100results about How to "The synthesis method is simple and controllable" patented technology

The invention provides a method for preparing polyhedral cuprous oxide nanometer granules. The method adopts a chemical solution method to prepare polyhedral cuprous oxide nanometer granules comprising cubes, chamfered cubes, cubic octahedrons, chamfered octahedrons or octahedral series. The method comprises the following concrete steps: copper salt is dissolved in water and stirred at a temperature between 50 and 60 DEG C; polyvinyl pyrrolidone, strong base solution and ascorbic acid solution are orderly added, stirred at a constant temperature between 50 and 60 DEG C and kept for 1 to 3 hours; after the reaction is over, the centrifugation is carried out; and a large amount of the deionized water is used for washing, and the cuprous oxide nanometer granules can be obtained after vacuum drying. By regulating the adding amount of the polyvinyl pyrrolidone, the polyhedral cuprous oxide nanometer granules comprising the cubes, the chamfered cubes, the cubic octahedrons, the chamfered octahedrons or the octahedral series are obtained. The method has the advantages of moderate condition, simple operation, low cost, high yield, controllable shape, and so on.

The invention relates to a lithium ion battery anode material precursor and a preparation method thereof. The precursor is sheet hydrated iron phosphate, and the preparation method comprises the following steps of: dissolving a surface active agent, an iron source compound and a phosphorus source compound in water to form a uniform and stable solution A, wherein the added quantity of the surface active agent is 2 to 10 g / L, the concentration of iron is 0.08 to 0.32 mol / L, the mole ratio of the iron to phosphorus is 1:X, and X is more than or equal to 3.0 and less than or equal to 5.0; adding oxydol into the solution A, and stirring to obtain a solution B; performing high-temperature reaction on the solution B to obtain a solution C; and filtering the solution C to obtain the hydrated iron phosphate. By the method, the sheet hydrated iron phosphate with a controllable shape can be prepared, thus the electrochemical performance of a lithium ion battery anode material namely lithium iron phosphate is improved; and the filtrate obtained in the preparation process can be recycled to improve the utilization ratio of raw materials.

The invention discloses a composite lithium metal negative electrode based on an MXene aerogel and a synthesis method thereof, which belong to the field of lithium batteries. The composite lithium metal negative electrode comprises metal lithium and the MXene aerogel, wherein the MXene aerogel is assembled by cross-linking of two-dimensional MXene sheets and has a three-dimensional hierarchical porous structure; the MXene aerogel pores are filled with the metal lithium; and the thickness of the MXene aerogel is 300 mum to 800 mum. According to the composite lithium metal negative electrode prepared in the invention, rich pro-lithium functional groups on the surface of the MXene aerogel can be specifically combined with the lithium ions, uniform nucleation of lithium is thus realized, formation of lithium dendrites is suppressed, and the coulombic efficiency, the safety and the cycle life of the lithium metal negative electrode are effectively improved.

The invention provides a method for synthesizing carbon quantum dots on the basis of amino acids and iron ions, belonging to the field of preparation of fluorescent nano materials. The method comprises the following steps: oscillating and mixing a mixed solution of iron nitrate and amino acid in a mole ratio of 1:(5-10), and heating to react in an 80-DEG C water bath; and after the reaction finishes, naturally cooling to room temperature, dialyzing and filtering to obtain the carbon quantum dot water solution. The added iron nitrate can enhance the fluorescence intensity of the carbon quantum dots synthesized from tryptophan; and particularly, it is detected that only iron ions have such effects at present. By using accessible tryptophan as the carbon source, the iron ions are doped on such basis to synthesize the high-fluorescence carbon quantum dots. The synthesis method is controllable, simple and economical.

