6215 results about "Acyl chloride" patented technology

A mixed liposome pharmaceutical formulation with multilamellar vesicles, comprises a proteinic pharmaceutical agent, water, an alkali metal lauryl sulphate in a concentration of from 1 to 10 wt. / wt. %, at least one membrane-mimetic amphiphile and at least one phospholipid. The membrane-mimetic amphiphile is hyaluronic acid, pharmaceutically acceptable salts of hyaluronic acid, lauramidopropyl betain, lauramide monoisopropanolamide, sodium cocoamphopropionate, bishydroxypropyl dihydroxypropyl stearammonium chloride, polyoxyethylene dihydroxypropyl stearammonium chloride, dioctadecyldimethylammonium chloride, sulphosuccinates, stearamide DEA, gamma-linoleic acid, borage oil, evening of primrose oil, monoolein, sodium tauro dihydro fusidate, fusidic acid, alkali metal isostearyl lactylates, alkaline earth metal isostearyl lactylates, panthenyl triacetate, cocamidopropyl phosphatidyl PG-diammonium chloride, stearamidopropyl phosphatidyl PG-diammonium chloride, borage amidopropyl phosphatidyl PG-diammonium chloride, borage amidopropyl phosphatidylcholine, polysiloxy pyrrolidone linoleyl phospholipid, trihydroxy-oxo-cholanylglycine and alkali metal salts thereof, and octylphenoxypolythoxyethanol, polydecanol X-lauryl ether, polydecanol X-oleyl ether, wherein X is from 9 to 20, or combinations thereof. The phospholipid is phospolipid GLA, phosphatidyl serine, phosphatidylethanolamine, inositolphosphatides, dioleoylphosphatidylethanolamine, sphingomyelin, ceramides, cephalin, triolein, lecithin, saturated lecithin and lysolecithin, or a combination thereof. The amount of each membrane mimetic amphiphile and phospholipid is present 1 to 10 wt. / wt. % of the total formulation, and the total concentration of membrane mimetic amphiphiles and phospholipids is less than 50 wt. / wt. % of the formulation.

The invention relates to two synthetic methods of 3,6-bis(4-bisfumaroyl aminobutyl)-2,5-diketopiperazine and a salt substitute thereof. The first synthetic method comprises the following steps of: obtaining a final product through the steps of cyclodehydration, hydrogenation, coupling, saponification, recrystallization and the like by using epsilon-benzoyloxycarbonyl-L-lysine and p-nitryl monoethyl fumarate as starting materials. The second synthetic method comprises the following steps of: obtaining the final product through the steps of cyclodehydration, coupling, saponification, recrystallization and the like by using N-6-trifluoroacetyl-L-lysine and the p-nitryl monoethyl fumarate (or p-nitryl monoethyl fumarate acyl chloride) as the starting materials. Meanwhile, the salt substitute of the 3,6-bis(4-bisfumaroyl aminobutyl)-2,5-diketopiperazine can also be generated by directly carrying out substitution reaction on the 3,6-bis(4-bisfumaroyl aminobutyl)-2,5-diketopiperazine as a reaction product and corresponding salt.

A method for functionalizing the wall of single-wall or multi-wall carbon nanotubes involves the use of acyl peroxides to generate carbon-centered free radicals. The method allows for the chemical attachment of a variety of functional groups to the wall or end cap of carbon nanotubes through covalent carbon bonds without destroying the wall or endcap structure of the nanotube. Carbon-centered radicals generated from acyl peroxides can have terminal functional groups that provide sites for further reaction with other compounds. Organic groups with terminal carboxylic acid functionality can be converted to an acyl chloride and further reacted with an amine to form an amide or with a diamine to form an amide with terminal amine. The reactive functional groups attached to the nanotubes provide improved solvent dispersibility and provide reaction sites for monomers for incorporation in polymer structures. The nanotubes can also be functionalized by generating free radicals from organic sulfoxides.

