28 results about "Fluoroacetone" patented technology

The invention discloses a synthesis method of 2-bromomethyl-5-trifluoromethyl furan, which comprises the following steps: S1, carrying out reaction on acetoacetate and halogenated trifluoroacetone under the action of an alkaline substance and a catalyst to generate a 2-acetyl-5, 5, 5-trifluoro-4-oxovalerate crude product; s2, carrying out a cyclization reaction on the 2-acetyl-5, 5, 5-trifluoro-4-oxovalerate crude product, so as to obtain a 2-methyl-5-(trifluoromethyl) furan-3-formate crude product, and carrying out a cyclization reaction on the 2-acetyl-5, 5, 5-trifluoro-4-oxovalerate crude product to obtain a 2-methyl-5-(trifluoromethyl) furan-3-formate crude product; s3, adding an alkaline substance into the crude product, carrying out hydrolysis, and adding acid to adjust the pH value after the hydrolysis is completed, so as to obtain 2-methyl-5-(trifluoromethyl) furan-3-formic acid; s4, the 2-methyl-5-(trifluoromethyl) furan-3-formic acid is subjected to a heating decarboxylation reaction, and 2-methyl-5-(trifluoromethyl) furan is obtained; and S5, carrying out a bromination reaction on the 2-methyl-5-(trifluoromethyl) furan and a bromination reagent to obtain a final product 2-bromomethyl-5-(trifluoromethyl) furan. The raw materials used in the synthesis method are easy to obtain, use of control chemicals is not involved, and industrialization is easy to achieve.

The invention discloses a lithium dihydrogen phosphate preparation method, which comprises: S1, mixing a refined lithium sulfate solution with an extraction agent solution, and carrying out standing layering to obtain an upper layer solution; s2, mixing the upper-layer solution with a detergent, washing, and separating to obtain a washing solution; s3, mixing the washing liquid with a phosphoric acid solution, and standing for layering to obtain a lower-layer solution; s4, mixing the lower-layer solution with a component regulator; and carrying out solid-liquid separation. An extracting agent in the extracting agent solution comprises at least one of benzoyl trifluoroacetone, trialkyl phosphine oxide and sulfonated calixarene. The specific extraction agent efficiently selects lithium ions to separate impurities, lithium dihydrogen phosphate is obtained through direct reverse extraction after washing, lithium dihydrogen phosphate does not need to be converted into other lithium products to prepare lithium dihydrogen phosphate, and the process production period is shortened. In addition, lithium dihydrogen phosphate is prepared through washing and reverse extraction after impurities are efficiently selected and separated through an extraction agent; the purity is high; the battery grade lithium dihydrogen phosphate can be obtained.

The invention belongs to the technical field of preparation of organic chemicals, and particularly relates to trifluoropyruvic acid and a method for preparing trifluoropyruvic acid from trifluoroacetone. The method comprises the following steps: dissolving trifluoroacetone in a chlorinated solvent, adding a catalyst, introducing chlorine, carrying out a closed reaction, controlling the reaction temperature, cooling to room temperature after the reaction is finished to obtain a 1, 1, 1-trichlorotrifluoroacetone reaction mixture, adding an alkali liquor to carry out a hydrolysis reaction, separating out a water phase after the reaction is finished, and drying to obtain the trifluoropyruvic acid. And continuously applying the chlorination solvent, continuously adding the acid into the water phase to adjust the pH value to 3-4 to obtain a trifluoropyruvic acid water solution, finally extracting and pulping to obtain a wet trifluoropyruvic acid product, and purging with air to obtain a pure trifluoropyruvic acid product. According to the method for preparing trifluoropyruvic acid from trifluoroacetone, the raw materials are easy to obtain, the process is stable, the yield is high, the cost is low, and the invention further provides a trifluoropyruvic acid product.

