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We fabricated the chiral ArDPEN/Ru species within the nanoparticles of the aluminium (Al/ArDPEN/Ru). Electron microscopy photos and the anatomical properties revealed the uniformly dispersed nanoparticles with active single‐site ruthenium/diamine centres on the exterior nanoparticles shell. Al/ArDPEN/Ru showed catalytic properties for the reaction of CO2 with oxetane, to synthesize the corresponding polycarbonate with minimal amount of ether linkages. TMC is prepared by a backbiting method following ring‐opening of oxetane by the anion initiator, subsequent to carbon dioxide insertion into the ruthenium/diamine bond. The preparation of the copolymer is shown to proceed mostly by method of the anionic ring‐opening polymerization of preformed trimethylene carbonate in the presence of an anion in solution. In addition, the catalyst anatomical heterogeneity of Al/ArDPEN/Ru was characterized by various techniques, including XRD, SEM, TGA, TEM, VSM, and FT‐IR. No leaching of ruthenium into the solution was observed. [ABSTRACT FROM AUTHOR]

In order to carbonize o-phenylenediamine with CO2, an effective approach was used with UV light irradiation by Sn(IV) doping DFNS (SnD) supported CdSnO3 as a catalyst (CdSnO3/SnD). In this catalyst, SnD with the ratios of Si/Sn in the range of 6 to 50 were obtained using the Direct Hydrothermal Synthesis (DHS), and the nanoparticles of CdSnO3 on the surfaces of SnD were reduced in situ. Scanning Electron Microscope (SEM), X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Energy Dispersive Spectroscopy (EDS), and Transmission Electron Microscopy (TEM) were utilized for characterizing CdSnO3/SnD. It was found that CdSnO3/SnD nanostructures could be used for synthesizing o-phenylenediamines due to their effective and novel catalytic behavior through the reaction between o-phenylenediamines and CO2. [ABSTRACT FROM AUTHOR]

Fibrous nanosilica (KCC-1) as a catalyst support was investigated in terms of stability, recycling, and reusability. For the first time, CO2 transformation was performed via the synthesis and application of KCC-1 together with sodium tripolyphosphate (STPP) and 3-aminopropyltriethoxysilane (APTES) as its functionalized derivative. To this goal, KCC-1/STPP NPs were applied to act as a nanocatalyst with excellent catalytic activities under green reaction conditions. [ABSTRACT FROM AUTHOR]

This study investigates the potential application of the (Ammonio)butane-1-sulfonate modified Spirulina (Arthrospira) platensis biomasses in the synthesis of 3-aryl-2-oxazolidinones from CO, ethylene oxide, and anilines. 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. The effects of the structure of ionic liquid on the catalytic performance were investigated and the various reaction conditions were optimized. This observation was exploited in the direct and selective chemical fixation of CO, affording high degrees of CO capture and conversion. Graphical Abstract: [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 fibrous nano-silica supported heteropolyacid-based ionic liquid (KCC-1/IL/HPW), which features easy accessibility of active sites and high catalytic activity, was synthesized by a simple, cost-effective procedure. The KCC-1/IL/HPW nanocatalyst exhibited excellent catalytic activity in the synthesis of cyclic carbonate from carbon dioxide and epoxides under mild conditions. The KCC-1/IL/HPW catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). 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]

The current study reports the synthesis of multi-site ionic liquids immobilized on DFNS (DFNS-IL) in an aqueous medium. Hence, the ruthenium nanoparticles (NPs) are well-dispersed over the DFNS-IL (DFNS-IL@Ru). Its catalytic function for hydroformylation of alkenes using CO2/H2 as a syngas surrogate is described here under mild conditions. Resultants with good to excellent performance were created employing DFNS-IL@Ru nanocatalyst. The structure of the catalyst was specified by a variety of techniques, including FT-IR, XRD, SEM, TGA, AFM, XPS, TEM, and EDX. The stability of the catalytic system was enhanced after releasing a large quantity of DFNS. The recycling state of the catalyst and the procedure of the coupling reactions were repeatedly investigated. [ABSTRACT FROM AUTHOR]

