33 results about "Triphenyl phosphonium" patented technology

The application discloses a preparation method of beta-carotene, which comprises the following steps: 3-methyl-5-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4-pentadienyl triphenyl phosphonium salt (C15 phosphonium salt) cis-trans isomer and 2,7-dimethyl-2,4,6-octatriene-1,8-dial (C10) are dissolved in a water and a water incompatible solvent system, and Wittig reaction is generated under the action of an alkali. The reaction system can avoid that by-product inorganic salt is wrapped in the product, and the content of inorganic salt impurities in the product is reduced. In addition, the proportion of C15 phosphonium salt cis-trans isomer is controlled, a C15 phosphonium salt hydrolysis side reaction is inhibited, and the reaction yield is improved.

Triphenylphosphonium hydroxytyrosol TPP-HT, its synthesis method and application in the preparation of drugs for improving aortic endothelial cell function. TPP-HT can significantly increase the reduction of human aortic endothelial cell activity caused by saturated fatty acids, inhibit the inflammatory response and oxidative stress caused by saturated fatty acids, and at the same time increase the synthesis of ATP in vascular endothelial cells and the expression of mitochondrial complex II. By anti-inflammatory and protecting mitochondrial function, it can prevent the occurrence and development of atherosclerosis. Therefore, TPP-HT has good application prospects in preventing cardiovascular diseases such as atherosclerosis caused by high-fat-induced endothelial damage, opening up a new medical approach for preventing a series of problems of cardiovascular diseases such as atherosclerosis caused by endothelial damage due to unbalanced dietary structure, and providing a new basis for the development of new drugs.

The invention discloses a preparation method of beta-carotene. The preparation method comprises the following steps: dissolving an aqueous solution of 3-methyl-5-(2, 6, 6-trimethyl-1-cyclohexene-1-yl)-2, 4-pentadienyl triphenylphosphine salt (C15 phosphine salt) and 2, 7-dimethyl-2, 4, 6-octtriene-1, 8-dialdehyde (C10) cis-trans isomer in a solvent, carrying out wittig reaction under the action of alkali, and carrying out isomerization to obtain the product. By controlling the proportion of C10 cis-trans isomers of the reaction system, the content of the C25 aldehyde intermediate can be reduced, and the reaction yield and the product quality can be improved.

The invention belongs to the technical field of coatings, and particularly relates to an aerogel heat preservation and insulation coating, a preparation method and application. The aerogel thermal insulation coating is prepared from the following raw materials in parts by weight: 20-40 parts of deionized water; 1-2 parts of a dispersant; 10 to 20 parts of flame retardant powder I; 1-10 parts of flame retardant powder II; 1-10 parts of superfine heavy calcium carbonate; 1-5 parts of cellulose HECs; 1-2 parts of a multifunctional additive; 1-2 parts of a wetting agent; 1-2 parts of ethylene glycol; 1-2 parts of a defoaming agent; 1 to 5 parts of aerogel; 1-2 parts of a coalescing agent; 1-2 parts of a bactericide; 10 to 20 parts of an emulsion; 1-10 parts of an elastic emulsion; and 10-20 parts of hollow microspheres. The multifunctional auxiliary agent is prepared from the following raw materials: vinyl trimethoxy silane, gamma-glycidyl ether oxypropyl trimethoxy silane, n-dodecyl trimethoxy silane, 3-methyl-1-pentyne-3-alcohol and deionized water, and the multifunctional auxiliary agent is prepared from the following raw materials: trimethoxy silane, gamma-glycidyl ether oxypropyl trimethoxy silane, n-dodecyl trimethoxy silane, 3-methyl-1-pentyne-3-alcohol and deionized water. The bactericide is prepared from the following raw materials: a quaternary ammonium salt bactericide, didodecyl dimethyl dibenzyl ammonium tin chloride, dodecyl triphenyl phosphonium bromide, ditributyltin oxide and a penetrant.

