a carbonato-bridged dimer. Fe(2–5)Cl and Al(1–5)Me were also active for lactide ROP demonstrating good-molecular-weight control (Đ = 1.04–1.12) and moderate isotactic preference (Pm = 0.56–0.72), with polymerization outcome correlating with ligand substituents.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Chemistry
Publisher: American Chemical Society
ISSN: 0024-9297
Funders: EPSRC
Date of First Compliant Deposit: 7 August 2019
Date of Acceptance: 18 July 2019
Last Modified: 08 Aug 2019 12:18
URI: http://orca.cf.ac.uk/id/eprint/124762

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics