N/Se co-doped porous carbon catalyst derived from a deep eutectic solvent and chitosan as green precursors: Investigation of catalytic activity for metal-free oxidation of alcohols.

Heteroatom-doped porous carbon-based materials with high surface area compared to their metal-based homologs are considered environmentally friendly and ideal catalysts for organic reactions. In this paper, a new method for the convenient fabrication, cost-effective, and high efficiency of nitrogen/selenium co-doped porous carbon-based catalysis (marked as N/SePC-T) was designed. The N/SePC-T catalysts were created from the direct pyrolysis of a eutectic solvent containing choline chloride/urea as the nitrogen-rich carbon source, selenium dioxide as a source of heteroatom and chitosan as a secondary carbon source in different temperatures (T).

Copper oxides supported sulfur-doped porous carbon material as a remarkable catalyst for reduction of aromatic nitro compounds.

Synthesis and manufacturing of metal-organic framework derived carbon/metal oxide nanomaterials with an advisable porous structure and composition are essential as catalysts in various organic transformation processes for the preparation of environmentally friendly catalysts. In this work, we report a scalable synthesis of sulfur-doped porous carbon-containing copper oxide nanoparticles (marked CuO@CS-400) via direct pyrolysis of a mixture of metal-organic framework precursor called HKUST-1 and diphenyl disulfide for aromatic nitro compounds reduction. X-ray diffraction, surface area analysis (BET), X-ray energy diffraction (EDX) spectroscopy, thermal gravimetric analysis, elemental mapping, infrared spectroscopy (FT-IR), transmission electron microscope, and scanning electron microscope (FE-SEM) analysis were accomplished to acknowledge and investigate the effect of S and CuO as active sites in heterogeneous catalyst to perform the reduction-nitro aromatic compounds reaction in the presence of CuO@CS-400 as an effective heterogeneous catalyst.

Organoselenium functionalized SBA-15 as a new catalyst for the cyanide-free conversion of oximes to nitriles.

Background: Here we report a new selenium-based heterogeneous catalyst, which was prepared from the immobilization of diphenyl diselenide on amine-functionalized Santa Barbara Amorphous-15 (SBA-15). The catalyst characterization study has been confirmed by different analysis methods including Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction patterns (XRD), field-emission scanning electron microscopy (FE-SEM), and Brunauer-Emmett-Teller (BET) surface area analysis.

Results: The newly designed catalyst was successfully applied in the green dehydration reaction of oximes to corresponding nitriles in the presence of hydrogen peroxide/air.

Fe/N co-doped mesoporous carbon derived from cellulose-based ionic liquid as an efficient heterogeneous catalyst toward nitro aromatic compound reduction reaction.

Iron and nitrogen-doped carbon substances with abundant active sites that related to dispersion of heteroatom species (Fe and N) on the surface of carbonous structure, are promising choice for eco-friendly catalytic reactions. Herein, cellulose-based ionic liquid (IL) derivative not only employed as the both nitrogen and iron heteroatom precursors, but also has been used as the green and biodegradable substrate. The non-noble Fe-NC@550, was successfully fabricated by convenient carbonization of cellulose-based IL.

One-pot synthesis of propargylamines using magnetic mesoporous polymelamine formaldehyde/zinc oxide nanocomposite as highly efficient, eco-friendly and durable nanocatalyst: optimization by DOE approach.

Magnetic mesoporous polymelamine formaldehyde nanocomposite-incorporating ZnO nanoparticles were successfully synthesized using solvothermal and sol-gel methods. Fourier-transform infrared spectrometry (FT-IR), X-ray diffraction, Brunauer-Emmett-Teller, vibrating sample magnetometer, thermogravimetric analysis, elemental analysis, transmission electron microscopy and field emission scanning electron microscopy techniques were then utilized for evaluation of nanocomposites. The as-prepared nanocomposite can be used as heterogeneous nanocatalyst with remarkable performance for A coupling reaction toward one-pot synthesis of propargylamine and its derivatives under solvent-less condition.

Pyrolysis of functional cellulose by ionothermal method to synthesis of mesoporous triazine carbon for supporting of Pd and its application.

A mesoporous triazine-based carbon (MTC) supported Pd nanoparticles was synthesized and found to be a retrievable and efficient heterogeneous catalyst for Heck cross-coupling reaction between various aryl halides and alkenes. The MTC-supported Pd catalyst is synthesized by ionothermal methodology followed by high temperature pyrolysis of functional cellulose (Cell-CN) and trimerization of nitrile groups in the presence of ZnCl. A combination of different analysis such as FT-IR, Raman, XRD, FE-SEM, HRTEM, N adsorption-desorption isotherm and TGA confirm the successfully preparation of catalyst.

