154 results about "Octadecene" patented technology

The invention provides a protein for synthesizing an octadecene compound and a method for synthesizing the octadecene compound. Relates to the field of enzymology. The amino acid sequence of the protein has more than 95% of consistency with the sequence as shown in SEQ ID No.3. The protein, hexadecanoic acid specific thioesterase, Z11 desaturase, gene silencing suppressor and vegetable fat synthesis related transcription factors are jointly expressed in plants and can be used for synthesizing (Z)-13-octadecenoic acid.

The invention relates to the technical field of rubber asphalt, in particular to a pavement rubber asphalt crack pouring adhesive and a preparation method thereof. The pavement rubber asphalt crack pouring adhesive is prepared from the following components in parts by mass: asphalt, rubber powder, a compatilizer, modified silicon dioxide, a silane coupling agent and an auxiliary agent, according to the pavement rubber asphalt crack pouring adhesive, asphalt, rubber powder and modified silicon dioxide are compounded; the preparation method comprises the following steps: treating nano silicon dioxide by adopting a KH570 silane coupling agent, introducing unsaturated double bonds into the nano silicon dioxide, then carrying out free radical polymerization on the nano silicon dioxide, alpha-octadecene and sulfobetaine methacrylate under the catalysis of BPO, and respectively introducing long-chain alkyl, sulfo and betaine groups into the modified nano silicon dioxide, so as to obtain the modified nano silicon dioxide. The interfacial compatibility among the components is improved, so that the high-temperature stability and the mechanical property of the crack pouring adhesive are improved.

The invention discloses a solution-treatable linear polarization low-threshold polarization laser light source and a preparation method thereof, and the preparation method comprises the following steps: mixing cesium carbonate and oleic acid, heating to 100-130 DEG C in an inert atmosphere, carrying out heat preservation for 20-40 min, after reactants are completely dissolved, heating to 140-160 DEG C, and carrying out heat preservation for 10-30 min to obtain a precursor solution A; mixing the precursor solution A, erbium acetate, yttrium acetate, bismuth acetate, silver acetate, sodium oleate, octadecene, 4-chlorobutyric acid and oleylamine according to a set proportion, standing for a set time in an inert atmosphere, stirring and heating to 90-110 DEG C, preserving heat for 0.5-1.5 h, heating to 130-150 DEG C after reactants are completely dissolved, injecting benzoyl chloride, reacting for 1-5 minutes, cooling, and stopping reaction; carrying out solid-liquid separation on the obtained mixed solution, cleaning the quantum dots, then dispersing the quantum dots in a dispersing solvent, adding PHPS into the dispersing solvent, and carrying out ultrasonic mixing; and after the PHPS is fully hydrolyzed, coating a silicon oxide sheet with the solution to prepare a film.

The invention relates to the technical field of intermetallic compound catalysts, and particularly discloses a preparation method of a hexagonal layered Pt-Bi intermetallic compound nanocrystalline catalyst, which comprises the following steps: weighing octadecene and oleylamine, and mixing to obtain a solution A; platinum acetylacetonate, bismuth acetate, ascorbic acid and hexadecyl trimethyl ammonium bromide are weighed and sequentially poured into the solution A, and a solution B is obtained through mixing and ultrasonic treatment; heating and preserving heat of the solution B, and naturally cooling to room temperature to obtain a turbid liquid C; and measuring cyclohexane and ethanol, sequentially pouring into the turbid liquid C, carrying out ultrasonic treatment at room temperature for 3 minutes, then pouring out supernate, repeating for 2-3 times, collecting a product, and drying to obtain the nanocrystalline catalyst. According to the invention, the electron interaction between bimetallic components is utilized, the electron structure of a catalytic active center is optimized, the interaction between the active structure and reaction active species is enhanced, the evolution kinetics of a plurality of reaction intermediates such as * O and * OOH in the electrocatalytic oxygen reduction reaction can be obviously accelerated, and the kinetics rate of the four-electron oxygen reduction reaction is improved.

