'Click' Silica‐Supported Sulfonic Acid Catalysts with Variable Acid Strength and Surface Polarity
| Autor: | Eric M. Gaigneaux, Eric Breynaert, Alain M. Jonas, Josefine Schnee, Antony E. Fernandes, Palraj Kasinathan, Cécile D'Haese, Sambhu Radhakrishnan, Charlotte Lang, Johan A. Martens |
|---|---|
| Přispěvatelé: | UCL - SST/IMCN/MOST - Molecules, Solids and Reactivity, UCL - SST/IMCN/BSMA - Bio and soft matter |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
010405 organic chemistry esterification Organic Chemistry Triazole General Chemistry Sulfonic acid 010402 general chemistry Ring (chemistry) 01 natural sciences Combinatorial chemistry Catalysis Cycloaddition supported catalysis 0104 chemical sciences Acid strength chemistry.chemical_compound chemistry multifunctional catalysts Click chemistry Moiety sulfonic acid CuAAC |
| Zdroj: | Chemistry – A European Journal, Vol. 25, no.27, p. 6753-6762 (2019) |
| Popis: | Solid acid catalysts are central in our chemical industry and are major players in the valorization of bioresources. However, there is still a need to develop solid acid catalysts with enhanced acid strength and improved, or tunable, physicochemical profile to enhance the efficiency and sustainability of chemical processes. Here, we present a modular approach to tune the acid strength and surface polarity of silica-supported sulfonic acid catalysts based on a versatile copper-catalyzed azide-alkyne cycloaddition (CuAAC)-based anchoring scheme. We precisely take advantage of the CuAAC-formed triazole link to enhance the activity of the grafted sulfonic acids and to pair the acid sites with secondary hydrophobic functions. The beneficial effects of both the triazolium link and the paired hydrophobic site, as well as the optimal positioning of the sulfonic moiety on the triazole ring, are discussed in model esterification reactions. ispartof: Chemistry vol:25 issue:27 pages:6753-6762 ispartof: location:Germany status: Published online |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|