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New N, N′ -substituted imidazolium salts and their corresponding diiodopyridinepalladium (II) complexes were successfully synthesized and supported on KCC-1 (KCC-1/Pd-NHC-Py) has been developed for synthesis of pyridopyrimidinones, providing excellent yields of the corresponding products with remarkable chemoselectivity. This morphology ultimately leads to higher catalytic activity for the KCC-1-supported nanoparticles. The KCC-1/Pd-NHC-Py NPs were thoroughly characterized by using TEM, FESEM, TGA, and BET. We supported a drug on the surface of a silica and used as a catalyst for synthesis another drug. [ABSTRACT FROM AUTHOR]

We have found that fibrous nanosilica (KCC-1) can used as a excellent support for the synthesis of highly sparse nanoparticles. KCC-1 has high surface area that was functionalized with 1,3-bis(dimethylthiocarbamoyloxy)benzene groups acting as the strong performers so that the Pd (II) was complex without aggregation on the fibers of the KCC-1 microspheres (KCC-1/BTB/Pd). For synthesis of 3-sulfenylindoles from aryl iodide, indoles, and thiourea used from the KCC-1/BTB/Pd NPs as a catalyst that showed excellent catalytic activities under green conditions. Compared with the traditional substrate, KCC-1/BTB/Pd substantially increases protection and the accessibility of the nanoparticle sites due to its three dimensional hierarchical structure. [ABSTRACT FROM AUTHOR]

A new type of catalyst based on the ionic liquid (IL) modified fibrous nano-silica material KCC-1, with a high surface area, as the support and PbS nanoparticles (NPs) as the active sites (KCC-1/IL/PbS), has been successfully prepared through a facile and environmentally-friendly approach and characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and thermal gravimetric analysis (TGA). The synthesized catalyst exhibited high catalytic performance in the selective dehydrogenation of aqueous solutions of HCOOH/HCOONa to H 2 and CO 2 gas due to not only the unique dendritic fibrous morphology of the support, which made the active sites accessible, but also the synergistic effect between KCC-1/IL and the small PbS NPs. Additionally, KCC-1/IL/PbS had good recyclability, mainly attributed to the IL groups, which acted as robust anchors to avoid PbS NP leaching from the support. This synthetic method provides a green way to effectively prepare low cost PbS based catalysts and is promising for the development of other useful materials. [ABSTRACT FROM AUTHOR]

In this study, The HPG@KCC-1 NP was prepared through the ringopening polymerization of glycidol on the surface of KCC-1 to form HPG@KCC-1 and then HPG@KCC-1 NPs were functionalized using chlorodiphenylphosphine and phosphine-functionalized nanoparticles (HPG@KCC-1/PPh 2 ) as a recyclable phosphorus ligand was obtained. Also, gold (III) complex of HPG@KCC-1/PPh 2 ligand (HPG@KCC-1/PPh 2 /Au) was prepared which used for the cyclization of propargylic amines with CO 2 to provide 2-oxazolidinones. High catalytic activity and ease of recovery from the reaction mixture using filtration, and several reuse times without significant losses in performance are additional eco-friendly attributes of this catalytic system. [ABSTRACT FROM AUTHOR]

In this study, a novel fibrous nano-silica (KCC-1) supported ionic liquid (KCC-1/IL) with high surface area and easy accessibility of active sites was successfully developed by a facile approach. The synthesized KCC-1/IL nanocatalyst exhibited excellent catalytic activity for the synthesis of quinazoline-2,4(1 H ,3 H )-diones from CO 2 and 2-aminobenzonitriles under mild conditions to the easy accessibility of the active sites. A high catalytic activity and ease of recovery from the reaction mixture by using filtration and several reuses without any significant loss in performance are additional eco-friendly attributes of this catalytic system. [ABSTRACT FROM AUTHOR]

An efficient and general method has been developed for synthesis of 1,3-thiazolidin-4-ones using magnetite nanoparticles immobilized Salen–Mn–ionic liquids as an efficient and recyclable catalyst. The inorganic, magnetic, solid base catalyst was characterized via N 2 sorption, TEM, VSM, TGA, XRD, FTIR, and UV–vis. Nanocatalyst can be easily recovered by a magnetic field and reused for subsequent reactions for at least 6 times with less deterioration in catalytic activity. [ABSTRACT FROM AUTHOR]

A magnetically ionic liquid (ILs) supported on FeNi 3 nanocatalyst was synthesized and evaluated as a recoverable catalyst for the synthesis of 1,3-thiazolidin-4-one. The main targets are solvent-free conditions, rapid (immediately) and easy immobilization technique, and low cost precursors for the preparation of highly active and stable MPs with high densities of functional groups. The inorganic, magnetic, solid base catalyst was characterized via Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The catalyst is active for the synthesis of 1,3-thiazolidin-4-ones and the products are isolated in high to excellent yields. Supporting this base catalyst on magnetic particles offers a simple and non-energy-intensive method for recovery and reuse of the catalyst by applying an external magnet. Isolated catalysts were reused for new rounds of reactions without significant loss of their catalytic activity. [ABSTRACT FROM AUTHOR]

Highlights: [•] A methylene dipyridine based catalyst supported on Fe3O4 nanoparticles was synthesized. [•] It was used as a recyclable catalyst for the synthesis of pyrazolophthalazinyl spirooxindoles. [•] Pyrazolophthalazinyl spirooxindoles were obtained in good to high yields. [•] In this method, catalyst separation was easily performable by a magnetic bar. [ABSTRACT FROM AUTHOR]

• A new family of high surface area phosphosilicat nanosheet (FPS) with fibrous morphology was prepared. • [Ru(DMSO) 4 Cl 2 ] complex over triazole functionalized FPS. • FPS/Ligand/Ru was characterized and employed as photocatalytic for reduction of CO 2. • This system could be considered as perfect nanocatalyst by using the host–guest approach. In this work we report the design and synthesis of high-surface-area nanocatalysts by reaction between tripolyphosphate (TPP) and tetraethyl orthosilicate (TEOS) and then the complex ruthenium acetate anchored over the click modified ligand of fibrous phosphosilicate (FPS), forms a new highly efficient nano catalyst that shows excellent catalytic performance within CO 2 reduction to formate under visible-light irradiation. The FPS/Ligand/Ru nanocatalyst was thoroughly characterized by Fourier transform infrared spectra (FTIR), Powder X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), Energy dispersive X-ray spectroscopy (EDX), and N 2 adsorption/desorption study. [ABSTRACT FROM AUTHOR]

Abstract This study investigated the potential application of an efficient, easily recoverable, and reusable dendritic fibrous nanosilica (DFNS) magnetic nanoparticle catalyst, which supported cobaloxime complexes and corresponding to positively charged phosphonium linked cobaloximes (FeNi 3 /DFNS/Cobaloxime/PCPL MNPs) for catalytic reduction of 4-NP and 2-NA. FeNi 3 /DFNS/Cobaloxime/PCPL MNPs were thoroughly characterized by using TEM, FE-SEM, VSM, TGA, ICP-MS, and BET. Analysis of the recycled catalyst by ICP-MS showed only minor modifications in its morphology after the reaction and thus confirmed the strength of the catalyst. Graphical abstract Image 1 Highlights • The phosphonium linked cobaloximes attached onto the surface of FeNi 3 /DFNS. • FeNi 3 /DFNS/Cobaloxime/PCPL MNPs used for reduction of 4-NP and 2-NA of alkylphenols. • This system could be considered as perfect nanocatalyst by using the host–guest approach. [ABSTRACT FROM AUTHOR]