The invention provides an acid response magnetic particle imaging probe and a preparation method and application thereof.The preparation method comprises the steps that S1, a magnetic core, an iron precursor and long-chain alcohol diol are dispersed in a mixed solution of oleic acid, oleylamine, cyclohexane and octadecene, a reaction is conducted for 30-90 minutes under the inert atmosphere condition of 200-300 DEG C, a first non-polar solvent is used for washing, precipitation and centrifugation, and a first non-polar solvent is obtained; the oil-phase double-magnetic core-shell nanoparticles are obtained; s2, preparing water-phase aminated double-magnetic core-shell nanoparticles from the oil-phase double-magnetic core-shell nanoparticles and polymers with amino groups by adopting a film dispersion method or a nano coprecipitation method; s3, the aqueous-phase aminated double-magnetic core-shell nanoparticles and a compound with multiple aldehyde groups are subjected to an aldehyde-amine condensation reaction, a stable imine bond mediated nanometer assembly structure is formed, and the acid response magnetic particle imaging probe is obtained. The probe provided by the invention can respond to the change of the acid microenvironment, has high sensitivity, low background noise and a relatively strong imaging effect, and is suitable for dynamically monitoring diseases related to the acid microenvironment in real time.

The invention relates to a preparation method and application of surface passivation red light perovskite quantum dots, and the preparation method comprises the following steps: preparing a monovalent cation precursor from cesium carbonate, oleic acid and 1-octadecene; preparing a lead source precursor from the thiophene-sulfonamide ligand, lead halide, zinc halide, oleylamine, oleic acid and 1-octadecene; thermally injecting the monovalent cation precursor into the lead source precursor, and cooling to prepare a perovskite quantum dot solution; performing anti-solvent purification on the perovskite quantum dot solution to obtain surface passivation red light perovskite quantum dots; the invention also discloses application of the surface passivation red light perovskite quantum dot prepared by the preparation method in preparation of an electroluminescent diode. According to the invention, the purpose of preparing the halogen perovskite quantum dot with excellent optical performance, good stability and excellent performance of the prepared electroluminescent diode is achieved.

The invention relates to the technical field of dye preparation data processing, in particular to a liquid disperse dye suitable for high-temperature and high-pressure dyeing and a preparation method thereof.The dye comprises a composite dye matrix, a dispersion stabilizing system and a solvent medium, disperse black dye is formed by compounding disperse purple 93, disperse orange 288 and disperse blue 291 in the ratio of 1, and the disperse black dye is a liquid disperse dye suitable for high-temperature and high-pressure dyeing. And a nano-scale dispersion system is constructed by combining the synergistic effect of hexadecylamine / octadecylamine polyoxyethylene ether and lauryl amine polyoxyethylene ether. According to the preparation method, on the basis of a dynamic behavior prediction model, micelle formation dynamic data in a premixing stage, viscosity and particle size associated data in a shearing stage and thixotropic index change data in a homogenizing stage are integrated, and a surfactant proportion optimization instruction is generated; according to the invention, the stability of the dispersoid structure is controlled, the dyeing uniformity and color fastness are improved, and the wastewater COD discharge load and the production cost are reduced.

The invention discloses an all-inorganic perovskite nanocrystalline composite material and a preparation method and application thereof, and belongs to the technical field of luminescent materials. The preparation method comprises the following steps: mixing lead bromide and octadecene, carrying out first heat treatment, adding oleic acid and oleylamine, and carrying out second heat treatment to obtain a lead bromide precursor solution; mixing and reacting the lead bromide precursor solution with the cesium oleate solution, and cooling to obtain an all-inorganic perovskite nanocrystalline mixed solution; and mixing the full-inorganic perovskite nanocrystalline mixed solution with zinc stearate and dodecanethiol for reaction, centrifuging, and removing the solvent to obtain the full-inorganic perovskite nanocrystal. The preparation method is easy to operate, high in reproducibility, clean, free of pollution and suitable for large-scale production, the effective component of the prepared all-inorganic perovskite nanocrystalline composite material is a heterojunction structure composite material attached with zinc sulfide microspheres, the stability is good, the photoluminescence intensity is high, the sensitivity to pressure is high, and the application prospect is wide. Meanwhile, excellent sensitivity is also realized under low pressure.