The invention relates to a preparation method of methylenecyclopentane and a composition containing the methylenecyclopentane, in particular to a method for synthesizing the methylenecyclopentane by reacting substituted triphenylphosphine (such as tris (4-methoxyphenyl) phosphine and the like) with methyl iodide / methyl bromide to generate substituted methyl triphenyl phosphonium halide and then reacting with cyclopentanone through Wittig in the presence of alkali. Compared with the traditional method, the method has the advantages that the byproduct is substituted benzene (the boiling point is more than 100 DEG C), the boiling point of the substituted benzene is obviously different from that of the target product (the boiling point is 77 DEG C), methylene cyclopentane with the purity of more than 99% can be obtained through simple rectification, and the yield reaches 85-95%.

The invention discloses a pyridinedicarboxylic acid coordinated catalyst, a composite catalyst, a preparation method and an application. B is a calcium ion, a sodium ion, a magnesium ion, a lithium ion, a potassium ion, an ammonium ion, an octadecyl dimethyl benzyl ammonium ion, an octadecyl trimethyl ammonium ion, a dodecyl dimethyl benzyl ammonium ion, a dodecyl trimethyl ammonium ion, an octyl tributyl phosphonium ion, a tetrabutyl phosphonium ion, a hexyl tributyl phosphonium ion and a tributyl ethyl phosphonium ion; the ionic liquid is a tetrabutyl phosphonium ion, a tributyl hexyl phosphonium ion, a tetramethyl ammonium ion, a tetraethylammonium ion, a tetrabutyl ammonium ion, a benzyl trimethyl ammonium ion, a benzyl triphenyl phosphonium ion or a benzyl triethylammonium ion; m is Cr, Mo or W; r is a C1-C10 alkyl group; x is an integer between 1 and 20; and y is an integer between 1 and 40, so that the p-nitrotoluene oxidation reaction selectivity and the p-nitrotoluene conversion rate can be improved.

The invention discloses a eutectic solvent as well as a preparation method and application thereof, and belongs to the technical field of styrene adsorption. The deep eutectic solvent comprises alpha-phenethyl alcohol, acetophenone and methyl triphenyl phosphorus bromide, and the adsorption effect of styrene is improved based on multiple and reversible physical and chemical synergistic effects generated between all components of the solvent and styrene molecules. Strong ion-pi interaction is generated between phosphorus cations of methyltriphenylphosphonium bromide in the solvent and benzene ring electron cloud of styrene to form main adsorption driving force; a benzene ring of acetophenone and a benzene ring of styrene form a pi-pi accumulation effect, so that the capturing capability is further enhanced; meanwhile, a hydrogen bond network formed by hydroxyl of alpha-phenethyl alcohol and two receptors constructs a solvent microenvironment with adjustable polarity and matched space, which is more beneficial to dissolution and enrichment of styrene molecules in thermodynamics. The acting forces synergistically realize high-efficiency and high-selectivity reversible adsorption of styrene.

The invention discloses a preparation method of beta-apo-8 '-carotene acid ethyl ester, which comprises the following steps: reacting C5 triphenyl phosphonium salt with C10 monoaldehyde methylal, hydrolyzing to obtain 2, 6, 11-trimethyl-12-oxododecane-2, 4, 6, 8, 10-pentaenoic acid ethyl ester, and reacting the 2, 6, 11-trimethyl-12-oxododecane-2, 4, 6, 8, 10-pentaenoic acid ethyl ester with C15 triphenyl phosphonium salt to obtain the beta-apo-8'-carotene acid ethyl ester. Reaction raw materials are simple and easy to obtain, side reactions of generating beta-carotene from < 2 > C15 + C10-> C40 are avoided, and the product purity is improved; only two-step reaction is needed, the synthesis steps are few, and the operation is simple; raw materials with high dangerousness are not used, no other toxic and harmful by-product residues exist in the product, and the product meets the use standard; therefore, the whole preparation method is high in process safety, low in industrialization difficulty, favorable for reducing the production cost of the beta-apo-8 '-carotene acid ethyl ester and suitable for large-scale industrial production.