The invention provides a method for synthesizing doxepin hydrochloride. The method comprises the following steps of: 1, carrying out an addition reaction on 6,11-dihydrobenz [b,e] oxepin-11-one and 3-chloropropyl-methyl tert-butyl ether to obtain alcohol compounds; 2, removing hydroxyl from the alcohol compounds under the condition of concentrated hydrochloric acid to obtain olefin compounds; 3, reacting the olefin compounds with thionyl chloride in a reaction solvent to obtain chloride; 4, coupling the chloride with N,N-dimethyl methylamine to obtain doxepin; and 5, preparing the doxepin into hydrochloride of the doxepin to obtain the doxepin hydrochloride. An Ni(OAc)2 / PPh3 system is creatively used in C-N coupling reaction in the step 4, thus the doxepin hydrochloride has the characteristics of good reaction selectivity, high yield and environmental friendliness; and the catalyst is can be recycled after being simply filtered, thus the production cost is greatly lowered. The whole method has the advantages of simpleness in operation, and easy obtaining and low cost of raw materials, accords with the requirement of industrial production, and is expected to be industrially applied.

The invention relates to inorganic nano-material preparing, particularly to a preparation method for photosensitive and amphiphilic polyurethane-stabilized nano-zinc oxide, wherein a new photosensitive and amphiphilic polyurethane is adopted to carry out coating, an inverse emulsion technology is adopted to prepare the nano-zinc oxide, such that the photosensitive and amphiphilic polyurethane-stabilized nano-zinc oxide is formed. The novel nano-zinc oxide synthesized through the method provided by the present invention has a particle size of 20-800 nm, can be regulated through simply controlling reaction conditions (such as reactant concentrations, ultrasonic emulsification power and the like), and has good dispersity and good dispersion stability in an organic solvent system. The synthesis method for the photosensitive and amphiphilic polyurethane prepolymer has characteristics of simpleness, controllable process, easy availability of the raw materials, non toxicity and harm, and easy industrial production. The prepared nano-ZnO can be adopted as a functional nano-filler in various polymer systems, such that characteristics of anti-ultraviolet property, mechanical property and the like of the polymer can be improved.

The invention provides a preparation method of a platinum / molybdenum disulfide nanosheet / graphene three-dimensional composite electrode catalyst. The preparation method comprises the following steps: ultrasonically dispersing molybdenum disulfide nanosheets in isopropanol and glycol, adding graphite oxide, carrying out ultrasonic treatment, adding a platinum salt solution, and magnetically stirring all above substances to fully mix the substances; and transferring the above obtained mixture into a hydrothermal kettle, carrying out a reaction to obtain a hydrogel-shaped product, carrying out dialysis water washing treatment, and freeze-drying the obtained product to remove water in order to obtain the platinum / molybdenum disulfide nanosheet / graphene three-dimensional composite electrode catalyst. The platinum / molybdenum disulfide nanosheet / graphene three-dimensional composite electrode catalyst prepared through using the preparation method has a good application prospect and a good economic benefit in the fields of electrocatalytic hydrogen production and fuel cells.

The invention discloses a lithium ion battery cathode material carbon microsphere and a preparation method thereof. The preparation method comprises that in the presence of a catalyst, through optimization of condition factors such as a temperature in a reaction vessel system, time and carbon source kinds, a carbon microsphere intermediate having controllable morphology is obtained, and the carbon microsphere intermediate is sintered into a carbon microsphere sample in an inert atmosphere in a tubular furnace. The preparation method ingeniously and efficiently utilizes raw materials, fills the gap of development of a nano-material in lithium ion battery cathode material preparation, enriches a material preparation method, and effectively solves the problem that the existing carbon cathode material of a lithium ion battery has a high first irreversible capacity and poor rate discharge performances.

The invention discloses a 2,3-indolinone-3-N-alkenylnitrone cycloaddition derivative and a synthesis method and application thereof. The derivative has the structure shown in the formula (I). The synthesis method includes the steps that a 2,3-indolinone-3-oxime derivative shown in the formula (II), cyclopropyboronic acid shown in the formula (III), copper salt and alkaline matter are obtained and placed in organic solvent and react under the condition that oxygen exists, and a target crude product is prepared. The synthesis method of the derivative is simple and easy to control, the period is short, the yield is high, part of compounds in the derivative have remarkable anti-tumor activity, and a lead compound is provided for developing new anti-tumor medicine. Please see the compounds of the structures shown in the formula (I), the formula (II) and the formula (III) in the description.

