96 results about "Copper(I) bromide" patented technology

The invention provides a hyperbranched polymer and a preparation method thereof, wherein the preparation method comprises the steps of taking methyl acrylate, ethanolamine, 2-bromoethanol and propandioic acid as raw materials to synthesize a hyperbranched poly (amine-ester) nuclear molecule comprising a bromine terminal group; taking cuprous bromide and 2,2-bipyridyl as a catalyst and a coordinating agent; respectively grafting acrylic acid and single methyl oxygen radical sealed allyl polyethylene glycol into the hyperbranched poly (amine-ester) comprising bromine terminal group by means of an atom transfer radical polymerization method so as to obtain a hyperbranched polymer. The invention further provides a hyperbranched type water reducing agent of polycarboxylic acid series mainly comprising the hyperbranched polymer and the application thereof, wherein the water reducing agent improves the faults of existing water reducing agent of which the adding quantity is large and the cement adaptability is bad and the like,. and has the advantages that the adding quantity is low, the water reducing efficiency is high, the loss of slump is less, the compatibility to the cement is good, the frozen resistance is strong and the like, the properties of the product are stable, and the water reducing agent has no tendency of layering and precipitating and has no toxicity and pollution after storing for a long time.

The present invention relates to a modified cellulose nanometer crystal and a preparation method thereof, and belongs to the technical field of material modification and use. The preparation method comprises: (1) carry out a reaction of 2-bromo isobutyryl bromide and a cellulose nanometer crystal by using an esterification reaction so as to obtain cellulose nanometer crystal bromo isobutyrate; and (2) grafting a monomer styrene onto the cellulose nanometer crystal surface by using an atom transfer free radical polymerization technology under the catalysis effect of cuprous bromide under assisted initiation of the bromo isobutyrate so as to prepare a series of the cellulose nanometer crystals with different modification effects. According to the present invention, the concentrations of the cellulose nanometer crystal and the monomer and the use amounts of the initiator and the catalyst are changed to adjust the grafting density of the polystyrene on the cellulose nanometer crystal surface and the grafting chain length so as to improve the thermal stability and the hydrophobicity of the cellulose nanometer crystal and achieve the modification effect meeting the material application requirements, such that the modified cellulose nanometer crystal is suitable for preparing the organic composite material.

The present invention discloses a method for preparing disperse blue 360. 2-Bromothiazole is used as a raw material and is subjected to four unit reaction processes of nitration, hydrazination, amination and oxidation to obtain the target product. Its specific route is as follows: 2-bromothiazole is used as a raw material and subjected to a nitration reaction under the action of a mixture of concentrated nitric acid and concentrated sulphuric acid using to produce 2-bromo-5-nitrothiazole, the resulting 2-bromo-5-nitrothiazole is reacted using 2-methyltetrahydrofuran as a solvent under the action of hydrazine hydrate to produce 2-hydrazino-5-nitrothiazole, the resulting 2-hydrazino-5-nitrothiazole is reacted with 3-methyl-4-chloro-N,N-diethylaniline under the action of triethylamine, cuprous bromide and butanol to produce 2-[[4-(diethylamino)-2-methylphenyl]diamine]-5-nitrothiazole, the prepared 2-[[4-(diethylamino)-2-methylphenyl]diamine]-5-nitrothiazole is reacted under the action of an oxidant to produce the target product. In the present invention, sodium perborate and a composite catalyst are used for the hydrazine oxidation, which solves the problem of a low conversion rate of hydrazine oxidation using hydrogen peroxide as an oxidant, and provides a new preparation method for synthesizing the azo dye.

The invention discloses a thermo-sensitive polymer as well as a synthetic method and application thereof. A structure of the thermo-sensitive polymer is as shown in formula I. The synthetic method comprises the following steps: adding an initiator, a monomer and a ligand into a solvent, deoxygenating, adding cuprous bromide, reacting for 0.5 to 5 hours, washing product precipitates for a pluralityof times, drying, and obtaining a copolymer; dissolving the copolymer in a N,N-dimethyl formamide solution; and adding imidazole, reacting for 24 to 48 hours, precipitating a product, washing for a plurality of times, drying, and obtaining the thermo-sensitive polymer. The thermo-sensitive polymer can have different thermo-sensitive characteristics by adjusting the composition of the copolymer; and by adjusting the polymer composition in a wider range, the turbidity point temperature of LCST or UCST can be changed, and the thermo-sensitive polymer can be applied to various fields such as biochemistry, medicine or food of drug controlled release, catalyst step-by-step release, cell embedding and the like.