The invention relates to the technical field of semiconductor materials, and discloses a preparation method of band-gap-adjustable high-quality ZnInGa / CuInS / ZnS / ZnS colloidal quantum well nanocrystals, which comprises the following steps: synthesizing ZIGS quantum dots, mixing a zinc precursor, an indium precursor, a gallium precursor, a sulfur precursor, organic acid, organic amine and 1-octadecene, degassing, and heating to synthesize ZIGS nanocrystals; mixing the ZIGS nanocrystal, organic amine and 1-octadecene, degassing, heating, and injecting a copper, indium and sulfur precursor solution to obtain a ZIGS / CIS nanocrystal; mixing the ZIGS / CIS nanocrystal, organic amine and 1-octadecene, degassing, heating, adding a zinc oleate aqueous solution and the sulfur precursor solution a, reacting, and purifying to obtain the ZIGS / CIS / ZnS colloidal quantum well nanocrystal. And repeating the preparation steps of the ZIGS / CIS / ZnS colloidal quantum well nanocrystal to obtain the ZnInGaS / CuInS / ZnS / ZnS colloidal quantum well nanocrystal. According to the cadmium-free ZnInGa / CuInS / ZnS / ZnS colloidal quantum well nanocrystal prepared by the method, the optimal quantum yield is greater than 99%, and the luminescence peak position is tunable in the range of 533-742 nm.

The invention relates to a preparation method of surface-passivated red-light perovskite quantum dots, which comprises the following steps: preparing an amine sulfate solution from primary amine, sulfuric acid and an organic solvent; preparing a monovalent cation precursor from at least one of cesium carbonate, methylamine and formamidine, oleic acid and 1-octadecene; preparing a lead source precursor from lead halide, zinc halide, oleylamine, oleic acid and 1-octadecene; and thermally injecting the monovalent cation precursor into the lead source precursor, cooling, and injecting an amine sulfate solution to prepare a surface passivation red light perovskite quantum dot solution. The purpose of preparing the halogen perovskite quantum dots with excellent optical performance and good stability is achieved.

The invention relates to the field of luminescent carbon nanomaterials, in particular to a water-soluble carbon dot-based afterglow luminescent material based on a multi-carboxyl carbon source and a preparation method of the water-soluble carbon dot-based afterglow luminescent material. The preparation method comprises the following steps: step 1, uniformly mixing a Y (CH3CO2) 3 solution, oleic acid and 1-octadecene according to a formula ratio; 2, heating to 120-160 DEG C, reacting for 20-50 minutes, then cooling to 40-60 DEG C, preserving heat, and adding a NaOH methanol solution and an NH4F methanol solution; step 3, adding organic acid, wherein the organic acid contains at least two carboxyl groups; and 4, heating to 90-120 DEG C, vacuumizing, then heating to 280-320 DEG C, reacting for 1-3 hours in a nitrogen atmosphere, naturally cooling to room temperature, and carrying out post-treatment to obtain the water-soluble CDs (at) NaYF4 composite material. According to the preparation method, the water-soluble carbon dot-based afterglow luminescent material based on the multi-carboxyl carbon source, which is stable in structure and good in dispersity, can be prepared, and the water-soluble carbon dot-based afterglow luminescent material has the advantages of long service life and wide application range.

The invention relates to a double-coordination passivated red-light perovskite quantum dot and a preparation method and application thereof. The preparation method comprises the following steps: preparing a monovalent cation precursor from cesium carbonate, 1-octadecene and oleic acid; preparing a lead source precursor from lead halide, zinc halide, 1-octadecene, diisooctyl hypophosphorous acid and oleylamine; thermally injecting the monovalent cation precursor into the lead source precursor, and cooling to prepare a perovskite quantum dot solution; performing anti-solvent purification on the perovskite quantum dot solution to obtain red light perovskite quantum dots; a process of preparing a double-coordination passivated red light perovskite quantum dot from the red light perovskite quantum dot and taurosulfonamide hydrochloride; the invention also discloses an application of the double-coordination passivated red light perovskite quantum dot prepared by the preparation method in preparation of an electroluminescent diode. The post-treatment passivation operation method is simple and convenient, and the quantum dot treated by the double-coordination ligand achieves the purpose of preparing the halide perovskite quantum dot with excellent optical performance and excellent performance of the prepared electroluminescent diode.