The invention relates to a method for preparing temperature-responsive comb-structure polycarboxylic acid through terminal group functionalization. According to the method, with a temperature-responsive monomer, unsaturated halogenated hydrocarbon, a small carboxylic acid momonomer and the like as raw materials, a polycarboxylate material is prepared through self-polymerization first, then substitution and then copolymerization; namely, with the temperature-responsive monomer as a reactant, a terminal group-functionalized temperature-responsive polymer chain is produced through the self-polymerization under the actions of an initiator and a terminal group functionalizing agent, then a substitution reaction is performed on the terminal group-functionalized temperature-responsive polymer chain and the unsaturated halogenated hydrocarbon to obtain a temperature-responsive macromonomer, and finally a copolymerization reaction is performed on the temperature-responsive macromonomer and thesmall carboxylic acid momonomer under the action of the initiator to obtain a comb-structure polymer which uses polycarboxylic acid as a main chain and has a side chain with a temperature-responsive function. By the method, the process is simple, convenient and fast, the molecular weight of a product is controllable, graft polymerization of the temperature-responsive functional macromonomer on polycarboxylic acid is successfully achieved by a terminal group functionalization method, the effects of inhibiting shrinkage and resisting cracking of cement mortar are excellent, and the scientific research value and economic and social benefits are very good.

The invention provides a method for preparing a cross-linked acid. The method comprises the following steps: 1) adding an acid-resistant thickening agent into a hydrochloric acid solution at a first stirring speed, and stirring at a second stirring speed to obtain a first acid solution; 2) sequentially adding an iron ion stabilizer, a corrosion inhibitor and a demulsification cleanup additive intothe first acid solution, uniformly stirring at a third stirring speed, and standing to obtain a cross-linked acid base solution, and 3) adding a cross-linking agent into the cross-linked acid base solution, and uniformly stirring at a fourth stirring speed to obtain the cross-linked acid.

The invention provides an alpha helix cationic polypeptide as well as a preparation method and application of the alpha helix cationic polypeptide. The alpha helix cationic polypeptide takes a photosensitizer porphyrin as a core and alpha helix polypeptides as four arms, and a nucleotide drug prepared from the polymer can be applied to a nucleotide drug delivery system. The polymer provided by theinvention has good biocompatibility, low cytotoxicity and light activation ability. The polymer provided by the invention is self-assembled in a water solution to form nanoparticles which has good stability, biocompatibility and low cytotoxicity; the preparation method is simple and high in repeatability, and the polymer serving as a carrier is not only capable of protecting nucleic acid such asDNA from being degraded, but also capable of being combined with the scale effect of the nanoparticles so as to be used for treating diseases; and in addition, the transfection promoting effect for different cancer cells can be achieved by virtue of the light activation ability.

The invention discloses silicon-nitrile-based hybrid resin and a synthesizing method thereof. The molecular structural formula of the silicon-nitrile-based hybrid resin is shown as a formula (I). The synthesizing method comprises the following steps that reacting is performed by taking sulfydryl propyl methylsiloxane and 4-nitrophthalonitrile as main raw materials, and then the silicon-nitrile-based hybrid resin is obtained. The silicon-nitrile-based hybrid resin has the advantages of being low in melting point, capable of resisting high temperature, not prone to hydrolysis, excellent in heat stability and curing performance and the like; the synthesizing method is simple and easy to control, lower in reaction temperature, shorter in time and suitable for industrialized production.

