97 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 invention discloses a preparation method of 5-bromo-1,3-dichloro-2-fluorobenzene, which comprises the following steps: (1) simultaneously feeding ammonium salt and a sodium nitrite aqueous solution into a tubular reactor for tubular diazotization reaction so as to obtain a diazonium salt intermediate, wherein the ammonium salt is prepared through dissolving 3,5-dichloro-4-fluoroaniline in sulfuric acid; (2) dissolving cuprous bromide in hydrobromic acid, heating to 100-130 DEG C, dropwise adding the diazonium salt intermediate prepared in the step (1) for reaction, and after the complete reaction, performing after-treatment to obtain the 5-bromo-1,3-dichloro-2-fluorobenzene. According to the preparation method, the tubular diazotization reaction technology is adopted to prepare diazonium salt, so that the side reaction including diazonium salt coupling and decomposition and the like can be reduced, the diazotization reaction is enabled to be more stable, and the final yield is improved; in addition, the tubular diazotization reaction technology has a series of advantages of continuity in production, safety, short reaction time, energy saving and the like, and is relatively suitable for industrial production in the future.

A polygonal crystalline copper powder with high dispersity and diameter uniformity (1-5 microns) is prepared through preparing the solution of Cu salt and the solution of reducer, adding disperser and ammonia water to both solutions, mixing, reacting, separating, washing and drying.

The invention discloses a binuclear Cu(I) complex luminescent material capable of emitting green light and a preparation method of the binuclear Cu(I) complex luminescent material. The green luminescent complex is obtained by complexing cuprous bromide and a ligand, and the molecular structure is [Cu(POP)Br]2, wherein the POP in the formula is an electric neutrality ligand bis(2-diphenyl phosphorus phenyl)ether, and the binuclear structure molecule is formed by coupling a bridging ligand bromide ion with two metal ions. The complex has the advantages that the micromolecule is easy to purify and the luminous efficiency is high, and the heat stability is high. The material is obtained by directly mixing and reacting the cuprous bromide with a dichloromethane solution of the ligand, the process is simple and convenient, the equipment is simple, the raw material is easy to obtain and the cost is low. The material can be used as a photoluminescence green material, and can be further used as a luminescent layer green material in an electroluminescent device composed of multilayer organic materials.

The invention discloses a sugar-responsive medicament delivery material and a preparation method thereof, belonging to the field of biological materials. The chemical structure of the sugar-responsive polymer medicament delivery material is as follows, wherein n is not less than 22 and not more than 110, m is not less than 14 and not more than 100, and the n and the m are integers respectively. The preparation method comprises the following steps: enabling 1,1,1-trimethylolpropane and phenylboronic acid to react according to the molar ratio of 1:1, and getting a compound II; enabling the compound II, triethylamine and acryloyl chloride to react under the protection of nitrogen at the temperature of 0 DEG C, and getting a compound III; enabling polyethylene glycol monomethyl ether, the triethylamine and 2-bromopropionyl bromide to react for preparing a compound IV; and enabling a polyethylene glycol macroinitiator IV, copper bromide, cuprous bromide, pentylene diethylenetriamine and the compound III to react and further getting a compound I. The sugar-responsive medicament delivery material can form a nano-medicament delivery carrier via self-assembly in water solution, an amphiphilic polymer can be transformed from hydrophobicity to hydrophilicity in the place with high blood glucose concentration, and loaded medicament molecules are further released.

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 provides a preparation method for 2-nitro-4-(trifluoromethyl)benzonitrile. The method comprises the following steps: under the protection of nitrogen, successively adding 3-nitro-4-chlorobenzotrifluoride, cyanide, a catalyst II, a catalyst II and a solvent N-methyl-2-pyrrolidone into a reactor; carrying out heating under mechanical stirring; carrying out a reaction at temperature of 185 to 195 DEG C for 5 to 9 h; and then carrying out rectification so as to obtain 2-nitro-4-(trifluoromethyl)benzonitrile. The cyanide is one or more selected from the group consisting of sodium cyanide, potassium cyanide and cuprous cyanide; the catalyst I is one or two selected from the group consisting of cuprous bromide and nickel bromide; and the catalyst II is methylimidazole ionic liquid. According to the preparation method in the invention, the two catalysts are used and reaction temperature is adjusted in stages, so selectivity and conversion rate of the reaction are improved, cost is substantially reduced, and the preparation method is simple.