Diphenyl diselenide grafted onto a FeO-chitosan composite as a new nanosorbent for separation of metal ions by effervescent salt-assisted dispersive magnetic micro solid-phase extraction.

Diphenyl diselenide was immobilized on chitosan loaded with magnetite (FeO) nanoparticles to give an efficient and cost-effective nanosorbent for the preconcentration of Pb(II), Cd(II), Ni(II) and Cu(II) ions by using effervescent salt-assisted dispersive magnetic micro solid-phase extraction (EA-DM-μSPE). The metal ions were desorbed from the sorbent with 3M nitric acid and then quantified via microflame AAS. The main parameters affecting the extraction were optimized using a one-at-a-time method.

A Simple and One-pot Synthesis of Tetrahydrobenzo[b]pyrans and Spirooxindoles Catalyzed by H-Fe3O4@DA-SO3H as an Efficient, Light and Reusable Nanocatalyst.

Aim And Objective: One of the principles of green chemistry is using inexpensive reagents and catalysts to design green route for synthesis of organic compounds. Recently magnetic nanoparticles have provided a considerable merits. In this study, hollow Fe3O4@Dopamine-SO3H has been successfully applied for the green synthesis of tetrahydrobenzo[b]pyrans and spirooxindoles via one-pot multi-component reaction.

Magnetic chitosan composite as a green support for anchoring diphenyl diselenide as a biocatalyst for the oxidation of sulfides.

Development of efficient, inexpensive and recyclable catalysts for a reaction under mild and green reaction conditions is still a very marvelous topic. In this work, diphenyl diselenide stabilized on magnetic chitosan as a novel, highly efficient, ecologically safe, cost-effective and magnetically recoverable heterogeneous nano-biocatalyst was prepared and characterized by different techniques, such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometer (VSM). Then, the catalytic activity of resultant nano-biocatalyst was effectively appraised for the chemoselective oxidation of sulfides to sulfoxides using HO as a green oxidant at ambient temperature with a good to high yields without use any organic solvents.

Silver(I) dithiocarbamate on modified magnetic cellulose: Synthesis, density functional theory study and application.

A magnetically retrievable catalytic system involving Ag(I) dithiocarbamate supported on functionalized cellulose was prepared. The structure of this hybrid nano-composite was characterized by various techniques. In addition, to describe the metal-ligand interactions present in the nano-composite, covalent and electrostatic interactions, density functional theory model and quantum theory of atoms in molecule method were employed.

Glutathione conjugated polyethylenimine on the surface of FeO magnetic nanoparticles as a theranostic agent for targeted and controlled curcumin delivery.

Theranostics with the ability to simultaneous monitoring of treatment progress and controlled delivery of therapeutic agents has become as an emerging therapeutic paradigm in cancer therapy. In this study, we have developed a novel surface functionalized iron oxide nanoparticle using polyethyleneimine and glutathione for targeted curcumin (CUR) delivery and acceptable pH sensitive character. The developed magnetic nanoparticles (MNPs) were physicochemically characterized by FT-IR, XRD, FE-SEM and TEM.

Palladium acetate supported on amidoxime-functionalized magnetic cellulose: Synthesis, DFT study and application in Suzuki reaction.

A highly efficient and magnetically retrievable catalytic system involving Pd (II) acetate supported on amidoxime-functionalized cellulose nano-magnetic catalyst (nano-FeO@AOFC/Pd(II)) was prepared. The structure of the organic-inorganic hybrid nanocomposite has been confirmed using various physicochemical techniques such as FT-IR, XRD, TGA, VSM, XPS, HRTEM, SAED, SEM, CHNS, EDAS and ICP-OES. In addition, to describe and go insight to the metal-ligand interactions present in the nano-FeO@AOFC/Pd (II) composite, covalent and electrostatic interactions, density functional theory (DFT) model and quantum theory of atoms in molecule method were employed.

Diphenyl diselenide immobilized on magnetic nanoparticles: A novel and retrievable heterogeneous catalyst in the oxidation of aldehydes under mild and green conditions.

In the present study diselenide stabilized on silica coated FeO magnetic nano particles asa novel, highly efficient and magnetically retrievable heterogeneous catalyst was designed, synthesized and introduced. Full characterization of the newly prepared magnetic nanocatalyst was authenticated using several physico-chemical characterization techniques such as Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction patterns (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometer (VSM). Thereafter, the catalytic performance of this (FeO@SiO-Se) nanocatalyst was investigated in oxidation of aldehydes using HO as the clean oxidant under aqueous conditions.