The invention discloses an aromatic ether nitrile-group resin monomer and a synthesis method thereof. The molecular structural formula of the aromatic ether nitrile-group resin monomer is shown in (I). The synthesis method comprises the steps that 1, resorcinol and 2,6-dichlorobenzonitrile serve as the main raw materials to prepare 2,6-bis(3-oxygroup phenoxyl)benzonitrile; 2, 4-nitrophthalonitrile and the 2,6-bis(3-oxygroup phenoxyl)benzonitrile serve as the raw materials for reaction, and the aromatic ether nitrile-group resin monomer is obtained. The aromatic ether nitrile-group resin monomer has the advantages of being high in nitrile-group content, high in heat resistance, high in mechanical properties, short in post-curing time and the like, the synthesis method is simple and easy to control, the aromatic ether nitrile-group resin monomer is synthesized through a two-step reaction in one kettle, waste of the raw materials can be reduced, intermediate links are simplified, the preparation time is shortened, and the synthesis method is suitable for low-cost industrial production.

The invention discloses a series of 1-oxy-2,8-diazacyclononane derivatives and a synthetic method thereof. The 1-oxy-2,8-diazacyclononane derivatives have structures shown by the following formula (I). The synthetic method of the derivatives comprises the following steps of: taking a compound shown by the following formula (II) and a compound shown by the following formula (III), and putting the compounds into an organic solvent to react in the presence of oxygen, thereby preparing a target crude product. The method disclosed by the invention is simple and easy to control, is short in period, and does not need a condition without water and oxygen. The compounds with structures shown by the formulas (I), (II) and (III) are shown in the specification.

The invention belongs to the technical fields of ultraviolet curing and polymerization and discloses an ultraviolet-cured biomass methacrylate and / or acrylate prepolymer and a preparation method thereof. The preparation method comprises the following steps: firstly synthesizing a diisocyanate prepolymer (I) from hydroxypropyl methacrylate or hydroxypropyl acrylate substances and diisocyanate under the actions of dimethylformamide (DMF) and a nitrogen protecting catalyst; and reacting by virtue of biomass cardanol and 4-chloro-1,3-butanediol under the action of strong base so as to generate diol (II), and reacting by virtue of diol (II) and synthesized diisocyanate prepolymer (I) so as to generate the ultraviolet-cured biomass methacrylate and / or acrylate prepolymer. The prepared ultraviolet-cured prepolymer has high light curing efficiency and good wear resistance and thermal stability, is adjustable in product viscosity and can be applied to the fields of ultraviolet-cured coatings, ink, adhesives and the like.

The invention relates to a manganese dioxide / carbon paper composite electrode material and a preparation method thereof, belonging to the technical field of a super-capacitor electrode material. The material adopts carbon paper as a matrix (a current collector), a manganese dioxide nano sheet is attached to the surface of the carbon paper, the length of the manganese dioxide nano sheet is 150 to 200 nm, and the thickness of the manganese dioxide nano sheet is 5 to 15 nm. The preparation method comprises the following steps of: firstly sufficiently and uniformly mixing potassium permanganate, ammonium fluoride and deionized water according to a given ratio to obtain a mixed system, immersing the carbon paper in the mixed system, performing the reaction, and finally washing and drying a reaction product. The preparation method is simple, rapid and capable of realizing the mass production; the obtained composition material is controllable in size, regular in shape, good in electrochemical performance, particularly high in capacitance and good in cycling performance, the solves the technical problems of the prior art that the structure is unstable and the multiplying power performance is poor, and is particularly suitable for a super-capacitor material; in addition, the composite material can also be applied to a flexible device.

The invention provides a method for preparing an acid liquid system. The method comprises the following steps: 1) adding a thickening agent into a hydrochloric acid solution at a first stirring speed,and stirring at a second stirring speed to obtain a first acid liquid; 2) sequentially adding an iron ion stabilizer, a corrosion inhibitor and a demulsification cleanup additive into the first acidliquid, uniformly stirring at a third stirring speed, and standing to obtain a base solution; and 3) adding a tackifier into the base solution, and stirring at a fourth stirring speed to obtain the acid liquid system.

