TY - JOUR
T1 - Grafted non-ordered niobium-silica materials
T2 - Versatile catalysts for the selective epoxidation of various unsaturated fine chemicals
AU - Tiozzo, Cristina
AU - Bisio, Chiara
AU - Carniato, Fabio
AU - Guidotti, Matteo
N1 - Funding Information:
C.T. thanks the Italian Ministry of Education, University and Research through the Project “ItalNanoNet” (prot. no. RBPR05JH2P ) for a fellowship. M.G. thanks Regione Lombardia for funding through the Sus-ChemLombardia project (no. 3667 , 29/04/2013).
PY - 2014/10/15
Y1 - 2014/10/15
N2 - Two kinds of niobium(V)-silica catalysts for the selective epoxidation were synthesised by post-synthesis modification of non-ordered mesoporous silica supports, starting from niobocene dichloride via solvent-less organometallic precursor dry impregnation or conventional liquid-phase grafting technique. Grafted Nb/SiO2 solids were used as catalysts, in the presence of aqueous H2O2, for the epoxidation of unsaturated cyclic and terpenic compounds of interest for fine and specialty chemistry, in particular: cyclohexene, 1-methylcyclohexene, limonene, carveol, α-terpineol, isopulegol, carvotanacetol, carvone, as well as squalene and isopulegyl acetate. These catalysts showed high yields (up to 73%) and excellent chemoselectivities to the desired epoxides (up to 98%), also in short reaction times (down to 1 h).
AB - Two kinds of niobium(V)-silica catalysts for the selective epoxidation were synthesised by post-synthesis modification of non-ordered mesoporous silica supports, starting from niobocene dichloride via solvent-less organometallic precursor dry impregnation or conventional liquid-phase grafting technique. Grafted Nb/SiO2 solids were used as catalysts, in the presence of aqueous H2O2, for the epoxidation of unsaturated cyclic and terpenic compounds of interest for fine and specialty chemistry, in particular: cyclohexene, 1-methylcyclohexene, limonene, carveol, α-terpineol, isopulegol, carvotanacetol, carvone, as well as squalene and isopulegyl acetate. These catalysts showed high yields (up to 73%) and excellent chemoselectivities to the desired epoxides (up to 98%), also in short reaction times (down to 1 h).
KW - Grafted catalyst
KW - Heterogeneous catalyst
KW - Hydrogen peroxide
KW - Niobium-silica catalyst
KW - Sustainable epoxidation
KW - Unsaturated terpenes
UR - http://www.scopus.com/inward/record.url?scp=84905649791&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2014.02.027
DO - 10.1016/j.cattod.2014.02.027
M3 - Article
SN - 0920-5861
VL - 235
SP - 49
EP - 57
JO - Catalysis Today
JF - Catalysis Today
ER -