The application belongs to the technical field of optical materials, and particularly discloses a synthesis method of core-shell quantum dots based on surface activation, which comprises the following steps: S1, preparing a quantum dot core; S2, degassing reaction is carried out on zinc precursor, octadecene and oleylamine in proportion, then the quantum dot core obtained in S1 is injected, a metal alkyl compound is added, and the temperature is increased to 230-250 DEG C; S3, the shell precursor is injected for 3-4 times, the temperature is increased at the same time, the inner shell is grown, zinc stearate and TOP-S are injected again, the ZnS shell is grown, and the InP core-shell quantum dots with regular morphology are obtained. The synthesis method of core-shell quantum dots based on surface activation is adopted, the quantum dots with controllable morphology and size distribution are obtained, the method is suitable for industrial production, and has wide applicability.

The invention provides a high-flash-point alkyd resin, an alkyd antirust paint composition as well as related products, a preparation method and application thereof, and belongs to the technical field of antirust paint. The high-flash-point alkyd resin disclosed by the invention is prepared from the following raw materials in parts by weight: 130 to 150 parts of polyol, 50 to 100 parts of enzymolysis cottonseed oil, 200 to 300 parts of oleic acid, 200 to 280 parts of hyodeoxycholic acid, 210 to 230 parts of phthalic anhydride, 20 to 40 parts of S-1500 # solvent oil, 15 to 30 parts of octadecene and 225 to 255 parts of trimethylbenzene. The high-flash-point alkyd resin provided by the invention can be used for preparing a paint coating which is faster in dryness and better in thick coating effect and anti-rust and anti-corrosion effects.

The invention discloses an ultraviolet-assisted silicon-coated perovskite quantum dot and a preparation method thereof, and belongs to the technical field of nano materials, and the ultraviolet-assisted silicon-coated perovskite quantum dot is prepared from lead bromide, octadecene, oleic acid, oleylamine, silane and a cesium source through a series of operation steps. According to the ultraviolet-assisted silicon-coated perovskite quantum dot and the preparation method thereof, the required raw materials are simple, the reaction condition is mild, the reaction is rapid, the product generation efficiency is high, the prepared perovskite quantum dot is small in size, silicon coating is complete, the crystallinity is excellent, the fluorescence performance is excellent, and the stability is improved.

The invention discloses a strontium chloride-assisted method for improving the fluorescence quantum yield of manganese-doped CsPbCl3 quantum dots, which comprises the following steps: adding cesium carbonate into octadecene, heating and stirring until uniform mixing, and injecting oleic acid to obtain a cesium oleate solution; the preparation method comprises the following steps: adding different amounts of strontium chloride auxiliary dopant, manganese chloride dopant, lead chloride, oleylamine and oleic acid into octadecene, heating and stirring to uniformly mix to obtain a precursor mixed solution; injecting the cesium oleate solution into the precursor mixed solution, reacting for a certain period of time, and cooling in ice water to room temperature to form a CsPbCl3 quantum dot stock solution; a certain proportion of a flocculating agent is added into the stock solution, and a CsPbCl3 quantum dot solution is obtained through centrifugal treatment. According to the preparation method disclosed by the invention, the quantum yield of Mn-emitted fluorescence of the Mn-doped CsPbCl3 quantum dot is improved by regulating and controlling the addition amount of the doping agent, and finally, the quantum yield of Mn-emitted fluorescence of the Sr and Mn co-doped CsPbCl3 quantum dot reaches up to 100%.

The invention provides a Fe-Co-Ni series nano-alloy and a preparation method and application thereof, and belongs to the technical field of functional materials. The alloy is prepared by the following steps of: weighing and proportioning 0.5 mmol of each element by taking chlorate or acetylacetonate or acetate of iron, cobalt, nickel, manganese, copper, zinc and the like with the purity of more than 99.5% and other metal chlorides which are rich in earth surface and economical and practical as precursors, putting the precursors into a pressure-resistant bottle, taking n-trioctylphosphine oxide (TOPO) as a ligand, taking ethanol and 1-octadecene (ODE) as a mixed solvent, and uniformly stirring to prepare the alloy. And synthesizing the hexagonal nano-alloy at low temperature by using a wet chemical method. The method can be used for synthesizing 3-10-element medium-entropy and high-entropy alloy, and has a wide application prospect. The synthesis is a precise process which is guided by an organic ligand, is coordinated by multiple metals and is subjected to nucleation-self-assembly-anisotropic growth.