Here, first, the Nd2Sn2O7 NPs were greenly generated in the participation of gum of ferula assa-feotida of SnCl4.5H2O and Nd(NO3)3. The uncontrolled release of CO2 by industrial processes that acidify the oceans and warm the planet has prompted scientists to try different methods to capture CO2 directly from wastewater sources. Considering the morphology of Nd2Sn2O7 NPs, an appropriate exterior layer for CO2 imbibition was created in all catalyst sites. Findings disclosed that Nd2Sn2O7 NPs positively affected the fabrication yield of 3a,4-dihydronaphtho[2,3-c]furan-1(3H)-one through a three-factor coupling reaction of alkynes, allylic chlorides, and carbon dioxide. The technique enjoyed profitable performance and forbearance of functional groups. [ABSTRACT FROM AUTHOR]

Mesoporous metals have excellent surface area. These metals can be used to a variety of catalytic usage, particularly to reduce carbon dioxide in to value-added products. The present paper has utilized nanoparticles of fibrous CoMn2O4 that are proposed through a naive wet chemical reduction method as catalyst to carbon dioxide methanation. It is found that methane formation has highly efficient performance as well as selectivity because of their high porosity, high surface energy and controllable crystallinity as well as high number of atomic steps divisions. The nanocatalyst structure of fibrous CoMn2O4 istotally characterized by taking advantage of different techniques including scanning electron microscopy (SEM), powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and a N2 adsorption/desorption. [ABSTRACT FROM AUTHOR]

Herein, a 2D closely packed bicobalt complex supported by DFNS was first provided. The XPS and EDX pictures of the DFNS/(bicobalt complex) catalysts affirmed that bicobalt complex was well spread on the outer layer of DFNS. The CO2/propylene oxide coupling reactions, employing DFNS/(bicobalt complex) as catalysts were announced. In addition, the catalyst anatomical heterogeneity of DFNS/(bicobalt complex) was characterized by various techniques, including EDX, SEM, TGA, TEM, XPS, and FT-IR. No leaching of cobalt into the solution was observed. The catalytic power of our catalyst was compared with literature reported catalysts for the synthesis of cyclic carbonate. lower temperature, the minimum amount of catalyst, lower pressure of carbon dioxide and shorter reaction time were required for CO2 transformation, using DFNS/(bicobalt complex) NPs. Besides, hot filtration presented a throughout understanding of the catalyst's heterogeneous nature. The easy and applied reusability of the catalyst was observed after the completion of the reaction. [ABSTRACT FROM AUTHOR]

The fibrous nano-silica supported heteropolyacid-based ionic liquid is simply and cost-effectively synthesized and exhibits high catalytic activity in the synthesis of cyclic carbonates (III) under mild and solvent-free conditions. [ABSTRACT FROM AUTHOR]

In this study, a novel ionic gelation (IG) of sodium tripolyphosphate (TPP) and spirulina was prepared that, supported on magnetic fibrous silica nanospheres (Fe3O4/KCC-1/IG), has been developed for the synthesis of N-[(2-hydroxyethoxy)carbonyl]glycine from carbon dioxide, ethylene oxide, and α-amino acid. This morphology ultimately leads to higher catalytic activity for the KCC-1-supported ionic gelation. The Fe3O4/KCC-1/IG MNPs were thoroughly characterized by using TEM, FESEM, VSM, FT-IR, TGA, and BET. We supported an ionic gelation on the surface of silica and used spirulina and TPP as a catalyst; the observations were exploited in the direct and selective chemical fixation of CO2 to afford high degrees of CO2 capture and conversion. [ABSTRACT FROM AUTHOR]

In this paper, we have produced carboxylic acids by the oxidation of various alcohols in the presence of CO2 using SBA-15/IL supported Cu(II) (SBA-15/IL/Cu(II)) as nanocatalyst. The obtained products showed to have excellent yields by taking into account of SBA-15/IL/Cu(II) nanocatalyst. In addition, the analysis of EDX, SEM, TGA, TEM, XPS, and FT-IR showed the heterogeneous structure of SBA-15/IL/Cu (II) catalyst. It is determined that, after using SBA-15 excess, the catalytic stability of the system was enhanced. Moreover, hot filtration provided a full vision in the heterogeneous catalyst nature. The recycling as well as reuse of the catalyst were studied in cases of coupling reactions many times. Moreover, we have studied the mechanism of the coupling reactions. [ABSTRACT FROM AUTHOR]