The invention provides a composite extraction agent and application thereof in separation and recovery of lithium from lithium precipitation mother liquor. Relates to the technical field of composite extraction. The composite extraction agent comprises an extraction agent, a synergistic extraction agent and a diluent, the extraction agent comprises one or more of 1, 3-bis (4-fluorophenyl)-1, 3-propanedione, 2, 2-difluoro-1, 3-diphenyl-1, 3-propanedione, 1-phenyl-3-isoheptyl-1, 3-propanedione and benzoyl trifluoroacetone, and the diluent comprises one or more of 1, 3-bis (4-fluorophenyl)-1, 3-propanedione, 2, 2-difluoro-1, 3-diphenyl-1, 3-propanedione, 2, 2-difluoro-1, 3-diphenyl-1, 3-propanedione, 1-phenyl-3-isoheptyl-1, 3-propanedione and benzoyl trifluoroacetone. The synergistic extraction agent is prepared from one or more of tributyl phosphate, triisobutyl phosphate, triamyl phosphate, tributyl phosphine oxide and bis (4-fluorophenyl) phosphine oxide; the diluent comprises one or more of kerosene, sulfonated kerosene, tetradecane and tetradecanol. The composite extraction agent adopted by the invention has low requirement on pH, better acid and alkali resistance stability, small solution loss and good selective effect on lithium, the lithium recovery cost is reduced, and the comprehensive lithium extraction efficiency can reach 97.0% or above.

The invention belongs to the technical field of preparation of organic chemicals, and particularly relates to 2-methyl-5-trifluoromethyl furan and a preparation method thereof. The preparation method comprises the following steps: adding a solvent into trifluoroacetone, adding alkali under an ice bath condition, adding 1-chloro-2-methyl ethylene oxide, reacting at room temperature, adding acid, reacting at 40-60 DEG C to complete a dehydration reaction, then adding alkali for aromatization, continuing to complete an aromatization reaction, adding water to extract a reaction system, taking an organic phase, filtering, washing and drying to obtain the 1-chloro-2-methyl ethylene oxide. And rectifying to obtain the 2-methyl-5-trifluoromethyl furan. According to the 2-methyl-5-trifluoromethyl furan and the preparation method thereof provided by the invention, the reaction conditions are mild, the steps are simple, and the prepared 2-methyl-5-trifluoromethyl furan is high in yield and suitable for industrial production.

The invention belongs to the technical field of trifluoroacetone production equipment, and particularly relates to a trifluoroacetone production method and equipment. The trifluoroacetone production equipment comprises a reaction kettle, a cleaning ring attached to the inner wall of the reaction kettle is slidably installed in the reaction kettle through an electric push rod, a flow dividing ring is fixedly installed at the bottom end of the cleaning ring, and the diameter of the flow dividing ring is smaller than that of the cleaning ring; a rotating ring is rotatably installed on the outer wall of the flow dividing ring, blades and bristles are rotatably installed on the rotating ring, a hot water pipe is externally connected to the cleaning ring, drainage holes are formed in the bottom of the cleaning ring, a first upper drainage groove and a first lower drainage groove are formed in the flow dividing ring, and a second upper drainage groove and a second lower drainage groove are formed in the rotating ring. A blocking ring used for blocking the first upper drainage groove or the first lower drainage groove is installed on the outer wall of the flow dividing ring in a sliding mode, blocky dirt is soaked and cleaned by switching blocking of the first lower drainage groove or the first upper drainage groove, and the problem that polymer dirt blocks are difficult to remove in the trifluoroacetone production process is effectively solved.

This invention provides a method and system for preparing trifluoropyruvate esters using a centrifugal method, relating to the field of organofluorine chemical synthesis technology. The centrifugal method for preparing trifluoropyruvate esters includes: circulating and spraying an alcohol-ether solution containing an aldehyde compound and a catalyst in a centrifugal reactor, and introducing hexafluoropropylene oxide to catalyze the reaction between the aldehyde compound and hexafluoropropylene oxide, yielding a reaction product; separating the reaction product into gas and liquid phases, and separating the gas phase product by distillation to obtain trifluoropyruvyl fluoride and hydrofluorocarbons; and esterifying the trifluoropyruvyl fluoride and alcohol in a microchannel reactor to obtain trifluoropyruvate esters. The centrifugal method for preparing trifluoropyruvate esters described in this invention has advantages such as simple and readily available raw materials, mild reaction conditions, and high conversion and yield.

