Abstract
Both non-acidic LiNbMoO6 and strongly acidic HNbMoO6 efficiently catalyze the epimerization of sugars including glucose, mannose, xylose, and arabinose in water. The reactions over these oxides reached almost equilibrium within a few hours where yields of corresponding epimers from glucose, xylose, and arabinose were 24-29 %. The layered mixed oxides functioned as heterogeneous catalysts and could be reused without loss of activity, whereas bulk molybdenum oxide MoO3 was completely dissolved during the reaction. A 13C substitution experiment showed that the reaction proceeds through a 1,2-rearrangement mechanism. The surface Mo octahedra were responsible for the activity. The layered HNbMoO6 could also afford mannose from cellobiose through hydrolysis and successive epimerization.
| Original language | English |
|---|---|
| Pages (from-to) | 3769-3772 |
| Number of pages | 4 |
| Journal | ChemSusChem |
| Volume | 8 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - Nov 23 2015 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Chemical Engineering(all)
- Materials Science(all)
- Energy(all)
Cite this
Efficient Epimerization of Aldoses Using Layered Niobium Molybdates. / Takagaki, Atsushi; Furusato, Shogo; Kikuchi, Ryuji; Oyama, S. Ted.
In: ChemSusChem, Vol. 8, No. 22, 23.11.2015, p. 3769-3772.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Efficient Epimerization of Aldoses Using Layered Niobium Molybdates
AU - Takagaki, Atsushi
AU - Furusato, Shogo
AU - Kikuchi, Ryuji
AU - Oyama, S. Ted
PY - 2015/11/23
Y1 - 2015/11/23
N2 - Both non-acidic LiNbMoO6 and strongly acidic HNbMoO6 efficiently catalyze the epimerization of sugars including glucose, mannose, xylose, and arabinose in water. The reactions over these oxides reached almost equilibrium within a few hours where yields of corresponding epimers from glucose, xylose, and arabinose were 24-29 %. The layered mixed oxides functioned as heterogeneous catalysts and could be reused without loss of activity, whereas bulk molybdenum oxide MoO3 was completely dissolved during the reaction. A 13C substitution experiment showed that the reaction proceeds through a 1,2-rearrangement mechanism. The surface Mo octahedra were responsible for the activity. The layered HNbMoO6 could also afford mannose from cellobiose through hydrolysis and successive epimerization.
AB - Both non-acidic LiNbMoO6 and strongly acidic HNbMoO6 efficiently catalyze the epimerization of sugars including glucose, mannose, xylose, and arabinose in water. The reactions over these oxides reached almost equilibrium within a few hours where yields of corresponding epimers from glucose, xylose, and arabinose were 24-29 %. The layered mixed oxides functioned as heterogeneous catalysts and could be reused without loss of activity, whereas bulk molybdenum oxide MoO3 was completely dissolved during the reaction. A 13C substitution experiment showed that the reaction proceeds through a 1,2-rearrangement mechanism. The surface Mo octahedra were responsible for the activity. The layered HNbMoO6 could also afford mannose from cellobiose through hydrolysis and successive epimerization.
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U2 - 10.1002/cssc.201501093
DO - 10.1002/cssc.201501093
M3 - Article
VL - 8
SP - 3769
EP - 3772
JO - ChemSusChem
JF - ChemSusChem
SN - 1864-5631
IS - 22
ER -