The present invention relates to a new industrial process for the synthesis of solvate- free 17a-acetoxy-11ss-[4-(N,N-dimethyl-amino)-phenyl]-19-norpregna-4,9-diene-3,20-dione [CDB -2914] of formula (I) which is a strong antiprogestogene and antiglucocorticoid agent. The invention also relates to compounds of formula (VII) and (VIII) used as intermediates in the process. The process according to the invention is the following: i) 3-(ethylene-dioxy)-estra-5(10),9(11)-diene-17-one of formula (X) is reacted with potassium acetilyde formed in situ in dry tetrahydrofuran by known method, ii) the obtained 3-(ethylene-dioxy)-17a-ethynyl-17ss-hydroxy-estra-5(10),9(11)-diene of formula (IX) is reacted with phenylsulfenyl chloride in dichloromethane in the presence of triethylamine and acetic acid, iii) the obtained isomeric mixture of 3-(ethylene-dioxy)-21-(phenyl-sulfinyl)-19-norpregna-5(10),9(11),17(20),20-tetraene of formula (VIII) is reacted first with sodium methoxide in methanol, then with trimethyl phosphite, iv) the obtained 3-(ethylene-dioxy)-17a-hydroxy-20-methoxy-19-norpregna-5(10),9(11),20-triene of formula (VII) is reacted with hydrogen chloride in methanol, then v) the obtained 3-(ethylene-dioxy)-17a-hydroxy-19-norpregna-5(10),9(11l); -diene-20- one of formula (VI) is reacted with ethylene glycol hi dichloromethane in the presence of trimethyl orthoformate and p-toluenesulfonic acid by known method, vi) the obtained 3,3,20,20-bis(ethylene-dioxy)-17a-hydroxy-19-norpregna- 5(10),9(11)-diene of formula (V) is reacted with hydrogen peroxide in a mixture of pyridine and dichloromethane in the presence of hexachloroacetone by known method, vii) the obtained 3,3,20,20-bis(ethylene-dioxy)-17a-hydroxy-5,10-epoxy-19-norpregn-9(11)-ene of formula (IV), containing approximately a 1:1 mixture of 5a,10a- and 5ss,10ss-epoxides, is isolated from the solution and reacted with a Grignard reagent obtained from 4-bromo-N,N-dimethyl-aniline in tetrahydrofuran.

The invention discloses a crosslinking hyper branched polymer composite nanofiltration membrane as well as the preparation method thereof. The crosslinking hyper branched polymer composite nanofiltration membrane is prepared by taking an ultrafiltration membrane as a basement membrane and crosslinking hyper branched polymer as a selecting layer through hyper branched polymer and the interfacial polymerization of polybasic acid, polybasic acyl chloride, polybasic anhydride and polybasic amine; and the interfacial polymerization takes the mixed solution of water and ethanol as the water phase and n-hexane, n-heptane or n-octane as the organic phase. As the hyper branched polymer has the spheroidal structure, a plurality of nano-voids exist in the interior of the molecule, so as to enable the selecting layer of the crosslinking hyper branched polymer composite nanofiltration membrane to be looser, and leads the nanofiltration membrane to maintain high flux and retention rate under the lower operating pressure. The nanofiltration membrane can be used in the fields of medicament, foodstuff, environmental protection, etc. The composite nanofiltration membrane is applicable to the separation and the condensation of high valence ions, low valence ions, neutral particles, drugs, food additives, etc.

The invention discloses an optical responsive azobenzene graft grapheme material and a preparation method thereof. The structural formula of the material is represented as formula 1. The preparation process comprises the steps of: dispersing graphene oxide and reductive graphene oxide in a single layer graphite structure in thionyl chloride to react to obtain the grapheme material with acyl chloride functional group; reacting azobenzene with amino group with acylated grapheme material in N,N-dimethyl formamide to prepare the optical responsive azobenzene graft grapheme material. The prepared azobenzene graft grapheme material has the advantages of good solubility in organic solvents, easy filming, controllable optical and electrical properties, high photoelectric conversion rate and the like.

A selective membrane having a high fouling resistance. In one embodiment, the selective membrane is a composite polyamide reverse osmosis membrane in which a hydrophilic coating is applied to the polyamide layer of the membrane, the hydrophilic coating being made by covalently bonding a hydrophilic compound to residual acid chlorides of the polyamide membrane, the hydrophilic compound including (i) at least one reactive group that is adapted to covalently bond directly to the polyamide membrane, the at least one reactive group being at least one of a primary amine and a secondary amine; and (ii) at least one non-terminal hydroxyl group.

