Influence of Site Pairing in Hydrophobic Silica-Supported Sulfonic Acid Bifunctional Catalysts
| Autor: | Antony E. Fernandes, Eric M. Gaigneaux, Charlotte Lang, Alain M. Jonas, Palraj Kasinathan |
|---|---|
| Přispěvatelé: | UCL - SST/IMCN - Institute of Condensed Matter and Nanosciences |
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Octanol 02 engineering and technology Surfaces and Interfaces Mesoporous silica Sulfonic acid 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Combinatorial chemistry 0104 chemical sciences Catalysis Acetic acid chemistry.chemical_compound chemistry Pairing Electrochemistry General Materials Science 0210 nano-technology Bifunctional Spectroscopy Hydrophobic silica |
| Zdroj: | Langmuir, (2020) |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | Imparting hydrophobicity to solid acid catalysts is critical to regulating their performances by allowing the creation of a less polar environment and improved partitioning of the reactants. Here we present different approaches for the preparation of silica-based catalysts comprising sulfonic acid (-SO3H) sites and hydrophobic decyl (-C10) chains by either simultaneous or sequential postfunctionalization of an azide-functionalized mesoporous silica platform. This set of hybrid bifunctional catalysts is compared in the model esterification of octanol with acetic acid, and the influence of the preparation methods together with the resulting site spatial distribution is discussed. In parallel, we show that pairing the two functional groups affords a maximum synergistic effect compared to more traditional mixed catalysts with random distributions of acid and hydrophobic functions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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