14 results about "Deuterated chloroform" patented technology

The xylylene diisocyanate composition contains a xylylene diisocyanate and a specific compound. When the xylylene diisocyanate composition is mixed with deuterated chloroform and the mixture is subjected to 1H-NMR measurement, the specific compound has a peak in a chemical shift value range of 2.44 ppm to 2.46 ppm based on chloroform in the deuterated chloroform.

The invention relates to the field of catalysts, aims to solve the problems of low yield and low deuteration degree of existing catalysts, and provides a preparation method of a composite catalyst for preparing deuterated chloroform, and the preparation method comprises the following steps: S100, taking a molecular sieve-alumina-zinc oxide catalyst, dropwise adding a carbazole ethanol solution into the molecular sieve-alumina-zinc oxide catalyst, then dropwise adding N, N-dimethyl formamide, and carrying out a reaction for 2-4 hours; dissolving with an N, N-dimethylformamide solution to obtain a pre-reaction solution; s200, heating, crystallizing, filtering and drying the pre-reaction solution to obtain a dried product; and S300, obtaining the composite catalyst from the dried product under the induction of an electric field and a magnetic field. According to the invention, the selectivity and conversion efficiency of the molecular sieve, aluminum oxide and zinc oxide as catalysts are utilized, and the carbazole ethanol solution is combined, so that hydroxyl in carbazole ethanol can be partially condensed with residual oxyhydrogen bonds in the molecular sieve, aluminum oxide and zinc oxide except hydrogen bonds at a relatively high temperature to form firm chemical bonds; therefore, the deuteration degree, the purity and the yield of the deuterated chloroform are improved.

The present invention belongs to the field of polymer characterization technology, and specifically relates to a method for analyzing the components of polyamide or its copolymers. Polyamide (nylon) and its copolymers are difficult to dissolve in conventional deuterated reagents, and therefore conventional polymer characterization and identification cannot be performed. The present invention uses a mixed solvent of a special solvent, deuterated phenol, and a deuterated chloroform reagent to dissolve polyamide and its copolymer samples, and performs related quantitative nuclear magnetic resonance hydrogen spectrum characterization to analyze the molecular weight of the polyamide or its copolymer samples and the content of the comonomer in the polyamide copolymer, thereby achieving accurate quantification of the polyamide or its copolymer.

A polyether nitrile represented by formula (I) in which, in a proton NMR measurement using a mixed solvent in which the volume ratio of pentafluorophenol to deuterated chloroform is 5: 4, "the integrated value of peak A (peak having a peak top at 7.10-7.20 ppm) / the integrated value of peak B (peak having a peak top at 7.55-7.68 ppm)" is 0.050 or less. Provided is a polyether nitrile having high thermal stability.

A valve regulated lead-acid battery includes at least one cell including an element and an electrolyte solution. The element includes a negative electrode plate, a positive electrode plate, and a separator interposed between the negative electrode plate and the positive electrode plate. The negative electrode plate includes a negative electrode material. The negative electrode material contains a polymer compound having a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of a 1H-NMR spectrum measured using deuterated chloroform as a solvent, or contains a polymer compound having a repeating structure of oxy C2-4 alkylene units. The positive electrode plate includes a positive electrode material. A density of the positive electrode material is 3.70 g / cm3 or more and 4.65 g / cm3 or less.

The present invention belongs to the field of organic synthesis and relates to a method for preparing deuterated aromatic hydrocarbons. The present invention proposes a method for preparing deuterated aromatic hydrocarbons by using visible light catalyzed arylthianthrene salts: arylthianthrene salts are used as raw materials under conditions of visible light irradiation at room temperature, deuterated chloroform is a deuterium source, and photocatalyst 2,3,4,5,6-penta(9-carbazolyl)-benzonitrile 5CzBN is a photocatalyst, thereby achieving the preparation of deuterated aromatic hydrocarbons. The method has mild conditions, cheap and easy-to-obtain raw materials, simple operation, high yield, and no metal participation. Preliminary experimental results show that the method can be used for the deuteration of the skeleton structure of various drug molecules, effectively realizing the conversion of drug molecules from C-H bonds to C-D bonds, and providing a material basis for studying the pharmacokinetics of deuterated drug molecules and improving drug efficacy.

The invention discloses a method for quantitatively analyzing the content of 2-methylnaphthalene through nuclear magnetic resonance hydrogen spectroscopy, which adopts an internal standard substance ethylparaben with metering traceability to directly measure the content of 2-methylnaphthalene. The method comprises the following steps: dissolving ethylparaben and 2-methylnaphthalene in deuterated chloroform CDCl3 to obtain a to-be-detected solution, optimizing test parameters of a nuclear magnetic resonance spectrometer, determining a nuclear magnetic resonance hydrogen spectrum of the to-be-detected solution to obtain quantitative peaks of ethylparaben and 2-methylnaphthalene, respectively integrating the quantitative peak of ethylparaben and the quantitative peak of 2-methylnaphthalene to obtain integral areas, and determining the content of the to-be-detected solution in the deuterated chloroform CDCl3. And calculating the actual content of 2-methylnaphthalene according to a formula. The method is simple to operate, low in cost, good in stability and high in precision, and has wide application prospects in the aspects of standard substance calibration, sample content determination and the like.

