A5103192463- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Crystal structures of chemical compounds
- Sulfur-Based Synthesis Techniques
- Catalytic C–H Functionalization Methods
- Organometallic Compounds Synthesis and Characterization
- Metal complexes synthesis and properties
- Synthesis and biological activity
- Catalytic Cross-Coupling Reactions
- Phenothiazines and Benzothiazines Synthesis and Activities
- Synthesis of heterocyclic compounds
- Analytical chemistry methods development
- Image Processing Techniques and Applications
- Advanced Vision and Imaging
- Online Learning and Analytics
- Chemical Synthesis and Reactions
- Advanced Image Processing Techniques
- Microwave Engineering and Waveguides
- Educational Technology and Assessment
- Human Pose and Action Recognition
- Intelligent Tutoring Systems and Adaptive Learning
- Anomaly Detection Techniques and Applications
- Analytical Chemistry and Chromatography
- Multicomponent Synthesis of Heterocycles
Hengyang Normal University
2014-2025
Zhejiang Lab
2022-2023
Beijing Jiaotong University
2023
Beijing University of Civil Engineering and Architecture
2023
Shenyang Pharmaceutical University
2021-2022
China Tobacco
2021
Northeastern University
2021
Heilongjiang Institute of Technology
2018-2020
Hunan Normal University
2017-2020
East China University of Science and Technology
2020
The synthesis of anisotropic metal nanostructures is strongly desired for exploring plasmon‐enabled applications. Herein, the preparation Au/SiO 2 and /Pd realized through selective silica coating on Au nanobipyramids. For at ends nanobipyramids, amount coated overall shape exhibit a bell‐shaped dependence cationic surfactant concentration. both end side size component can be varied by changing precursor amount. Silica also selectively deposited corners or facets nanocubes, suggesting...
A novel tandem intermolecular decarboxylative coupling reaction of o-bromobenzoic acids and aryl iodides has been developed. The method affords a range unsymmetrically triphenylenes displays unique regioselectivity broad substrate scope. Mechanistically, palladium/norbornene-catalyzed C–H activation subsequent double reactions were involved. Moreover, the can also be synthesized from 2-iodobiphenyls under norbornene-free conditions.
A novel, atom economic, and environmentally friendly method for the synthesis of 2-substituted benzothiazoles naphtho[2,1-d]thiazoles from N-substituted arylamines elemental sulfur has been developed under metal-free conditions. The reaction underwent process double C-S bond formation through C-H functionalization.
A novel palladium-catalyzed cascade cyclization of alkene-tethered aryl halides with o-bromobenzoic acids is described, which provides an efficient avenue for building various fused hexacyclic scaffolds containing indolo[2,1-a]isoquinoline in moderate to excellent yield. The method enables the construction three C–C bonds through intramolecular carbopalladation, C–H activation, and a decarboxylation sequence. Furthermore, dihydrocyclohepta[de]naphthalene-fused indolo[2,1-a]isoquinolines can...
We describe a three-component reaction of o-iodoanilines with K2S and DMSO that provides 2-unsubstituted benzothiazoles in moderate to good isolated yields functional group tolerance. Electron-rich aromatic amines o-phenylenediamines instead provided benzimidazoles without under similar conditions. Notably, plays three vital roles: carbon source, solvent, oxidant.
The synthesis of perfluoroalkylated fullerenes (PFAFs) holds significant importance due to their enhanced molecular stability, increased lipophilicity, and high electron affinity. Herein, we report a copper-catalyzed multicomponent reaction conducted under aerobic conditions, which enables the production highly soluble PFAFs with half-wave reduction potentials similar those C60. Furthermore, challenges posed by C-F coupling in carbon signal assignment were addressed through...
Abstract Surface‐enhanced infrared absorption (SEIRA) spectroscopy, the enhancement of molecular vibrational signals using resonant metal nanostructures, has recently attracted much attention owing to its potential use in detection chemistry, biology, and medicine. This study reports on growth high‐aspect‐ratio nanocrystals their application for SEIRA. Highly uniform Ag nanorods are synthesized through Au nanobipyramid‐directed overgrowth, nanotubes further prepared galvanic replacement...
Under catalyst-free and additive-free conditions, a novel, convenient, environment-friendly method for the synthesis of benzothiazolethiones from <italic>o</italic>-iodoanilines, K<sub>2</sub>S DMSO has been developed.
