Synthesis, solid-state NMR characterization, and application for hydrogenation reactions of a novel Wilkinson's-type immobilized catalyst

Chemistry : a European Journal
Safaa AbdulhussainGerd Buntkowsky

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 RhCl3⋅x H2O as a precursor. The triphenylphosphine units and rhodium as Rh(I) provide an environment to form Wilkinson's catalyst-like structures. Employing multinuclear ((31)P, (29)Si, and (13)C) 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.

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Citations

Sep 15, 2014·Solid State Nuclear Magnetic Resonance·Gerd BuntkowskyJohannes Bernarding
Jun 24, 2017·Angewandte Chemie·Kirill V KovtunovBoyd M Goodson
Feb 28, 2018·Angewandte Chemie·Jan-Bernd HövenerEduard Y Chekmenev
Jan 30, 2019·Physical Chemistry Chemical Physics : PCCP·Vladimir V ZhivonitkoIgor V Koptyug
Feb 1, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Dexin GuanSimon B Duckett
Aug 29, 2018·Chemical Communications : Chem Comm·Josh E RichardsSimon B Duckett
Mar 11, 2015·Chemistry : a European Journal·Avelino CormaIgor V Koptyug
Dec 21, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Susheel Kumar NethiChitta Ranjan Patra
Jul 28, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Gerd Buntkowsky, Michael Vogel
May 11, 2021·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Ekaterina V PokochuevaIgor V Koptyug

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