The invention relates to a composite membrane surface modification method improving the pollution resistance performance of the separation membrane. Taking the porous membrane as the supporting body and taking the polyfunctionality acyl chloride and the amic as the polymeric monomer, the interface polymeric method is adopted for generating the polyamide desalination function layer which is then reacted with the hydrophilic monomer to implement the graft modification of the nascent state composite membrane. The invention has the advantages of simple and convenient operation, used for the preparation of surface modification of the composite membranes such as the reverse osmosis and nanofiltration, etc., with the interface polymeric method, the pollution resistance capability of the prepared composite membrane is improved.

A selective membrane with high fouling resistance. In one embodiment, the selective membrane is a composite polyamide reverse osmosis membrane, a hydrophilic membrane is applied on the polyamide layer of the composite polyamide reverse osmosis membrane, and the hydrophilic membrane is prepared by co- Valence bonding of a hydrophilic compound to the residual acid chloride of the polyamide membrane; the hydrophilic compound comprising: (i) at least one reactive group suitable for direct covalent bonding to the polyamide membrane, the at least one reactive group being at least a primary amine and One of the secondary amines; and (ii) at least one hydrophilic group selected from the group comprising: hydroxyl, carbonyl, trialkoxysilane, anion, and tertiary amine; (iii) wherein the Hydrophilic compounds are exclusive of polyethers.

The invention discloses a photo-curing monomer with ortho-phenolic hydroxyl strucutre, a preparation method and bond thereof. In the formula I monomer, the compound which has crylic acid at two ends or crylic acid double bond at one end and methylacrylic acid double bond at the other end is added to the amidogen of dopamine and derivant thereof through a Michael addition method to form corresponding secondary amine or tertiary amine. In the formula II monomer, the double bond is introduced by (methyl) acrylic anhydride, (methyl) crylic acid and (methyl) acryloyl chloride. The photopolymerization bond comprises the following components by weight percent: 20 to 99.9 percent of the compound with the ortho-phenolic hydroxyl structure, 0 to 70 percent of activated thinner and / or solvent, 0.1 to 10 percent of evocating agent and 0 to 60 percent of natural macromolecule or modified outcome thereof. The bond can be bonded in dry state and wet state, is a quick and long lasting bond, realizes the organic bond of biological bond and photopolymerization, has the advantages of low manufacture cost, simple and convenient operation and high productivity and has extensive application foreground in the biological bond field.

The invention overcomes the defects of cytotoxicity of the existing inorganic antibacterial agent and organic antibacterial agent, and complicated compounding process of graphene oxide and fabric, and provides a graphene oxide-based anti-bacterial finishing agent for dyeing, wherein the graphene oxide-based anti-bacterial finishing agent is a composite material of chitosan / graphene oxide / dye. A preparation method of the graphene oxide-based anti-bacterial finishing agent for dyeing comprises the steps of firstly, carrying out acylating chlorination on graphene oxide based on the reaction activity of carboxyl at the surface of graphene oxide, then covalently grafting a natural antibacterial material chitosan to graphene oxide based on the reactivity between acyl chloride and active amino or hydroxyl, and adsorbing the dye on the plane of graphene oxide by phi-phi interaction between graphene oxide and a water-soluble dye. The graphene oxide-based anti-bacterial finishing agent for dyeing can be applied to textiles. Graphene oxide which has no toxic or side effect on a human body, and natural cationic polymer chitosan are selected as antibacterial components, so that the cytotoxicity is low.

The invention discloses a multi-scale reinforcement body that carbon nano-tube is connected with carbon fiber and a preparation method aiming at solving the drawbacks of increasing rigidity at the interface, lowering toughness of material and not improving performance of resin base between the fibers and between carbon fiber plywoods after prior carbon fiber treatment is made. The multi-scale reinforcement body of carbon nano-tube connecting carbon fiber is made through combining between a carbon nano-tube decorated by 1, 6 hexamethylenediamine and carbon fiber with acyl chloride functional group on the surface. The preparation method comprises: the carbon nano-tube decorated by 1, 6 hexamethylenediamine and the carbon fiber with acyl chloride functional group on the surface are prepared before put into N,N-dimethylformamide for reaction, thereby getting the multi-scale reinforcement body of carbon nano-tube connecting carbon fiber. The invention has the advantages of big activity on the surface, a plurality of chemical activated functional groups, strong reactive activity, good cohesiveness with the base, improving shearing intensity at the interface for composite material by 127.5% to 144.7% and improving toughness for the base by 34.43% to 48.67%.

