The surface structure of catalysts activated with hydrogen donors as elucidated by multinuclear solid-state NMR.
1H, 27Al and 31P MAS, and 13C and 29Si CP/MAS NMR spectroscopies, were used to characterize catalysts of Pd supported on various solids including SiO2, AlPO4 and Mg3(PO4)2 that were activated with the chiral hydrogen-donor limonene. The above-mentioned techniques were used to check for the formation of an organopalladium complex between Pd2+ atoms and the olefin bonds in the limonene molecule on the catalyst surface. The results are compared with those obtained for catalysts activated in a hydrogen stream.
Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Córdoba, Spain.
M A
MA
Aramendía
V
V
Borau
C
C
Jiménez
J M
JM
Marinas
J R
JR
Ruiz
F J
FJ
Urbano
D000535:Aluminum / Q000737:chemistry; D002247:Carbon Isotopes / Q000737:chemistry; D002384:Catalysis; D053138:Cyclohexenes; D006859:Hydrogen / Q000737:chemistry; D007554:Isotopes / Q000737:chemistry; D000077222:Limonene; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry; D010165:Palladium / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties; D013729:Terpenes / Q000737:chemistry
D002247:Carbon Isotopes; D053138:Cyclohexenes; D007554:Isotopes; D009942:Organometallic Compounds; D013729:Terpenes; D010758:Phosphorus; D010165:Palladium; D006859:Hydrogen; D000077222:Limonene; D000535:Aluminum; D012825:Silicon