Topics

A reusable CNTs-supported single-atom iron catalyst for the highly efficient synthesis of C-N bonds.

07:00 EST 13th February 2020 | BioPortfolio

Summary of "A reusable CNTs-supported single-atom iron catalyst for the highly efficient synthesis of C-N bonds."

C-N bond formation is regarded as a very useful and fundamental reaction, which is important for the synthesis of nitrogen-containing molecules in both organic and pharmaceutical chemistry. Noble metal and homogeneous catalysts have been used for C-N bond formation frequently, however, there are still some problems for these catalysts such as high cost, serious pollution and low atom economy. Herein the low-toxic and cheaper iron complex was loaded on CNTs and the heterogenous single-atom catalyst (SAC) named Fe-N x /CNTs was prepared. We applied this SAC to the synthesis of C-N bonds for the first time. It was found that Fe-N x /CNTs was an efficient catalyst for the synthesis of C-N bonds from aromatic amines and ketones. The catalytic performance is markedly excellent with the yield up to 96%, 6-fold higher than that of noble metal catalysts such as AuCl 3 /CNTs and RhCl 3 /CNTs. It was suitable for up to 13 aromatic amine substrates with no additives and 17 enaminones were obtained. By using high-angle annular darkfield scanning transmission electron microscopy (HAADF-STEM) in combination with X-ray adsorption spectroscopy (XAS), we have observed iron species of Fe-N x /CNTs were in good dispersion as single atoms and Fe-N x might be the catalytic active site. This Fe-N x /CNTs catalyst has potential industrial application for its seven runs without any significant loss of activity.

Affiliation

Journal Details

This article was published in the following journal.

Name: Chemistry (Weinheim an der Bergstrasse, Germany)
ISSN: 1521-3765
Pages:

Links

DeepDyve research library

PubMed Articles [16002 Associated PubMed Articles listed on BioPortfolio]

Understanding the Origin of Selective Reduction of CO to CO on Single-Atom Nickel Catalyst.

Electrochemical reduction of CO2 to CO offers a promising strategy for regulating the global carbon cycle and providing feedstock for the chemical industry. Understanding the origin that determines th...

The evolution pathway from iron compounds to Fe1(II)-N4 sites through gas-phase iron during pyrolysis.

Pyrolysis is indispensable for synthesizing highly active Fe-N-C catalysts for the oxygen reduction reaction (ORR) in acid, but how Fe, N, and C precursors transform to ORR-active sites during pyrolys...

Probing toluene catalytic removal mechanism over supported Pt nano- and single-atom-catalyst.

Commercial TiO supported 0.20 wt% Pt catalyst is obtained via the molten salt method, and both Pt nanoparticles and single atom Pt sites are observed. It exhibits high catalytic performance for toluen...

Synthesis of carbon nanotubes via chemical vapor deposition: an advanced application in the Management of Electroplating Effluent.

Iron catalyst supported over magnesium oxide had been synthesized with different percentages of Fe, i.e., 0.5, 1, and 5% employing the method of impregnation. These fabricated catalysts were used to g...

Boosting Fenton-Like Reactions via Single Atom Fe Catalysis.

Maximizing the numbers of exposed active sites in supported metal catalysts is important for achieving high reaction activity. In this work, a simple strategy for anchoring single atom Fe on SBA-15 to...

Clinical Trials [6061 Associated Clinical Trials listed on BioPortfolio]

Out-of-Hospital Intubation With Metal Single Use Laryngoscope Blades

New single use laryngoscope metal blades are available for intubation. This type of blade is safer than the reusable ones concerning the interhuman cross infection risk. No clinical studie...

The Effect of Iron Deficiency Anemia During Pregnancy

Iron deficiency anemia during pregnancy is a significant worldwide health problem, affecting 22% of pregnant women in industrialized countries and 52% in non-industrialized countries. Iron...

LithoVue Single Use Disposable Ureteroscope

Most flexible ureteroscopes that are used to treat kidney stones have been reusable. Recently, advances in technology have resulted in single-use (disposable) ureteroscopes to become avail...

Single-use Digital Flexible Ureteroscope vs Nondisposable Fiber Optic vs Digital Ureteroscope

The aim of this trial is to compare the safety, efficacy and cost effectiveness of the three types of scopes.

Comparison of Three Laryngoscope Blades for Orotracheal Intubation in the Operating Room

The purpose of this study is to determinate if there is a difference in performance provided by three laryngoscope blades: plastic single use, metallic single use and metallic reusable bla...

Medical and Biotech [MESH] Definitions

A class of iron-sulfur proteins that contains one iron coordinated to the sulfur atom of four cysteine residues. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)

Iron or iron compounds used in foods or as food. Dietary iron is important in oxygen transport and the synthesis of the iron-porphyrin proteins hemoglobin, myoglobin, cytochromes, and cytochrome oxidase. Insufficient amounts of dietary iron can lead to iron-deficiency anemia.

A multifunctional iron-sulfur protein that is both an iron regulatory protein and cytoplasmic form of aconitate hydratase. It binds to iron regulatory elements found on mRNAs involved in iron metabolism and regulates their translation. Its rate of degradation is increased in the presence of IRON.

A multifunctional iron-sulfur protein that is both an iron regulatory protein and cytoplasmic form of aconitate hydratase. It binds to iron regulatory elements found on mRNAs involved in iron metabolism and regulates their translation. Its RNA binding ability and its aconitate hydrolase activity are dependent upon availability of IRON.

Hemeproteins whose characteristic mode of action involves transfer of reducing equivalents which are associated with a reversible change in oxidation state of the prosthetic group. Formally, this redox change involves a single-electron, reversible equilibrium between the Fe(II) and Fe(III) states of the central iron atom (From Enzyme Nomenclature, 1992, p539). The various cytochrome subclasses are organized by the type of HEME and by the wavelength range of their reduced alpha-absorption bands.

Quick Search


DeepDyve research library

Relevant Topic

Radiology
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...


Searches Linking to this Article