Influence of Site Pairing in Hydrophobic Silica-Supported Sulfonic Acid Bifunctional Catalysts,Langmuir

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Influence of Site Pairing in Hydrophobic Silica-Supported Sulfonic Acid Bifunctional Catalysts
Langmuir ( IF 3.7 ) Pub Date : 2020-11-10 , DOI: 10.1021/acs.langmuir.0c01759
Palraj Kasinathan ₁ , Charlotte Lang ₁ , Eric M. Gaigneaux ₁ , Alain M. Jonas ₁ , Antony E. Fernandes _{1,

2}

Affiliation

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.

中文翻译：

位置配对对疏水性二氧化硅负载的磺酸双功能催化剂的影响

通过允许创建极性较小的环境和改善反应物的分配，将疏水性赋予固体酸催化剂对于调节其性能至关重要。在这里，我们介绍了用于制备包含磺酸（-SO ₃ H）位和疏水癸基（-C ₁₀）的二氧化硅基催化剂的不同方法）通过叠氮化物官能化的介孔二氧化硅平台的同时或顺序后官能化来形成链。在辛醇与乙酸的酯化模型中比较了这套杂化双功能催化剂，并讨论了制备方法的影响以及所得到的位点空间分布。平行地，我们表明，与更传统的具有酸和疏水官能团的随机分布的混合催化剂相比，两个官能团的配对提供了最大的协同作用。

更新日期：2020-11-25

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