Synthesis of sulphonated mesoporous phenolic resins and their application in esterification and asymmetric aldol reactions

Muylaert, Ilke; Verberckmoes, An; Spileers, Jeremy; Demuynck, Anneleen L. W.; Peng, Li; Clippel, Filip de; Sels, Bert F.; Voort, Pascal Van Der

doi:10.1016/j.matchemphys.2012.11.032

Cited by 16 publications

(2 citation statements)

References 36 publications

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“…However, sulfonated carbon materials are notorious for partly hydrolyzing and losing acidic groups under reaction conditions 8c. 10a, 12a, 17 For the carbon materials described here only approximately 45 % of the strong acidity is prone to hydrolyze under aqueous conditions at high temperatures, whereas the other 55 % shows stable catalytic activity. The hydrolyzed strong acidic groups can be more labile sulfonic groups (CSO 3 H) but most probably less stable sulfate groups (COSO 3 H), which hydrolyze more easily.…”

Section: Resultsmentioning

confidence: 95%

Mesoporous Sulfonated Carbon Materials Prepared by Spray Pyrolysis

Duyckaerts¹,

Trotuş²,

Nese³

et al. 2015

ChemCatChem

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A one‐step approach was developed for the production of mesoporous sulfonated carbon materials by means of an aerosol synthesis. Nebulizing a clear aqueous solution of sucrose and sulfuric acid through a heated oven leads to subsequent dehydration, carbonization and sulfonation of the carbohydrate structure, in less than two seconds residence time. Acid site concentrations ranging from 0.1 to 0.6 mmol g−1 can be obtained. Porosity can easily be introduced via salt templating, and can be adjusted by varying the loading and type of salt used. The highest surface area was obtained with Li2SO4, giving a BET surface area of 506 m2 g−1 and a mesopore size distribution between 2 and 8 nm. Fructose dehydration and inulin hydrolysis showed that the porous materials synthesized by salt templating are more active than the bulk ones, especially for inulin hydrolysis, for which the initial activity is enhanced by a factor of seven, making these materials competitive with the most active commercial resins.

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Section: Resultsmentioning

confidence: 95%

Mesoporous Sulfonated Carbon Materials Prepared by Spray Pyrolysis

Duyckaerts¹,

Trotuş²,

Nese³

et al. 2015

ChemCatChem

View full text Add to dashboard Cite

show abstract

“…This observation is in agreement with results obtained in experiments using immobilized chiral primary amine catalysts, a group of material studied scarcely before. 21,[27][28][29][30] In addition to the aromatic aldehyde 2-NBA, the experimental results of the aldol reaction of an aliphatic aldehyde, 2-MPA over PD-, PPD-, PE-and PPE-NH-R catalysts are also presented in Table 1 (entries 12-15). These catalysts exhibited lower activities in the transformation of 2-MPA as compared to 2-NBA, but gave signicantly higher and also reversed enantioselectivities (80-82% (R), 35-67% (S)).…”

Section: Aldol Reactions In Cfbr Conditionmentioning

confidence: 99%