A5059560682- Radical Photochemical Reactions
- Crystallization and Solubility Studies
- Catalytic C–H Functionalization Methods
- X-ray Diffraction in Crystallography
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Oxidative Organic Chemistry Reactions
- MXene and MAX Phase Materials
- Vanadium and Halogenation Chemistry
- Porphyrin and Phthalocyanine Chemistry
- Catalytic Cross-Coupling Reactions
- Crystallography and molecular interactions
- Metal-Catalyzed Oxygenation Mechanisms
- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Advanced battery technologies research
- Nanomaterials for catalytic reactions
- Ammonia Synthesis and Nitrogen Reduction
- Hemoglobin structure and function
- Supercapacitor Materials and Fabrication
- Synthetic Organic Chemistry Methods
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Sulfur-Based Synthesis Techniques
- Cyclopropane Reaction Mechanisms
Institut de Recherches sur la Catalyse et l'Environnement de Lyon
2023-2024
Catalyse
2023-2024
Nanning Normal University
2024
Université Claude Bernard Lyon 1
2023
Centre National de la Recherche Scientifique
2023
Zhejiang University of Technology
2017-2020
Chemical Synthesis Lab
2018-2020
SLAC National Accelerator Laboratory
2010
University of California, San Diego
2007-2009
Nanjing University
2007
We studied the selectivity of a functional model cytochrome c oxidase's active site that mimics coordination environment and relative locations Fe(a3), Cu(B), Tyr(244). To control electron flux, we covalently attached this analogs lacking copper phenol onto self-assembled monolayer-coated gold electrodes. When transfer rate was made limiting, both were required to enhance selective reduction oxygen water. This finding supports hypothesis that, during steady-state turnover, primary role these...
In this study, machine learning (ML) models combined with density functional theory (DFT) calculations and Gibbs free energy of hydrogen adsorption (ΔGH*) were employed to facilitate the high-throughput screening evolution reaction (HER) catalysts in various MXene materials. The predicted ΔGH* values show a high-level accuracy via random forest algorithm by using only simple elemental features. A total 299 materials screened DFT four ML (Elman Artificial Neural Networks, kernel ridge...
Hemes (iron porphyrins) are involved in a range of functions biology, including electron transfer, small-molecule binding and transport, O2 activation. The delocalization the Fe d-electrons into porphyrin ring its effect on redox chemistry reactivity these systems has been difficult to study by optical spectroscopies due dominant π→π* transitions, which obscure metal center. Recently, we have developed methodology that allows for interpretation multiplet structure L-edges terms differential...
Lewis acid Mg(ClO4)2, combined with NBS, in CH3CN or EtOAc provided mild and fast bromination of 1,3-dicarbonyl compounds. In particular, this protocol could be applied to the alpha-monobromination alpha-unsubstituted beta-keto esters. Similar catalysis was also extended alpha-chlorination iodination compounds NCS NIS, respectively.
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHighly Enantioselective Atom-Transfer Radical Cyclization Reactions Catalyzed by Chiral Lewis AcidsDan Yang, Shen Gu, Yi-Long Yan, Nian-Yong Zhu, and Kung-Kai CheungView Author Information Department of Chemistry, The University Hong Kong Pokfulam Road, Cite this: J. Am. Chem. Soc. 2001, 123, 35, 8612–8613Publication Date (Web):August 9, 2001Publication History Received11 June 2001Published online9 August inissue 1 September...
Various polycyclic ring skeletons (e.g. 3) are formed from unsaturated α-bromo β-keto esters 1) in a Lewis acid catalyzed atom-transfer tandem radical-cyclization reaction moderate to good yields and with excellent stereoselectivities. Furthermore, the presence of chiral complexes such as [Yb(Ph-pybox)(OTf)3] (2), enantioselective cyclization gave up 84 % ee. OTf = trifluoromethanesulfonate, pybox 2,6-bis(2-oxazolin-2-yl)pyridine.
Chiral α-aminoxy acids of various side chains were synthesized with high optical purity starting from chiral α-amino acids. The conformations diamides 13a−e, 15, and 16 probed by using NMR, FT-IR, CD spectroscopic methods as well X-ray crystallography. right-handed turns eight-membered-ring intramolecular hydrogen bonds between adjacent residues (called the N−O turns) found to be preferred for d-aminoxy acid residues, they independent chains. rigid should have great potential in molecular design.
A close structural analogue of the cytochrome c oxidase active site has been synthesized. Oxygenation at −60 °C leads to a stable Fe(III)-superoxide-Cu(I) intermediate oxy-1 which reacts intramolecularly −40 and faithfully reproduces single turnover reaction that occurs in enzyme leading formation an oxoferryl-cupric-phenoxyl radical species 2.
Five alkyne-containing hemoprotein models have been synthesized in a convergent manner. Sonogashira coupling was used to introduce the alkyne functional group on proximal imidazole before or after being attached porphyrin. One model immobilized onto gold electrode surface via copper(I)-catalyzed azide−alkyne cycloaddition (Sharpless click chemistry).
A pyrrolic-N, B co-doped defective mesoporous carbon (D-BNC) material exhibiting excellent electrochemical ozone production electrocatalytic activity was successfully synthesized.
Transition metal carbides are known as efficient catalysts or catalyst supports and two-dimensional (MXenes) offer renewed possibilities to anchor atoms promote catalytic performances. This paper first presents an in-depth study of the elaboration Pt Pd-loaded Ti3C2Tx MXenes their unstacking for gas-phase catalysis investigations, along with step-by-step characterization by XRD, XPS, SEM STEM. In particular, influence MXene preparation method (HF vs. LiF-HCl etchants) on surface...
[reaction: see text] Lanthanide triflates were found to promote the palladium-catalyzed cyclization of alkenyl beta-keto esters and amides. In presence catalytic amounts PdCl(2)(MeCN)(2) Ln(OTf)(3), various amides underwent regioselective reactions give six-, seven-, or eight-membered-ring carbocycles in moderate excellent yields.
Copper(I) chloride catalyzed chlorine atom transfer radical cyclization reactions of a series olefinic α-chloro β-keto esters were investigated. It was found that α-dichlorinated suitable substrates; the mono or tandem by CuCl complex with bis(oxazoline) bipyridine proceeded smoothly in dichloroethane at room temperature 80 °C, providing cyclic and bicyclic compounds moderate to high yield.
Water-soluble cobalt porphyrin 1Co and imidazole ligand 2 were synthesized. binds dioxygen in the presence of aqueous solution. The formation oxygen adduct 2-1Co(O2) was studied using UV−vis EPR spectroscopy. impact pH on kinetic stability examined.
3-Hydroxy-4-pyrones are a class of important metal chelators with versatile medicinal applications. An efficient pathway for the preparation new 5-amido-3-hydroxy-4-pyrone derivatives has been developed. The synthesized 5-amido-3-hydroxy-4-pyrones have evaluated as inhibitors matrix metalloproteinases.
ATF2 is a final-focus test beam line which aims to focus the low emittance from ATF damping ring vertical size of about 37 nm and demonstrate nanometer level stability. Several advanced diagnostics feedback tools are used. In December 2008, construction installation were completed commissioning started, supported by an international team Asian, European, U.S. scientists. The present status first results described.
CO2 to methanol conversion is an important process for ecologic and energetic shift, which stimulates the development of active catalysts based on noncritical elements. We have recently reported that Mo atoms anchored rutile titania nanorods exhibit distinctive performance in synthesis, higher activity selectivity than dispersed anatase P25 commercial forms. In this work, deciphering origin rutile, support compared other selected oxides interest, Mo/TiO2 are investigated operando at high...