676-83-5Relevant academic research and scientific papers
Methylation of Some Cyclic Triphosphenium Ions
Dillon, Keith B.,Olivey, Richard J.
, p. 150 - 154 (2004)
Six cyclic triphosphenium ions, including examples of five-, six-, and seven-membered ring systems, have been successfully methylated by excess methyl triflate to form the corresponding di-cations. This has been unequivocally established by means of
Methylphosphonium Tin Bromide: A 3D Perovskite Molecular Ferroelectric Semiconductor
Chen, Xiao-Gang,Pan, Qiang,Song, Xian-Jiang,Xiong, Ren-Gen,Zhang, Han-Yue,Zhang, Tie,Zhang, Yi,Zhang, Zhi-Xu
, (2020)
3D ABX3 organic–inorganic halide perovskite (OIHP) semiconductors like [CH3NH3]PbI3 have received great attention because of their various properties for wide applications. However, although a number of low-dimensional lead-based OIHP ferroelectric semiconductors have been documented, obtaining 3D ABX3 OIHP ferroelectric semiconductors is challenging. Herein, an A-site cation [CH3PH3]+ (methylphosphonium, MP) is employed to successfully obtain a lead-free 3D ABX3 OIHP ferroelectric semiconductor MPSnBr3, which shows clear above-room-temperature ferroelectricity and a direct bandgap of 2.62 eV. It is emphasized that MPSnBr3 is a multiaxial molecular ferroelectric with the number of ferroelectric polar axes being as many as 12, which is far more than those of the other OIHP ferroelectric semiconductors and even the classical inorganic perovskite ferroelectric semiconductors BiFeO3 (4 polar axes) and BaTiO3 (3 polar axes). MPSnBr3 is the first MP-based 3D ABX3 OIHP ferroelectric semiconductor. This finding throws light on the exploration of other excellent 3D ABX3 OIHP ferroelectric semiconductors with great application prospects.
Mass spectral study of the CWC-related S-alkyl methylphosphonochloridothioites/S,S′-dialkyl (alkyl′)methylphosphonodithioites under gas chromatography-mass spectrometry conditions
Saeidian, Hamid,Mirkhani, Valiollah,Faraz, Sajjad Mousavi,Sarabadani, Mansour,Naseri, Mohammad Taghi,Ashrafi, Davood,Mirjafary, Zohreh,Babri, Mehran
, p. 13 - 21 (2016)
A class of S-alkyl methylphosphonochloridothioites 3 (11 compounds), S,S′-dialkyl methylphosphonodithioites 4 (12 compounds) and S-alkyl S′-alkyl′ methylphosphonodithioites 5 (9 compounds) were synthesized and were analyzed using gas chromatography-electron ionization mass spectrometer (GC-EIMS). Generalized fragmentation pathways under experimental condition for synthesized compounds are proposed based on analysis of fragment ions of deuterated analogs and density functional theory (DFT) calculations. Results of the study were undertaken with a view to enrich the Organization for the Prohibition of Chemical Weapons (OPCW) Central Analytical Database (OCAD), which may be used for detection and identification of Chemical Weapons Convention (CWC)-related chemicals during on-site inspection and/or off-site analysis, such as OPCW proficiency tests.
Method for synthesizing methyl phosphorus dichloride based on carbon microsphere loaded iron-nickel-cerium catalyst
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Paragraph 0014; 0016-0018; 0020-0022; 0024-0027, (2021/10/16)
The invention discloses a method for synthesizing methyl phosphorus dichloride based on a carbon microsphere loaded iron-nickel-cerium catalyst. The method comprises the following steps: preparing impregnation liquid, preparing the carbon microsphere loaded iron-nickel-cerium catalyst and synthesizing the methyl phosphorus dichloride. According to the synthesis method, a carbon microsphere loaded iron-nickel-cerium catalyst is adopted, the loading amount of three elements of iron, nickel and cerium accounts for 0.2-1% of the total mass of a carbon microsphere carrier, and the molar ratio of iron-nickel-cerium atoms loaded into carbon microspheres is (49-62): (29-48): (3-9). According to the method, the reaction temperature is low, the temperature is 300-400 DEG C, the conversion rate of phosphorus trichloride is 20.4-30.1%, the yield of methyl phosphorus dichloride is 94.6-97.5%, the catalyst is solid, non-toxic and easy to separate from a reaction system, the service life is 2800-3400 hours, and 3.6-6.5 kg of methyl phosphorus dichloride can be produced by per gram of the carbon microsphere loaded iron-nickel-cerium catalyst.
