A5071822958- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Chemical Synthesis and Reactions
- Analytical Chemistry and Chromatography
- Graphene research and applications
- Click Chemistry and Applications
- Inorganic and Organometallic Chemistry
- Advanced Polymer Synthesis and Characterization
- Synthesis of Indole Derivatives
- Dendrimers and Hyperbranched Polymers
- Asymmetric Synthesis and Catalysis
- Interconnection Networks and Systems
- Chemical Synthesis and Analysis
- Graph Theory and Algorithms
- Material Properties and Processing
- Forensic Fingerprint Detection Methods
- Oxidative Organic Chemistry Reactions
- Fullerene Chemistry and Applications
- Cyclopropane Reaction Mechanisms
- Chromatography in Natural Products
- Organic Electronics and Photovoltaics
- Catalytic C–H Functionalization Methods
- Chemical Reaction Mechanisms
- RNA Interference and Gene Delivery
- Industrial Vision Systems and Defect Detection
Case Western Reserve University
2022-2025
Lomonosov Moscow State University
2014-2019
Moscow State University
2017
King Abdullah University of Science and Technology
2016
Czech Academy of Sciences, Institute of Analytical Chemistry
2009
γ-Graphyne is the most symmetric sp2/sp1 allotrope of carbon, which can be viewed as graphene uniformly expanded through insertion two-carbon acetylenic units between all aromatic rings. To date, synthesis bulk γ-graphyne has remained a challenge. We here report multilayer crystallization-assisted irreversible cross-coupling polymerization. A comprehensive characterization this new carbon phase described, including synchrotron powder X-ray diffraction, electron lateral force microscopy,...
The highest sheet symmetry form of graphyne, with one triple bond between each neighboring hexagon in graphene, irreversibly transforms exothermically at ambient pressure and low temperatures into a nongraphitic, planar-sheet, zero-bandgap phase consisting intrasheet-bonded sp2 carbons. synthesis this carbon is demonstrated, other phases are described for possible future from graphyne without breaking bonds. While measurements theory indicate that the reacting becomes nonplanar because...
We have successfully achieved selective and efficient functionalization of sheet edges in microcrystalline multilayer γ-graphyne through two methods: cross-coupling with residual bromide edge groups copper-catalyzed azide-alkyne cycloaddition (CuAAC) terminal alkyne groups. This modification significantly enhances the ease mechanical exfoliation dispersibility sheets γ-graphyne. Specifically, C
A novel stereocontrolled assembly of spiro[oxindole-3,2′-pyrrolidines] via [3+2]-cycloaddition donor–acceptor cyclopropanes to electron-poor ketimines, iminooxindoles, was developed. The method allows for efficient employment common readily available cyclopropanes, functionalized with ester, keto, nitro, cyano etc. groups, and N-unprotected iminooxindoles. stereospecificity the initial SN2-like imine attack on a cyclopropane molecule together high diastereoselectivity further C–C bond...
Asymmetric Friedel–Crafts reactions of indoles or pyrroles with coumarin-3-carboxylates catalyzed by Cu(OTf)2 complexes chiral bis(oxazoline) ligands have been developed. The highest ee (up to 82%) was achieved for indole a nitro derivative coumarin-3-carboxylate.
A unique organocatalytic system for Mukaiyama-type aldol reactions based on the cooperative action of nitro compounds and thioureas has been identified.
We have successfully achieved selective and efficient functionalization of sheet edges in microcrystalline multilayer γ-graphyne through two methods: cross-coupling with residual bromide edge groups, copper-catalyzed azide-alkyne cycloaddition (CuAAC) terminal alkyne groups. This modification significantly enhances the ease mechanical exfoliation dispersibility sheets γ-graphyne. Specifically, C18-grafted forms stable dispersions compatible organic solvents, allowing for imaging atomically...
A recent article by Ryu, Lee and coworkers claims synthesis of "holey graphyne," a strained sp2/sp1 carbon lattice featuring repeating dibenzo-1,5-cyclooctadiene-3,7-diyne motif. Here, we describe the replication key experiments from this Article. We did not observe formation graphyne" under reported conditions. Furthermore, show that claimed copper-mediated cross-coupling chemistry fails even for undemanding model substrates.
A rapid approach to identifying complementary catalytic groups using combinations of functional polymers is presented. Amphiphilic with "clickable" hydrophobic blocks were used create a library polymers, each bearing single functionality. The combined in water, yielding mixed micelles. As the colocalized microphase, they could act cooperatively, giving rise new modes catalysis. multipolymer "clumps" screened for activity, both presence and absence metal ions. number catalyst candidates...
Several recent articles by Cui and coworkers claim syntheses of γ-graphyne, a novel sp2/sp1 allotrope carbon, directly from calcium carbide. Here, we describe the replication key experiments this series articles. We did not observe formation γ-graphyne under reported conditions. The characterization data our replications are partially consistent with results Cui. However, show that claimed produce only heavily contaminated, amorphous chars no detectable sp1 carbons.
Abstract involving a nitro group‐mediated silyl cation transfer
A recent article by Ryu, Lee and coworkers claims synthesis of "holey graphyne," a strained sp2/sp1 carbon lattice featuring repeating dibenzo-1,5-cyclooctadiene-3,7-diyne motif. Here, we describe the replication key experiments from this Article. We did not observe formation graphyne" under reported conditions. Furthermore, show that claimed copper-mediated cross-coupling chemistry fails even for undemanding model substrates.