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Green Synthesis, Characterization, and Biological Studies of 1,3,4-Thiadiazole Derived Schiff Base Complexes
Published in Satish A. Dake, Ravindra S. Shinde, Suresh C. Ameta, A. K. Haghi, Green Chemistry and Sustainable Technology, 2020
Ajay M. Patil, Ravindra S. Shinde, B. R. Sharma, Sunil R. Mirgane
The metal salts copper(II) nitrate trihydrate (Cu(NO3)2.3H2O) (0.241 g, 0.001 mol) and The ligand HL (0.612 g, 0.001 mol) were mixed in 1:2 (metal:- ligand) ratio in a grinder. The reaction mixture was then irradiated by the MW oven by taking 3–5 ml of dry ethanol as a solvent. The reaction was completed in a short time (5–6 min) with higher yields. A colored product obtain washed with ethanol, filtered, and recrystalized with ethanol and ether. Similarly, Zn (NO3)2.6H2O, Cd(NO3)2.4H2O metal complexes was prepared by a similar method (Figure 11.1). The progress of the reaction and purity of the product was monitored by TLC using silica gel G.
Properties of the Elements and Inorganic Compounds
Published in W. M. Haynes, David R. Lide, Thomas J. Bruno, CRC Handbook of Chemistry and Physics, 2016
W. M. Haynes, David R. Lide, Thomas J. Bruno
Copper(II) ferrocyanide Copper(II) ferrous sulfide Copper(I) fluoride Copper(II) fluoride Copper(II) fluoride dihydrate Copper(II) formate Copper(II) formate tetrahydrate Copper(II) gluconate Copper(II) hexafluoro-2,4-pentanedioate Copper(II) hexafluorosilicate tetrahydrate Copper(I) hydride Copper(II) hydroxide Copper(II) iodate Copper(II) iodate monohydrate Copper(I) iodide Copper(I) mercury iodide Copper(II) molybdate Copper(II) nitrate Copper(II) nitrate hexahydrate Copper(II) nitrate trihydrate Copper nitride Copper(II) oleate Copper(II) oxalate Copper(II) oxalate hemihydrate Copper(I) oxide Copper(II) oxide Copper(II) oxychloride hemiheptahydrate Copper(II) 2,4-pentanedioate Copper(II) perchlorate
Synthesis of Zinc, Copper, Cadmium, and Iron Sulfides and Their Sorption Properties
Published in D.S. Sofronov, K.N. Belikov, M. Rucki, S.N. Lavrynenko, Z. Siemiątkowski, E. Yu. Bryleva, O.M. Odnovolova, Synthetic Sorbent Materials Based on Metal Sulphides and Oxides, 2020
D.S. Sofronov, K.N. Belikov, M. Rucki, S.N. Lavrynenko, Z. Siemiątkowski, E. Yu. Bryleva, O.M. Odnovolova
MW-activated synthesis was performed using a MW apparatus MARS (CEM Corporation, Matthews, USA). Volume 50 mL of 0.1 M solution of zinc, cadmium, or copper(II) nitrate, chloride, or sulfate of basicity pH = 8, 10, and 12 was placed in a 250 mL glass. Then the thiourea was added in molar proportion Me2+/Th 1:1, 1:2, or 1:4 with continuous stirring. Next, the mixture was placed in the viala of volume 100 mL and underwent MW activation during 30 minutes at temperature 100°С and 150°С. After the synthesis was finished, the obtained precipitate was filtered out, several times washed with distillated water, and dried at the room temperature during 24 hours.
Effect of optimum process parameters in rotational-magnetorheological poppet valve polishing
Published in Materials and Manufacturing Processes, 2022
The parameters chosen in current work that reduces surface roughness are poppet valve rotation (N, rpm), vertical feed rate of poppet valve (F, mm/min), % volume of CIPs (C), and % volume of SiC abrasives (A). On the basis of the preliminary experimentations done for % ΔRa and available literature related to MR finishing of similar kinds of hard materials, MRP media is formulated by combining CIPs (avg. dia 3 µm), SiC abrasive powder (mesh size 800), glycerol, HNO3, H2O2, and deionized water.[21] Initially, the acid (HF and HNO3) is used as a base medium with distilled water. It was done keeping that workpiece material was hard with hardness (HRC 47). However, it was observed that due to acid, some reaction had taken place between workpiece and acid, because of that some part of the workpiece has been damaged. Therefore, hydrofluoric acid (HF) has been removed, but HNO3 remains, as it is used to brighten the surface, and an extra agent H2O2 is used for dissolving the metallic surface to help abrasive grains. Copper (II) nitrate (CuNO3), which forms due to the reaction of Cu, HNO3, and H2O2, is also used as a polishing agent. So MRP fluid was formulated in the base medium of H2O2, HNO3 and deionized water, with CIPs and abrasive grains. To improve MR fluid viscosity, glycerol is added to the fluid. This functions as a stabilizer to spread CIPs, consistently eliminating agglomeration. It also contributes to sediment prevention. Deionized water is used to prevent corrosion of the MRP fluid in place of the distilled water.