20 results about "Trimethylsilyl" patented technology

The application belongs to the field of organic synthesis, and discloses a method for preparing chiral 2-(1,3-diarylallyl)malonate by using a Pd / phosphine oxygen bidentate phosphine phenol ligand catalysis, which comprises the following steps: under a protective atmosphere, mixing P, O-bidentate phosphine phenol ligand, a palladium catalyst, N, O-bis(trimethylsilyl)acetamide, a malonate nucleophilic reagent and an allyl acetate electrophilic reagent in dichloromethane, and reacting to obtain chiral 2-(1,3-diarylallyl)malonate product. The system has the advantages of high enantioselectivity, high catalytic efficiency, wide substrate application range and mild conditions.

An electrolyte, a battery cell, and a vehicle with a vehicle battery is provided. The electrolyte includes a ternary salt, dual-cyclic solvents, a linear carbonate solvent, and quaternary additives. The ternary salt includes lithium hexafluorophosphate (LiPF6), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium difluoro(oxalate)borate (LiDFOB). The dual-cyclic solvents include ethylene carbonate (EC) between 0-30% by volume and fluoroethylene carbonate (FEC) between 0-30% by volume. The linear carbonate solvent includes at least one of ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), or diethyl carbonate (DEC). The linear carbonate solvent is between 60-80% by volume. The quaternary additives include vinylene carbonate (VC) between 0.5-2% by weight, trimethylsilyl (TMSi) between 0.25-1% by weight, bis(2,2,2-trifluoroethyl) carbonate (DFDEC) between 0.5-2% by weight, and succinic anhydride (SA) between 0.25-1% by weight.

The application belongs to the technical field of compound preparation, and particularly relates to a preparation method of an alkali metal salt of an oxalate chelate structure, at least comprising the following steps: mixing tris(trimethylsilyl) phosphate, an oxalate and a phosphorus-containing or boron-containing fluorine compound in a first organic solvent, stirring and heating to obtain lithium phosphate, trimethyl fluorosilane gas, and difluorobisoxalate phosphate or difluorooxalate borate, filtering the reaction solution to obtain lithium phosphate solid and a difluorobisoxalate phosphate solution or a difluorooxalate borate solution; adding a second organic solvent for recrystallization after concentration; and obtaining difluorobisoxalate phosphate or difluorooxalate borate solid after filtration, and drying the solid under reduced pressure to obtain a finished product. The process is simple, and the cost is low. By-products lithium phosphate, potassium fluoride and hexamethyldisiloxane can be directly sold as products after purification. Therefore, the application has an atomic utilization rate close to 100%, no invalid waste, less three-waste emissions, and is friendly to the environment.

The application relates to the technical field of organic synthesis, and provides N,O-bis(trimethylsilyl)acetamide and a preparation method thereof, the preparation method comprising the following steps: S100, pretreating raw materials and solvents; after the pretreatment is completed, the raw materials and the solvents are added into a reactor to react, so that a reactant is obtained; S200, sequentially performing separation treatment and rectification treatment on the reactant, so that N,O-bis(trimethylsilyl)acetamide is obtained; wherein the raw materials comprise trimethylchlorosilane and acetyl chloride. The application adopts trimethylchlorosilane and acetyl chloride as raw materials to prepare N,O-bis(trimethylsilyl)acetamide, the raw materials are easy to purchase and low in cost, the reaction condition is mild and easy to control, the obtained byproduct ammonium chloride can be used as a chemical fertilizer raw material, there is no environmental protection problem, the synthesis process is simple, no special equipment is needed, and large-scale industrialization can be easily realized.

The present disclosure relates to a method of manufacturing an organoboron salt, wherein the method comprises reacting an ionic boron-oxygen compound with a base and a (di)carboxylic acid, or a trimethylsilyl-protected derivative thereof, thereby forming the organoboron salt. The present disclosure also relates to a method of processing the organoboron salt.

The application discloses a silicon-containing lithium salt-based electrolyte, a preparation method and application thereof, and relates to the technical field of lithium batteries. The electrolyte comprises a lithium salt, an additive and a solvent, wherein the additive is lithium trimethylsilyl acetate. The lithium trimethylsilyl acetate is introduced into a conventional electrolyte as an additive, the flowability of the electrolyte at low temperature is increased, and the low-temperature performance of the conventional electrolyte is effectively improved.

This invention relates to the field of synthetic chemistry, and discloses a carborane amino acid derivative, its preparation method, and its applications. The structural formula of the carborane amino acid derivative is shown below: ; where is C, is BH; o, m, and p are each independently selected from C, R, and C, respectively. 3 Or BH; and when o is selected from CR 3 When m and p are selected from BH; when m is selected from CR 3 When o and p are selected from BH; when p is selected from CR 3 At that time, o and m were selected from BH; R 1 R 2 and R 3 Each of the following groups is independently derived from one or more of H, OH, SH, NH2, halogen, trimethylsilyl, substituted or unsubstituted alkyl groups of 1-15 carbon atoms, substituted or unsubstituted benzyl, substituted or unsubstituted aryl groups of 6-20 carbon atoms, boric acid, and borate ester groups. This invention provides an efficient and practical synthetic route to overcome the bottleneck in the preparation of carborane amino acid compounds, yielding novel boron carrier candidates with significantly superior performance compared to existing clinical drugs.