The invention relates to the technical field of chemical pesticides, in particular to a synthesis method of phyllocnistis appendiculata sex pheromone. According to the synthesis method of the phyllocnistis appendiculata sex pheromone, provided by the invention, the synthesis steps are simplified, the yield of most reactions is 90% or above, the synthesis method is simple and convenient, a target product can be obtained in the shortest time, the phyllocnistis appendiculata sex pheromone (10R, 14R)-10, 14-dimethyl octadecene is prepared through 14-step reactions, and the total yield is 38.5%; according to the method, the phyllocnistis appendiculata sex pheromones (5R, 9R)-5, 9-dimethyl octadecane and (5R, 9R)-5, 9-dimethyl heptadecane are prepared through a reaction in 12 steps, and the total yields are 52.8% and 52.3% respectively.

This invention discloses a phosphorus-free composite polyamine boiler water treatment agent, its preparation method, and its application, belonging to the fields of chemical and water treatment technology. The water treatment agent is made from the following raw materials in parts by weight: 9-15 parts diethylenetriamine, 1-6 parts N-9-octadecene-1,3-propanediamine, 18-20 parts tannin, 1-6 parts cyclohexylamine, 10-24 parts polycarboxylic acid, and 30-60 parts deionized water. In preparation, the polycarboxylic acid is dissolved in deionized water, and N-9-octadecene-1,3-propanediamine, cyclohexylamine, diethylenetriamine, and tannin are added sequentially. After stirring at room temperature, the mixture is allowed to stand. The water treatment agent of this invention is phosphorus-free and has the functions of scale inhibition, corrosion inhibition, passivation, pre-filming, deoxygenation, desiliconization, scale dispersion and online removal of steam turbine salt deposits. It has a scale inhibition rate of ≥98%, a corrosion inhibition rate of ≤0.025mm / a and a deoxygenation efficiency of ≥97%. It can be adapted to high-pressure, subcritical and supercritical power plant boilers, is easy to prepare and suitable for industrial application.

This application relates to a method for preparing Mn-doped CsPbBr3 nanowires. The method comprises: 1) injecting a cesium oleate precursor solution into a mixed solution A, dispersing the resulting precipitate by centrifugation in an oil-phase solvent, and obtaining a CsPbBr3 nanowire seed solution; 2) injecting the CsPbBr3 nanowire seed solution into a mixed solution B to form Mn-doped CsPbBr3 nanowires, cooling the solution, and centrifuging the resulting precipitate. Mixed solution A is prepared by mixing octadecene, oleic acid, oleylamine, and lead bromide, heating the mixture until the lead bromide is fully dissolved, and then cooling the mixture; mixed solution B is prepared by mixing octadecene and manganese bromide and heating the mixture under an inert gas atmosphere. This method provides sufficient thermal energy for the dopant while minimizing Ostwald maturity, allowing the dopant to diffuse into the crystal without the use of highly corrosive acids. While maintaining the nanowire's shape anisotropy and overall dimensional uniformity, it can produce nanowires with ultra-small diameters, making it an effective method for synthesizing Mn-doped CsPbBr3 nanowires.

The invention belongs to the technical field of fuel cells, and particularly relates to a platinum-based alloy electrocatalyst for enhancing a built-in electric field based on heterogeneous transformation as well as a preparation method and application of the platinum-based alloy electrocatalyst. The preparation method comprises the following steps: dissolving a soluble platinum salt, a soluble palladium salt, a soluble tin salt and a soluble bismuth salt in a mixed solvent of oleylamine and 1-octadecene, then adding ascorbic acid, and ultrasonically mixing uniformly; the platinum-based alloy electrocatalyst is prepared by the following steps: putting the platinum-based alloy into an oil bath for heating, carrying out two-step heating reaction, washing, centrifuging and collecting, loading activated carbon, and then carrying out electrochemical reconstruction to obtain the platinum-based alloy electrocatalyst based on the heterogeneous transformation enhanced built-in electric field. According to the platinum-based alloy electrocatalyst, a simple wet chemical method is adopted, the prepared platinum-based alloy electrocatalyst for enhancing the built-in electric field based on heterogeneous transformation is subjected to heterogeneous transformation, and the built-in electric field is enhanced, so that the platinum-based alloy electrocatalyst has excellent catalytic activity, toxicity resistance and stability, and has wide application prospects in the fields of ethanol electrocatalysis and fuel cells.

