215367-19-4

Upstream product

• 919-30-2 3-aminopropyltriethoxysilane 
• 90-02-8 salicylaldehyde 
• 3117-61-1 2-(iminomethyl)phenol 

Relevant academic research and scientific papers

Magnetically‐recoverable Schiff base complex of Pd(II) immobilized on Fe3O4@SiO2 nanoparticles: an efficient catalyst for the reduction of aromatic nitro compounds to aniline derivatives

Fe3O4@SiO2/Schiff base/Pd(II) is reported as a magnetically recoverable heterogeneous catalyst for the chemoselective reduction of aromatic nitro compounds to the corresponding amines through catalytic transfer hydrogenation (CTH). In this regard, a small amount of the nanocatalyst (0.52?mol% Pd) and hydrazine hydrate, showing safe characteristics and perfect ability as the hydrogen donor, were added to the nitro substrates. The experiments described the successful reduction of aromatic nitro compounds with good to excellent yields and short reaction times. The catalyst, due to its magnetic property, could be simply separated from the reaction mixture by a permanent magnet and reused in seven consecutive reactions without considerable loss in its activity. Moreover, the leaching of Pd was only 3.6% after the seventh run. Thus, the most striking feature of this method is to use a small amount of the magnetic nanocatalyst along with a cheap and safe hydrogen source to produce the important amine substances selectively, which makes the method economical, cheap, environmentally friendly, and simple. Graphic abstract: [Figure not available: see fulltext.]

Synthesis, Characterization, and Catalytic Activity of Pd(II) Salen-Functionalized Mesoporous Silica

Salen ligand synthesized from 2-hydroxybenzaldehyde and 2-hydroxy-1-naphthaldehyde was used as a palladium chelating ligand for the immobilization of the catalytic site. Mesoporous silica supported palladium catalysts were prepared by immobilizing Pd(OAc)2 onto a mesoporous silica gel through the coordination of the imine-functionalized mesoporous silica gel. The prepared catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), inductivity couple plasma (ICP), nitrogen adsorption-desorption, and Fourier transform infrared (FT-IR) spectroscopy. The solid catalysts showed higher activity for the hydroamination of C-(tetra-O-acetyl-β-D-galactopyranosyl)allene with aromatic amines compared with the corresponding homogenous catalyst. The heterogeneous catalytic system can be easily recovered by simple filtration and reused for up to five cycles with no significant loss of catalytic activity.

Solvent-free oxidation of cyclohexane over covalently anchored transition-metal salicylaldimine complexes to α-zirconium phosphate using tert-butylhydroperoxide

Heterogeneous catalysts were prepared by covalent bonding of transition-metal salicylaldimine complex to α-zirconium phosphate, abbreviated as {α-ZrP.M(salicylaldimine) where M = Co, Mn and Cu}. The resulting compounds were characterized by BET surface ar

A novel magnetic hybrid nanomaterial as a highly efficient and selective catalyst for alcohol oxidation based on new Schiff base complexes of transition metal ions

In this study, novel heterogeneous catalysts of Schiff base complexes of transition metal ions supported on silica coated magnetic metallic cobalt nanoparticles were successfully synthesized. Firstly, silica coated cobalt nanoparticles were synthesized th

Syntheses, structures and immobilization of ruthenium complexes bearing N,O-Schiff-base or N,N′-diamine ligands functionalized with alkoxysilyl groups

Condensation of γ-aminopropyltriethoxysilane and substituted salicylaldehydes in ethanol afforded three new Schiff-base compounds [(EtO)3Si(CH2)3N=CHArOH] (Ar = C6H4, L1H; C6H3(4

Anchoring via covalent binding of a salicylaldimine-nickel complex in multi-walled carbon nanotubes and its application in ethylene oligomerization

Silylated-salicylaldimine nickel(II) (1) was synthesized with 3-aminopropyl-trimethoxysilane, salicylaldimine and NiCl2·6H2O, and carbon nanotube-supported salicylaldimine-nickel catalyst (2) was synthesized by anchoring 1 covalently to multi-walled carbon nanotubes. The chemical structure of the synthesized ligand was characterized by elemental analysis, 1H NMR and FT-IR. Compounds were characterized by XRD, FT-IR, TGA and XPS and were used as precatalysts for ethylene oligomerization. The catalytic activity and the selectivity of C6 olefin for 2 were much higher than those for 1 in ethylene oligomerization. Compared with other cocatalysts, the catalytic activity and selectivity to C6 olefin for 2 were the highest using MAO as cocatalyst. When Al/Ni molar ratio was 700, at 25 °C, 30 min and pressure was 0.5 MPa, the catalytic activity of 5.85 × 106 g·(mol Ni·h)?1 and selectivity of 94.7percent toward C6 olefin for 2 in cyclohexane were observed. Compared with 1, catalyst 2 had the good repeatability and thermal stability, with catalytic activity of 4.29 × 106 g·(mol Ni·h)?1 and the selectivity of C6 olefin was 84.3percent after the third oligomerization reaction.

Photo-and electroluminescence in thin films of covalently bonded azomethin-zinc/SiO2 hybrid materials

We report the design and chemical synthesis of covalently bonded azomethin-zinc/SiO2 hybrid transparent thin films with photoluminescent and electroluminescent emissions in condensed solid state by a sol-gel approach. The Royal Society of Chemi

Liquid Phase Solvent-Less Cyclohexane Oxidation Catalyzed by Covalently Anchored Transition-Metal Schiff Base Complex on α-Titanium Phosphate

Covalently anchored transition-metal salicylaldimine complexes on α-titanium phosphate {α-TiP.M(salicylaldimine) where M = Co, Cr, Cu and Fe} were synthesized by in situ method and characterized by BET surface area, XRD, SEM, EDX, FTIR, TGA and ICP techni

Synthesis and characterization of nanocomposite NiFe2O4@SalenSi and its application in efficient removal of ni(II) from aqueous solution

In this work, nano ferrite spinel NiFe2O4 was synthesized by sol-gel method and characterized by SEM, XRD, FT-IR, and VSM. In second step Schiff base made from salicylaldehyde and amino propyl triethoxy silane was used for modification of the synthesized

A novel Schiff base of Mn(III) complex supported on magnetic cobalt nanoparticles as a highly efficient retrievable heterogeneous catalyst in oxidation of alcohols and sulfides compounds

Abstract A novel Schiff base Mn(III) complex was successfully synthesized and covalently immobilized on silica-coated magnetic cobalt nanoparticles as a support. The prepared heterogeneous catalyst showed a high catalytic activity in the oxidation of alcohols with high yield and in a milder conditions. The synthesized hybrid nanomaterials were fully characterized by FT-IR spectra, XRD and EDAX analysis. Morphology of the nanomaterials was determined by SEM and TEM. Also, the metallic magnetic cobalt and silica in the core-shell structure were determined by XPS analyses. The synthesized catalyst shows a high catalytic activity in the oxidation of alcohols and sulfides to the corresponding aldehydes and sulfoxides. Also the magnetic properties of the magnetic support and hybrid nanomaterials were measured by AGFM analysis.