The invention discloses a synthesis method and application of (3S)-1, 3-dimethyl piperazine-2-ketone, and the method comprises the following steps: S101, dissolving D-alanine methyl ester hydrochloride in a first organic solvent, then adding alkali A and 2-methylaminoethanol, after addition, heating to 60-150 DEG C, carrying out stirring reaction for 8-20 hours, after the reaction is completed, carrying out first post-treatment on the reaction liquid, and carrying out second post-treatment on the reaction liquid, so as to obtain the (3S)-1, 3-dimethyl piperazine-2-ketone; the crude product of (R)-2-amino-N-(2-hydroxyethyl)-N-methyl propionamide is obtained; and S102, dissolving (R)-2-amino-N-(2-hydroxyethyl)-N-methylpropanamide in a second organic solvent, then adding (1, 2-bis (ethoxycarbonyl) hydrazino) triphenylphosphonium trifluoromethanesulfonate and alkali B, after addition, carrying out stirring reaction at 15-40 DEG C for 8-20 hours, and after the reaction is completed, carrying out secondary post-treatment on the reaction liquid to obtain the target (3S)-1, 3-dimethyl piperazine-2-ketone.

The invention belongs to the technical field of preparation of hexafluoroisobutylene, and particularly relates to a preparation method of hexafluoroisobutylene, which comprises the following steps: adding an anhydrous tetrahydrofuran solvent into a high-pressure kettle under the condition of maintaining an inert atmosphere in the whole process; then adding a methyl triphenyl phosphorus bromide raw material, controlling the temperature in the high-pressure kettle to be stabilized at 0 DEG C in the process, adding a preset equivalent amount of organic alkali into the high-pressure kettle, continuously stirring and reacting for 4 hours at 0 DEG C in an inert atmosphere to obtain a tetrahydrofuran solution of methylene triphenyl phosphorus serving as a ylide reagent, reducing the temperature to-30 DEG C, and reacting for 2 hours at 0 DEG C in an inert atmosphere to obtain a tetrahydrofuran solution of methylene triphenyl phosphorus serving as a ylide reagent; introducing anhydrous hexafluoroacetone into the high-pressure kettle, reacting for 10 hours, slowly heating to 30 DEG C, and continuously stirring to react for 10 hours; according to the method, the reaction process is simple, the reaction conditions are mild, generated by-products are harmless and convenient to treat, continuous operation of a reaction device is guaranteed, the prepared hexafluoroisobutene product is high in purity and yield, and the preparation method has excellent industrial application prospects.

The invention relates to the technical field of thermoplastic elastomers, in particular to a disposable visible double-lumen bronchial cannula and a preparation method thereof. The preparation method comprises the following steps: mixing an ethylene-propylene thermoplastic elastomer, polypropylene resin, an antibacterial silver material and an antibacterial zinc oxide material, and carrying out melt extrusion, cooling and traction to obtain the pipe. And the pipe is sequentially subjected to water washing, alcohol washing, drying and plasma treatment, and the pretreated pipe is obtained. The preparation method comprises the following steps: adding raw materials such as hydroxyethyl acrylamide, acrylic acid, polyvinylpyrrolidone, allyl quaternary ammonium salt, allyl triphenyl phosphonium bromide and 1-allyl imidazole to obtain an antibacterial hydrogel solution; and soaking the pretreated pipe in the antibacterial hydrogel solution, taking out the pipe, and performing ultraviolet irradiation to obtain a finished product. The finished product prepared by the invention has excellent antibacterial property and lubricity, so that the finished product has a wide application prospect in the technical field of thermoplastic elastomers.

The application discloses a preparation method of 5-methyl furfural and derivatives thereof, and belongs to the technical field of preparation of crude drugs. Deionized water, glyoxylic acid and a catalyst are stirred and uniformly mixed, an alkali liquor is used to adjust the pH to 4.5-5.5, then the mixture is added dropwise into a tert-butyl alcohol solution containing 2-methyl furan, and the reaction is carried out under the condition of temperature rising and stirring; the reaction is continued under the condition of temperature dropping and adding sodium hypochlorite solution, and 5-methyl furfural is obtained; the catalyst is obtained by the reaction of pentaerythritol dimethyl ether and (2-aminoethyl) triphenyl phosphonium bromide. The 5-methyl furfural prepared by using the catalyst has high yield and purity, and the 5-methyl furfural derivatives prepared by using 5-methyl furfural as a raw material also have high yield and purity.

