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Synthesis, Solid-State NMR Characterization, and Application for Hydrogenation Reactions of a Novel Wilkinson's-Type Immobilized Catalyst

Abdulhussain, S. ; Breitzke, H. ; Ratajczyk, T. ; Grünberg, A. ; Srour, M. ; Arnaut, D. ; Weidler, H. ; Kunz, U. ; Kleebe, H.-J. ; Bommerich, U. ; Bernarding, J. ; Gutmann, T. ; Buntkowsky, G. :
Synthesis, Solid-State NMR Characterization, and Application for Hydrogenation Reactions of a Novel Wilkinson's-Type Immobilized Catalyst.
In: Chemistry-a European Journal, 20 (4) pp. 1159-1166.
[Artikel], (2014)

Kurzbeschreibung (Abstract)

Silica nanoparticles (SiNPs) were chosen as a solid support material for the immobilization of a new Wilkinson's-type catalyst. In a first step, polymer molecules (poly(triphenylphosphine)ethylene (PTPPE); 4-diphenylphosphine styrene as monomer) were grafted onto the silica nanoparticles by surface-initiated photoinferter-mediated polymerization (SI-PIMP). The catalyst was then created by binding rhodium (Rh) to the polymer side chains, with RhCl(3)xH(2)O as a precursor. The triphenylphosphine units and rhodium as Rh-I provide an environment to form Wilkinson's catalyst-like structures. Employing multinuclear (P-31, Si-29, and C-13) solid-state NMR spectroscopy (SSNMR), the structure of the catalyst bound to the polymer and the intermediates of the grafting reaction have been characterized. Finally, first applications of this catalyst in hydrogenation reactions employing para-enriched hydrogen gas (PHIP experiments) and an assessment of its leaching properties are presented.

Typ des Eintrags: Artikel
Erschienen: 2014
Autor(en): Abdulhussain, S. ; Breitzke, H. ; Ratajczyk, T. ; Grünberg, A. ; Srour, M. ; Arnaut, D. ; Weidler, H. ; Kunz, U. ; Kleebe, H.-J. ; Bommerich, U. ; Bernarding, J. ; Gutmann, T. ; Buntkowsky, G.
Titel: Synthesis, Solid-State NMR Characterization, and Application for Hydrogenation Reactions of a Novel Wilkinson's-Type Immobilized Catalyst
Sprache: Englisch
Kurzbeschreibung (Abstract):

Silica nanoparticles (SiNPs) were chosen as a solid support material for the immobilization of a new Wilkinson's-type catalyst. In a first step, polymer molecules (poly(triphenylphosphine)ethylene (PTPPE); 4-diphenylphosphine styrene as monomer) were grafted onto the silica nanoparticles by surface-initiated photoinferter-mediated polymerization (SI-PIMP). The catalyst was then created by binding rhodium (Rh) to the polymer side chains, with RhCl(3)xH(2)O as a precursor. The triphenylphosphine units and rhodium as Rh-I provide an environment to form Wilkinson's catalyst-like structures. Employing multinuclear (P-31, Si-29, and C-13) solid-state NMR spectroscopy (SSNMR), the structure of the catalyst bound to the polymer and the intermediates of the grafting reaction have been characterized. Finally, first applications of this catalyst in hydrogenation reactions employing para-enriched hydrogen gas (PHIP experiments) and an assessment of its leaching properties are presented.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Chemistry-a European Journal
Band: 20
(Heft-)Nummer: 4
Freie Schlagworte: heterogeneous catalysis para-hydrogen-induced polarization polymer support rhodium solid-state nmr parahydrogen-induced polarization transition-metal-complexes inorganic hybrid materials mesoporous silica heterogeneous hydrogenation recyclable catalyst enantioselective catalysts reusable catalysts spectroscopy nanoparticles
Fachbereich(e)/-gebiet(e): 07 Fachbereich Chemie > Fachgebiet Physikalische Chemie
07 Fachbereich Chemie
Hinterlegungsdatum: 27 Okt 2014 20:33
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287NG Times Cited:2 Cited References Count:88

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