The invention discloses a preparation method of paraphthaloyl chloride with high purity, which takes terephthalic acid and a chlorinating agent as materials to prepare the paraphthaloyl chloride with high purity by reflux reaction and distillating separation for one time under the condition of catalysts, and then the method conducts treatment on byproducts to obtain additional products which can be utilized. The method has the advantages of being capable of improving the yield of the product to over 90-95 percent, realizing closed cycle for tail gas absorption and utilization, having no pollution to environment and being capable of achieving over 99.95 percent of product purity.

A preparation method and application of a molecular imprinted polymer on the silica surface for specifically adsorbing patulin belong to the technical field of bioassay. The method comprises the following steps: firstly pretreating the silica surface; siliconizing the silica surface to prepare APTS-silica and introducing amino groups; preparing ACPA-silica by dewatering and esterifying or an acyl chloride intermediate method and grafting an azo initiator on the silica surface; and finally taking the patulin analog 2-hydroxynicotinic acid as a template to replace molecules, taking acrylamide, methylacrylic acid, 4-vinyl pyridine and trifluoromethyl acrylic acid as the functional monomers and taking ethylene glycol dimethacrylate (EDMA) as a cross-linking agent to obtain the molecular imprinted polymer on the silica surface in acetonitrile and pyridine solvents by thermal initiation. The invention has the following advantages: as the pretreatment method for liquid chromatography of trace patulin in apple juice and related products, the polymer prepared by the invention can specifically adsorb the enriched patulin, the sample is simply and quickly treated and can be reused multiple times, and the polymer is resistant to acid and alkali treatment and is preserved under normal temperature, at the same time, the invention avoids the recovery loss caused by the traditional steps of removing impurities by alkaline washing by liquid-liquid extraction and removing organic solvents by rotary evaporation and reduces the usage amount of the organic solvents.

The invention discloses a polyamide nano filter membrane containing zwitterions and a preparation method thereof. The polyamide nano filter membrane containing the zwitterions comprises a porous polysulfone supporting player and a polyamide functional layer containing the zwitterions, and is prepared by carrying out interfacial polycondensation to the mixed water solution of polyamine and a zwitterionic monomer and the organic solution of multielement acyl chloride. Under the operation pressure of 0.6MPa, the nano filter membrane prepared by the method has high water flux (35-50L.m<-2>.h<-1>), and simultaneously, has very high trapping rate of 90-98% to divalent salt ions, and has lower trapping rate of less than 40% to univalent salt ions, in addition, the nano filter membrane has good stain resistance under the long-term operation. Thus, the prepared polyamide nano filter membrane containing the zwitterions has high permeability and stain resistance, the preparation method is simpleand easy to implement, the cost is low, and the industrial application prospect is good.

The invention discloses modified graphene and a preparation method thereof. The method comprises the following steps: performing oxidation treatment on natural flake graphite to obtain graphene oxide, and enabling graphene oxide to react with sulfoxide chloride to obtain graphene containing acyl chloride groups on the surface; then performing nucleophilic substitution reaction with 1,3-propane diamine, cyanuric chloride and a dihydric alcohol compound in sequence to obtain water-soluble graphene with hydroxyl groups on the surface, wherein the hydroxyl group content is 0.005-0.02%. Obtained modified graphene has relatively good water solubility, and is beneficial to stable dispersion of graphene; by adopting the characteristics of modified graphene, modified graphene can be mixed and uniformly dispersed with other concrete preparation materials very conveniently to prepare a reinforcing and toughening concrete product. In addition, operating conditions for preparing modified graphene can be easily met; moreover, modified graphene disclosed by the invention is easily-available in raw material, can be used for effectively reducing the cost and improving the economic benefits, and has relatively good application prospects.

