Homogeneous Catalysts Based on Silane Dendrimers Functionalized with Arylnickel(II) Complexes
Joan W. J. Knapen,Alexander Van Der Made,Janine C. de Wilde,Piet W. N. M. van Leeuwen,Peter Wijkens,David M. Grove,Gerard van Koten +6 more
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In this paper, the synthesis of polysilane dendrimers (high-branched macromolecules) with metal-containing catalytically active sites is described.Abstract:
AT the interface between heterogeneous and homogeneous catalysis there is great scope for the development of new materials that combine the advantages and/or minimize disadvantages associated with each of these classes. In particular there is a need for homogeneous catalysts with properties that allow their ready removal from a product-containing solution. One approach to such materials is to anchor homogeneous catalysts to soluble polymer supports1; we have recently prepared such catalytic materials in which the active centre is an organometallic species2,3. One disadvantage encountered when anchoring catalytic metal sites to polymers is the difficulty of accurate control of the number and location of these sites. Here we report an alternative approach—the synthesis of polysilane dendrimers (highly branched macromolecules4–6) which are functionalized at their periphery with metal-containing catalytically active sites. These dendrimers show regiospecific catalytic activity for the Kharasch addition of polyhalogenoalkanes to carbon–carbon double bonds. It should be possible to remove the nanoscale catalytic macromolecules of this type from the solution of products using filtration methods.read more
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References
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Starburst Dendrimers: Molecular-Level Control of Size, Shape, Surface Chemistry, Topology, and Flexibility from Atoms to Macroscopic Matter
TL;DR: Starburst dendrimers are three-dimensional, highly ordered oligomeric and polymeric compounds formed by reiterative reaction sequences starting from smaller molecules—“initiator cores” such as ammonia or pentaerythritol.
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Synthesis of an Organosilicon Dendrimer Containing 324 Si-H Bonds
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Dendrimers, Arborols, and Cascade Molecules: Breakthrough into Generations of New Materials
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Arborols Based on Luminescent and Redox‐Active Transition Metal Complexes
Scolastica Serroni,Gianfranco Denti,Sebastiano Campagna,Alberto Juris,Mauro Ciano,Vincenzo Balzani +5 more
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Electronic Tuning of Arylnickel(II) Complexes by Para Substitution of the Terdentate Monoanionic 2,6-Bis[(dimethylamino)methyl]phenyl Ligand
G. van Koten,L.A. van de Kuil,J. Luitjes,David M. Grove,Jan W. Zwikker,J. G. M. Van Der Linden,A. M. Roelofsen,Leonardus W. Jenneskens,Wiendelt Drenth +8 more