A5049617895- Catalytic C–H Functionalization Methods
- Advancements in Battery Materials
- Extraction and Separation Processes
- Recycling and Waste Management Techniques
- Chemical Synthesis and Analysis
- Synthesis and Characterization of Pyrroles
- Synthetic Organic Chemistry Methods
- Asymmetric Hydrogenation and Catalysis
- Molecular Sensors and Ion Detection
- Fluorine in Organic Chemistry
- Synthesis and Catalytic Reactions
- Catalytic Cross-Coupling Reactions
- Luminescence and Fluorescent Materials
- Radical Photochemical Reactions
- Oxidative Organic Chemistry Reactions
- Catalytic Processes in Materials Science
- Advanced biosensing and bioanalysis techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanomaterials for catalytic reactions
- Crystallization and Solubility Studies
- Photochemistry and Electron Transfer Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Fuel Cells and Related Materials
- Surface Chemistry and Catalysis
- Catalytic Alkyne Reactions
Cornell University
2024
Wuhan University of Science and Technology
2021-2022
University of Minnesota
2020-2022
Twin Cities Orthopedics
2020-2022
University of Minnesota System
2021
Southern University of Science and Technology
2018-2021
Minneapolis Institute of Arts
2020
Hydride abstraction represents a promising yet underexplored approach in the functionalization of C-H bonds. In this work, we report oxidation α-C-H bonds ethers via oxoammonium catalysis using 3-chloroperbenzoic acid (
We report the development of oxoammonium-catalyzed oxidation N-substituted amines via a hydride transfer mechanism. Steric and electronic tuning catalyst led to complementary sets conditions that can oxidize broad scope carbamates, sulfonamides, ureas, amides into corresponding imides. The reaction was further demonstrated on 100-g scale using continuous flow setup.
Considering the increasing price of raw materials and environmental pollution, recycling used lithium battery cathode has very important economic value. In this experiment, a green method is to recover valuable metals from spent LiNi 0.6 Co 0.2 Mn O 2 batteries using DL‐malic acid H as leaching system. The effects reaction temperature, concentration, volume time, solid–liquid ratio on efficiency are investigated by orthogonal single variable condition experiments. Under optimum conditions,...
α-Diimines are commonly used as supporting ligands for a variety of transition metal-catalyzed processes, most notably in α-olefin polymerization. They also precursors to valuable synthetic targets, such chiral 1,2-diamines. Their synthesis is usually performed through acid-catalyzed condensation amines with α-diketones. Despite the simplicity this approach, accessing unsymmetrical α-diimines challenging. Herein, we report Ti-mediated intermolecular diimination alkynes afford symmetrical and...
The synthesis and characterization of a platinum(II) terpyridine system tethered with latent organic dye rhodamine derivative as colorimetric luminescent sensory moiety is reported to show selective Hg2+ ion sensing behavior. interplay aggregation/deaggregation behavior the alkynylplatinum(II) complex ring-opening process was investigated. spectral change aggregation near-infrared emission at 800 nm fluorescence 585 provides possible ratiometric luminescence measurement. Morphological...
Multisubstituted pyrroles are commonly found in many bioactive small molecule scaffolds, yet the synthesis of highly-substituted pyrrole cores remains challenging.
We report the development of oxoammonium-catalyzed oxidation N-substituted amines via a hydride transfer mechanism. Steric and electronic tuning catalyst led to complementary sets conditions that can oxidize broad scope carbamates, sulfonamides, ureas, amides into corresponding imides. The reaction was further demonstrated on 100-g scale using continuous flow setup.
Hydride abstraction represents a promising yet underexplored approach in the functionalization of C–H bonds. In this work, we report oxidation α-C–H bonds ethers via oxoammonium catalysis using 3-chloroperbenzoic acid (mCPBA) as terminal chemical oxidant or by means electrochemistry. Mechanistic studies revealed intricate equilibria and interconversion events between various catalytic intermediates presence mCPBA, which alone however was incompetent to drive turnover. The addition small...