The application belongs to the technical field of biological medicine, and particularly relates to a new indocyanine green delivery system targeting mitochondria of tumor cells and a preparation method thereof. The new indocyanine green and diamine are used to prepare aminylated new indocyanine green through a substitution reaction, and then the aminylated new indocyanine green is condensed with 3-propylcarboxyl triphenyl phosphonium bromide to prepare a triphenyl phosphonium salt-new indocyanine green conjugate; hydroxyethyl starch and perfluorooctadecanoic acid are used to prepare perfluorooctadecanoic acid hydroxyethyl starch ester through a condensation reaction, and then the perfluorooctadecanoic acid hydroxyethyl starch ester and the triphenyl phosphonium salt-new indocyanine green conjugate are dissolved in dimethyl sulfoxide to prepare the new indocyanine green delivery system targeting mitochondria of tumor cells. The delivery system has the effect of slow release of the triphenyl phosphonium salt-new indocyanine green conjugate, and has a stronger in-vitro photodynamic effect and a stronger photodynamic killing effect on tumor cells than the triphenyl phosphonium salt-new indocyanine green conjugate.

The application relates to a compound for improving vascular endothelial cell function, a preparation method and application thereof. The compound is prepared by taking tyrosol, dopamine, substituted cinnamic acid or 5-carboxyl pentyl-triphenyl phosphonium bromide as a starting material, and then performing amidation or esterification reaction with adamantylamine and adamantane acid. The compound has a significant inhibitory effect on the inflammation reaction of endothelial cells induced by palmitate (PA) as an anti-inflammatory molecule, can be used for preparing drugs for hyperlipidemia and related cardiovascular diseases, treating vascular endothelial injury diseases, treating hyperlipidemia, atherosclerosis and related cardiovascular diseases, and has the potential of being developed into innovative drugs for treating hyperlipidemia, atherosclerosis and related cardiovascular diseases with high efficiency and low toxicity.

The invention discloses a preparation method of unsaturated fatty acid cis-9-tetradecenoic acid, and belongs to the technical field of organic compound preparation. The preparation method provided by the invention comprises the following steps: reacting azelaic acid monomethyl ester with a borane reagent to obtain 9-hydroxy methyl nonanoate; then, the 9-formyl methyl nonanoate reacts with a Dess-Martin oxidizing agent, and 9-formyl methyl nonanoate is obtained; then reacting with n-amyl triphenyl phosphorus bromide or diethyl amyl phosphonate in the presence of bis (trimethylsilyl) sodium amide, so as to obtain cis-9-tetradecenoic acid methyl ester; and finally, carrying out hydrolysis reaction to obtain the cis-9-tetradecenoic acid. According to the method disclosed by the invention, the high-purity cis-9-tetradecenoic acid is efficiently and highly selectively prepared by taking the cheap and easily available monomethyl azelate as a starting raw material through key steps of reduction, oxidation, high-selectivity Wittig alkylenation and the like, and large-scale production is facilitated.

The method comprises the following steps: adding a quinoxaline ketone compound as shown in a formula (I), a difluoromethyl triphenyl phosphonium iodide salt compound as shown in a formula (II) and alkali into a reaction solvent, carrying out stirring reaction under the conditions of nitrogen protection and blue light illumination, and after the reaction is finished, carrying out filtering, washing and drying to obtain the difluoroquinoxaline ketone derivative. The reaction equation is as follows: # imgabs0 #, the substituent R1 is selected from H or methyl, the substituent R2 is selected from H, methyl or methoxyl, the substituent R3 is selected from H, methyl, ester group, alkynyl, phenyl, naphthyl or substituted phenyl, the substituent R2 is selected from H, methyl or methoxyl, and the substituent R3 is selected from H, methyl, ester group, alkynyl, phenyl, naphthyl or substituted phenyl. The substituent group of the substituted phenyl is methyl or halogen, and n is 0, 1 or 2. The preparation method of the difluoromethylated quinoxalinone derivative has the advantages of simple operation process, cheap and easily available raw materials, mild reaction conditions, greenness and environmental protection, and the difluoromethylated quinoxalinone derivative has antifungal activity.