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 relates to a preparation method for a molecularly imprinted microsphere surface grafted hydrophilic polymer brush, and belongs to the technical field of environment function material preparation. The method comprises the steps of using sulfamethazine as template molecules, using 4-vinylpyridine as a functional monomer, using ethylene glycol dimethacrylate as a cross-linking agent, using methyl alcohol and water as a solvent, using copper bromide / N,N,N',N,'N''-pentamethyldiethylenetriamine / azodiisobutyronitrile as an initiating system to initiate reverse atom transfer radical precipitation and polymerization, so as to prepare the molecularly imprinted polymer microsphere with the surface containing active initiators, using the molecularly imprinted polymer microsphere as the macroinitiator, using cuprous bromide / N,N,N',N',N''-pentamethyldiethylenetriamine as a catalyst, and polymerizing surface initiated atom transfer radical on a molecularly imprinted microsphere surface grafted hydrophilic hydroxyethylmethacylate brush in the methyl alcohol / water mixed solvent. The molecularly imprinted polymer microsphere prepared through the method has higher adsorption capacity, fast adsorption kinetics property and good selective adsorption performance.

The present invention relates to a preparation method for an illite magnetic composite surface imprinting temperature-sensitive adsorbent. The method comprises that: magnetic illite is prepared through solvothermal synthesis; the surface of magnetic illite undergoes ethylene functionalized modification performed by using KH570 and is used as a matrix material; ciprofloxacin is used as a template, hydroxyethyl methacrylate and methacrylic acid are used as a functional monomer; N-isopropyl acrylamide is used as a temperature-sensitive monomer; polyethylene glycol dimethacrylate and N,N'-methylene bisacrylamide are used as a crosslinking agent; copper bromide, N,N,N',N",N"-pentamethyldiethylene triamine and 2-bromoisobutyrate are used as a initiator; the illite magnetic composite surface imprinting temperature-sensitive adsorbent is prepared in a mixed system of methanol and water, and the adsorbent is used for selectively identifying and separating ciprofloxacin in an aqueous environment. The preparation method for illite magnetic composite surface imprinting temperature-sensitive adsorbent provided by the present invention is low in cost and simple in preparation, and the adsorbent is high in accuracy in identifying a target molecule, high in selectivity and excellent in the separation and enrichment capability.

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 provides a nano hydroxyapatite hybrid material which is characterized in that poly(N-isopropylacrylamide) with temperature sensitivity is grafted on the surface of nano hydroxyapatite. A preparation method of the hybrid material is as follows: (1) dissolving a silane coupling agent gama-aminopropyltriethoxysilane in ethanol and water, adding the nano hydroxyapatite the weight of which is 0.5-3 times as heavy as that of the silane coupling agent into the solution, reacting for 3-5 hours, regulating the pH value to 9-10, reacting for 3 hours again, carrying out vacuum filtering, washing with ethanol, and drying; (2) under the protection of nitrogen or argon, reacting the product with bromoisobutyryl bromide for 2-5 hours in anhydrous dimethylformamide in the presence of triethylamine; and (3) reacting for 0.5-24 hours by taking the products as initiators, using cuprous bromide / 2-2' bipyridine as a catalyst and using N,N-methylenebisacrylamide as a cross-linking agent under an oxygen-free condition in water from room temperature to 70 DEG C. In the invention, the reaction condition is mild, the product has the advantages of good bioactivity, good biocompatibility and good temperature sensitivity, and hydrophobic-hydrophilic reverse transformation happens at the temperature of about 32 DEG C.