The invention provides an electrochromic polymer, an electrochromic film and a preparation method of the electrochromic polymer. The structural formula of the electrochromic polymer is shown in the formula I. In the formula I, R is a C4-C50 alkane chain; n is the degree of polymerization, and n is 20-300; m is 0-2, the number-average molecular weight Mn of the electrochromic polymer is 5000-20000 Da, and the polydispersity coefficient D of the electrochromic polymer is 3.0-10.0. According to the invention, an aromatic hydrocarbon carbazole derivative and trifluoroacetone are used as monomers, and the electrochromic polymer is prepared by one step through Friedel-Crafts hydroxyl alkylation condensation polymerization catalyzed by Lewis acid.

The present invention discloses a benzopyran derivative, a synthesis method, and an application thereof. Trifluoroacetone containing a benzene ring and different heterocycles and a substituted salicylaldehyde are used as raw materials, DMSO is used as a solvent, and a reflux reaction is performed to generate a crude benzopyran derivative with different substituents. The crude product is post-treated to obtain the benzopyran derivative. The reaction is tracked by TLC or liquid chromatography, and the reaction process is simple and easy to operate. Eighteen synthesized compounds were subjected to antifungal activity experiments to determine the antifungal activity of the compounds against Fusarium graminearum, Rhizoctonia solani, Fusarium moniliforme, and Fusarium oxysporum. At 200 ppm, thiophene dibromopyrone had the highest inhibition rate against Fusarium graminearum, at 98.84%; unsubstituted dichloropyrone had the highest inhibition rate against Fusarium graminearum, at 66.08%; pyridine dichloropyrone had the highest inhibition rate against Fusarium oxysporum, at 71.07%; and pyridine dichloropyrone had the highest inhibition rate against Fusarium moniliforme, at 69.12%. The benzopyran derivatives synthesized by the present invention will show good application prospects in various fields such as medicine, organic synthesis, biosensing and optoelectronic materials.

The invention discloses a coordination europium ion-based post-modification COF fluorescent composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking terephthalaldehyde and melamine as construction elements, preparing a melamine covalent organic framework with abundant binding sites, embedding Eu < 3 + > ions into the melamine covalent organic framework through heating reflux by adopting a post-modification method, and then adding 2-thiophenoyl trifluoroacetone and a phenanthroline ligand for modification, thereby obtaining the Eu < 3 + > covalent organic framework. According to the present invention, the europium ion coordination-based post-modification COF fluorescent composite material with the antenna effect is constructed, after the fluorescent probe is prepared, the abundant Eu < 3 + > on the melamine-based covalent organic frame skeleton can be coordinated with more target to-be-detected substances TC, and the performance test characterization results show that the fluorescent probe has the characteristic that the fluorescent probe has the characteristic of the europium ion coordination-based post-modification COF fluorescent material; the fluorescent probe disclosed by the invention has high selectivity and high sensitivity on detection of tetracycline antibiotics, the detection limit is 1.36 mu mol / L, and the fluorescence intensity and the tetracycline concentration are in a good linear relationship.

