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Synthesis of 6-membered cyclic carbonates from 1,3-diols and low CO2 pressure
Low pressure carbon dioxide is used as the carbonation agent in a
simple, safe and efficient procedure for the synthesis of 6-membered
cyclic carbonates from 1,3-diols. Using readily available reagents and
proceeding...
simple, safe and efficient procedure for the synthesis of 6-membered
cyclic carbonates from 1,3-diols. Using readily available reagents and
proceeding...
Polymers from sugar
Plastics are ubiquitous in modern society. However, the reliance on fossil fuels and the environmental persistence of most polymers make them unsustainable. Scientists are facing the challenge of developing cost-effective and...
A bimetallic iron(iii) catalyst for CO<sub>2</sub>/epoxide coupling
A novel di-iron(iii) catalyst for the copolymerisation of cyclohexene oxide and CO2 to yield poly(cyclohexene carbonate), under mild conditions, is reported. The catalyst selectivity was completely changed on addition of an...
Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide
In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring-opening polymerization of...
Xylose-Based Polyethers and Polyesters Via ADMET Polymerization toward Polyethylene-Like Materials
One of the challenges of developing bioderived polymers is to obtain materials with competitive properties. This study investigates the structure-properties relationships of polyesters and polyethers that can be derived from...
Catalysts for CO<sub>2</sub>/epoxide copolymerisation
The article reviews recent developments (mostly since 2004 until June 2010) in catalysts for CO2/epoxide copolymerisation and in the properties of the polycarbonates.
Bipyrrolidine salan alkoxide complexes of lanthanides
Four dimeric lanthanide alkoxide complexes bearing ONNO bipyrrolidine salan ligands (L MeH 2/L tBuH 2) have been prepared with Nd, Sm and Yb. Depending on the metal and...
Salan Group 13 complexes – structural study and lactide polymerisation
Herein the preparation and characterisation of a series of group 13 salan complexes, with a bipyrrolidine or N,N’-ethylenediamine backbone are disclosed. For the bipyrrolidine derived-salan ligand 1H2, the Al(III) and Ga(III)...
Polymers from Sugars and Cyclic Anhydrides
A d-xylose 3,5-anhydrosugar derivative has been used as an oxetane co-monomer in the ring-opening copolymerization (ROCOP) with cyclic anhydrides, to form a family of seven novel sugar-derived polyesters, with up to 100%...
Synthesis of 6-membered cyclic carbonates from 1,3-diols and low CO2 pressure
Low pressure carbon dioxide is used as the carbonation agent in a
simple, safe and efficient procedure for the synthesis of 6-membered
cyclic carbonates from 1,3-diols. Using readily available reagents and
proceeding...
simple, safe and efficient procedure for the synthesis of 6-membered
cyclic carbonates from 1,3-diols. Using readily available reagents and
proceeding...
Triblock copolymers from lactide and telechelic poly(cyclohexene carbonate)
The preparation of [small alpha],[small omega]-hydroxy-telechelic poly(cyclohexene carbonate) from a dizinc catalyst is reported. The telechelic polymer, with an yttrium initiator, can be used to polymerize lactide, yielding new...
A comparative study of oxygen diffusion in PET and PEF using molecular modelling
Bio-derived polyethylene furanoate (PEF) has recently gained attention as a sustainable alternative to polyethylene terephthalate (PET), amidst environmental concerns over fossil fuel depletion. Herein, we outline a...
Catalysts for CO<sub>2</sub>/epoxide copolymerisation
The article reviews recent developments (mostly since 2004 until June 2010) in catalysts for CO2/epoxide copolymerisation and in the properties of the polycarbonates.
Xylose-Based Polyethers and Polyesters Via ADMET Polymerization toward Polyethylene-Like Materials
One of the challenges of developing bioderived polymers is to obtain materials with competitive properties. This study investigates the structure-properties relationships of polyesters and polyethers that can be derived from...
Divergent Catalytic Strategies for the Cis/Trans Stereoselective Ring-Opening Polymerization of a Dual Cyclic Carbonate/Olefin Monomer
A dual seven-membered cyclic carbonate/olefin monomer was synthesized from CO2 and cis-1,4-butenediol and polymerized. The properties of the polymer were controlled using divergent catalytic strategies toward the stereochemistry...
Monomeric and dimeric Al(III) complexes for the production of polylactide
Sarah M. Kirk, Helena C. Quilter, Antoine Buchard, Lynne H. Thomas, Gabriele Kociok-Kohn, Matthew D. Jones
Sep 21, 2016
A series of monometallic and bimetallic Al(III) complexes with substituted naphthyl based Schiff base ligands have been prepared and characterised. When 1-aminonaphthalene based ligands were reacted with AlMe3 monometallic...
Salan Group 13 complexes – structural study and lactide polymerisation
Herein the preparation and characterisation of a series of group 13 salan complexes, with a bipyrrolidine or N,N’-ethylenediamine backbone are disclosed. For the bipyrrolidine derived-salan ligand 1H2, the Al(III) and Ga(III)...
Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide
In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring-opening polymerization of...
Chemoselective Lactonization of Renewable Succinic Acid with Heterogeneous Nanoparticle Catalysts
The production of chemicals from renewable resources, resulting in the establishment of biorefineries, represents a challenge of increasing importance. Here we show that succinic acid, a C4 compound increasingly being...
Iminophosphorane-based [P<sub>2</sub>N<sub>2</sub>] rhodium complexes
[Rh(P2N2)X] complexes (2-X, X = Cl, BF4) featuring a tetradentate iminophosphorane phosphine ligand were synthesised and characterised. X-Ray analysis provides evidence for a square planar geometry without coordination of the...
Epoxy-functionalised 4-vinylguaiacol for the synthesis of bio-based, degradable star polymers via a RAFT/ROCOP strategy
An epoxy derivative of a naturally occuring vinylphenolic compound, 4-vinylguaiacol (4VGEP), was used for the synthesis of a well-defined (Mw/Mn = 1.08–1.14), bio-based styrene-type polymer. Block copolymers of 4VGEP with...
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