The invention discloses a 2,3-condensed ring indoline derivative and a synthesizing method and application thereof. The 2,3-condensed ring indoline derivative disclosed by the invention has a structure shown in the following formula (I). The synthesizing method of the 2,3-condensed ring indoline derivative mainly comprises the following steps: taking a compound shown in the following formula (II), putting into an organic solvent, and reacting in the presence of oxygen to obtain a target crude product. The synthesizing method of the derivative disclosed by the invention has easiness in control, short period and higher yield and avoids anhydrous and anaerobic conditions; furthermore, a part of the 2,3-condensed ring indoline derivative has certain antitumor activity. The compound of the structure shown by the formula (I) and the compound of the structure shown by the formula (II) are respectively shown in the specification.

The invention provides a synthesis method of tetracarboxylic dianhydride with a fluorinated rigid structure. According to the method, trifluoromethanesulfonic acid, trifluoroacetic acid and / or sulfuric acid is adopted to replace hydrofluoric acid to serve as a catalyst to achieve conversion from 3,4-dimethylphenol or 3,3',4,4'-tetramethyldiphenyl ether to xanthene tetracarboxylic dianhydride, so that the whole synthesis method has the advantages of being efficient, safe and controllable.

The invention relates to a preparation method of a silica bonding sulfur-containing terminal group PAMAM dendrimer adsorption agent. The method comprises the steps of loading PAMAM by utilizing generation-0 silica, generation-1.0 silica or generation-2.0 silica, adopting 100 to 300 mL of anhydrous alcohol as a solvent, adding methyl-isorhodanate, heating and stirring for reaction, cooling to 25 DEG C after the reaction is completed, filtering to obtain a product, transferring the product into a Soxhlet extractor, extracting for at least 12 hours by utilizing anhydrous alcohol, carrying out vacuum drying for 48 to 72 hours so as to obtain a generation-0, a generation-1.0 or a generation-2.0 silica bonding sulfur-containing terminal group PAMAM dentrimer adsorption agent. The prepared adsorption agent adopts silica as a carrier and the sulfur-containing terminal group PAMAM dendrimer as a functional group, is good in adsorption effect on Hg(II) and can be widely used for removing, selectively adsorbing and concentrating and recycling the Hg(II) ions in water.

The invention belongs to the technical field of batteries, and particularly discloses a nitrogen-doped defect-rich molybdenum disulfide catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing a precursor material by taking ammonium molybdate and thiourea as raw materials through a hydrothermal method, and then preparing a nitrogen-doped defect-rich molybdenum disulfide catalyst material N-MoS2 with a three-dimensional porous nano flower-shaped structure through subsequent heat treatment based on an atmosphere generated by urea decomposition. The invention provides a new way for efficient and controllable preparation of the heteroatom-doped molybdenum disulfide-based nano electrocatalyst material.

The invention relates to a method for preparing a delayed coagulation type super plasticizer through atom transfer radical polymerization. The method comprises the steps of with a delayed coagulationtype monomer and a carboxylic acid small monomer as main reaction raw materials, sequentially carrying out atom transfer radical polymerization (ATRP), alcoholysis and copolymerization so as to prepare the delayed coagulation type super plasticizer, namely that carrying out atom transfer radical polymerization (ATRP) on the delayed coagulation type monomer as a reactant under the system formed byan unsaturated initiator, transition metal halide and a ligand so as to obtain an unsaturated macromonomer, carrying out alcoholysis so as to obtain a delayed coagulation type macromonomer, and copolymerizing with the carboxylic acid small monomer, so as to obtain the delayed coagulation type super plasticizer. According to the method, a functional side chain consisting of delayed coagulation typestructural monomers is innovatively designed and synthesized by virtue of a controllable polymerization technical measure, a traditional polymer side chain structure is replaced, the super plasticizer presents excellent capacities of dispersing element purified slurry, and the coagulation time of the element purified slurry can be remarkably delayed, so that the later-period strength of concreteis improved, and multiple effects of high water reduction, slump resistance and delayed coagulation are achieved.

