(25) J. Am. Chem. Soc. 2012, 134(30), 12758–12773
“Mechanism of Living Lactide Polymerization by Dinuclear Indium Catalysts and Its Impact on Isoselectivity”
A family of racemic and enantiopure indium complexes 1−11 bearing bulky chiral diaminoaryloxy ligands, H(NNOR), were synthesized and fully characterized. Investigation of both the mono- and the…
Read more…
(24) Chem. Commun. 2012, 48(54), 6806-6808
“Highly controlled immortal polymerization of β-butyrolactone by a dinuclear indium catalyst”
An ethoxy-bridged dinuclear indium catalyst was used for the ring opening polymerization of the cyclic ester β-butyrolactone to form the biodegradable polyester poly(hydroxybutyrate) (PHB). The catalyst…
Read more…
(23) Polymer 2012, 53(12), 2443-2452
“Thermorheological and mechanical behavior of polylactide and its enantiomeric diblock copolymers and blends”
In this study, different compositions of nearly monodispersed diblock copolymers of DL-lactide or D-lactide and L-lactide were synthesized by living ring-opening polymerization with a…
Read more…
(22) Dalton Trans. 2012, 41(26), 8123-8134.
“Effects of ligand tuning on dinuclear indium catalysts for lactide polymerization”
Invited article in special “New Talent: The Americas” issue.
Functionalized diaminophenols, H(NR1R2NR3O), were investigated as ligands for indium catalysts in the ring-opening polymerization of racemic lactide….
Read more…
(21) Rheol. Acta 2012, 51(4), 357-369
“Wall slip and melt fracture of poly(lactides)”
The wall slip and melt fracture behaviour of several commercial polylactides (PLAs) as well as their rheological properties under shear and extensional have been investigated. The PLAs have had weight-average molecular weights in the range of 104–105…
Read more…
(20) J. Am. Chem. Soc. 2011, 133(24), 9278–9281
“Redox Control of a Ring-Opening Polymerization Catalyst”
The activity of an yttrium alkoxide complex supported by a ferrocene-based ligand was controlled using redox reagents during the ring-opening polymerization of l-lactide. The oxidized complex was characterized by X-ray crystallography and 1H…
Read more…
(19) J. Rheol. 2011, 55(5), 987-1004
“Solution and melt viscoelastic properties of controlled microstructure poly(lactide)”
A series of controlled microstructure poly(lactide) (PLA) samples were synthesized using a novel chiral dinuclear indium catalyst capable of living polymerization of lactide. PLAs with different ratios of L- to D-…
Read more…
(18) Organometallics 2010, 29(22), 6065–6076
“Phosphine-Tethered Carbene Ligands: Template Synthesis and Reactivity of Cyclic and Acyclic Functionalized Carbenes”
Reaction of the phosphine-tethered isocyanide iron(II) complex 1, [CpFe(CO)(PCN)]I, with primary and secondary amines forms the corresponding acyclic (diamino)carbene complexes…
Read more…
(17) Inorg. Chem. 2010, 49(12), 5444–5452
“Synthesis and Structural Studies of Chiral Indium(III) Complexes Supported by Tridentate Diaminophenol Ligands”
Indium(III) dimethyl, dihalide, and alkoxy-bridged complexes bearing a chiral diaminophenoxy tridentate ligand [NNHO]− were synthesized. The dimethyl complex (NNHO)InMe2 (1) was unreactive…
Read more…
(16) Dalton Trans. 2010, 39(2), 541–547
“Electron Rich Bidentate Phosphinimine-Imine Ligands: Synthesis and Reactivity of Late Transition Metal Complexes”
Invited article in special “New Talent” issue.
Electron rich phosphinimine-imine proligands Ph3PN(C6H4)C(Ph)(NAr) (LAr) (Ar = 4-(OEt)C6H4 (OEt), 3,5-Me2C6H3(Xyl)) were synthesized in…
Read more…
(15) J. Supercrit. Fluids 2010, 51(3), 376-383
“Influence of polydispersity of poly(lactic acid) on particle formation by rapid expansion of supercritical CO2 solutions”
Poly(lactic acid) (PLA) particles were generated by rapid expansion of supercritical PLA/CO2 solutions (RESS). Two different PLA samples, one with high (PDI = 2.4)…
Read more…
(14) Organometallics 2009, 28(21), 6370–6373
“Template Synthesis of Donor-Functionalized NX-Carbenes (X = P, Si)”
Donor-functionalized (phosphino)(amino)- and (silyl)(amino)carbenes are generated via nucleophilic attack at the carbon atom…
Read more…
(13) Organometallics 2009, 28(13), 3889–3895
“Reversible Orthopalladation of Phosphinimine−Imine Dichloropalladium(II) Complexes”
The synthesis and characterization of triphenylphosphinimine−arylimine bidentate ligands (aryl = 2,4,6-trimethylphenyl or 4-methylphenyl) along with their…
Read more…
(12) Organometallics, 2009, 28(5), 1309-1319
“Unusually Stable Chiral Ethyl Zinc Complexes: Reactivity and Polymerization of Lactide”
Chiral diaminophenoxy proligands, H(NNR′OR), where R = t-Bu, H and R′ = Me, H, have been developed and their respective zinc ethyl complexes…
Read more…
(11) Angew. Chem. Int. Ed. 2008, 47(12), 2290-2293
“A Highly Active Chiral Indium Catalyst for Living Lactide Polymerization”
It loves LA! A unique chiral dinuclear indium complex 1 (see structure; In gray, Cl green, O red, N blue, C black) has been developed…
Read more…