Highly Dispersed Pd Catalyst Locked in Knitting Aryl Network Polymers for Suzuki–Miyaura Coupling Reactions of Aryl Chlorides in Aqueous Media

Abstract

Highly dispersed palladium chloride catalysts locked in triphenylphosphine-functionalized knitting aryl network polymers (KAPs) are developed and exhibit excellent activity under mild conditions in the Suzuki-Miyaura cross-coupling reactions of aryl chlorides in aqueous media. This work highlights that the microporous polymers not only play the role of support materials, but also protect the Pd species from aggregation and precipitation, hence, positively effect the catalysis activity.

Hierarchically Structured MnO2‐Co/C Nanocomposites: Highly Efficient and Magnetically Recyclable Catalysts for the Aerobic Oxidation of Alcohols

“…[28] To further characterize the porouss tructure of the final nanocomposites, 4 was analyzed by argon adsorption at 77 K. The type IV isotherms evidenced (Figure 1i)d isplay an increasing uptake across the entire range of relative pressures, which is significantly higher than that displayed by the precursor nanosheets in 2;t his suggests the development of extensive micro-and/or mesoporosity. [29] This is confirmed by the corresponding nonlocal density functional theory (NLDFT) pore-size distribution (Figure 1j), which indicates abroad pore-size distribution, with two prominentp eaks centered at approximately d = 1.7 and 3nm. Correspondingly,aBET surface area of 225 m 2 g À1 is evidenced (TableS1), which is the highestv alue reporteds of ar for nanostructured MnO 2 materials.…”

Principles for the Synthesis of Porous Organic Frameworks

“…One successful example is a new strategy reported by Tan et al [17,57,58], which is knitting rigid aromatic building blocks by external cross-linker. Another is the Scholl coupling reaction with AlCl 3 as the catalyst.…”

Highly efficient palladium catalysts supported on nitrogen contained polymers for Suzuki-Miyaura reaction

“…It is highly desirable to develop efficient heterogeneous Pd catalysts for Suzuki-Miyaura reaction. Some heterogeneous Pd catalysts had been developed by immobilizing Pd particles on supports, such as on oxides [14], polymers [15][16][17][18][19][20][21], carbon nanotubes [22], magnetic nanomaterials [23], and silica [24]. Unfortunately, heterogeneous Pd catalysts are generally less active than homogeneous Pd catalysts for Suzuki-Miyaura reaction.…”