The invention discloses a high-throughput hollow fiber composite nanofiltration membrane. The high-throughput hollow fiber composite nanofiltration membrane is composed of a supporting layer and a separating layer; the supporting layer is prepared from a higher molecular hollow fiber ultrafiltration membrane; the separating layer is a polyamide layer obtained via interfacial polymerization of multi-amines and multi-acyl chlorides; pure water flux of the high-throughput hollow fiber composite nanofiltration membrane is high, and removing rates of the high-throughput hollow fiber composite nanofiltration membrane on NaCl in NaCl aqueous solution, and MgSO4 in MgSO4 aqueous solution are both high. A preparation method of the high-throughput hollow fiber composite nanofiltration membrane comprises following steps: nonsolvent induced phase separation method is adopted so prepare a high molecular hollow fiber ultrafiltration membrane; the high molecular hollow fiber ultrafiltration membrane is immersed into a multi-amine aqueous solution containing an acid-binding agent so as to obtain a nanofiltration memebrane precursor; the nanofiltration memebrane precursor is contacted with an organic solution of multi-acyl chlorides so as to form the polyamide separation layer and obtain hollow fiber composite nanofiltration membrane wires; and at last an oxidizing agent is used for oxidation treatment, and curing treatment is carried out so as to obtain a finished product. The high-throughput hollow fiber composite nanofiltration membrane is high in water flux, low in cost, and excellent in performance, and is convenient to prepare.

The invention discloses a functional graphene oxide for adjusting and controlling the dispersibility of a solvent by using an organic chain segment as well as a preparation method thereof. The structural formula of the functional graphene oxide is shown in specification, wherein R is equal to R1, R2 and R3. The preparation method comprises the following steps: 1, dispersing graphite oxide prepared by a Hummers method in N, N-dimethylformamide to form uniform dispersion liquid; 2, adding a thionyl chloride agent into the product obtained in step 1 to perform reflux reaction to synthesize an intermediate product of graphite oxide activated by acyl chloride; 3, distilling the mixed liquor obtained in step 2 under reduced pressure to remove excessive thionyl chloride; 4, adding pyridine and graft organic molecules into the product obtained in step 3, and heating and stirring the mixture; and 5, filtering, washing and then drying the mixed liquor obtained in step 4. The functional grapheneoxide can disperse well in different solvents, particularly solvents with low polarity and low boiling point, can be preferably compatible with multiple polymer molecules, leads the preparation of nano particles / polymer nano composite materials to be possible, and has good application prospects and economic benefits.

The invention discloses a rosinyl bis-quaternary ammonium surfactant, the general molecular formula of which is as follows. In the formula, R is a rosinyl ricyclic diterpene structure, X is Br or I, and n is larger than or equal to 1 and smaller than or equal to 10. The invention also discloses a method for preparing the compound: firstly, dehydroabietic acid or disproportionated rosin is adopted to prepare rosinyl tertiary amine, and then the rosinyl tertiary amine and saturated dihalide are prepared into the rosinyl bis-quaternary ammonium surfactant through quaternization. The synthesis of the rosinyl tertiary amine comprises the following steps: the dehydroabietic acid or the disproportionated rosin is converted into active acyl chloride intermediate, and then the acyl chloride intermediate and N,N-dimethyl ethanolamine are prepared into the rosinyl tertiary amine in the presence of the triethylamine which is used as the acid-binding agent. The rosinyl tertiary amine and the saturated dihalide are reacted in the solvent isopropyl alcohol, and then vacuum drying is performed after filtration. The prepared surface active agent has good surface activity performance; the raw material is inexpensive and easy to obtain, and can be biodegraded; the synthetic method is assisted with microwave, the reaction time is short, and the product purity is high.

The invention discloses a double-layer polyamide surface layer composite reverse osmosis membrane and a preparation method thereof. The composite reverse osmosis membrane comprises a non-woven fabric layer and a porous supporting layer, wherein a double-layer polyamide surface layer which is prepared by reacting polyamine and poly (acyl chloride)s is arranged on the porous supporting layer. Compared with the prior art, the double-layer polyamide surface layer is arranged on the porous supporting layer of the prior reverse osmosis membrane, so that the thickness of the reverse osmosis membrane is increased; the membrane surface is more smooth, more hydrolysis resistant, more oxidation resistant, more scoring resistant and more pollution resistant; the abrasion resistance of the reverse osmosis membrane is improved; and the service life of the reverse osmosis membrane is prolonged. Moreover, the composite reverse osmosis membrane also has the characteristics of simple preparation and operation and high water permeability and salt retardation rate.

