title: Dispersed Ru nanoclusters transformed from a grafted trinuclear Ru complex on SiO2 for selective alcohol oxidation.
abstract: Ru nanoclusters (average diameter = 1.3 ± 0.3 nm) were successfully prepared by using a Ru3 cluster Ru3O(CH3COO)6(H2O)3·(CH3COO) grafted on a pyridine-functionalized SiO2 surface. The pyridine moiety dispersed on the SiO2 surface spread the Ru3 cluster, controlling its surface density, and the nanoclusterization of the Ru cluster proceeded on the surface. The structures of the Ru nanoclusters were characterized by means of elemental analysis; thermogravimetric analysis; FT-IR, UV/vis, and solid-state NMR spectroscopy; BET analysis; X-ray photoelectron spectroscopy; X-ray diffraction; transmission electron microscopy; and Ru K-edge X-ray absorption fine structure analysis. It was found that the catalytic activity for the selective oxidation of alcohol to the corresponding aldehyde using O2 highly depended on the dispersion and structures of the Ru particles, and the Ru nanocluster was found to be efficient in the selective oxidation of a variety of alcohols.
authors.affiliation: Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki, Aichi 444-8585, Japan. smuratsugu@chem.nagoya-u.ac.jp
authors.forename: Satoshi
authors.initials: S
authors.lastname: Muratsugu
authors.forename: Min Hwee
authors.initials: MH
authors.lastname: Lim
authors.forename: Takahiro
authors.initials: T
authors.lastname: Itoh
authors.forename: Wipavee
authors.initials: W
authors.lastname: Thumrongpatanaraks
authors.forename: Mio
authors.initials: M
authors.lastname: Kondo
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Masaoka
authors.forename: T S Andy
authors.initials: TS
authors.lastname: Hor
authors.forename: Mizuki
authors.initials: M
authors.lastname: Tada
mesh_terms: D000438:Alcohols / Q000737:chemistry*; D000447:Aldehydes / Q000138:chemical synthesis* / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size; D011725:Pyridines / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000438:Alcohols; D000447:Aldehydes; D009942:Organometallic Compounds; D011725:Pyridines; D012822:Silicon Dioxide; D012428:Ruthenium; C023666:pyridine