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Advanced manufacturing and high-quality materials
Published in Natalia Yakovleva, Edmund Nickless, Routledge Handbook of the Extractive Industries and Sustainable Development, 2022
Kazuyo Matsubae, Eiji Yamasue, Hisao Ohtake
The elemental phosphorus produced by the process explained above is used as a starting material for the manufacture of various final products. For instance, elemental phosphorus is oxidized to produce thermal phosphoric acid which is used for the manufacture of high-quality phosphate salts and phosphate esters. Elemental phosphorus is also reacted with chlorine to form phosphorus chlorides, such as phosphorus trichloride, phosphorus pentachloride, and phosphorus oxychloride. Further, the allotropic modification of elemental phosphorus produces red phosphorus. These products are used as food additives, in the production of flame retardants, as plasticizers, as electrolytes for lithium secondary batteries, and as agents for plating, etching, and surface treatments.
One-pot synthesis of magnetic iron phosphide nanoparticles
Published in Inorganic and Nano-Metal Chemistry, 2020
Deepali Ahluwalia, Atul Varshney, Sachin Kumar, Anil Kumar, Sudhir Gopalrao Warkar, Narendra Singh, Prashant Dubey
Sodium phosphide (Na3P) synthesis was first reported by Alexandre Baudrimont in mid-19th century using phosphorus pentachloride (PCl5) as the phosphorus source.[33] Subsequently, various methods were reported based on the use of sodium metal and red or yellow phosphorus as the phosphorus source to yield Na3P [15] to generate FeP. The very tedious method for the synthesis of Na3P was reported by DiSalvo and coworkers by using sodium azide (NaN3), titanium nitride (TiN), and Phosphorus with potassium iodide, halide flux under argon atmosphere at very high temperature in niobium (Nb) sealed tube and found single crystals of Na3P as red-block.[33] Toxicity of the chemicals used rendered these approaches difficult and challenging. The synthesis of Na3P is also very challenging due to toxicity of TOP that may arise by the formation of phosphine gas as a by-product during the reaction in solution.
Studying the effect of particle size on the antibacterial activity of some N-nicotinyl phosphoric triamides
Published in Particulate Science and Technology, 2019
Nasrin Oroujzadeh, Elham Delpazir, Zahra Shariatinia
From the reaction of Phosphorus pentachloride with Nicotinamide (C5H4NC(O)NH2) in a 1:1 molar ratio and one oxidation step, N-nicotinyl phosphoramidic dichloride with the formula C5H4NC(O)NC(O)NHP(O)Cl2 (A) was prepared. To a mixture of precipitate (1 mmol) in acetonitrile (30 ml) at 0°C, the corresponding amine (4 mmol) was added drop wise and the mixture stirred for 8 h. Then the solvent evaporated at room temperature, the residue washed with distilled water and dried at ambient temperature (Gholivand and Oroujzadeh 2008).
Synthesis of new mesomorphic terphenyl derivatives: the influence of terphenylene and functional fragments on the mesomorphic properties and ligand exchange on quantum dots
Published in Liquid Crystals, 2021
V. S. Bezborodov, A. V. Finko, S. G. Mikhalyonok, Y. I. Derikov, G. А. Shandryuk, N. M. Kuz’menok, A. S. Arol, O. N. Karpov, R. V. Talroze
The following aromatisation of the condensation product (1) under the action of phosphorus pentachloride, dealkylation of chloroarenes (2) in boiling acetic acid in the presence of iodide, reaction of hydroxy derivatives (3) with ethyl ester of 6-bromohexanoic acid in the presence of base gave ethyl 6-((4ʹʹ-((1r, 4s)-4-butylcyclohexyl)-2ʹ-chloro-[1,1ʹ:4ʹ,1ʹʹ-terphenyl]-4-yl)-oxy)hexanoate (4), which by alkaline hydrolysis in the presence of lithium hydroxide in aqueous tetrahydrofuran was converted to the corresponding acid (8) (see Scheme 2).