The invention discloses a CuBrN2P type cuprous complex orange luminescent material based on benzoxazolyl pyridine and a preparing method of the CuBrN2P type cuprous complex orange luminescent material. A phosphorescence complex is obtained through a complexing reaction of cuprous bromide and a ligand, and the molecular structural formula of the phosphorescence complex is CuBr(2-PBO)(PPh3), wherein 2-PBO and PPh3 in the formula are an electric neutral ligand 2-(2-benzoxazole)pyridine and triphenylphosphine respectively. The complex has the advantages of being easy to purify due to small molecules and high in luminescent efficiency, and has the advantage of being easy to dissolve with an organic solvent. The material is obtained through a reaction achieved by directly mixing cuprous bromide and a ligand solution, and has the advantages that the process is easy and convenient, equipment is simple, raw materials are easy to obtain, and cost is low. The material can serve as a photoluminescence orange light material and can also serve as a luminescent layer phosphorescent material in an electroluminescence device composed of multiple layers of organic materials.

The invention provides a preparation method of cationic polystyrene resin. The unmodified resin used in the method is a large-particle-size macroporous polystyrene resin microspheres, and a cationic polymer for modification is polymethacryloxyethyltrimethyl ammonium chloride; the method comprises the steps of firstly, swelling polystyrene resin microspheres by using dichloromethane, then washing and filtering for a plurality of times successively with tetrahydrofuran, ultrapure water, absolute ethanol and methanol, and finally carrying out vacuum drying; then, utilizing a friedel-crafts acylation reaction to graft the surfaces of the pretreated microspheres with an acylating reagent 2-bromo-2-methylpropionyl bromide so as to obtain an acylated polystyrene resin macroinitiator; finally, initiating the polymerization of a cationic monomer, i.e., methacryloxyethyltrimethyl ammonium chloride by using an atom transfer radical polymerization method of a catalyst generated by electron transfer as well as taking cuprous bromide as the catalyst and ascorbic acid as a reducing agent. The preparation method provided by the invention solves the problems that the existing large-particle-size cationic polystyrene resin is low in surface charge amount and difficult in control of a preparation process, pollutes the environment, and is high in cost.

The invention discloses a copper metal organic framework material with supercapacitor performance as well as preparation method and application thereof. The preparation method comprises the following steps: firstly mixing 4,2':6',4-tripyridine-4'-benzoic acid with cuprous bromide, adding methanol, adequately stirring for dissolving so as to obtain a mixed solution, and adjusting the pH value of the mixed solution to 6.8-7.2 by virtue of sodium hydroxide; and reacting by virtue of the mixed solution at 110-140 DEG C for 24-60 hours, cooling, filtering, separating out crystals, and finally washing and drying, so as to obtain the copper metal organic framework material with the supercapacitor performance. According to the preparation method, a Cu-MOF material with a three-dimensional structure and a conductive network framework is synthesized from 4,2':6',4-tripyridine-4'-benzoic acid and cuprous bromide by virtue of a hydrothermal method and has specific capacitance and good rate capability and cycling stability.

The invention discloses a preparation method of a composite polymer electrolyte. The preparation method of the composite polymer electrolyte comprises the step of obtaining a composite polymer electrolyte through an ion conductive agent; and the preparation method of the ion conductive agent comprises the following steps: in an inert gas atmosphere, dissolving cuprous bromide powder and pentamethyl diethylenetriamine into a first organic solvent to prepare a catalyst solution; adding a monomer A such as N,N-Dimethylaminoethyl Methacrylate, a monomer B such as di(ethylene glycol) methyl ether methacrylate and a first initiator into the catalyst solution respectively, carrying out an atom transfer radical polymerization reaction at the temperature of 75 to 85 DEG C, and reacting for 10 to 60min to obtain a reaction product; adding excess cyclohexane into the reaction product to obtain a flocculent precipitate, and purifying the flocculent precipitate to obtain the ion conductive agent.According to the ion conductive agent, the amorphous region of the composite polymer electrolyte is added, the crystallization of the polymer matrix can be effectively inhibited, the glass transitiontemperature is reduced, and then the low-temperature ionic conductivity of the composite polymer electrolyte is strengthened.