Synthetic method for methylphosphorus dichloride
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Paragraph 0024-0026; 0027-0029; 0030-0032; 0033-0041, (2019/05/15)
The invention relates to a novel synthetic method for glufosinate ammonium intermediate methylphosphorus dichloride. The method is realized by the following technical solution: performing one-step reaction for 3-6 h by using aluminum powder, aluminum trichloride, chloromethane and phosphorus trichloride as raw materials at pressure of 0.3-1.0 MPa to directly obtain a ternary complex with a valencestate of +3, adding sodium chloride, and performing a reaction at 150 DEG C to obtain the methylphosphorus dichloride. According to the synthetic method adopted by the invention, the aluminum powderand the aluminum trichloride are used as the reaction raw materials, the yield can be up to 90% based on an aluminum element, and a utilization ratio of aluminum is improved; and a ternary complex reaction and a ligand reduction reaction are combined, so that the operation process is simplified, a generation amount of solid waste can be significantly reduced, and the production costs are effectively reduced.
Method for preparing dichloro monoalkyl phosphine
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Paragraph 0060-0062, (2017/08/29)
The invention discloses a method for preparing dichloro monoalkyl phosphine. When sodium chloride is used for decomplexing reaction of a binary complex of dichloro monoalkyl aluminum or alkyl aluminum sesquichloride and phosphorus trichloride, alkane solvents are added, the dissociated dichloro monoalkyl phosphine enters the alkane solvents, alkane solution of the dichloro monoalkyl phosphine and newly-generated NaAlCl4 solids are filtered and separated, mixture of the product dichloro monoalkyl phosphine and the alkane solvents can be distilled and separated and can also directly enter a next application process without separation, decomposition of traditional dichloro monoalkyl phosphine in high-temperature distillation is avoided, yield is improved, and waste residues are reduced.
PROCESS FOR PRODUCING METHYLDICHLOROPHOSPHANE
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Paragraph 0062; 0067; 0068, (2017/11/16)
The present invention primarily relates to a process for producing methyldichlorophosphane (MDP) by reaction of methane with PCl3 (phosphorus trichloride) in the presence of a catalytically active amount of a compound of formula SOxCl2, wherein the index x may take the value 1 (SOCl2, thionyl chloride) or 2 (SO2Cl2, sulphuryl chloride). The present invention further relates to particular mixtures that are particularly suitable for producing methyldichlorophosphane (MDP) in the context of the process according to the invention/that are formed when carrying out a process according to the invention.
Green synthesis method of methyl phosphorus dichloride
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Paragraph 0017; 0020; 0021; 0022; 0023; 0024; 0025-0042, (2017/07/22)
The invention discloses a green synthesis method of methyl phosphorus dichloride. The method comprises the following steps: by taking phosphorus pentachloride as a catalyst, heating phosphorus trichloride and phosphorus pentachloride into vapor, and preheating to 150-250 DEG C and mixing with methane and then entering a tubular reactor, and reacting for 0.1-1.0s under the conditions that the temperature is at 400-500 DEG C and the pressure is 0.3-1.2MPa, to obtain methyl phosphorus dichloride. After the catalyst is applied to methane and phosphorus trichloride to synthesize methyl phosphorus dichloride, the conversion rate of the phosphorus trichloride is effectively improved to 40%-50%, and the yield is 90%-95%; the adopted catalyst phosphorus pentachloride is decomposed into phosphorus trichloride and chlorine gas, the catalyst and the product is not required for separation, three wastes are not generated during the whole preparation, and all the materials are recycled, so that the resources are saved, the environment is beneficially protected, and the synthesis method is green.
Synthesis method of glufosinate-ammonium intermediate methylphosphorus dichloride
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Paragraph 0012; 0013, (2017/01/05)
The invention discloses a synthesis method of glufosinate-ammonium intermediate methylphosphorus dichloride, belonging to the technical field of synthesis of a glufosinate-ammonium intermediate. The synthesis method comprises the following steps: by using methyl chloride, aluminum trichloride and phosphorus trichloride as raw materials, carrying out reaction under the pressure of 0.5-3.0 MPa for 6.5-10 hours to obtain a ternary complex, adding aluminum powder and sodium chloride, and carrying out reaction at a certain temperature to obtain the methylphosphorus dichloride. According to the method, the phosphorus trichloride is simultaneously used as the reactant and solvent; and the reaction pressure is enhanced, so that the methyl chloride gas sufficiently reacts with the solid and liquid phases without adding any other solvent, thereby enhancing the product purity, avoiding the problems of solvent separation, recovery and the like, reducing the phosphorus trichloride recovery difficulty, and greatly lowering the production cost.
Synthesis and Herbicidal Activities of Sodium Methyl(α-(Substituted Phenoxyacetoxy)Alkyl)Phosphinates
Wang, Tao,Gao, Yujiao,Peng, Hao,He, Hongwu
, p. 972 - 977 (2015/08/04)
A series of sodium methyl(α-(substituted phenoxyacetoxy)alkyl)phosphinates was designed and synthesized. Their structures were confirmed by IR, 1H NMR and elemental analysis, and some of them were further confirmed by MS. The results of bioassay showed that most of title compounds exhibited moderate to good herbicidal activities against the root of barnyard grass and rape at 10～100 mg/L.