The present application relates to the technical field of thermoplastic elastomer, in particular to a disposable visual double-lumen bronchial cannula and a preparation method thereof.The ethylene-propylene thermoplastic elastomer, polypropylene resin, antibacterial silver material and antibacterial zinc oxide material are mixed, and then melt extrusion, cooling and traction are carried out to obtain a pipe material.The pipe material is sequentially subjected to water washing, alcohol washing, drying and plasma treatment to obtain a pretreated pipe material.The antibacterial hydrogel solution is obtained by adding hydroxyethyl acrylamide, acrylic acid, polyvinylpyrrolidone, propenyl quaternary ammonium salt, allyl triphenyl phosphonium bromide and 1-allyl imidazole.The pretreated pipe material is soaked in the antibacterial hydrogel solution, and then the finished product is obtained after ultraviolet irradiation.The finished product prepared by the present application has excellent antibacterial property and lubricity, and therefore has a wide application prospect in the technical field of thermoplastic elastomer.

The application discloses a kind of radiation-resistant sealing materials for photoetching process and preparation method thereof, belong to high molecular sealing material technical field.The material is made of fluorine rubber raw rubber, 1-iodine perfluorohexane or 1-iodine perfluorooctane, reinforcing filler, bisphenol AF vulcanizing agent and benzyl triphenyl phosphonium chloride accelerator, etc.According to specific weight part, it is made by batch dropwise mixing and gradual temperature two-step vulcanization.The application utilizes perfluoroalkyl iodide under plasma C-I bond preferentially homolysis generates I·, terminates fluorine rubber free radical chain degradation;And through theoretical calculation and ion chromatography verification, ensure that processing process does not decompose, no corrosive iodine ion release in service.The application breaks the application technology prejudice of halogen, solves the defect that conventional fluorine rubber particle releases high, plasma life is short, avoids the problem that perfluoroether rubber is high in cost and difficult to process, the obtained material is low in particle release amount, long in radiation life, small in compression permanent deformation, adapts to 7nm and below node semiconductor equipment sealing demand, easy to scale up.

The invention discloses a preparation method of a cyclopofol intermediate cyclopropyl [2-hydroxy-3-(propyl-2-yl) phenyl] ketone. 2-isopropyl phenol is used as a starting material and reacts with a halogenating reagent under the acidic condition to obtain a compound (A), the compound (A) reacts with a benzyl reagent under the condition of an alkaline reagent to generate a compound (B), the compound (B) and cyclopropanecarbonyl chloride are subjected to a Friedel-Crafts alkylation reaction under the condition of Lewis acid to obtain a compound (C), and the compound (C) and cyclopropanecarbonyl chloride are subjected to a Friedel-Crafts alkylation reaction under the condition of Lewis acid to obtain the compound. The compound (C) finally generates an intermediate compound (D) cyclopropyl [2-hydroxy-3-(propyl-2-yl) phenyl] ketone under the condition of a hydrogenation reagent, the molar yield can reach 85 +%, and the intermediate compound (D) and methyl triphenyl phosphorus bromide are subjected to ylide reaction to obtain 2-(1-cyclopropyl vinyl)-6-(propyl-2-yl) phenol. Splitting (R)-(+)-1-phenylethyl isocyanate to obtain {[(1R)-1-phenylethyl] amino} methanoic acid-6-[(1R)-1-cyclopropylethyl]-2-(propyl-2-yl) phenyl ester with a single configuration, wherein the {[(1R)-1-phenylethyl] amino} methanoic acid-6-[(1R)-1-cyclopropylethyl]-2-(propyl-2-yl) phenyl ester has a single structure; the purity of the finished cyclopofol finished product obtained through refining can reach 99.9%, the cost is low, operation is easy and convenient, and industrial production is easy.

