title: A solid-state NMR investigation of the structure of mesoporous silica nanoparticle supported rhodium catalysts.
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 (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.
authors.affiliation: US DOE Ames Laboratory, Iowa State University, Ames, IA 50011, USA.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Rapp
authors.forename: Yulin
authors.initials: Y
authors.lastname: Huang
authors.forename: Michael
authors.initials: M
authors.lastname: Natella
authors.forename: Yang
authors.initials: Y
authors.lastname: Cai
authors.forename: Victor S-Y
authors.initials: VS
authors.lastname: Lin
authors.forename: Marek
authors.initials: M
authors.lastname: Pruski
mesh_terms: 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*
chemical_list: D012822:Silicon Dioxide; D012238:Rhodium