The invention belongs to the technical field of advanced nano materials and in particular discloses a method for synthesizing a large-aperture mesoporous bimetallic oxide semiconductor gas-sensitive material on the basis of acid-base pairs. The method comprises the following steps: by taking an amphiphilic block copolymer as a template agent, and a metal alkoxide and a metal chloride as two metaloxide precursors, enabling the precursors to react with a hydrophilic segment of the template agent through hydrogen bonds under a coordination function in a synthesis system of a polar organic solvent, and performing solvent volatilization induction co-assembling and calcining at different steps with an inert atmosphere firstly and an air atmosphere later, so as to obtain a large-aperture mesoporous bimetallic oxide semiconductor material. By adopting the method, materials such as a p-n junction semiconductor, a p-p junction semiconductor and an n-n junction semiconductor can be synthesized,and in addition, the synthetic materials have highly ordered mesoporous structures, large apertures and large specific surface areas. The method can be applied to gas sensation, and has very good sensitivity and selectivity and very short response and recover time upon small molecule gases such as CO, H2 and CH4 or one or more of VOCs (volatile organic compounds) such as ethanol, acetone and methylbenzene.

The invention provides a preparation method of nanocluster composite substrate AuNPs@ (SG) X used for detecting Pb<2+> by aggregation-induced emission, and belongs to the technical field of analysis and detection. The method includes the steps of (1) mixing HAuCl4 aqueous solution with GSH solution, adding ultrapure water to the mixed solution, and stirring the mixed solution at a certain temperature to form floc precipitation; (2) adjusting the pH value of the mixed solution to 5-6, making the precipitation completely dissolved and the mixed solution clear and transparent; (3) after aging the mixed solution for 1.5-3 h, adjusting the pH value of the mixed solution to 7.2-8.5 to obtain the nanocluster composite substrate AuNPs@ (SG) X. The preparation method adopts the direct reaction of HAuCl4 and GSH to prepare the AuNPs@ (SG) X in one step, and the synthesis method is simple and controllable. The nano Au-ion of the nanocluster composite substrate AuNPs@ (SG) prepared by the method is well dispersed to almost not overlap and aggregate, and the synthetized composite substrate mixed solution presents colorless, clear, transparent and stable under the visible light; moreover, the composite substrate prepared by the method has the advantages of strong selectivity and no self-fluorescence, and is favorable for further inducing metal ions to produce aggregation emission, and studying high sensitivity sensing.

The invention discloses a novel synthesis method of bromfenac sodium, which belongs to the technical field of drug synthesis, and is characterized in that the preparation method comprises the following steps of taking o-aminophenylacetic acid as an initial raw material, and obtaining an intermediate I through acylation reaction, performing sulfonation reaction on the intermediate I to obtain an intermediate II, carrying out substitution reaction on the intermediate II and p-bromobenzoyl chloride to obtain an intermediate III, hydrolyzing the intermediate III to obtain bromfenac, and reacting bromfenac with sodium hydroxide to obtain the final product bromfenac sodium. The method has the beneficial effects that the generation of impurities containing indole rings caused by a synthesis method in the prior art is avoided; the problem that in the prior art, phosphoric acid or glacial acetic acid is used for producing acid salt, so that the pH value of a final finished product exceeds the standard is solved, the quality problem that the water content is too low due to the proportion of materials for preparing the bromfenac sodium finished product is solved, and meanwhile, the synthesis method is simple, easy to control and suitable for industrial production.