Herein, we report a chemoselective insertion of CO2 into unsaturated alkyne substrates under ambient conditions, which is achieved over poly (sulfobetain methacrylate) (p(SBMA)) supported Cu2O nanocatalyst (Cu2O/p(SBMA)) and a series of 3a,4-dihydronaphtho[2,3-c]furan-1(3H)-ones, can be obtained in excellent yields. Cu2O/p(SBMA) presents high performance for environment pressure activation and interpolation of CO2 into unsaturated alkyne substrates. This provides an attainable and competent catalyst for interpolation of CO2 into aryl alkynes, and binding allylic chlorides through SN2 mechanism in order to produce efficient ester and lactone heterocycles that are supposed to have favorable utilizations. All in all, these findings signify practical methods of hybrid catalyst development for detailed alterations, including CO2 employment in a green and sustainable manner. [ABSTRACT FROM AUTHOR]

Recently CO2 stabilization has received a great deal of attention because of its probable applications as a rich C1 resource and the synthesis of several fine chemicals can be accomplished through this stabilization. In this study, Sn(IV) doping dendritic fibrous nanosilica (SnD) supported PrVO4 nanoparticles as a catalyst (PrVO4/SnD) was synthesized by a in-situ procedure. The SnD with the ratios of Si/Sn in a variety of 6 to 40 were acquired through direct hydrothermal synthesis (DHS), and PrVO4 NPs on the surfaces of SnD were reduced in-situ. X-Ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and X-ray energy dispersive spectroscopy (EDS) were deployed for identifying the PrVO4/SnD. It is potentially a highly dynamic catalyst in the stabilization of CO2 for the production of 2-oxazolidinones and benzimidazoles. In addition, the catalyst is very easy to recycle and reuse without significant loss of active site Cu metal. PrVO4/SnD NPs as a nanocatalyst for carbon dioxide fixation to synthesis benzimidazoles and 2-oxazolidinones. [ABSTRACT FROM AUTHOR]

In the present research, a new dendritic fibrous nanosilica (DFNS) based nanocatalyst (DFNS/Dy2Ce2O7) that has high surface zone as well as easy availability of active zones has been properly expanded using an easy approach. DFNS that possess high surface zone is functionalized by amino groups working as the anchors such that the nanoparticles of Dy2Ce2O7 are fine-dispersed onto the DFNS microspheres fibres, without any aggregation. The nanoparticles of Dy2Ce2O7 are produced by a green approach in the attendance of gum of ferula assa-foetida of Dy(NO3)3 and (NH4)2Ce(NO3)6 as ceric and dysprosium sources. The structural evaluation of the samples proved the synthesis of Dy2Ce2O7 NPs. Moreover, a straight way for the production of 3-aryl-2-oxazolidinones by carbon dioxide, olefins, and anilines was obtained utilizing nano catalyst of DFNS/Dy2Ce2O7 in the lack of solvent. The reaction works properly at moderate states. This method that is cheap and simple may be used to different olefins that has proper to excellent 3-aryl-2-oxazolidinones productions. The catalyst may be simply recycled for ten times without considerable losing the activity of its catalytic. [ABSTRACT FROM AUTHOR]

Compared to epoxides, converting carbon dioxide (CO2) to cyclic carbonates is proposed as the most appropriate way to synthesize C1 building blocks. In this study, a Pd(II) Schiff base complex is fixed on FeNi3/DFNS nanoparticles and then reacted with melamine to provide a recoverable magnetic heterogeneous nanocomposite of FeNi3/DFNS/salen/Pd(II). It was determined that the FeNi3/DFNS nanoparticles are an appropriate catalyst for the oxidation carboxylation of styrenes with CO2 in a one-step reaction. The FeNi3/DFNS nanoparticles were characterized via XPS, FTIR, EDX, FE-SEM, XRD, TGA, TEM, IC, VSM and BET analyses. The important benefits of this catalyst are its easy work-up, low cost and high efficiency. [ABSTRACT FROM AUTHOR]