This invention belongs to the field of organic chemical preparation technology, specifically relating to trifluoropyruvate and a method for preparing trifluoropyruvate from trifluoroacetone. The method for preparing trifluoropyruvate from trifluoroacetone according to this invention involves: firstly, dissolving trifluoroacetone in a chlorinating solvent, then adding a catalyst, introducing chlorine gas, and sealing the reaction, controlling the reaction temperature, and cooling to room temperature after the reaction to obtain a 1,1,1-trichlorotrifluoroacetone reaction mixture. An alkaline solution is added to initiate a hydrolysis reaction. After the reaction, the aqueous phase is separated, and the chlorinating solvent is reused. Acid is added to the aqueous phase to adjust the pH to 3-4 to obtain an aqueous trifluoropyruvate solution. Finally, extraction and slurrying are performed to obtain wet trifluoropyruvate, which is then purged with air to obtain pure trifluoropyruvate. The method for preparing trifluoropyruvate from trifluoroacetone provided by this invention uses readily available raw materials, has a stable process, high yield, and low cost. This invention also provides a trifluoropyruvate product.

The invention discloses a method for synthesizing high-purity bisphenol AF, which comprises the following reaction steps: taking phenol and hexafluoroacetone trihydrate as raw materials, taking pentacyanocyclopentadiene as a catalyst, and heating and reacting in a protective atmosphere; after the reaction is finished, adding a NaOH aqueous solution into the reaction liquid to adjust the pH to 7, and extracting and separating the liquid by using dichloromethane; and evaporating the dichloromethane extract containing bisphenol AF to dryness to obtain a bisphenol AF crude product, and recrystallizing the bisphenol AF crude product with methyl tert-butyl ether to obtain a bisphenol AF pure product. The catalyst adopted in the invention avoids the defect of insufficient acidity of a conventional catalyst while avoiding a high-corrosivity catalyst, so that the production operation is mild, and the reaction production equipment is conventional. The used catalyst is high in boiling point, stable in structure, capable of being recycled and environmentally friendly, and a new technical method is provided for industrial production of high-quality bisphenol AF.

The invention provides a method for removing trifluoroacetone in hexafluoroisopropanol and a device and application thereof, and relates to the technical field of extractive distillation, and the method comprises the following steps: spraying water downwards from the tower top of an extractive distillation tower as an extraction agent, enabling the extraction agent to be in contact with a hexafluoroisopropanol crude product for extraction so as to remove trifluoroacetone in the crude product, purified hexafluoroisopropanol is enriched at the tower top, and a mixture of trifluoroacetone, water and impurities is enriched at the tower kettle; wherein the temperature of the extractive distillation tower is 50-200 DEG C, and the reflux ratio is (1-100): 1. The technical problem that hexafluoroisopropanol (HFIP) and trifluoroacetone (TFK) are difficult to separate in the prior art is solved, and the technical effects that new substances are prevented from being introduced into a product system, the HFIP and the TFK can be effectively separated, a high-purity HFIP product is obtained, and meanwhile production energy consumption and wastewater discharge are reduced are achieved.

The invention belongs to the technical field of electrochromic materials, and discloses an indole derivative electrochromic polymer, a preparation method of the indole derivative electrochromic polymer, an electrochromic polymer film and application of the electrochromic polymer film. A soluble high-performance electrochromic polymer with high transparency in a neutral state and green oxidation state is prepared through Friedel-Crafts hydroxyl alkylation condensation polymerization of an indole derivative and trifluoroacetone. The polymer film is colorless and transparent in a neutral state, reversibly turns into green under the driving of 1.2 V low voltage, and shows high optical contrast and relatively good cycling stability, so that the Friedel-Crafts hydroxyl alkylation polycondensation reaction can be used as a general means for constructing a neutral transparent non-conjugated electrochromic polymer. The prepared polymer has excellent processability, and has wide application prospects in the fields of energy-saving displays, static information display, dynamic information encryption, military camouflage and the like.

The present invention relates to a positive electrode including a positive electrode active material layer including a positive electrode active material, a sulfide-based solid electrolyte, a conductive composite material including a core portion including a carbon-based conductive material and a coating portion including a fibrous binder, and an all-solid-state battery including the same, and an all-solid-state battery including the same. And a coating portion on at least a portion of the core portion and including a polymer nanoparticle that is a copolymer of polyvinylidene fluoride (PVDF) and a comonomer, where the comonomer is one or more selected from the group consisting of hexafluoropropylene (HFP), chlorotrifluoroethylene (CTFE), hexafluoroacetone (HFA), 1-hydropentafluoropropylene (HPFP), tetrafluoroethylene (TFE), and trifluoroethylene (TrFE). According to the present invention, a positive electrode and an all-solid-state battery comprising the same can be provided, in which the positive electrode has excellent ionic / electronic conductivity and charge / discharge performance and excellent mechanical properties such as tensile strength.