This invention provides a method for preparing tris(methylcyclopentadienyl)yttrium. This method can efficiently remove key impurities, simplifying the process while effectively improving the purity and yield of tris(methylcyclopentadienyl)yttrium. The preparation method includes the following steps: S1, under an inert atmosphere, methylcyclopentadiene and a bis(trimethylsilyl)amino potassium salt solution are mixed at a temperature ≤30°C, and then the temperature is raised to 75-85°C for reaction; after the reaction, the mixture is filtered under reduced pressure to obtain a cyclopentadienyl potassium salt intermediate; S2, under an inert atmosphere, yttrium trichloride and the cyclopentadienyl potassium salt intermediate are mixed in the presence of a solvent, and then the temperature is raised for reaction; after the reaction, the mixture is filtered, the filtrate is collected, and the filtrate is concentrated under reduced pressure to obtain a crude product; S3, the crude product is pretreated by reduced pressure distillation to obtain a pretreated product; then, it is sublimated under vacuum to obtain the tris(methylcyclopentadienyl)yttrium.

The application relates to an electrolyte, a lithium ion battery and application thereof. The electrolyte comprises a first additive, a second additive and a third additive, the first additive comprises vinylene carbonate, the second additive comprises 3-(trimethylsilyl)-2-oxazolidinone, and the third additive comprises 1,3,5-triacryloylhexahydro-1,3,5-triazine; the mass percentage of the vinylene carbonate is 1-15% in the total mass of the electrolyte, the mass percentage of the 3-(trimethylsilyl)-2-oxazolidinone is 0.5-5%, and the mass percentage of the 1,3,5-triacryloylhexahydro-1,3,5-triazine is 0.5-2.5%. In the scheme, the three functional additives synergistically act, can effectively inhibit the catalytic side reaction caused by the dissolution of manganese ions, effectively buffer the volume expansion of the silicon negative electrode, and improve the high and low temperature cycle stability of the lithium ion battery.

This invention discloses a method for synthesizing tris(trimethylsilyl)phosphate, comprising mixing trimethylsilylacetic acid, phosphate, phase transfer catalyst, and organic solvent, and reacting them under a flowing inert gas atmosphere; after the reaction, filtering is performed, and the filtrate is distilled to obtain tris(trimethylsilyl)phosphate. This method uses phosphate and trimethylsilylacetic acid as raw materials to prepare tris(trimethylsilyl)phosphate, with low reaction temperature, high product yield and purity, and low production cost, making it suitable for industrial application.

This invention provides a comprehensive method for preparing vinyl sulfate and the vinyl sulfate obtained therefrom. The method includes: mixing bis(trimethylsilyl)sulfate, alkyl diol, a metal halide catalyst, and a first solvent; performing a first reaction to obtain catalyst residue, trimethylsilanol, and vinyl sulfate; and then reacting the catalyst residue with trimethylsilanol to recover hexamethyldisiloxane, which is used as a raw material for preparing bis(trimethylsilyl)sulfate. This comprehensive method provides vinyl sulfate, and the catalyst can be used in two ways, generating the byproduct hexamethyldisiloxane, which can be recycled and used as a raw material to react with sulfuric acid to prepare bis(trimethylsilyl)sulfate. This achieves material recycling, significantly reduces economic costs, greatly improves atom economy and the greenness of the process, and has certain feasibility in industrial production.

An electrolyte, a battery cell, and a vehicle with a vehicle battery are provided. The electrolyte comprises a ternary salt, dual-cycle solvents, a linear carbonate solvent, and quaternary additives. The ternary salt comprises lithium hexafluorophosphate (LiPF6), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium difluoro(oxalate)borate (LiDFOB). The dual-cycle solvents comprise ethylene carbonate (EC) and fluoroethylene carbonate (FEC) at 0–30 vol%. The linear carbonate solvent comprises at least one of ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), or diethyl carbonate (DEC) at 60–80 vol%. The quaternary additives include vinylene carbonate (VC) between 0.5-2 wt.%, trimethylsilyl (TMSi) between 0.25-1 wt.%, bis(2,2,2-trifluoroethyl) carbonate (DFDEC) between 0.5-2 wt.% and succinic anhydride (SA) between 0.25-1 wt.%.

The application discloses a kind of cyclobutene compounds and its preparation method and application.The structural formula of cyclobutene compound of the application is as follows: in the formula, R 1 Selected from cyano, or, R 2 Selected from hydrogen, fluorine, chlorine, bromine, C1~C4 alkyl, C1~C4 alkoxy, phenoxy, phenyl, C4~C6 heteroaryl or methylthio, R 3 Selected from hydrogen, C1~C4 alkyl, phenyl or trimethylsilyl group.The structural novelty of cyclobutene compound of the application has significant biological pharmacological activity, is suitable for being used for drug synthesis, and its preparation method has the advantages of raw material easy to obtain, wide substrate applicability, high atom economy, high regioselectivity, high chemical selectivity, high diastereoselectivity, high step economy, mild reaction condition, simple post-treatment operation, etc., is suitable for large-scale industrial production and application.