The invention relates to a high-crystallization mercury-based II-VI group nanocrystal synthesis method based on an octadecene-amine mixed solvent. The method comprises the following steps: providing a mercury-containing compound as a mercury source; providing a precursor solution capable of releasing II-VI group element anions; octadecene and an amine-containing surfactant are mixed in proportion to serve as a reaction solvent; injecting the precursor solution into a reaction solvent containing a mercury source in an inert atmosphere, and reacting under the condition that the temperature is lower than the thermal injection temperature to generate the mercury-based II-VI group nanocrystal with small size and higher crystal quality; and cooling and purifying the reaction product to obtain the target nanocrystal. By mixing the non-polar solvent and the amine surfactant, the concentration of the surfactant is reduced, the growth rate of the crystal is slowed down, the low-temperature controllable reaction is realized, the nanocrystal of which the particle size is 2-5nm and the crystal quality is remarkably improved is obtained, and the half-peak width of an X-ray diffraction pattern can be less than 0.7 degree (2 theta). The problems that the crystal size is difficult to control and the crystal quality is insufficient in a traditional method are solved.

The embodiment of the present application relates to the technical field of functional materials, and specifically discloses a CuInS2-In2S3 nano-heterojunction catalyst and a preparation method and application thereof, the CuInS2-In2S3 nano-heterojunction catalyst is prepared by using indium chloride, octadecene, oleylamine, sulfur powder and appropriate Cu 1.94 S nanocrystals as raw materials, nucleating In2S3 particles on the Cu 1.94 S nanocrystals through heating reaction, the catalyst has stable structure and stable product performance, exhibits good carbon dioxide reduction catalytic activity, and greatly improves the CO2 reduction product selectivity of CuInS2, thereby solving the problems that the product selectivity of CuInS2 is low in the CO2 reduction, and the small current density limits the catalytic activity and application in the catalytic process in the prior art. Moreover, the preparation method provided by the embodiment of the present application has high controllability, and is simple and efficient compared with the method in the prior art, and has a wide market prospect.

The present invention provides: a method for producing Fe2C nanoparticles, by which Fe2C nanoparticles are produced by a simple process by a one-step reaction; and a reduction catalyst which comprises Fe2C nanoparticles. The present invention relates to a method for producing Fe2C nanoparticles, the method including heating and mixing an iron carbonyl compound, a halide, a boron compound, and an alkylamine under an inert gas atmosphere, wherein the iron carbonyl compound comprises Fe3(CO)12 or Fe2(CO)9, the boron compound comprises a diboron compound that contains a heterocyclic ring represented by general formula (I) (wherein the description of the symbols is omitted), and 1-octadecene is not used. The temperature during the heating and mixing is preferably 80°C or higher and lower than 350°C. The time of the heating and mixing is preferably 2.5-50 hours.

This invention discloses a sex pheromone antagonist for the poplar leafminer moth and its application. The active ingredient of the sex pheromone antagonist is cis-13-octadecene-15-ynyl alcohol. The sex pheromone antagonist of this invention can interfere with the orientation of male poplar leafminer moths towards females, causing males to become disoriented, thereby reducing the probability of encounters between males and females, interfering with mating, reducing the reproductive rate, and gradually controlling the extinction of the pest population, thus achieving the purpose of pest control. This invention can significantly reduce the damage caused by the poplar leafminer moth and is also environmentally friendly.

The invention belongs to the technical field of optical materials, and particularly discloses a surface activation-based core-shell quantum dot synthesis method which comprises the following steps: S1, preparing a quantum dot core; s2, mixing a zinc precursor, octadecene and oleylamine according to a ratio, carrying out a degassing reaction, then injecting the quantum dot core obtained in S1, adding a metal alkyl compound, and heating to 230-250 DEG C; and S3, injecting the shell layer precursor for 3-4 times, simultaneously heating, growing an inner shell, injecting zinc stearate and TOP-S, growing a ZnS shell, and obtaining the InP core-shell quantum dot with regular morphology. According to the method for synthesizing the core-shell quantum dots based on surface activation, the quantum dots with controllable morphology and size distribution are obtained, and the method is suitable for industrial production and has wide applicability.

