Gutmann, T. ; Ratajczyk, T. ; Xu, Y. P. ; Breitzke, H. ; Grünberg, A. ; Dillenberger, S. ; Bommerich, U. ; Trantzschel, T. ; Bernarding, J. ; Buntkowsky, G. (2010)
Understanding the leaching properties of heterogenized catalysts: A combined solid-state and PHIP NMR study.
In: Solid State Nuclear Magnetic Resonance, 38 (4)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Para-hydrogen induced polarization (PHIP) NMR in solution, combined with solid-state NMR, can be efficiently employed for the highly sensitive in-situ detection of the leaching properties of immobilized catalysts. The knowledge of this property is important for possible applications of PHIP experiments in medicine, biology or industry, where leached catalysts poison the solution of hyperpolarized products. As experimental example Wilkinson's catalyst RhCl(PPh3)(3) (1) immobilized on mesoporous silica is chosen. As model reaction the hydrogenation of styrene in solvents with different polarities (methanol-d(4), acetone-d(6) and benzene-d(6)) is used. A P-31 solid-state MAS-NMR study reveals that there are two different species of catalysts on the silica, namely coordinatively bound catalysts and physisorbed catalyst. Only the second species exhibits substantial leaching, which is visible in a strong PHIP enhancement of the reaction product. (C) 2011 Elsevier Inc. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Gutmann, T. ; Ratajczyk, T. ; Xu, Y. P. ; Breitzke, H. ; Grünberg, A. ; Dillenberger, S. ; Bommerich, U. ; Trantzschel, T. ; Bernarding, J. ; Buntkowsky, G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Understanding the leaching properties of heterogenized catalysts: A combined solid-state and PHIP NMR study |
| Sprache: | Englisch |
| Publikationsjahr: | 2010 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Solid State Nuclear Magnetic Resonance |
| Jahrgang/Volume einer Zeitschrift: | 38 |
| (Heft-)Nummer: | 4 |
| URL / URN: | http://apps.webofknowledge.com/full_record.do?product=WOS&se... |
| Kurzbeschreibung (Abstract): | Para-hydrogen induced polarization (PHIP) NMR in solution, combined with solid-state NMR, can be efficiently employed for the highly sensitive in-situ detection of the leaching properties of immobilized catalysts. The knowledge of this property is important for possible applications of PHIP experiments in medicine, biology or industry, where leached catalysts poison the solution of hyperpolarized products. As experimental example Wilkinson's catalyst RhCl(PPh3)(3) (1) immobilized on mesoporous silica is chosen. As model reaction the hydrogenation of styrene in solvents with different polarities (methanol-d(4), acetone-d(6) and benzene-d(6)) is used. A P-31 solid-state MAS-NMR study reveals that there are two different species of catalysts on the silica, namely coordinatively bound catalysts and physisorbed catalyst. Only the second species exhibits substantial leaching, which is visible in a strong PHIP enhancement of the reaction product. (C) 2011 Elsevier Inc. All rights reserved. |
| Freie Schlagworte: | phip solid-state nmr mas wilkinson's catalyst immobilization parahydrogen-induced polarization hydrogen-induced polarization in-situ homogeneous hydrogenation wilkinsons catalyst stereoselective hydrogenation cyclohexene hydroformylation metal-complexes silica olefins |
| Zusätzliche Informationen: | 755VB Times Cited:9 Cited References Count:62 |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 27 Okt 2014 20:41 |
| Letzte Änderung: | 28 Mai 2019 13:20 |
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