A solid-state NMR investigation of the structure of mesoporous silica nanoparticle supported rhodium catalysts

作者：Rapp Jennifer L; Huang Yulin; Natella Michael; Cai Yang; Lin Victor S Y; Pruski Marek^*

来源：Solid State Nuclear Magnetic Resonance, 2009, 35(2): 82-86.

DOI：10.1016/j.ssnmr.2008.12.004

• Solid-state NMR
• Indirectly detected HETCOR
• Mesoporous silica nanoparticles
• Phosphine ligands
• Oxidation

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 (29)Si NMR experiments. The structural assignments of the rhodium-phosphinosilyl complex were unambiguously determined by employing the novel, indirectly detected heteronuclear correlation ((13)C-(1)H and (31)P-(1)H idHETCOR) techniques, which indicated that oxidation of the attached phosphinosilyl groups and detachment of Rh was enhanced upon syngas conversion.

• 出版日期2009-4