A5101640747- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Solid State Laser Technologies
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Radiation Detection and Scintillator Technologies
- Multicomponent Synthesis of Heterocycles
- Perovskite Materials and Applications
- Microwave Dielectric Ceramics Synthesis
- Chemical Synthesis and Reactions
- Synthetic Organic Chemistry Methods
- Asymmetric Synthesis and Catalysis
- Synthesis and Characterization of Pyrroles
- Advanced materials and composites
- Synthesis of heterocyclic compounds
- Porphyrin and Phthalocyanine Chemistry
- Luminescence and Fluorescent Materials
- Fusion materials and technologies
- Microwave-Assisted Synthesis and Applications
- Advanced Condensed Matter Physics
- Cloud Data Security Solutions
- Pharmacological Effects of Natural Compounds
- Blockchain Technology Applications and Security
- Crystallography and molecular interactions
- Urban Heat Island Mitigation
Nanjing University
2001-2023
Xiangtan University
2006-2021
Sichuan University
2010-2019
Syracuse University
2017
Wenzhou University
2008-2010
Institute of Modern Physics
2006
Universiti Sains Malaysia
2001
A series of 2-substituted benzothiazoles have been synthesized by the condensation 2-aminothiophenol with aldehydes (RCHO: R = Alkyl, Aryl, Heteroaryl, 2-Arylformyl) in presence a catalytic amount cetyltrimethyl ammonium bromide (CTAB) "on water" one-pot procedure without additional organic solvents and oxidants. Thereinto, 2-alkylbenzothiazoles were high yields 2-arylformylbenzothiazoles obtained from arylformyl for first time using present protocol.
A variety of N-substituted pyrroles have been synthesized by reacting γ-diketones (R¹C(O)CH2CH2C(O)R²: R¹, R² = Me, Ph) with amines (RNH2: R=Alkyl, Aryl, TsNH) or diamines (1,6-diaminohexane and 1,2-diaminoethane) in the presence indium tribromide, trichloride trifluoromethanesulfonate at room temperature under solvent-free conditions. The experiment protocol features simple operations, products are isolated high to excellent yields (81-98%).
A new type of three-component reaction air-stable isochromenylium tetrafluoroborates with electron-rich stilbenes in acetonitrile has been developed under catalyst-free conditions this work. This cascade multibond-formation is initiated by an intermolecular oxa [4 + 2]-cycloaddition, relayed a nucleophilic addition acetonitrile, and terminated intramolecular Friedel–Crafts reaction, affording the corresponding benzo[c]phenanthridine analogues one step.
Abstract Metal triflates have been used to catalyze synthesis of β-enamino ketones or pyrroles from amines and 1,3-dicarbonyl 1,4-dicarbonyl compounds under solvent-free conditions, respectively. Among different metal screened, 0.5 mol% Ga(OTf)3 efficiently promoted the reactions give excellent yields. In addition, catalyst could be recovered easily after reused without evident loss in activity.
Visible IR-to-green photon-avalanche upconversion is reported in an Ho3+ singly doped β−Na(Y1.5Na0.5)F6 crystal under 980 nm excitation. Upconverted green, red, and IR emissions are observed at 540, 645, 751 nm, respectively. Temporal evolution excitation power dependent intensity measured, suggesting that a mechanism responsible for the process. It believed efficient cross relaxation (5S2,5I8)→(5I6,5I6) mainly performs population of 5I6 excited state, resulting intense emission synthesized samples.
The objectives of this study were (1) to investigate the effect extracts from some plants in families Nelumbonaceae and Nymphaeaceae on phosphodiesterase 5 (PDE5) arginase, which have been used erectile dysfunction treatment, (2) isolate identify compounds responsible for such activities. characterization quantitative analysis flavonoid constituents active performed by HPLC. Thirty-seven ethanolic different parts genus Nymphaea Victoria Nelumbo screened PDE5 arginase inhibitory receptacles...
Eu 3 + doped and Yb3+/Ho3+ codoped LuF3 YF3 nanoparticles with a size distribution of 200–300 nm have been prepared by adopting combustion-fluorization method. The luminescence spectra Eu3+ Ho3+ ions in the investigated through comparison. It is found that two hosts show different properties although sites occupied rare earth (RE) are same symmetry. may be ascribed to difference RE-F bond nature hosts.
W-K-TiC alloys with different titanium carbide concentrations (0.05, 0.1, 0.25, 0.5, 1, 2) wt.% were fabricated through Mechanical Alloying and Spark Plasma Sintering. The effects of the addition nano-scaled TiC particles on relative density, Vickers micro-hardness, microstructure, crystal information, thermal shock resistance, tensile strength investigated. It is revealed that doped nano-particles located at grain boundaries. density micro-hardness was enhanced highest 731.55. As increased...
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTPhotooxygenation of Indolizines via Selective Excitation Their Charge Transfer Complexes with Molecular OxygenJing-Zhi Tian, Zhao-Guo Zhang, Xiao-Liang Yang, Hoong-Kun Fun, and Jian-Hua XuView Author Information Department Chemistry, Nanjing University, 210093, China, Institute Organic Academia Sinica, Shanghai, 200032, X-ray Crystallography Unit, School Physics, Universiti Sains Malaysia, 11800, USM, Penang, Malaysia [email protected]Cite this: J....
Size-dependent upconversion properties for Er 3+ -doped Y 2 O 3 nano-crystal have been investigated. The investigation shows that the reduction of particle size intensifies hypersensitive H 11/2 → 4 I 15/2 transition, decreasing intensity ratio S 3/2 transition to one. enhanced non-radiative decay probability and intensified energy transfers in small particles also enhance population F 9/2 level, leading increase red green It is believed absorbed hydroxyl carbonate groups on surface as well...