Bimetallic Ru:Co Mesoporous Nanoparticles Stabilized by PEG and Imidazolium Ionic Liquid Based [KIT-6] as an Efficient Heterogeneous Catalyst for Suzuki–Miyaura Cross-Couplings in H2O:EtOH Solution

Abstract

Co nanoparticles stabilized by PEG and imidazolium ionic liquid based mesoporous silica, denoted as Ru:Co NPs@[KIT-6]-PEG&imid 6, has been synthetized by post grafting method and fully characterized by SEM, TEM, XPS, FT-IR and solid-state 13 C and 29 Si NMR spectroscopy. The supported Ru:Co mesoporous nanoparticles catalyst 6 revealed excellent catalytic activity (conversions up to 100%), turnover number (TON) of 770 and turnover frequency (TOF) of 7700 h -1 in the Suzuki-Miyaura cross-coupling of pbromobenzonitrile and phenylboronic acid in H2O:EtOH (1:1) solution under very mild reaction conditions. In addition, the heterogeneous catalyst 6 maintains almost its inherent catalytic activity after the 6th catalytic recycle.

Synthesis of Bimetallic Nanoparticles and Applications—An Updated Review

“…The excellent performance of the bimetallic nanoparticle was linked to the strong adsorption, reduction and co-precipitation of the PEG-coated Ni-Fe. Ru-Co was also stabilized by PEG and used as an efficient heterogeneous catalyst for Suzuki-Miyaura cross-couplings [144]. Bimetallic nanoparticles revealed excellent catalytic activity with a conversion rate of up to 100%.…”

CuO@Ag/NH2-MIL-88B(Fe) Heterojunction Photocatalyst for the Photothermal Codriven Synthesis of Benzimidazoles and Biaryls

“…Since surface plasmon resonance can stimulate the photocatalytic activity, Pd-based catalysts have been modified by alloying with gold (e.g., HUY@S-TOH@AuPd) to generate bimetallic systems. However, the use of noble metal species (e.g., Pd) has raised some economic concerns for industrialization; therefore, other bimetallic systems (Pd-free), for instance, CoPc/NiO, Au/MnO nanopetals, and RuCo NPs@[KIT-6]-PEG/imide have been introduced. Recently, a zirconium-based MOF was utilized for supporting bimetallic NPs for the Suzuki–Miyaura reactions such as Au/Pd@UiO-66-NH 2 and CuPd@NH 2 -UiO-66 …”

Palladium Supported on Porous Organic Polymer as Heterogeneous and Recyclable Catalyst for Cross Coupling Reaction

“…In order to reduce the reaction cost and expand the catalytic application, several metals have displayed analogous catalytic ability in this transformation [ 14 ]. Except for the noble metals, such as Au [ 15 , 16 ], Ru [ 17 ], Pt [ 18 ] and Ag [ 19 ], the low-cost transition metals, such as Cu [ 20 ], Ni [ 21 ], Co [ 22 ] and Fe [ 23 ], have also been investigated by chemists. However, compared with the Pd catalyst, other metal catalyzed coupling reactions still have many disadvantages, such as the low catalyst utilization rate, the ligands with complex structures, and the limited range of substrate scopes.…”