The application discloses a preparation method of 2-methyl-4-chloro-2-butenoic acid ethyl ester, which comprises the following steps: taking an ethoxycarbonyl ethyl triphenyl phosphonium salt aqueous solution and a monochloroacetaldehyde aqueous solution as raw materials, and performing a Wittig reaction under the action of an alkali to obtain 2-methyl-4-chloro-2-butenoic acid ethyl ester, wherein the content of alkali metal ions in the 2-methyl-4-chloro-2-butenoic acid ethyl ester is 1-3 ppm. The method has the advantages of high reaction yield, simple and mild process conditions, moderate residual amount of metal ions in the product, good storage stability of the product and the like.

The application discloses a near-infrared film and a preparation method thereof. The near-infrared film is prepared by the following method: mixing cadmium bromide, antimony bromide and propyl triphenyl phosphonium bromide, wherein the ratio of the sum of the molar amounts of the cadmium bromide and the antimony bromide to the molar amount of the propyl triphenyl phosphonium bromide is 1:2.001; the molar amount of the antimony bromide is 0.1% to 50% of the molar amount of the cadmium bromide; then adding a polar solvent to dissolve and filter to obtain a precursor solution, and finally using the precursor solution to prepare the near-infrared film. The application introduces the antimony element into the organic-inorganic hybrid cadmium halide, combines ligand regulation engineering and halogen regulation engineering, and prepares a novel near-infrared film. The near-infrared film realizes near-infrared light emission with a peak position of 760 nm for the first time by using the antimony element, the light emission is not affected by a matrix, the light emission efficiency is high, the stability is high, the film forming performance of the film is good, the preparation method is simple and easy to implement, and the near-infrared film has low cost and large-scale production potential.

The application discloses a kind of fluorine rubber aramid fiber composite materials, including the following weight parts of component: fluorine rubber 100 parts, 2,2‑bis‑(4‑hydroxyphenyl) hexafluoropropane 2‑3 parts, benzyl triphenyl phosphonium chloride 0.5‑2 parts, magnesium oxide 3‑5 parts, calcium hydroxide 5‑8 parts, barium sulfate 20‑35 parts, iron red 3‑5 parts, aramid fiber 1‑8 parts, water-soluble polyphenol compound 0.1‑1 part, dispersion aid 3‑10 parts.The application also discloses the preparation method of fluorine rubber aramid fiber composite material, including aramid fiber shear peeling and surface modification, then with silicon powder hybridization dry, and then through internal mixer and open mill, hybrid aramid fiber is mixed into fluorine rubber, finally, the composite material is prepared by two-stage vulcanization.The application solves the problem that the interface of fluorine rubber and aramid fiber in the prior art is weak, which leads to poor physical and mechanical properties of the material, and aramid fiber is easy to agglomerate in fluorine rubber, thereby improving the tensile properties, tear resistance, compression set, heat and oxygen aging resistance and oil resistance of fluorine rubber.

The invention discloses a preparation method of a chlorine-free and fluorine-free combined vulcanizing agent, which comprises the following steps: a) adding benzyl triphenyl phosphorus chloride and an organic solvent into a reaction kettle, and heating and refluxing to completely dissolve the benzyl triphenyl phosphorus chloride; b) slowly adding strong base and an organic solvent into the solution in the step a), and reacting for 2-3 hours; c) adding organic acid into the mixed solution in the step b to neutralize the pH value to 7.5-9; d) adding a bisphenol vulcanizing agent into the reaction system in the step c, and heating and refluxing to obtain a co-melt of benzyltriphenylphosphine hydroxide and the bisphenol vulcanizing agent; e) heating the reactant obtained in the step d to remove the solvent, and repeatedly washing until the detected chloride ion content in the water layer at the upper part is lower than 5ppm; and f) after moisture removal, granulating to obtain the uniform semitransparent granular chlorine-free fluorine combined vulcanizing agent. The fluorine combined vulcanizing agent with the chlorine ion content of less than 5 ppm and stable high-temperature performance is provided, and fluororubber produced and prepared by adopting the fluorine combined vulcanizing agent is very friendly to electronic products.