The invention discloses a silicon material treating agent with a fluorescent tracing function and a preparation method thereof. The treating agent comprises a basic treating agent and a fluorescent agent, wherein the basic treating agent is prepared from nine components including hydroxyl-terminated polydimethylsiloxane, methyl phenyl silsesquioxane resin, n-heptane, ethyl acetate and the like according to a specific mass ratio; the fluorescent agent is a europium-2-thiophenoyl trifluoroacetone-triphenylphosphine oxide complex, the fluorescent agent and new ethyl acetate are firstly mixed and stirred uniformly, then the mixture is added into the basic treatment agent and stirred uniformly, and the mass ratio of the fluorescent agent to the ethyl acetate to the basic treatment agent is (0.5-1.5): (8-10): (1900-2100). The treating agent disclosed by the invention shows red fluorescence under 365nm purple light, can be used for intuitively detecting missing brushing, and has an activation effect on the surface of a silicon material, so that the shear strength and the peel strength of the treated silicon material and a double-sided adhesive tape are high, and the bonding requirement of a new energy power battery buffer material is met.

The present invention relates to the field of catalysts, and particularly to a SO 4 2‑ / ZrO 2 -M x O y catalyst, its preparation and its application in the synthesis of hexafluoroacetone. A method for preparing hexafluoroacetone by isomerization of hexafluoropropylene oxide is disclosed. The SO 4 2‑ / ZrO 2 -M x O y catalyst activation and regeneration method. The hexafluoropropylene oxide isomerization to hexafluoroacetone reaction involving this catalyst has the characteristics of high space velocity, high catalytic efficiency, no by-products, strong activation and regeneration ability, and can be catalyzed at room temperature, with remarkable economy, suitable for large-scale production. Moreover, this catalyst has a long service life, simple activation steps, and reliable regeneration performance.

The invention provides application of a magneto-optical bifunctional material based on a beta-diketone rare earth gadolinium complex in fluorescence imaging, and belongs to the technical field of application of rare earth complexes. According to the application of the magneto-optical bifunctional material based on the beta-diketone rare earth gadolinium complex in fluorescence imaging, the expression of the magneto-optical bifunctional material is [Gd (dppz) (BTA) 3], BTA is benzoyl trifluoroacetone, dppz is dipyridino [3, 2-a: 2 ', 3'-c] phenazine, and Gd is gadolinium. The material has remarkable magnetic and fluorescent properties, can be used for carrying out broad-spectrum imaging on six common cancer cells, is remarkably superior to the existing magneto-optical bifunctional material which only has a specific imaging function on one kind of cancer cells, and shows wide biomedical application potential.

The invention discloses a composite coating, a preparation method thereof and a composite coating, and relates to the technical field of coatings. The composite coating is prepared from titanium dioxide, sodium carboxymethyl cellulose, bisphenol hexafluoroacetone diglycidyl ether, acidified montmorillonite and deionized water. According to the composite coating provided by the invention, cellulose and montmorillonite nanosheets form a compact micro-nano coating, so that the effect of isolating moisture and oxygen is achieved; a titanium dioxide photocatalytic sterilization function is combined with a high fluorine content and a cross-linked structure to endow the coating with a super-hydrophobic surface, and a self-cleaning function is synergistically realized. The composite coating provided by the invention has the triple characteristics of'green ', 'self-cleaning' and'antibacterial ', and has a wide application prospect in the wide fields of medical treatment and public health, food packaging and processing, building and home furnishing, marine antifouling and the like.

