Catalytic transformation

Ebook "Modern ylide chemistry: Applications in ligand design, organic and catalytic transformations" covers recent advances in the chemistry of ylidic compounds with focus on their application in the design of ligands with unique donor properties, the development of novel organic transformations as well as the use of ylides in homogenous catalysis.

167p tracanhphuonghoa1007 22-04-2024 6 3   Download

Ebook "Site-selective catalysis" focuses on (1) ligand-controlled site-selective cross-coupling, (2) iron-catalyzed site-selective oxidation of alkyl C– H bonds, (3) catalytic site-selective conjugate addition of conjugated dienones and trienones, (4) site-selective redox-triggered C–C coupling of diols, (5) site-selective cleavage of peptides and proteins, (6) catalyst-controlled site-selective molecular transformations of carbohydrates, (7) site-selective functionalization of complex natural products by peptide-based catalysts, and (8) site-selective acylation of carbohydrates and its app...

237p tracanhphuonghoa1007 22-04-2024 2 2   Download

Ebook "Biomass processing over gold catalysts" describes the valorization of biomass-derived compounds over gold catalysts. Since biomass is a rich renewable feedstock for diverse platform molecules, including those currently derived from petroleum, the interest in various transformation routes has become intense. Catalytic conversion of biomass is one of the main approaches to improving the economic viability of biorefineries.

54p coduathanh1122 27-03-2024 6 1   Download

Ebook "Environmentally benign catalysts: For clean organic reactions" consists of general introduction followed by 11 chapters which is an overview given by several leading national and international scientists. The book appeals to postgraduates, researchers, and chemists working in the field of environmentally benign catalysts as well as catalytic processes.

269p coduathanh1122 27-03-2024 2 1   Download

Ebook "Innovations in green chemistry and green engineering: Selected entries from the encyclopedia of sustainability science and technology" provides a comprehensive introduction to the state-of-the-art in this key area of sustainability research. Worldwide experts present the latest developments on topics ranging from organic batteries and green catalytic transformations to green nanoscience and nanotoxicology.

336p coduathanh1122 27-03-2024 6 1   Download

In ebook "High- and low-valent tris-N-heterocyclic carbene iron complexes: A study of molecular and electronic structure" high valent iron nitride and oxo species have been proposed as key intermediates in many bio-catalytic transformations, but until now these species have proven exceedingly challenging to isolate and study. Iron complexes in high oxidation states can thus serve as models for iron-containing enzymes to help us understand biological systems or aid our development of more efficient industrial catalysts.

145p nhanphanguyet 28-01-2024 8 2   Download

Ebook "Transformation and utilization of carbon dioxide" shows the various organic, polymeric and inorganic compounds which result from the transformation of carbon dioxide through chemical, photocatalytic, electrochemical, inorganic and biological processes. The book consists of twelve chapters demonstrating interesting examples of these reactions, depending on the types of reaction and catalyst.

390p nhanphanguyet 28-01-2024 5 2   Download

Ebook "A study on catalytic conversion of non-food biomass into chemicals: Fusion of chemical sciences and engineering" is catalytic conversion of non-food, abundant, and renewable biomass such as cellulose and chitin to chemicals. In biorefinery, chemical transformation of polymers to valuable compounds has attracted worldwide interest for building sustainable societies. First, the current situation of this hot research area has been summarized well in the general introduction of the thesis, which helps readers to become familiar with this topic.

171p lamquandat 28-12-2023 2 2   Download

Ebook "Proteases and cancer: Methods and protocols" explores the role of proteases in various catalytic classes and cellular processes associated with cancer. The chapters in this book cover topics such as encoding proteolytic enzymes, cleavage sites of proteases, functional catalytic domains of MMPs, zymography, angiogenesis and lymphangiogenesis, genetic and epigenetic alterations of metallopeptidases, and methods to target metalloproteinases.

355p lucchinguyen 28-12-2023 3 2   Download

The structural transformations occurring as a function of increasing temperature in zeolites are of interest because the porous structure, and therefore the physical properties, can significantly change. Zeolites with THO framework type are small-pore materials, which received attention because of their applications in catalytic processes.

7p vironald 15-12-2022 8 2   Download

A novel green approach for the synthesis of silver nanoparticles using erythromycin as a reducing/capping agent is presented. Erythromycin-derived silver nanoparticles were characterized by ultraviolet-visible spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy, X-ray powder diffraction, and Fourier transform infrared spectroscopy. Monodispersed silver nanoparticles showed excellent and promising catalytic activity for reduction of 3 differently charged dyes (eosin B, methylene blue, and rose bengal) in the presence of NaBH4.

