Ag nanoparticles grafted porous organic polymer as an efficient heterogeneous catalyst for solvent-free A3 coupling reactions

Cu(II)-Based Metal–Organic Framework Loaded with Silver Nanoparticles as a Catalyst for the A3-Coupling Reaction

“…To further assess the composition and chemical valence states, XPS experiments were conducted on 0.5Ag/1 . As shown in Figure a, the whole XPS spectrum of 0.5Ag/1 confirmed the existence of C, N, O, S, Cu, and Ag elements, which was consistent with the EDS and elemental mapping analysis results, and the mass fraction of Ag elements was 0.51% according to the ICP-OES results, and this result is lower than most similar reports ,,− (Tables S3 and S4). The XPS spectra of C 1s could be separated into three peaks at 284.8, 286.64, and 288.85 eV, which corresponded to the CC/C–C, C–N/C–O, and the CO/CN bonds, respectively (Figure b).…”

“…Powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscope (TEM), energy dispersive spectrometer (EDS), X-ray photoelectron spectroscopy (XPS), and BET measurements were all conducted to characterize and confirm the successful loading of Ag NPs in Cu-MOF 1 . In order to examine the catalytic performance of the synthesized nanocomposite 0.5Ag/1 , A 3 -coupling reaction of aldehyde, alkyne, and amine was chosen as the model reaction because the products propargyl amines are not only a kind of versatile intermediates in the synthesis of various chemicals but also important building blocks for many natural products, bioactive molecules, and pharmaceuticals, and some works have demonstrated the superior catalytic capability of porous materials supported Ag NPs for three-component coupling reactions. ,− Catalytic experiment results determined that 0.5Ag/1 possessed high catalytic activity and reusability for the A 3 -coupling reaction of aldehyde, alkyne, and amine.…”

Microporous Polymeric Networks Containing a Long-Term Stable AuI Catalyst for Enyne Cyclization

“…A wide variety of materials have been employed as heterogeneous catalysts, such as zeolites, polymeric resins, , oxides, − silicas, − metal–organic frameworks (MOFs), , covalent–organic frameworks (COFs), , or porous organic polymers (POPs). − Contrary to MOFs and COFs, which are crystalline, POPs are amorphous materials, which results in a wider distribution of the pore size. In this context, POPs have gained attention in many applications such as gas storage, separation, and catalysis due to their high specific surface areas, tunable pore size, and easy functionalization. , Recently, our group has developed a low-cost methodology for preparing POPs by polycondensation reactions made by electrophilic aromatic substitution (EAS) between a ketone presenting electron-withdrawing groups and trifunctional rigid aromatic monomers.…”

PolyHIPEs Containing Hyper-Cross-Linked Resins: Hierarchical Porosity with Broad and Versatile Sorption Properties

“…29 Among the porous polymers, systems based on styrenic monomers have shown high potentials for achieving very high surface area nanostructures through a precise selection of precursors, cross-linkers of suitable lengths, and reaction conditions, 7,30 as well as being functionalized with, for example, N-sites for high CO 2 adsorption, 11,12,31 sulfonic acid, or thiourea for heavy metal ion removal from water 32,33 or metal nanoparticles for efficient catalysts. 34 The objective of this work was to develop high-surface-area micro/meso/macroporous systems for combined adsorption and absorption applications by embedding micro/mesoporous hyper-cross-linked resins in macroporous polyHIPEs. Moreover, embedding the HCLRs in polyHIPEs is a useful approach to more fully exploiting the advantages of the HCLRs, which, as powders, need engineered supporting systems.…”

“…Among the porous polymers, systems based on styrenic monomers have shown high potentials for achieving very high surface area nanostructures through a precise selection of precursors, cross-linkers of suitable lengths, and reaction conditions, , as well as being functionalized with, for example, N-sites for high CO 2 adsorption, ,, sulfonic acid, or thiourea for heavy metal ion removal from water , or metal nanoparticles for efficient catalysts …”