TY - JOUR
T1 - Synthesis and characterization of versatile MgO-ZrO(2) mixed metal oxide nanoparticles and their applications
AU - Bundaleski, Nenad
AU - Branco, Paula Cristina de Sério
AU - Teodoro, Orlando Manuel Neves Duarte
PY - 2011/1/1
Y1 - 2011/1/1
N2 - A heterogeneous, versatile nano-magnesia-zirconia or MgO-ZrO2 (MZ) catalyst was prepared by an ultra dilution method. The as-synthesised catalyst was characterized by several analytical techniques such as XRD, particle size analysis, BET surface area, thermogravimetric analysis (TGA), differential thermal analysis (DTA), FT-IR spectroscopy, SEM (scanning electron microscope), TEM (transmission electron microscope) and XPS (X-ray fluorescence spectroscopy). The surface area is found to be 268 m(2)g(-1). The catalytic activity of MZ was tested for various important organic reactions such as cross-aldol condensation, N-benzyloxycarbonylation of amines, reduction of aromatic nitrocompounds, and synthesis of 1,5-benzodiazepines. It has been observed that for all reactions MZ shows a good catalytic activity. All corresponding products were obtained in good to excellent yield under mild conditions. The MgO-ZrO2 catalyst can be prepared from inexpensive precursors, has high surface area, and is reusable and recyclable for all reactions.
AB - A heterogeneous, versatile nano-magnesia-zirconia or MgO-ZrO2 (MZ) catalyst was prepared by an ultra dilution method. The as-synthesised catalyst was characterized by several analytical techniques such as XRD, particle size analysis, BET surface area, thermogravimetric analysis (TGA), differential thermal analysis (DTA), FT-IR spectroscopy, SEM (scanning electron microscope), TEM (transmission electron microscope) and XPS (X-ray fluorescence spectroscopy). The surface area is found to be 268 m(2)g(-1). The catalytic activity of MZ was tested for various important organic reactions such as cross-aldol condensation, N-benzyloxycarbonylation of amines, reduction of aromatic nitrocompounds, and synthesis of 1,5-benzodiazepines. It has been observed that for all reactions MZ shows a good catalytic activity. All corresponding products were obtained in good to excellent yield under mild conditions. The MgO-ZrO2 catalyst can be prepared from inexpensive precursors, has high surface area, and is reusable and recyclable for all reactions.
KW - CATALYTIC TRANSFER HYDROGENATION
KW - AMINO-ACIDS
KW - MICROWAVE IRRADIATION
KW - CHEMOSELECTIVE REDUCTION
KW - SOLVENT-FREE CONDITIONS
KW - ROMATIC NITRO-COMPOUNDS
KW - 1,5-BENZODIAZEPINE DERIVATIVES
KW - N-BENZYLOXYCARBONYL DERIVATIVES
KW - SELECTIVE REDUCTION
KW - ALPHA,BETA-UNSATURATED CARBONYLS
U2 - 10.1039/c1cy00259g
DO - 10.1039/c1cy00259g
M3 - Article
SN - 2044-4753
VL - 1
SP - 1653
EP - 1664
JO - Catalysis Science and Technology
JF - Catalysis Science and Technology
IS - 9
ER -