10p langthannam 29-12-2021 14 0   Download

This decrease in induction time was due to decrease in the surface area of nanoparticles present within the microgels with an increase in the feed contents of acrylic acid. The decrease in the value of apparent rate constant was due to an increase in the size of nanoparticles fabricated within the microgels with an increase in mol percentage of acrylic acid. The linear relation between apparent rate constant and feed contents of acrylic acid can be used for quantitative analysis of contents of acrylic acid present in polymer microgels.

12p langthannam 29-12-2021 6 0   Download

The present paper describes in situ green immobilization of silver nanoparticles on MnFe2O4@SiO2 nanospheres using Epilobium parviflorum (EP) without using any other toxic chemicals and reducing or stabilizing agents.

12p langthannam 29-12-2021 11 0   Download

This study describes the selective synthesis of C36 -dimer fatty acids, by reacting unsaturated fatty acid at 533 K for 6 h in the presence of montmorillonite and lithium chloride as the catalyst and cocatalyst, respectively. The catalytic performance of different montmorillonite and organic modified montmorillonite catalysts was investigated in the dimerization of technical grade unsaturated fatty acid, and the influence of the catalyst structure and composition on the catalytic performance was analyzed.

13p tudichquannguyet 29-11-2021 6 0   Download

In order to take advantage of the Brønsted acidity of tungstophosphoric acid (TPA) and Lewis acidity of kaolin, TPA-loaded kaolin catalysts with varying percentages of TPA (10–50 wt.-%) were prepared by wet impregnation method. Fourier transform infrared spectrometer, X-ray diffractometer, Brunauer–Emmett–Teller surface area analyzer, and scanning electron microscope characterizations were performed to confirm the successful loading of TPA on kaolin.

10p tudichquannguyet 29-11-2021 8 1   Download

Starting from a chiral secondary alcohol, novel enantiopure 1,4-aminoalkylphenols (AAPs) were prepared by exploiting conventional organic transformations such as the Mitsunobu reaction, Eschweiler–Clarke N -methylation, and demethylation of anisoles. The catalytic activity of the 1,4-AAPs was investigated in enantioselective Et2Zn addition to benzaldehyde. They were found to accelerate the Et2Zn addition to benzaldehyde. High yields and enantioselectivities (e.g., 95% yield and 82% ee) were achieved.

12p tudichquannguyet 29-11-2021 10 1   Download

A set of catalysts having gold nanoparticles deposited on γ-Al2O3 (Au/γ-Al2O3) with lowest effective amount of gold content were prepared by successive impregnation and hydrogen reduction method. The structural features of prepared catalysts were analysed by X-ray diffraction (XRD), N2 physisorption, scanning electron microscopy (SEM), and Fourier transform infrared (FTIR). The catalytic activity was evaluated for the reduction of an organic pollutant 4-nitrophenol (4NP) to 4-aminophenol (4AP) by spectrophotometric analysis.

13p tudichquannguyet 29-11-2021 9 1   Download

Ruthenium nanoparticles stabilized by a hydrotalcite framework (Ru/HTaL) were prepared by following a 2-step procedure comprising a wet-impregnation of ruthenium(III) chloride precatalyst on the surface of HTaL followed by an ammonia-borane (NH3 BH3) reduction of precatalyst on the HTaL surface all at room temperature. The characterization of Ru/HTaL was done by using various spectroscopic and visualization methods including ICP-OES, P-XRD, FTIR, 11 B NMR, XPS, BFTEM, and HRTEM.

16p tudichquannguyet 29-11-2021 7 0   Download

In this study, amidoxime-functionalized silica decorated with copper (AFS-Cu) was fabricated and tested for its catalytic application. Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction were employed to characterize its structure and morphology. The application of AFS-Cu as a catalyst for the catalytic reduction of methylene blue (MB) in aqueous media using NaBH4 as reductant was evaluated. The ability to reuse as well as the effect of catalyst dose and pH of solution on the catalytic activity was investigated.

10p tudichquannguyet 29-11-2021 7 1   Download

Three new dibenzimidazolium salts bridged by 2-methylenepropane-1,3-diyl group were synthesized. Their dinuclear N-heterocyclic carbene Ag(I) complexes were prepared by the reactions of these salts with Ag2 O. The structures of the synthesized compounds were defined by nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FT-IR), elemental analysis, and LC-MSMS (for complexes) techniques. Stability of the silver complexes was confirmed by 1H NMR spectroscopy.

36p tudichquannguyet 29-11-2021 9 0   Download