Silica-Functionalized Sulfonic Acid

Introduction

Polymer-supported catalysts have been widely used in research and in process chemistry due to the easy recovery, high stability, activity, and selectivity. However, their use is restricted because of the easy damage to the organic polymer backbone (thermal or chemical). [¹] One way to overcome this problem of the traditional polymer-­supported catalysts is to change the expensive organic polymer chain to a silica chain having a covalently anchored organic spacer to create organic-inorganic hybrid (interphase) catalysts. [²] In these type of solid acids the reactive centers are highly mobile like homogeneous catalysts and at the same time there is the advantage of recyclability of the heterogeneous catalysts. One of these silica-supported catalysts, silica-functionalized sulfonic acid (SFSA), has been widely used in research and in process chemistry due to its easy recovery, light efficiency, recyclability, and stability. [¹ ]

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