A Pd complex of a NNN pincer ligand supported on γ-Fe₂O₃@SiO₂ as the first magnetically recoverable heterogeneous catalyst for C–P bond forming reactions

Abstract

A Pd complex of the NNN pincer ligand supported on γ-Fe2O3@SiO2 was used as a new catalyst for a phosphonation reaction.

Magnetic nanoparticle‐tethered Schiff base–palladium(II): Highly active and reusable heterogeneous catalyst for Suzuki–Miyaura cross‐coupling and reduction of nitroarenes in aqueous medium at room temperature

“…Additionally, our efforts are targeted towards utilizing these catalysts to develop greener reactions, avoiding the use of organic solvents and high temperatures. Recently developed magnetically recyclable catalysts have proved to be promising, combining the advantages of high activities and facile recovery in heterogeneous catalytic processes . In a continuation of our recent investigation of the application of magnetically recyclable catalysts in cross‐coupling reactions, herein we report the synthesis and characterization of a new nanomagnetic catalyst, a Schiff base–palladium(II) complex anchored on magnetic nanoparticles (SB‐Pd@MNPs), for Suzuki–Miyaura cross‐coupling of various aryl halides with phenylboronic acid and for the reduction of nitroarenes.…”

Cu(II) immobilized on guanidinated epibromohydrin‐functionalized γ‐Fe2O3@TiO2 (γ‐Fe2O3@TiO2‐EG‐Cu(II)): A highly efficient magnetically separable heterogeneous nanocatalyst for one‐pot synthesis of highly substituted imidazoles

“…Likewise, C─N and C═N stretching vibrations (positioned at 1454 and 1662 cm −1 ) were shifted to lower wavenumbers due to the metallation process ( Figure 1d). On the other hand, bands at 1634 and 1401 cm −1 in the spectrum of γ-Fe 2 O 3 @TiO 2 -EG-Cu(II) were related to COO (in acetate), [42] which proved the presence of Cu in the catalyst. The mentioned absorption bands were covered by broad stretching vibration frequencies related to C─N bond.…”

“…FT-IR spectroscopy was engaged to compare the synthesized γ-Fe 2 O 3 @TiO 2 , epibromohydrin-functionalized γ-Fe 2 O 3 @TiO 2 , guanidinated epibromohydrin-functionalized γ-Fe 2 O 3 @TiO 2 and γ-Fe 2 O 3 @TiO 2 -EG-Cu(II) ( Figure 1). The characteristic absorption band related to the stretching vibration of Fe─O bond in γ-Fe 2 O 3 was present at about 571-698 cm −1 , [42] which was covered by the broad absorption band of Ti─O in the TiO 2 lattice at 500-850 cm −1 . [43] Also, the absorption band at 1619 cm −1 and the broad band appearing at 3100-3500 cm −1 were in turn associated with bending and stretching vibrations of the adsorbed water molecules and the surface-attached hydroxyl groups (Figure 1a).…”

High Performance Magnetically Separable G‐C3N4/γ‐Fe2O3/TiO2 Nanocomposite with Boosted Photocatalytic Capability towards the Cefixime Trihydrate Degradation under Visible‐Light

“…Considering the importance of using green and safe light sources and convenient catalyst recovery and recycling in wastewater treatment processes, and in continuation of our persistent research interest in introducing new magnetically recyclable heterogeneous nanocatalysts [40][41][42][43][44][45][46] herein, we have reported the fabrication of a high-performance g-C 3 N 4 /γ-Fe 2 O 3 / TiO 2 nanocomposite. After its characterization by various techniques, it was utilized as a magnetically separable visiblelight-driven photocatalyst towards the CEF degradation under the blue LED illumination.…”