The invention discloses modified magnetic nano-silica and application thereof in oil-water separation. The modified magnetic nano-silica is prepared by the following steps: reacting magnetic nano-silica with an amino silane coupling agent, so as to obtain aminated magnetic nano-silica; dispersing aminated magnetic nano-silica into paraffin, and stirring, so as to obtain aminated magnetic nano-silica paraffin sphere; adding an acid capture agent, dropwise adding bromo-alkyl acyl bromide or bromo-alkyl acyl chloride under an ice-water bath condition, and reacting, so as to obtain a magnetic nano-silica initiator; mixing the magnetic nano-silica initiator with monomers, cuprous bromide, ligand and a solvent, carrying out deoxygenization, and reacting, so as to obtain polymer partially-modified magnetic nano-silica; slowly dropwise adding polymer partially-modified magnetic nano-silica into a poly(glyceryl methacrylate) solution, and reacting, so as to obtain polymer-modified magnetic nano-silica; and finally, dropwise adding polymer-modified magnetic nano-silica into a polyethyleneimine solution, and stirring to react, so as to obtain modified magnetic nano-silica. A modified magnetic nano-silica particle has very good stability, emulsified oil separation performance and recoverability.

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 relates to a positive electrode active material for a zinc-bromine single-flow battery. The positive electrode material is carbon-coated cuprous bromide, and the mass ratio of carbon tocuprous bromide is 1:10 to 1:20. The positive active material is used as an active material in the positive electrode of the zinc-bromine single-flow battery. The problem of serious corrosion of the positive electrode of the zinc-bromine single-flow battery is solved.

The invention relates to a sheet crystal copper powder, wherein its production comprises (1), adding disperser and ammonia I into reactant copper bromide suspension, to be mixed with reducer solution, and reacted at 40-70Deg. C; after 0.5h, adding ammonia II, reacting for 1-4h; the obtained copper powder is well grown crystal powder, with flat surface and sheet shape, whose diameter is 0.5-10mcirometer, thickness is 0.1-0.8micrometer and the length-width ratio of particle is 5-30.

The invention relates to the field of polymer synthesis. The invention provides a preparation method of an ultra-high graft density polymer molecular brush. The method comprises the following steps: firstly, preparing a SiO2 / Si substrate by using a single-crystal silicon wafer, and then self-assembling an initiator monomolecular layer on the surface of the SiO2 / Si substrate, wherein an initiator is 22-(trichlorosilyl)docosa-2-bromo-2-phenylacetate; finally, under nitrogen protection, enabling the product to react with cuprous bromide, styrene, pentamethyl diethyl triamine and toluene to prepare the ultra-high graft density polymer molecular brush. The results of the embodiments show that the thickness of the polymer molecular brush is 55-65 nm, and the graft density of the polymer molecular brush is 1.21-1.23 chains / nm<2>.

The invention relates to a terphenyl biphosphine three-coordination cuprous halide complex as well as a synthesis method and application and belongs to the technical field of light emitting materials.According to the complex, 1,2-dimethyl-4,5-dibromo-benzene is adopted as initial raw materials, a terphenyl bilithium reagent is synthesized through intermolecular coupling reactions, ligand dbdp issynthesized through a nucleophilic substitution reaction with diphenyl chlorphonium, dbdp is adopted as ligand to react with cuprous halide to synthesize a target product provided by the invention, and finally structures and light emission properties of the target product are represented. Results show that at a normal temperature, a solid terphenyl biphosphine three-coordination cuprous iodide complex emits green light, and a terphenyl biphosphine three-coordination cuprous bromide complex and a terphenyl biphosphine three-coordination cuprous chloride complex emit yellow and green light. Thesynthesis method is simple and easy to operate, in addition, the prepared target product has a microsecond-grade service life at the room temperature, and the result shows that the target product hasa light emission mechanism of thermal activity delayed fluorescence and has great potential of being used as an electroluminescent material applied to OLEDs (Organic Light Emitting Diodes).

The invention discloses a method for synthesizing indole[1,2-c]quinazoline compounds, and belongs to the technical field of organic synthesis. The technical scheme of the invention is that the methodfor synthesizing the indole[1,2-c]quinazoline compounds comprises the following steps: placing an N-(2-(1H-indol-2-yl)phenyl)benzamide compound, 1,4-dioxane and cuprous bromide into a reaction vessel,adding dilute hydrochloric acid under stirring at room temperature, and carrying out a reflux reaction at 120 DEG C until the reaction is completed through the monitoring by using thin-layer chromatography(TLC), so that an indole[1,2-c]quinazoline compound is finally obtained. The method provided by the invention has the advantages of mild reaction condition, simple operation and wide substrate application range.