QBIC<SUP>TM</SUP> (Query By Image Content) is a set of technologies and associated software that allows user to search, browse, retrieve image, graphic, video data from large on-line collections. This paper discusses current research directions the QBIC project such as indexing for high-dimensional multimedia data, retrieval gray level images, storyboard generation suitable video. It describes aspects including scripting tools, application interfaces, available GUIs, gives examples...
A novel, atom economical, and transition-metal-free strategy for the synthesis of thiophenes from substituted buta-1-enes with potassium sulfide has been presented. The reaction achieves double C–S bond formations via cleavage multiple C–H bonds provides an efficient approach to access various functionalized thiophenes. Moreover, can also be used 1,4-diaryl-1,3-dienes. Mechanistically, DMSO plays a role oxidant S3•– in situ generated K2S is involved.
Abstract Ring opening metathesis polymerization (ROMP) is widely used to prepare functional materials with various topological structures. However, it difficult polymers ultra‐high molecular weight (UHMW) directly. We found a new method UHMW by combining ROMP and acyclic reaction. First, monomer NB‐2OH was polymerized different feed ratio of NB‐2OH/G3, obtained well‐defined P(NB‐2OH) n ( = 50, 200, 463). Then reaction synthesize polymers. The results indicated that polymer z higher M w...
Abstract The first room‐temperature copper‐catalyzed arylations of dimethylamine and methylamine in neat water have been developed. Using a combination CuI 6,7‐dihydroquinolin‐8(5 H )‐one oxime as catalyst, is arylated with various aryl halides to give the corresponding products good excellent yields. Further, this catalysis enables selective arylation afford high yields monoarylated methylamines sole products. magnified image
An efficient molecular iodine-catalyzed three-component cascade reaction for the construction of 2-phenylnaphtho[2,1-d]selenazoles from naphthalen-2-amine, aldehydes, and selenium powder has been developed. The present approach advantages metal-free conditions, simple operation, available raw materials. Moreover, mechanism study proved that underwent a radical process.
Under catalyst- and additive-free conditions, a novel, convenient, environmentally friendly method was developed for the synthesis of 2-substituted benzothiazoles via three-component one pot reaction from aromatic amines, aliphatic elemental sulfur. The achieves double C-S C-N bond formations cleavage two bonds multiple C-H bonds. Furthermore, mechanism research shows that DMSO acts as an oxidant in cyclization reaction.
A pH-induced natural deep eutectic solvent (NADES) combined with vortex-assisted dispersive liquid–liquid extraction technique followed by HPLC was established for the determination of quinolone antibiotics in honey.
An efficient and practical procedure for the synthesis of 2-benzyl- 2-benzylidene-substituted benzo[b]thiazinones from easily available 2-iodophenylcinnamamides potassium sulfide has been developed. In presence DBU, reaction proceeds via electrophilic addition, followed by dehydrogenation reduction to give 2-benzyl benzo[b]thiazinones. Furthermore, 2-benzylidenebenzo[b]thiazinones were obtained in moderate good yields without addition DBU.
Abstract C 17 H 14 N 2 S, Orthorhombic, P 1 (no. 19), a = 5.9687(10) Å, b 8.4626(14) c 28.786(5) V 1454.0(4) Å 3 , Z 4, R gt ( F ) 0.0315, wR ref 0.0824, T 296(2) K.
This paper describes a snapshot of work in progress on the development an efficient file-access method for similarity searching high-dimensional vector spaces. has applications image databases, where images are accessed via feature vectors, as well other areas. The technique is based using collection space-filling curves, auxiliary indexing structure. Initial performance analyses suggest that works efficiently moderately spaces (256 dimensions), with tolerable storage and execution-time overhead.
Three new dialkytin complexes, {[o-OH–C6H4(O)C=N–N=C(CH2Ph)COO](n-Bu2Sn)}n (1), {[o-OH–C6H4(O)C=N–N=C(CH2Ph)COO](MeOH)(p-MeC6H5CH2)2Sn}2 (2), and {[o-OH–C6H4(O)C=N–N=C(CH2Ph)COO](EtOH)(C6H5CH2)2Sn}2 (3), were synthesized by reactions of 2-oxo-3-phenylpropionic acid salicyloylhydrazone with the corresponding diorganotin(IV) complex, respectively. All complexes characterized IR, 1H, 13C, 119Sn NMR spectra, elemental analysis, X-ray single crystal diffraction TGA. For in vitro antitumor...