The invention provides a grinding preparation method of copper (I)-bromine hybrid fluorescent materials, wherein the grinding preparation method comprises the steps: mixing and grinding cuprous bromide and tetraalkylammonium bromide salts, and recrystallizing to obtain the copper (I)-bromine hybrid materials with different fluorescence colors. The copper (I)-bromine hybrid fluorescent materials with different fluorescent colors can be prepared by adopting tetraalkyl ammonium bromide salts with different alkyl chain lengths. The preparation method is simple and convenient, mild in condition, low in cost, short in consumed time, high in yield and suitable for batch production, and the prepared copper (I)-bromine hybrid materials are good in fluorescence stability and has great application potential in the fields of chemical sensing analysis, optics, electrical devices and the like.

The invention discloses a synthetic method of 2-bromo-5-iodotoluene. The product is prepared by using o-toluidine as a staring material through iodination, diazotization and bromination, wherein in the step of iodination, iodine powder is used as an iodination reagent, sodium percarbonate is used as an oxidizing agent and an ethyl acetate / glacial acetic acid mixed solution is used as a solvent; the steps of diazotization and bromination are completed by adopting a one-pot method, and sodium nitrite and hydrobromic acid are used as reaction reagents and copper powder / copper bromide is used as a bromination catalyst in the steps. The method for synthesizing 2-bromo-5-iodotoluene by utilizing the process route has the advantages that the raw materials in the step of iodination are safe and accessible; the process is simple and convenient to operate; the reaction conditions are mild; the raw material conversion rate is high; the total mole yield of iodine atoms can be 72% or above; the steps of diazotization and bromination are combined, are completed by the one-pot method and are simple and convenient to operate; few byproducts are generated; hydrobromic acid can be used indiscriminately multiple times after being treated, so that the cost is saved and the material is more environment-friendly.

The invention provides a hyperbranched polymer and a preparation method thereof, wherein the preparation method comprises the steps of taking methyl acrylate, ethanolamine, 2-bromoethanol and propandioic acid as raw materials to synthesize a hyperbranched poly (amine-ester) nuclear molecule comprising a bromine terminal group; taking cuprous bromide and 2,2-bipyridyl as a catalyst and a coordinating agent; respectively grafting acrylic acid and single methyl oxygen radical sealed allyl polyethylene glycol into the hyperbranched poly (amine-ester) comprising bromine terminal group by means of an atom transfer radical polymerization method so as to obtain a hyperbranched polymer. The invention further provides a hyperbranched type water reducing agent of polycarboxylic acid series mainly comprising the hyperbranched polymer and the application thereof, wherein the water reducing agent improves the faults of existing water reducing agent of which the adding quantity is large and the cement adaptability is bad and the like,. and has the advantages that the adding quantity is low, the water reducing efficiency is high, the loss of slump is less, the compatibility to the cement is good,the frozen resistance is strong and the like, the properties of the product are stable, and the water reducing agent has no tendency of layering and precipitating and has no toxicity and pollution after storing for a long time.

The invention discloses a copper catalyst system for sonogashira coupling reaction. The copper catalyst system comprises copper salt, phosphine ligands and inorganic alkaline according to a mol ratio of 1: (50000-200000): (200000-1000000), wherein the copper salt is selected from one kind of materials or a mixture of more than one kind of materials from copper iodide, copper acetylacetonate, copper bromide, copper sulfate and copper powder, and the phosphine ligands are trivalent phosphine ligands. The invention discloses the novel copper catalyst system for sonogashira coupling reaction. Compared with the existing noble-metal-containing catalyst system, the catalyst system has the advantages that the cheap copper salt is used for replacing the noble metal, the cost is greatly reduced, inaddition, the environmental-friendly water can be adopted as reaction solvents, the environment is favorably protected, the cost is favorably saved, and the reaction also obtains great progress in green chemistry.