The invention relates to the field of papermaking and discloses a preparation method of hydrophobic oilproof paper. The preparation method includes: 1), making body paper: soaking bleached softwood chemical pulp, and pulping; mixing the bleached softwood chemical pulp, carboxymethyl cellulose, bacterial cellulose and dissolving pulp, making handsheet, and drying to obtain the body paper; 2), dissolving a natural polyhydroxy high molecular material in water, stirring, heating, holding temperature until a system is transparent, stirring, cooling to room temperature to obtain coating liquid, andcoating; 3), drying the body paper after being precoated, using an acyl chloride solution to treat the surface of the body paper, and drying to obtain a finished product. The problem that paper is porous is solved by means of coating the surface of the paper with the polyhydroxy high molecular material which is natural and easy to degrade, and an acyl chloride compound not containing fluorine is used to replace fluorine-containing polymer to endow the paper with hydrophobicity and oilproofness, so that environment friendliness is realized. In addition, paper prepared by the method has good strength performance and printability.

A selective membrane having a high fouling resistance. In one embodiment, the selective membrane is a composite polyamide reverse osmosis membrane in which a hydrophilic coating is applied to the polyamide layer of the membrane, the hydrophilic coating being made by covalently bonding a hydrophilic compound to residual acid chlorides of the polyamide membrane, the hydrophilic compound including (i) at least one reactive group that is adapted to covalently bond directly to the polyamide membrane, the at least one reactive group being at least one of a primary amine and a secondary amine; and (ii) at least one hydrophilic group, the at least one hydrophilic group being selected from the group consisting of a hydroxyl group, a carbonyl group, a trialkoxysilane group, an anionic group and a tertiary amino group; (iii) wherein the hydrophilic compound is devoid of a polyalkylene oxide group.

The invention discloses a method for preparing a hollow fiber type forward osmotic membrane, which specifically comprises the following steps that: 1, a hollow fiber substrate membrane is made into a membrane component, and the membrane component is put in a membrane filtration device; 2, the residual glycerol on the surface of the membrane component is washed with water, the residual water of the membrane component is removed, and the hollow fiber substrate membrane is dried; 3, a polyamine aqueous solution is prepared and is enabled to pass through the internal surface of the membrane component, and then, the residual water on the surface of the membrane component is removed; 4, an organic solution which contains multi-acyl chloride is prepared, and is enabled to pass through the internal surface of the membrane component to react for a certain while; and 5, after the reaction is completed, the aqueous solution which contains alcohol is used to treat the membrane which is obtained from the reaction, so the hollow fiber type forward osmotic membrane is obtained. The hollow fiber composite forward osmotic membrane which is prepared by the method for preparing the hollow fiber type forward osmotic membrane has high filling rate and pollution resistance, is easy to clean, has a large effective filter area compared with components of the same size, and is suitable for a forward osmotic separation process.

The invention provides a polyamide / COFs hybridized nanofiltration composite membrane. The composite membrane comprises a composite layer and a loaded porous frame material. The composite layer is a layer of polyamide compound formed by conducting polymerization reaction on piperazine and trimesoyl chloride, and the thickness is 100-500 nm. The porous frame material is SNW-1 obtained when melamine and terephthalaldehyde react, and is a compound layer with the loading amount of 0.5-3 g / m<2>. A covalent organic framework is effectively hybridized in a separation layer of the composite membrane, and more water channels are provided for the nanofiltration membrane. By means of the method, various types of COFs can be introduced onto a polyether sulfone base membrane, the water flux can reach 200 L / m<2>.h.MPa and increased by 2 times, the sodium sulfate retention rate of the nanofiltration membrane is still kept at 80% or above, and the high water flux and the high retention rate are achieved.

The invention discloses a polyimide liquid crystal vertical alignment agent, a prepration method and a liquid crystal box prepared thereby. The liquid crystal vertical alignment agent is prepared by dissolving soluble polyimide which accounts for 2.5-5% of the weight of the alignment agent into an organic solvent, the soluble polyimide is prepared by leading 1-50 parts by weight of tetracarboxylic dianhydride, 1-50 parts by weight of diamine with a special structure, 1-50 parts by weight of diamine and 40-80 parts by weight of organic solvent to react under the protection of nitrogen and at the temperature of 160-180 DEG C for 5-12 hours, and the diamine with the special structure is prepared by leading HO-B-OH, a catalyst, the organic solvent, halogenated hydrocarbon X-R and dinitro-substituted benzoyl chloride to carry out three-step reaction. The polyimide of a liquid crystal vertical alignment film formed by using the liquid crystal vertical alignment agent disclosed by the invention is soluble, a pretitle angle of the liquid crystal box prepared by spin-coating the polyimide liquid crystal vertical alignment agent is close to 90 degrees, and a liquid crystal display prepared thereby has excellent performances of fast response, wide viewing angle, high contrast degree and the like.