The invention relates to a rare earth fluorescent probe and an ammonia aniline sensing application thereof. The invention discloses a novel rare earth europium complex luminescent material, the molecular formula of the complex is Eu (NTA) 3 (PBO), and in the formula, NTA is naphthoyl trifluoroacetone; in the formula, PBO is a neutral heterocyclic ligand 2-(2-pyridine) benzoxazole. The compound is prepared by carrying out coordination reaction on europium nitrate, NTA with three times of equivalent weight and PBO ligand with one time of equivalent weight. The luminescent material disclosed by the invention is very good in luminescent property; the luminescent material has selective response to ammonia gas, aniline and trimethylamine, has high sensitivity, and quickly shows the sensing response characteristic of fluorescence quenching after being placed in an atmosphere containing amine VOCs (Volatile Organic Compounds); the material has good solubility and stability, and can be easily prepared into a paper-based or solid substrate-based fluorescence sensing film device, an inert substrate doped composite sheet device, a ratio fluorescence sensing device or a fluorescence sensing device. The devices also rapidly show fluorescence sensing performance of rapid fluorescence quenching response and sensitive recognition in ammonia gas, aniline or trimethylamine atmosphere, and can be applied to detection of amines.

The invention provides a synthesis method of 1, 1, 3, 3-tetrafluoro-2-acetone, and belongs to the technical field of fluorine-containing compound synthesis. The method comprises the following steps: by taking ethyl 4, 4-difluoroacetoacetate as a raw material, carrying out fluorination reaction to obtain an intermediate difluoroacetyl ethyl difluoroacetate; the intermediate is subjected to a hydrolysis decarboxylation reaction to generate 1, 1, 3, 3-tetrafluoro-2-acetone, and then the product is extracted and purified through normal-pressure rectification separation to obtain the 1, 1, 3, 3-tetrafluoro-2-acetone. The method is mild in reaction condition, short in reaction time and high in treatment efficiency, the purity of the prepared 1, 1, 3, 3-tetrafluoro-2-acetone reaches 97.8% or above, and the highest purity can reach 98.5%; the yield reaches 77.4% or above; meanwhile, the method is easy to operate, low in cost, environmentally friendly, safe, reliable and low in equipment requirement.

The present application belongs to the technical field of organic chemical preparation, and particularly relates to 2-methyl-5-trifluoromethyl furan and a preparation method thereof. The preparation method comprises the following steps: adding a solvent into trifluoroacetone, adding a base under ice bath condition, adding 1-chloro-2-methyl epoxide, reacting at room temperature, adding an acid, completing a dehydration reaction under the condition of 40-60 DEG C, then adding a base for aromatization, continuously completing an aromatization reaction, extracting the reaction system by adding water, taking an organic phase, and rectifying to obtain 2-methyl-5-trifluoromethyl furan. The 2-methyl-5-trifluoromethyl furan and the preparation method thereof have the advantages of mild reaction condition, simple steps, high yield of the prepared 2-methyl-5-trifluoromethyl furan, and suitability for industrial production.

The invention provides a dimerized carbazole type electrochromic polymer and a preparation method and application thereof, the structural formula of the dimerized carbazole type electrochromic polymer is as shown in formula I. In the formula I, R is a C6-C40 alkane chain or alkoxy hydrocarbon chain; n is the degree of polymerization, and n is 10-1000; the number-average molecular weight Mn of the dimerization carbazole type electrochromic polymer is 1000 to 5000 Da, and the polydispersity coefficient D of the dimerization carbazole type electrochromic polymer is 1.0 to 4.0. According to the preparation method, dimerized carbazole and trifluoroacetone are taken as monomers, and the dimerized carbazole type electrochromic polymer is prepared in one step through Friedel-Crafts hydroxyl alkylation condensation polymerization catalyzed by Lewis acid; the method is high in atom economy and mild in reaction condition, the carbazole monomer does not need to be pre-functionalized, and the synthesis steps are simplified.

