Palladium Supported Mesoporous Silica Nanoparticles as an Efficient Nanocatalyst for the Suzuki Reaction in the Green Reaction Medium

Mesoporous silica materials are important composites because of their wide applications in various fields. Based on the synthesis method and directing agent template, various mesoporous silica compounds have been fabricated and categorized as M41S, SBA, MSU, etc. M41S family is included MCM-41, MCM-50 and MCM-48 and among them,MCM-41 is the most widely studied mesoporous silica. Mesoporous silica nanoparticles (MSNs) are a type of MCM-41 that have particle sizes under 100 nm with interestingproperties such as biocompatibility, controllable particle size or shape and have other features of MCM-41 [1-4]. In the present research work, we have prepared MSNs by base catalyzed sol-gel method and MSN-APS synthesized by reaction of MSN with 3-aminopropyl-3-methoxy silane (APTS). Then a Schiff base containing benzimidazole and its Pd(II) complexes have been supported on MSNs. These MSN-Pd nanoparticles were characterized by several techniques such as FT-IR, LA-XRD, FE-SEM, TEM, EDX, BET and TGA. In view of the wide applications of Schiff bases and their complexes and the unique properties of MSNs, this hybrid composite has been successfully used in Suzuki–Miyauracross‐coupling reactions in green reaction medium.