A solid-state NMR investigation of the structure of mesoporous silica nanoparticle supported rhodium catalysts |
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| Authors: | Jennifer L. Rapp Yulin Huang Michael Natella Yang Cai Victor S.-Y. Lin Marek Pruski |
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| Affiliation: | 1. US DOE Ames Laboratory, Iowa State University, Ames, IA 50011, USA;2. Ecole Nationale Superieure des Ingenieurs en Arts Chimiques et Technologiques, Toulouse 31077, France;3. Department of Chemistry, Iowa State University, Ames, IA 50011, USA |
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| Abstract: | A detailed study of the chemical structure of mesoporous silica catalysts containing rhodium ligands and nanoparticles (RhP-MSN) was carried out by multi-dimensional solid-state NMR techniques. The degree of functionalization of the rhodium–phosphinosilyl complex to the surface of the RhP-MSN channels was determined by 29Si NMR experiments. The structural assignments of the rhodium–phosphinosilyl complex were unambiguously determined by employing the novel, indirectly detected heteronuclear correlation (13C–1H and 31P–1H idHETCOR) techniques, which indicated that oxidation of the attached phosphinosilyl groups and detachment of Rh was enhanced upon syngas conversion. |
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