The present application belongs to the technical field of pharmaceutical chemistry, and particularly relates to a catalytic preparation method of a hexafluoroacetone intermediate, hexafluoroisopropanol. The present application takes acetone and a fluorine source as raw materials, and obtains hexafluoroacetone under the action of a multi-element catalyst, then directly separates to obtain a hexafluoroacetone product. Through the preparation technology of the present application, a high-purity hexafluoroacetone intermediate can be obtained at low cost, high safety and high efficiency.

The invention relates to the technical field of fluorine compound preparation, and discloses an efficient synthesis method of hexafluoroacetylacetone. The efficient synthesis method of hexafluoroacetylacetone comprises the following steps: step 1, adding a metal compound into a solvent A, dropwise adding trifluoroacetone and ethyl trifluoroacetate, reacting, and distilling out the solvent A to obtain a reaction mixture; 2, cooling the reaction mixture obtained in the step 1, adding a solvent B, carrying out suction filtration, washing the obtained filter cake with the solvent B, adding inorganic acid, stirring, and distilling to obtain a product, namely hexafluoroacetylacetone; according to the efficient synthesis method of hexafluoroacetylacetone, the product yield reaches 90% or above, the reaction period is shortened to 4 days from 14 days, the production cost is reduced by about 50%, and the method has wide application prospects.

The invention discloses a method for synthesizing a vaccine adjuvant Sulfavant A. The method relates to the technical field of vaccine adjuvant synthesis, and comprises the following steps: selectively removing-OAc groups on different-head carbon in a compound 3 to obtain a compound 4; the compound 4 is subjected to a Schmidt glycosylation reaction to obtain a compound 6, and the reaction formula is as follows: # imgabs0 #, THF is tetrahydrofuran; the DBU is 1, 8-diazabicyclo undec-7-ene, and the DBU is 1, 8- DCM is dichloromethane; the TFK is trifluoroacetone. According to the method, the defects of an existing synthesis route are overcome, the synthesis efficiency and the yield are improved, the cost is reduced, and the post-treatment process is simplified.

The invention provides a fluorine-containing coumarin compound containing a chalcone structure as well as a preparation method and application of the fluorine-containing coumarin compound, and belongs to the technical field of organic synthetic chemistry. The structural formula of the compound is # imgabs0, wherein R1 and R2 are independently selected from H, F, Cl, Br, Me, OMe, or a naphthalene ring, or a heterocyclic ring of thiophene, furan and pyridine; the preparation method comprises the following steps: mixing and dissolving a fluorine-containing coumarin compound 1a, a benzoyl trifluoroacetone compound 2a, a solvent and an additive, then carrying out a reaction, and after the reaction is finished, carrying out separation to obtain the fluorine-containing coumarin compound. According to the invention, trifluoromethyl is introduced through a synthesis method of alpha-beta unsaturated ketone, then a chalcone structure is introduced to change the properties of coumarin, the structure is modified, and the antibacterial activity of coumarin is enhanced.

The present invention discloses a rare earth europium metal complex stress luminescence material, a preparation method thereof and an application thereof, belonging to the technical field of stress luminescence materials. The chemical formula of the rare earth europium metal complex stress luminescence material is Eu(tpfd)3L, wherein tpfd is 4-pyridinecarboxyl trifluoroacetone, and L is 2,2'-bipyridine or 1,10-phenanthroline. The Eu(tpfd)3L is prepared by a solvent evaporation method. This material has strong stress luminescence performance and photoluminescence performance, and has good acid-base stability. This material can not only produce bright red light through the stimulation of mechanical force to realize the visual transformation of force-light, but also be widely applied to many fields such as visual pressure sensing, intelligent anti-counterfeiting, electronic signature, flexible wearable sensing devices or biomedicine. Moreover, the preparation method of the present invention is simple to operate, has low equipment requirements, small reaction energy consumption, high sample yield and good reproducibility.