The invention relates to a fluorescence probe for detecting intracellular hydrogen sulfide and a preparation method and application of the fluorescence probe. Cy7 fluorochrome and sodium acetate are dissolved in anhydrous dimethylformamide (DMF), heating reflux is carried out for 2-4 hours under protection of Ar gas, cooling and suction filtration are carried out on an obtained mixture, mother liquor is crystallized under the low temperature of minus 4-20 DEG C, and keto form cyanine reddish brown crystals are obtained after the suction filtration; toluoyl benzoic acid and oxalyl chloride are dissolved in anhydrous CH2Cl2, then a bit of DMF is added, mixing is carried out for 2-6 hours under the temperature of 0 DEG C, and toluoyl benzoyl chloride is obtained; and keto form cyanine and triethylamine are dissolved in the anhydrous CH2Cl2 and are cooled to be 0 DEG C, the toluoyl benzoyl chloride is added dropwise, mixing is carried out for 10-30 minutes under the temperature of 0 DEG C, the mixture is heated to be in the room temperature, mixing is carried out overnight, suction filtration and spinning drying are carried out, separation is carried out through a chromatographic column, green solids are obtained after the spinning drying, and the structural formula is as follows. The fluorescence probe is simple in composition, high in detection speed, free of long-term incubation in a detection process, high in sensitivity, and capable of detecting intracellular endogenic hydrogen sulfide.

The invention provides a method for preparing chiral 4-substituted dihydrofuran-2(3H)-ketone. The method comprises the following steps: (a) dropwise adding acyl chloride (3) into an organic solvent solution of a compound (1), enabling reaction to obtain an acyl chloride intermediate solution, then dropwise adding an organic solvent solution of a compound (2) and enabling reaction to obtain a compound (4); (b) dropwise adding a bis(trimethylsilyl)amide alkali metal salt solution into an organic solvent solution of the compound (4), enabling reaction, dropwise adding a compound (5) into the obtained reaction liquid and enabling reaction to obtain a compound (6); (c) enabling reaction between the compound (6) and alkali to obtain a compound (7); (d) enabling reaction between the compound (7) and a reducing agent to obtain a compound (8), wherein R is selected from aryl, arylmethyl or alkyl, R1, R2 and R3 are independently selected from alkyl, and X is selected from Cl, Br or I. The method is simple in process, strong in operability and easy for industrial production. The reaction route is shown in the description.

Synthesis of high-purity N-acyl-N-methyl-sodium taurine is carried out by reacting N-acyl-N-methyl-sodium taurine with fatty acyl chloride under inorganic base condition in water and hydrophilic mixed dissolving medium. It achieves convenient operation and industrial production.

The invention relates to a method for synthesizing a visible-light response type azobenzene polymer. The method comprises the following steps: preparing tetramethoxy dihydroxyazobenzene from 2,6-dimethoxyaniline and 3,5-dimethoxy phenol through diazo-reaction, reacting tetramethoxy dihydroxyazobenzene as a raw material with 6-bromohexane alcohol to prepare tetramethoxy-4-ethanol oxyl azobenzene, grafting azobenzene onto a polypropylene acyl chloride framework through alcoholysis reaction of acyl chloride groups, and converting unreacted acyl chloride groups into carboxyl through hydrolysis, thereby finally obtaining the visible-light response type azobenzene polymer, namely, a 2-(2,6,2',6'-tetramethoxy-4-hexyloxy azobenzene phenoxy) crylic acid ethyl ester acrylic copolymer. The method has the advantages that the method is simple and feasible, the synthesized polymer has visible-light response type azobenzene groups, trans / cis-form conversion is achieved under the radiation of green light (520nm), reverse conversion can be achieved under radiation of blue light (420nm), and compared with conventional azobenzene molecules, the azobenzene polymer has the most remarkable advantage that bidirectional conversion of isomer can be achieved without ultraviolet light.