title: Phosphasalen Indium Complexes Showing High Rates and Isoselectivities in rac-Lactide Polymerizations.
abstract: Polylactide (PLA) is the leading bioderived polymer produced commercially by the metal-catalyzed ring-opening polymerization of lactide. Control over tacticity to produce stereoblock PLA, from rac-lactide improves thermal properties but is an outstanding challenge. Here, phosphasalen indium catalysts feature high rates (30±3 m-1min-1, THF, 298 K), high control, low loadings (0.2 mol %), and isoselectivity (Pi=0.92, THF, 258 K). Furthermore, the phosphasalen indium catalysts do not require any chiral additives.
authors.affiliation: Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Dominic
authors.initials: D
authors.lastname: Myers
authors.affiliation: Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Andrew J P
authors.identifier: 0000-0001-6175-1607
authors.initials: AJP
authors.lastname: White
authors.affiliation: School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.
authors.forename: Craig M
authors.initials: CM
authors.lastname: Forsyth
authors.affiliation: CSIRO Manufacturing, Bayview Avenue, Clayton, VIC, 3168, Australia.
authors.forename: Mark
authors.initials: M
authors.lastname: Bown
authors.affiliation: Department of Chemistry, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK.
authors.forename: Charlotte K
authors.identifier: 0000-0002-0734-1575
authors.initials: CK
authors.lastname: Williams
keywords: indium; isoselectivity; polymerization; structure elucidation; synthetic methods