A novel and general copper/silver catalytic system has been developed for the Conia-ene intramolecular reaction of linear β-alkynic β-ketoesters. In the presence of (CuOTf)2·C6H6 and AgSbF6 (or AgOAc), a variety of the linear β-alkynic β-ketoesters selectively underwent the Conia-ene...
Silver triflate and copper(I) iodide cocatalyzed direct alkynylation and cyclization reaction of in situ formed N-iminoisoquinolinium ylides with bromoalky... P Huang,Q Yang,Z Chen - 《Journal of Organic Chemistry》 被引量: 7发表: 2012年 ...
Based on the standard Gibbs free energy of formation of silver oxide (Ag2O)10: as given by the reaction: °GfAg2O = −28523 + 61.7 × T, (1) 1Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 70101, Taiwan. 2Center for Micro/Nano Science and ...
Isolation: silver is readily available commercially so it is not normally necessary to prepare silver in the laboratory. However the formation of silver metal may be demonstrated in a satisfying reaction in which copper metal is dipped into a solution of silver nitrate, AgNO3....
Optimization of reaction parameters In order to obtain AgNPs of fine size and shape, optimization of the main reaction parameters was performed with contact time (5–45 min), silver salt precursor concentration (0.1–0.5%) and chitosan-algae extract proportion (4:1, 3:2, 2.5:2.5, 2:3, 1...
Human systemic effects by inhalation: skin effects. Inhalation of dusts can cause argyrosis. Questionable carcinogen with experimental tumorigenic data. Flammable in the form of dust when exposed to flame or by chemical reaction with C2H2, NH3, bromoazide, ClF3 ethyleneimine, H2O2, oxalic acid, H2...
Applying a model for mass transfer in the tube, values of pollutant deposition velocity at the surface and of reaction probability γ as a function of concentration, mixture composition, flow rate, reactor length, and exposure time were obtained. In dry air, H 2S reacts with Ag at a ...
Define silver-blue. silver-blue synonyms, silver-blue pronunciation, silver-blue translation, English dictionary definition of silver-blue. Adj. 1. silver-blue - of something having a color that is a light shiny blue silvery-blue chromatic - being or hav
The thickness of alumina was controlled by varying the number of reaction cycles. Thermal Annealing The as-prepared, uncoated and Al2O3-coated Ag nanorods were annealed in a quartz tube furnace at 200, 300 and 400 °C for 30 minutes in air. Characterization of Al2O3-coated Ag ...
Fig. 8. Relative CO consumption rate (with respect to the rate at 300 °C) during the temperature-programmed reaction over 0AgCo (blue) and 0.3AgCo (red) in a dilute CO flow (pCO = 10 mbar, 50 mL min-1 in total, balanced by Ar). 3.4. Influence of silver on catalyt...