title: Zinc versus Magnesium: Orthogonal Catalyst Reactivity in Selective Polymerizations of Epoxides, Bio-derived Anhydrides and Carbon Dioxide.
abstract: Developing selective polymerizations from complex monomer mixtures is an important challenge. Here, dinuclear catalysts allow selective polymerization from mixtures of sterically hindered tricyclic anhydrides, carbon dioxide and epoxides to yield well-controlled copoly(ester-carbonates). Surprisingly, two very similar homogeneous catalysts differing only in the central metal, zinc versus magnesium, show very high but diametrically opposite monomer selectivity. The selectivity is attributed to different polymerization kinetics and to steric factors associated with the anhydrides.
authors.affiliation: Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Prabhjot K
authors.initials: PK
authors.lastname: Saini
authors.affiliation: Department of Chemistry, University of Oxford, Chemical Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
authors.forename: Giulia
authors.identifier: http://orcid.org/0000-0003-1370-2952
authors.initials: G
authors.lastname: Fiorani
authors.affiliation: Department of Chemistry, The Pennsylvania State University, New Kensington, Pennsylvania, 15068, USA.
authors.forename: Robert T
authors.initials: RT
authors.lastname: Mathers
authors.affiliation: Department of Chemistry, University of Oxford, Chemical Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
authors.forename: Charlotte K
authors.identifier: http://orcid.org/0000-0002-0734-1575
authors.initials: CK
authors.lastname: Williams
keywords: carbon dioxide; epoxides; ring-opening polymerization; terpenes; tricyclic anhydrides