The synthesis of Al nanocrystals (Al NCs) is a rapidly expanding field, but there are few strategies for size and morphology control. Here we introduce dual catalyst approach the NCs to control both NC shape. By using one that nucleates growth more than second whose ligands affect during growth, can obtain shape resulting NCs. combination two catalysts (1) titanium isopropoxide (TIP), rapid nucleation, (2) Tebbe's reagent, specific facet-promoting yields {100}-faceted with tunable diameters...
Simple Ti amide complexes are shown to act as sources for masked TiII intermediates via several pathways, demonstrated through the investigation of a unique Ti-catalyzed nitrene-coupled transfer hydrogenation 3-hexyne. This reaction proceeds reduction azobenzene by catalyst, wherein both amines and 3-hexyne can serve hydrogen source/reductant forming putative titanaziridines β-H abstraction or titanacyclopentynes protonolysis, respectively.
Triruthenium dodecacarbonyl exhibits increased catalytic activity toward hydrogenation reactions when encapsulated in alumina sol–gels. In this study, we demonstrate structural and electronic changes induced by the encapsulation process. Fourier transform infrared (FTIR) spectroscopy reveals that carbonyl vibrational modes dramatically red shift during aging sol–gel glass. These shifts are attributed to formation of metal hydride: [HRu3(CO)11]−. A comparison FTIR spectrum synthesized...
LiNi1-x-yCoxMnyO2 lithium-ion battery, as the most installed battery of new energy vehicles, is facing problem large-scale scrap. In this paper, (Ni0.1Co0.3Mn0.6)3O4 anode material with a microsphere structure was successfully synthesized by carbonate coprecipitation method, which obtained recycling spent LiNi0.6Co0.2Mn0.2O2 batteries through hydrometallurgy technology. This method eliminates cumbersome separation steps, reduces process cost, and realizes efficient recovery valuable metals....
Metal-mediated inner-sphere N-N coupling is an uncommon route to bond formation. Herein, we report a mechanistic study of pyrazole formation
Main observation and conclusion A new bipyridine fused rhodamine‐like chelating ligand the corresponding transition metal complexes of platinum(II) iridium(III) have been designed, synthesized structurally characterized by X‐ray crystallography. Their photophysical properties acid‐ or ion‐promoted spirocarbon ring‐opening investigated. The show a drastic color change in solution with Hg 2+ ions emergency an absorption band at around 450—600 nm, assignable to ring‐opened ligand. complex was...
Vibrational dynamics were measured by IR pump-probe spectroscopy and two-dimensional for triruthenium dodecacarbonyl the undecacarbonyl hydride that forms when it is encapsulated in an alumina sol-gel glass. For comparison, a salt was also synthesized studied neat solution to identify potential influence of confined solvent environment on experienced carbon monoxide ligands. The vibrational lifetime found be significantly decreased both species relative compound. Conversely, spectral...
<div> <p>An efficient catalytic synthesis of 2-heteroatom-substituted (9-BBN or SnR3) pyrroles via Ti-catalyzed [2+2+1] heterocoupling heteroatom-substituted alkynes is reported. The resulting 2-boryl substituted can then be used in Suzuki reactions a 1-pot sequential fashion, pentasubstituted 2-aryl that are inaccessible previous strategies. </p> </div>
α-Diimines are commonly used as supporting ligands for a variety of transition metal-catalyzed processes, most notably in α-olefin polymerization. They also precursors to valuable synthetic targets, such chiral 1,2-diamines. Their synthesis is usually performed through acid-catalyzed condensation amines with α-diketones. Despite the simplicity this approach, accessing unsymmetrical α-diimines challenging. Herein, we report Ti-mediated intermolecular diimination alkynes afford symmetrical and...
An efficient catalytic synthesis of 2-heteroatom-substituted (9-BBN or SnR3) pyrroles via Ti-catalyzed [2+2+1] heterocoupling heteroatom-substituted alkynes is reported. The resulting 2-boryl substituted can then be used in Suzuki reactions a 1-pot sequential fashion, pentasubstituted 2-aryl that are inaccessible previous strategies.