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 discloses a CuBrN2P type cuprous complex yellow phosphorescent material based on diphenyleneimine and a preparing method thereof. The phosphorescent complex is obtained through coordination reaction of cuprous bromide and a ligand. The molecular structural formula of the phosphorescent complex is CuBr(TPP)(DAF).CH3Cl, wherein TPP and DAF are electroneutral triphenylphosphine containing a P ligand and heterocyclic ligand 4,5-carbolines respectively. The complex has the advantages that micromolecule purification is easy and luminous efficiency is high and also has the advantage of being capable of being easily dissolved in organic solvent. The material is obtained through direct mixed reaction of cuprous bromide and a ligand solution and has the advantages that technology is simple, equipment is simple, and raw materials are easy to obtain and low in cost. The material can serve as a photoluminescence yellow luminescent material and can also serve as a luminescent layer phosphor material in an electroluminescence device composed of multiple layers of organic materials.

The invention discloses a novel method for synthesizing an oxazole compound. The novel method comprises the following steps: in the presence of oxygen, adding 0.1mmol of an enaminone compound and 30%mmol of a copper salt catalyst (such as copper bromide, copper chloride and cupric iodide) into a solvent (such as solutions of DMF (Dimethyl Formamide) and DMSO (Dimethylsulfoxide)), stirring to react for 2 hours at 80-100 DEG C, and tracking reaction with TLC (Thin-Layer Chromatography); and after the enaminone compound is completely consumed, cooling to the room temperature, performing depressurized sucking filtration to remove the solvent, and purifying by using silicagel column chromatography with ethyl acetate and petroleum ether in a ratio of 1:100, thereby obtaining a product. According to the novel method, the enaminone compound and oxygen are adopted as raw materials, C-H based activation is performed, and under the catalytic action of the copper salt, the oxazole compound can be synthesized by using a one-pot method. The novel method disclosed by the invention is easy in raw material obtaining, simple to operate, gentle in condition, good in yield and wide in application prospect.

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 relates to a double-arm hyperbranched starlike amphiphilic polylactic acid-poly2-methacryloyloxy ethyl phosphorylcholine block polymer and a preparation method thereof. The preparation method comprises the following steps of: adding nitrine group-containing polylactic acid into a reactor; adding alkynyl-containing PMPC, 2,2-bipyridine and cuprous bromide to stir; adding absolute methanol and dimethylformamide to dissolve; placing the reactor into a heat-preserving cup accommodating liquid nitrogen to freeze; vacuumizing; introducing inert gas; unfreezing in warm water; placing the reactor into the heat-preserving cup accommodating the liquid nitrogen to freeze again; vacuumizing again; and reacting at the temperature of between 0 and 200 DEG C for 1 hour to 2 days to obtain a product. The block polymer prepared by the method is self-assembled to obtain a nano-sized medicine transmission system, wherein the hydrophobic core can serve as a medicine carrier to wrap and loada hydrophobic medicine; and the hydrophilic shell has the effects of maintaining stability of micelle and prolonging time of body circulation.

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.

The invention relates to a castor-oil-based ordered polymer and a preparation method thereof. The preparation method comprises the following steps of: dissolving castor oil in an organic solvent, adding dibromo-isobutyl acyl bromide or / and a catalyst, reacting at a specific temperature, synthesizing an atom transferring free radical polymerization initiator based on castor oil base, then adding the initiator and the solvent to a reaction flask, sequentially adding cuprous bromide or cuprous chloride, a monomer and a ligand according to a certain proportion, feeding nitrogen and bubbling so as to remove oxygen, reacting for 1-24 hours at 50-120 DEG C, precipitating the polymer in methanol, and then filtering and drying to obtain the product. The castor-oil-based ordered polymer with different molecular weights and molecular weight distribution can be obtained by the method and has very good application prospect in the aspects of coatings, surface active agents, medicines and the like.