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3 article(s) from Luque, Rafael

New bio-nanocomposites based on iron oxides and polysaccharides applied to oxidation and alkylation reactions

Daily Rodríguez-Padrón,
Alina M. Balu,
Antonio A. Romero and
Rafael Luque

Full Research Paper
Published 21 Sep 2017

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1. Graphical Abstract
2. Figure 1: Overview of the preparation of the nanocomposites based on iron oxide and polysaccharide.
  
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3. Figure 2: XPS spectra of A: Fe₂O₃-PS4, B: Fe₂O₃-PS4-MNP and C: TiO₂-Fe₂O₃-PS4 nanohybrids.
  
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4. Figure 3: A and B: SEM and TEM images of TiO₂-Fe₂O₃-PS4; C and D: SEM and TEM images of Fe₂O₃-PS4. E and F: S...
  
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5. Figure 4: DRIFT spectra of A: TiO₂-Fe₂O₃-PS4 and B: Fe₂O₃-PS4-MNP nanohybrids.
  
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6. Scheme 1: Oxidation of benzyl alcohol to benzaldehyde.
  
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7. Figure 5: Conversion and selectivity of the oxidation of benzyl alcohol for the three catalytic systems.
  
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8. Scheme 2: Microwave-assisted alkylation of toluene with benzyl chloride.
  
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9. Figure 6: Conversion and selectivity of the microwave-assisted alkylation of toluene for the three catalytic ...
  
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10. Scheme 3: Alkylation of toluene with benzyl chloride with conventional heating.
  
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11. Figure 7: Conversion and selectivity of the alkylation of toluene with conventional heating for the three cat...
  
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12. Figure 8: Reusability of the iron oxide/polysaccharide nanohybrids.
  
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Beilstein J. Org. Chem. 2017, 13, 1982–1993, doi:10.3762/bjoc.13.194

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Mechanochemical synthesis of graphene oxide-supported transition metal catalysts for the oxidation of isoeugenol to vanillin

Ana Franco,
Sudipta De,
Alina M. Balu,
Araceli Garcia and
Rafael Luque

Full Research Paper
Published 21 Jul 2017

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1. Graphical Abstract
2. Figure 1: N₂ isotherms of (a) RGO, (b) Fe/RGO, and (c) Co/RGO.
  
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3. Figure 2: SEM images of (a and b) RGO, (c) 1% Fe/RGO, and (d) 1% Co/RGO.
  
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4. Figure 3: TEM micrographs at different magnifications of (a and b) RGO, (c and d) 1% Fe/RGO, and (e and f) 1%...
  
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5. Figure 4: Powder XRD patterns of RGO supported Fe and Co NPs.
  
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6. Figure 5: IR spectra of 1% Fe/RGO and 1% Co/RGO catalysts collected by using diffuse reflectance infrared tra...
  
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Beilstein J. Org. Chem. 2017, 13, 1439–1445, doi:10.3762/bjoc.13.141

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Ultrasound-promoted organocatalytic enamine–azide [3 + 2] cycloaddition reactions for the synthesis of ((arylselanyl)phenyl-1H-1,2,3-triazol-4-yl)ketones

Gabriel P. Costa,
Natália Seus,
Juliano A. Roehrs,
Raquel G. Jacob,
Ricardo F. Schumacher,
Thiago Barcellos,
Rafael Luque and
Diego Alves

Full Research Paper
Published 11 Apr 2017

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1. Graphical Abstract
2. Figure 1: Biologically relevant selanyl-1,2,3-triazoles.
  
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3. Scheme 1: General scheme of the reaction.
  
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4. Scheme 2: Comparative study of the conventional conditions and ultrasound irradiation. Conditions A: Reaction...
  
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5. Scheme 3: Reaction of 2-azidophenyl phenyl selenide 1a with activated ketones 2f–k.
  
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Beilstein J. Org. Chem. 2017, 13, 694–702, doi:10.3762/bjoc.13.68

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