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Articles by Iris Elser
Meltblow Processing of Poly (Ethylene Furanoate)-Bio-Based Polyester Nonwovens
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Toward Sustainable Fiber‐Reinforced Polymer Composites
1 Introduction Fiber-reinforced polymer composites (FRPCs), consisting of a polymer matrix reinforced with fibers, find wide-spread application. The main industries using FRPCs are the transportation (28%), construction (20%), electronic/electrical (16%), and pipelines/tanks (15%) sectors (Figure 1).[1] Glass fibers (GFs), followed by natural fibers and carbon fibers (CFs) are the most common reinforcement materials, while thermoset matrices dominate over thermoplastic matrices (Figure 1).
Interconversion Rates and Reactivity of Syn- and Anti-rotamers of Neutral and Cationic Molybdenum and Tungsten Imido Alkylidene N-Heterocyclic Carbene Complexes
Laura Stöhr Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart D-70569, Germany , Christian Fajman Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart D-70569, Germany , Roman Schowner Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart D-70569, Germany , Iris Elser Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart D-70569, Germany , Andreas Fuchs...
Probing B-X to B-H conversions and applications in C-F bond activation catalysis
Probing B–X to B–H conversions and applications in C–F bond activation catalysis† Amir Yeganeh-Salman,‡a Iris Elser,‡a Karlee L. Bamford, a Daniel Ebanksa and Douglas W. Stephan *a Abstract Herein we exploit a catalytic amount of [Ph3C]+ to initiate B–X to B–H bond conversion with Et3SiH. This was applied to 6 haloboranes. However, 9-X-9-borabicyclo[3.3.1]nonane (B-X-9-BBN, X = F, Br) reacts directly with silane.
9-BBN and chloride catalyzed reduction of chlorophosphines to phosphines and diphosphines
9-BBN and chloride catalyzed reduction of chlorophosphines to phosphines and diphosphines† Iris Elser,a Ryan J. Andrewsa and Douglas W. Stephan *a Abstract The commercially available Lewis acid, 9-BBN and Lewis basic [Et4N]Cl are used as catalysts for the reduction of chlorophosphines R2PCl in the presence of phenylsilane. Aryl-chlorophosphines afford primarily diphosphines (P2R4) while secondary phosphines predominate for alkyl-substituted precursors.
Silica‐Supported Cationic Tungsten Imido Alkylidene Stabilized by an N‐Heterocyclic Carbene Ligand Boosts Activity and Selectivity in the Metathesis of α‐Olefins
Communication Christophe Copéret Corresponding Author E-mail address: ccoperet@inorg.chem.ethz.ch Eidgenossische Technische Hochschule Zurich, Laboratory of Inorganic Chemistry, Vladimir-Prelog-Weg 1-5/10, HCI H 229, 8093 Zürich, SWITZERLAND Search for more papers by this author PDF ShareShare Get access to the full version of this article. View access options below. Institutional Login Loading institution options... If you have previously obtained access with your personal account, Please log in.
Origin and Use of Hydroxyl Group Tolerance in Cationic Molybdenum Imido Alkylidene N‐Heterocyclic Carbene Catalysts
Research Article Michael Rudolf Buchmeiser Corresponding Author E-mail address: michael.buchmeiser@ipoc.uni-stuttgart.de Universität Stuttgart, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Pfaffenwaldring 55, 70569 Stuttgart, GERMANY Search for more papers by this author PDF PDF Share Abstract The origin of hydroxyl group tolerance in neutral and especially cationic molybdenum imido alkylidene N‐heterocyclic carbene (NHC) complexes has been investigated.
Olefin Metathesis in Confined Geometries: A Biomimetic Approach toward Selective Macrocyclization
The synthesis of macrocycles is severely impeded by concomitant oligomer formation. Here, we present a biomimetic approach that utilizes spatial confinement to increase macrocyclization selectivity in the ring-closing metathesis of various dienes at elevated substrate concentration up to 25 mM using an olefin metathesis catalyst selectively immobilized inside ordered mesoporous silicas with defined pore diameters.
Synthesis of trans-Isotactic Poly(norbornene)s through Living Ring-Opening Metathesis Polymerization Initiated by Group VI Imido Alkylidene N-Heterocyclic Carbene Complexes
The selectivity of several molybdenum and tungsten imido alkylidene N-heterocyclic carbene (NHC) complexes in the ring opening metathesis polymerization (ROMP) of enantiomerically pure endo,exo-2,3-dicarbomethoxynorborn-5-ene (DCMNBE) was examined by 1H- and 13C NMR spectroscopy. With one exception, all complexes showed a strong bias toward the formation of trans-isotactic polymers, some yielding polymers based on >98% trans-isotactic repeat units.
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