This application provides a battery cell, a battery device, an electrical device, and an energy storage device. The battery cell includes an electrode assembly and an electrolyte; the positive electrode active material includes lithium-containing transition metal oxide particles and lithium-containing transition metal phosphate particles; the lithium-containing transition metal oxide particles include nickel, cobalt, and X1 elements, where X1 elements include manganese and / or aluminum; the lithium-containing transition metal phosphate particles include manganese and iron; based on the total molar number of manganese and iron in the lithium-containing transition metal phosphate particles, the molar percentage of manganese is 40%-75%; in the cross-section of the positive electrode active material layer along the thickness direction of the electrode sheet, the Dn50 of the lithium-containing transition metal phosphate particles is 100nm-300nm, and the Dn90 of the lithium-containing transition metal phosphate particles is 250nm-500nm; the electrolyte includes a first component, which includes one or more of lithium difluorophosphate, lithium difluorooxalate borate, tris(trimethylsilyl)phosphate, and lithium bis(oxalate borate).

The application discloses a perovskite solar cell based on trimethylsilyl methanesulfonate modification and a preparation method thereof. The cell comprises an anode substrate, an electron transport layer, a buried bottom interface modification layer, a perovskite light absorption layer, a top interface modification layer, a hole transport layer and a cathode layer. The electron transport layer is SnO2 modified by ammonium tartrate (AT) and nitric acid (HNO3), and the perovskite light absorption layer is CsPbI2Br. Trimethylsilyl methanesulfonate (TMSEs) is used as the buried bottom interface modification layer to modify the interface between the SnO2 electron transport layer and the CsPbI2Br perovskite light absorption layer, to construct a molecular bridge on the interface, to passivate the defects of the SnO2 / CsPbI2Br interface, to inhibit the non-radiative recombination of the interface, and to improve the room-temperature black-phase stability of the CsPbI2Br perovskite film, thereby improving the performance of the perovskite solar cell device. The method has low cost, is simple and easy to operate, is suitable for the preparation of large-scale perovskite solar cells, and has important research and application values.

This invention proposes a novel dopant for ion mobility spectrometry, belonging to the field of emergency rescue and detection. The novel dopant for ion mobility spectrometry comprises tris(trimethylsilyl)silane and polyphenyl-methylsiloxane, with a mass ratio of tris(trimethylsilyl)silane to polyphenyl-methylsiloxane of 1:(1-9), preferably 3:7 to 1:1. The tris(trimethylsilyl)silane and polyphenyl-methylsiloxane are thoroughly mixed and injected into a dopant container, which is heated to a temperature of 20-80°C. This novel dopant dissolves small organic molecules in flame-retardant polyphenyl-methylsiloxane, significantly improving the safety of the dopant, reducing safety hazards at fire scenes, and greatly reducing the volatility of the dopant. It eliminates the need for frequent dopant replenishment, reducing environmental pollution and lowering consumable costs.

This invention belongs to the field of molecular synthesis and materials technology, and discloses a method for preparing small molecule materials based on benzothiophene-benzodithiophene (DBDTT) and benzoselenophene-benzodiselenophene, as well as their applications. The method includes: using 1-chloro-2-iodobenzene or 1-chloro-2-bromobenzene and trimethylethynylsilane as raw materials, after a stalk coupling reaction, removing the TMS (trimethylsilyl group) with potassium hydrofluoric acid to obtain a key intermediate; using S8 or Se as a sulfur source or selenium source, and potassium carbonate as a base, a series of fused-ring thiophene / selenophene small molecule materials are synthesized through a cascade cyclization reaction. The substrates of this invention are simple to synthesize, the raw materials are inexpensive and readily available; no metals are involved; the reaction can be carried out under air conditions; the reaction efficiency is high, with three rings fused simultaneously in a single step; the yield is moderate, and even at a large scale (10 mmol), the yield can still reach 58%. Therefore, this method is suitable for industrial production.

The application relates to the field of high polymer materials, and particularly provides a silicon nitride ceramic precursor and a preparation method thereof. The preparation method comprises the following steps: S100, carrying out an ammonolysis reaction on trimethylsilyl-substituted amine halosilane, adding an acid-binding agent, and obtaining an oligomeric silazane; and S200, carrying out a heating treatment on the oligomeric silazane under an inert atmosphere, and obtaining the silicon nitride ceramic precursor. The trimethylsilyl-substituted amine halosilane is introduced into a liquid ammonia system, and the ammonolysis is carried out in cooperation with the acid-binding agent, the standing and separation and the cross-linking and solidification, so that the treatment process of by-products such as ammonium halide can be obviously simplified, and the chemical purity and the ceramic yield of the silicon nitride ceramic precursor and pyrolysis products can be improved.