A solid-state NMR investigation of the structure of mesoporous silica nanoparticle supported rhodium catalysts.
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.
Rapp
Jennifer L
JL
US DOE Ames Laboratory, Iowa State University, Ames, IA 50011, USA.
Huang
Yulin
Y
Natella
Michael
M
Cai
Yang
Y
Lin
Victor S-Y
VS
Pruski
Marek
M
D002384:Catalysis; D003198:Computer Simulation; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D012238:Rhodium / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
D012822:Silicon Dioxide; D012238:Rhodium