Synthesis of zinc-based metal organic frameworks modified as highlyefficient and recyclable catalysts for Suzuki and Heck cross-coupling reactions

As a unique class of porous materials, metal-organic frameworks (MOFs) are promisingplatforms for creating heterogeneous catalysts [۱]. MOFs with a highly porous structure enableefficient access of reactive molecules to the site of the active metal and are promising asheterogeneous catalysis. Heterogeneous catalysis is superior to homogeneous catalysis because itleads to easier separation, reusability, minimized waste, and cleaner products [۲, ۳]. Therefore,MOFs are used as heterogeneous catalysts to accelerate coupling reactions or as support materialsin various catalysts due to having active catalytic sites in the structure, high surface area, structuraldiversity, and tunable pore size porosity [۴, ۵]. The porosity of MOFs is one of the factors affectingthe rate of Suzuki and Heck cross-coupling reactions. In this research, a new modified Zinc-BasedMetal–Organic Frameworks (MOF-۵) catalyst was synthesized using the solovthermal methodwith high porosity and remarkable thermal stability. The mesostructured MOF-۵ is composed ofthe bond between metal Zn۲+ and ۱, ۴-dicarboxybenzene (PTA). In order to increase the efficiencyand expand the surface area of MOF-۵, from surfactant was used. The MOF-۵ catalyst in Suzukiand heck cross-coupling reactions was easily recovered and recycled in ۶ cycles without significantleaching or loss of catalytic activity.

کلیدواژه ها:

Metal-organic frameworks (MOFs) ، Surfactant ، Heterogeneous catalysis ، Porosity ، Suzuki and Heck