A xylylene diisocyanate composition includes a xylylene diisocyanate and a specific compound. The specific compound has a peak in a range of chemical shift values of 2.44 ppm to 2.46 ppm based on chloroform in deuterated chloroform when the xylylene diisocyanate composition is mixed with the deuterated chloroform and measured by 1H-NMR measurement.

The application provides a preparation method of deuterated chloroform (CCl3D). The method comprises the following steps: after deuterated methane and Cl2 are mixed in a photochemical reactor under the action of ultraviolet-visible light and a catalyst, deuterated chloroform is obtained through the treatment of alkali washing, liquid separation, drying and distillation in sequence. The method realizes the selective reaction of deuterated methane and chlorine under mild conditions by using a new type of high-efficiency catalyst and cooperating with a photochemical reactor. The raw material for producing the deuterated chloroform is easy to obtain, the preparation period is short, and the continuous production can be realized. In addition, the method also produces by-products such as deuterated monochloromethane and deuterated dichloromethane, which have certain application value, and further improves the economic benefits of the overall production process. The deuterated chloroform prepared by the application can not only improve the accuracy of analysis, enhance the repeatability and comparability of experiments, protect experimental equipment and samples, but also meet specific application requirements and improve product quality in practical application.

The invention discloses a preparation method of deuterated chloroform, which comprises the following steps: reacting hexachloroacetone and heavy water at 80-100 DEG C under the action of a cesium-containing catalyst, distilling while reacting, collecting fractions at 60-61 DEG C to obtain a deuterated chloroform crude product, and further post-treating to obtain a deuterated chloroform refined product, the cesium-containing catalyst is cesium salt or cesium oxide. The preparation method is high in yield and low in cost, the catalyst can be conveniently and mechanically used, and the loss of high-value heavy water is avoided.

The invention discloses a synthetic method of deuterated dichloromethane, and belongs to the technical field of organic synthesis. The invention provides a synthetic method of deuterated dichloromethane, which comprises the following steps: mixing deuterated chloroform, an active deuterium substrate, a deuterated phosphine oxide compound, a cationic organic small molecule catalyst and alkali for reaction, and after the reaction, performing post-treatment to obtain the deuterated dichloromethane. According to the invention, deuterated chloroform is taken as a main raw material, and deuterated dichloromethane can be obtained through smooth reaction in a deuterated phosphine oxide compound, an active deuterium substrate, alkali and a cationic organic small molecule catalyst. The reaction strategy is carried out under mild reaction conditions, and byproducts can be directly sold as products or recycled, so that the influence on the environment is greatly reduced, and the preparation cost of the products is effectively reduced.

To provide a resin composition and an adhesive which can suppress bleeding, at least thermosetting. A resin composition comprising: (A) a polymerizable compound having a carbon-carbon double bond, (B) a polythiol compound, (C) a polymerization initiator, and (D) a modified dimethylpolysiloxane satisfying at least one of the following characteristics (a) and (b): (a) an organic substituent containing a COOH group or an OH group is directly bonded to the dimethylpolysiloxane, or is bonded to the dimethylpolysiloxane through a linking group; (b) a signal disappears in deuterated chloroform 1 In the1H NMR spectrum, signals were present in the ranges of 0.3 to -0.3 ppm and 4.4 to 3.2 ppm, and a signal disappeared due to the addition of D2O in the range of 13 to 0 ppm.

Provided is a thermally conductive member including a silicone matrix and a thermally conductive filler, wherein, in a 1H-NMR spectrum measured for a component extracted by immersing the thermally conductive member in deuterated chloroform, the ratio alpha of the integrated value of a multi-peak at 0.45±0.06 ppm to the integrated value of a peak derived from Si-CnH2n+1 is 0.05-0.30%.

The present invention provides a qNMR determination method for total coffee diterpenes and its application, belonging to the technical field of food detection. The present invention is a convenient technique for determining total coffee diterpenes by qNMR technology based on the application of the internal standard 3,4,5-trimethoxybenzaldehyde. The present invention can determine the quantitative results of 5 main coffee diterpenes such as cafestol and kahweol, and has great superiority over the previous methods for determining total diterpenes by spectral analysis. By using deuterated chloroform / deuterated water for ultrasonic-assisted extraction to process the analysis sample, the present invention greatly shortens the sample processing flow, and is a fast, simple, efficient and accurate method for determining total coffee diterpenes.