The invention relates to the technical field of semiconductor materials, and discloses a method for preparing ultraviolet luminescent Ga-containing nanocrystals with adjustable band gap, comprising the following steps: S1: adding a zinc precursor, an indium precursor, a gallium precursor, a sulfur precursor, an organic amine and 1-octadecene into a three-necked flask and mixing them evenly; S2: initial reaction: heating and maintaining the mixture under nitrogen protection to form ZnInGaS (ZIGS) Magic Size Clusters (MSCs); gradually increasing the reaction temperature and maintaining it to promote the conversion of MSCs into ZnInGaS nanocrystals; S3: precipitation and purification of nanocrystals; S4: purifying by centrifugation to obtain ZIGS / ZnGaS nanocrystals with transition shells; S5: further growing a ZnS shell, precipitating the nanocrystals with acetone or ethanol solvent, and repeatedly washing to obtain purified ZIGS / ZnGaS / ZnS nanocrystals. By adjusting the stoichiometric ratio of zinc, indium and gallium in the precursor, the band gap of ZIGS nanocrystals can be precisely controlled, making the nanocrystals suitable for optoelectronic devices in different wavelength ranges, especially ultraviolet optoelectronic applications.

The present invention relates to the compound 2-hydroxy-octadecene-9-cis-oate for use in the treatment of oncological pathologies including grade IV glioblastoma with native IDH, grade 3 glioma, embryonal tumour, pituitary tumour, meningioma, haemangiopericytoma, haemangioblastoma, mesothelioma, bile duct adenocarcinoma, exocrine pancreatic cancer, neuroendocrine pancreatic cancer, rectal cancer, urachal cancer, adenocarcinoma of the bladder and oesophageal cancer, and for the treatment of neuropathic pain caused by diabetic peripheral neuropathy, spinal cord injury, post-herpetic neuralgia, chemotherapeutic agent, antitumour agent, cancer, fibromyalgia or hepatitis. The present invention also relates to the pharmaceutical composition comprising 2-hydroxy-octadecene-9-cis-oate.

The present application relates to the technical field of oil and gas field exploitation, and specifically to a drag reducer for oil and gas gathering and transportation and its application, comprising a first polymer molecule and a second polymer molecule, wherein the first polymer molecule and the second polymer molecule are bonded by intermolecular association; the first polymer molecule comprises the following preparation raw materials: hexadecyl methacrylate, ethylene glycol mono-9-octadecene-1-ether, allyl triethylammonium chloride, azobisisoheptonitrile, polyethylene glycol monooctylphenyl ether, hydroxyethyl cellulose, modified nano-alumina, and an interfacial compatibilizer; the second polymer molecule comprises the following preparation raw materials: hexadecyl methacrylate, styrene p-propanesulfonate, 3,7-dimethyl-6-octenoic acid, azobisisoheptonitrile, polyethylene glycol monooctylphenyl ether, hydroxyethyl cellulose, organically modified nano-diatomaceous earth, and an interfacial compatibilizer; the drag reducer prepared by the association of the two specific polymer molecules has strong shear resistance and high drag reduction rate.

The invention provides a Ni9S8-coated Au core-shell nanocrystal and a preparation method thereof, the Ni9S8-coated Au core-shell nanocrystal comprises an inner core and an outer shell wrapping the inner core, the inner core is Ni9S8, and the outer shell is Au. The preparation method comprises the following steps: mixing nickel diethyldithiocarbamate with oleylamine, 1-octadecene and 1-dodecyl mercaptan to form a uniform solution; under a protective atmosphere, heating the uniform solution to a reaction temperature, and carrying out a reaction to obtain a reaction solution; adding a tri-n-octylphosphine solution of chloroauric acid into the reaction solution, and reacting at the reaction temperature; and cooling the obtained reaction solution to room temperature, adding a mixed solution of a polar solvent and a non-polar solvent, separating a solid product, and drying to obtain the Ni9S8-coated Au core-shell nanocrystal. Due to the unique structure and potential properties of the Ni9S8-coated Au core-shell nanocrystal, the Ni9S8-coated Au core-shell nanocrystal has wide application potential in the fields of catalysis, energy storage, sensing and the like.