Synthesis, Solid‐State NMR Characterization, and Application for Hydrogenation Reactions of a Novel Wilkinson's‐Type Immobilized Catalyst. Issue 4 (12th December 2013)

• Record Type: Journal Article
• Authors: Abdulhussain, Safaa; Breitzke, Hergen; Ratajczyk, Tomasz; Grünberg, Anna; Srour, Mohamad; Arnaut, Danjela; Weidler, Heiko; Kunz, Ulrike; Kleebe, Hans Joachim; Bommerich, Ute; Bernarding, Johannes; Gutmann, Torsten; Buntkowsky, Gerd
• Is Part Of: Chemistry. Volume 20:Issue 4(2014)
• Page Start: 1159
• Page End: 1166
• Publication Date: 2013-12-12
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201303020
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 RhCl₃<bold>⋅</bold><italic>x</italic> H₂O as a precursor. The triphenylphosphine units and rhodium as Rh^I provide an environment to form Wilkinson's catalyst‐like structures. Employing multinuclear (³¹P, ²⁹Si, and ¹³C) 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 <italic>para</italic>‐enriched hydrogen gas (PHIP experiments) and an assessment of its leaching properties are presented.</p> </abstract>