The invention discloses a 1,2,8-oxo azacyclononane-9-thioketone derivative, and a synthetic method and applications thereof. The structure of the 1,2,8-oxo azacyclononane-9-thioketone derivative is represented by formula I. According to the synthetic method, a compound represented by formula II and a compound represented by formula III are introduced into an organic solvent, in the presence of oxygen, reaction is carried out so as to obtain a target crude product. The synthetic method is simple and convenient to control; the period is short; no waterless anoxic conditions are required; the formula I, II, and III are disclosed in the invention, wherein R1 is used for representing phenyl, R2 is used for representing phenyl, R3 and R4 are used for representing structures disclosed in the invention, R5 is used for representing hydrogen atom, R6 is used for representing 4-trifluoromethyl benzyl, and X is used for representing sulfur atom.

The invention relates to a synthetic method of a side-chain adsorption type concrete super-plasticizer. By using an unsaturated monomer, an unsaturated initiator, a transition metal complex, a carboxylic small monomer and the like as main raw materials and through the method of auto-polymerization, hydrolysis and graft copolymerization, the side-chain adsorption type concrete super-plasticizer issynthesized. The synthetic method specifically comprises the following steps: the unsaturated monomer, which is used as a reactant, is subjected to atom transfer radical polymerization (ATRP) in an initiating system composed of the unsaturated initiator, transition metal halide and a ligand so as to obtain an unsaturated macromonomer; then, the macromonomer is subjected to hydrolysis to obtain ananionic macromonomer; and the anionic macromonomer and the carboxylic small monomer are subjected to radical graft copolymerization under the action of an initiator and a chain transfer agent to prepare the side-chain adsorption type concrete super-plasticizer. The synthetic method of the invention has controllable process and simple step, is convenient and efficient, and is energy-saving and environmentally-friendly. Through innovative design of the molecular structure, the side-chain adsorption type concrete super-plasticizer is synthesized, multiple excellent effects of water reduction andslump retaining and the effect of inhibiting side effect of clay are realized, and the types of the concrete super-plasticizer are enriched.

The invention discloses a preparation method of a dual-emission quantum dot and an application of the dual-emission quantum dot in biological imaging, wherein the dual-emission quantum dot is prepared by taking zinc acetate (Zn(Ac)2), silver nitrate (Ag(NO)3), indium acetate (In(Ac)3) and selenium powder (Se) as main raw materials as a core of the quantum dot, taking zinc acetate (Zn(Ac)2) and sulfur powder as a precursor solution as a shell layer of the quantum dot, and preparing the reaction product at a certain temperature under the protection of nitrogen. The prepared dual-emission quantum dot is high in quantum yield and good in stability, has two emission peaks of visible light region emission and near-infrared region emission, and can be used for in-vivo and in-vitro biological imaging.

A method for preparing a macro-monomer synthesized polycarboxylate water reducer through alcoholysis of alkenyl-acyl chloride belongs to the field of water reducers. The method comprises the following steps: firstly polymerizing a cationic chain, and then reacting with the alkenyl-acyl chloride, thus obtaining a macro-monomer; then carrying out copolymerization on the macro-monomer and a carboxylic acid micro-monomer, i.e., polymerizing under an oxidization-reduction initiating system formed by high-valence cerate and alcohols by taking an unsaturated cationic quaternary ammonium salt monomer as a reactant, thus obtaining a terminal hydroxyl cationic long chain; then respectively enabling the terminal hydroxyl cationic long chain and polyethylene glycol monomothyl ether to react with the alkenyl-acyl chloride respectively, thus preparing macro-monomers with different structures; then carrying out free radical polymerization on the macro-monomers and unsaturated carboxylic acid micro-monomers, thus obtaining the macro-monomer composite polycarboxylate water reducer. According to the method disclosed by the invention, the macro-monomers with different structures and functions are successfully synthesized through ways of polymerizing the cationic chain and respectively reacting with the alkenyl-acyl chloride by combining polyether, and a novel comb-structure polycarboxylate water reducer which takes a polycarboxyl acid as a main chain and the cationic long chain and the polyether as polybasic side chains can be finally obtained. A reaction technology is simple and easy, and multiple excellent effects of retaining slump through reducing water, resisting clay, and the like are realized.