The invention discloses high-impact resin for a PDI isocyanate modified copper-clad plate as shown in a formula (I), a resin composition and a preparation method of the resin composition. The preparation method of the resin comprises the following steps: reacting PDI isocyanate, bisphenol F, ethyltriphenylphosphine acetate and methylbenzene to prepare isocyanate modified bisphenol F; and adding trioxymethylene, aniline and a quaternary ammonium salt catalyst for reaction, and then performing post-treatment to obtain the product. The resin composition for the copper-clad plate is formed by mixing PDI isocyanate modified high-impact resin for the copper-clad plate, DOPO-NQ type phosphorus-containing epoxy resin, TGIC epoxy resin, phosphorus-containing phenolic resin, an imidazole catalyst and butanone. According to the invention, the PDI isocyanate modified high-impact resin for the copper-clad plate is good in performance, and the resin composition can provide excellent comprehensive performance of the copper-clad plate resin, such as high impact (high toughness), high Tg, excellent halogen-free flame retardance and good plate processability, and meets the performance requirements of the resin for the high-end copper-clad plate. (I).

The present invention relates to the use of a triphenylphosphonium carboxylate of the following formula (I) as a photobase generator in a photopolymerizable composition comprising at least one monomer for the preparation of a photopolymer by curing the composition by irradiation with light of a suitable wavelength: wherein R1 and R2 are each independently selected from-H and-OCH3, at least one of R1 and R2 represents-OCH3, and wherein R3 is selected from the group consisting of-H and-CH3 and X is absent or selected from the group consisting of chemical bonds:-CH2-,-O-CH2-,-CH2-O-,-C (= O)-,-O-, and-S-; and the corresponding novel triphenylphosphonium carboxylate salts of formula (I).

The invention relates to the technical field of separation, and particularly discloses a method for recovering volatile organic compounds in waste gas. The method for recovering the volatile organic compounds in the waste gas comprises the following steps: S1, introducing the waste gas and an absorption solvent into an absorption tower for absorption, and collecting a rich solution; s2, the rich solution is introduced into a desorption tower for indirect heating desorption, organic steam is collected and condensed, condensate is collected, and recycled organic matter is obtained; the absorption solvent is prepared from the following raw materials in percentage by weight: 25 to 35 percent of tributyl methyl phosphonium iodide, 15 to 25 percent of isopropyl triphenyl phosphonium iodide, 3 to 7 percent of (fluoromethyl) tetrafluoro boron ester triphenylphosphine, 3 to 7 percent of chlorinated (1-butyl-3-methylimidazole) and 35 to 50 percent of an alcohol-containing compound and / or a carboxylic acid-containing compound. According to the method, the absorption rate is larger than 95%, recovery of volatile organic compounds in waste gas is improved, and market requirements are met.

The invention discloses a low-temperature degumming agent for an optical glass matrix as well as a preparation method and application of the low-temperature degumming agent. The degumming agent comprises the following components in percentage by weight: 30-45% of a composite solvent system J, 10-20% of a glue layer cracking agent K, 5-15% of a glass passivator L, 3-8% of a penetration enhancer M and the balance of deionized water. Wherein J is composed of 2, 2, 3, 3-tetrafluoropropyl methyl ether and gamma-valerolactone according to a ratio of 3: 1; k is composed of tetrabutyl ammonium tetrafluoroborate and butyl triphenyl phosphonium chloride according to a ratio of 2: 1; l is prepared from hydrogen-terminated polydimethylsiloxane and zirconium oxide acetylacetonate; and M is perfluorohexyl ethanol. The preparation method comprises the steps of dissolving, ultrasonic dispersion, mixing, filtering and the like. The degumming agent disclosed by the invention can rapidly and completely peel off UV glue and epoxy resin glue within 10 minutes by working at a low temperature of 35-55 DEG C, meanwhile, by virtue of a unique passivation protection mechanism, the weight loss ratio of an optical glass matrix is less than or equal to 0.003 mg / cm, the light transmittance retention rate is more than or equal to 99.5%, and a functional film layer does not fall off, so that the problems of high-temperature damage and chemical erosion in the traditional technology are perfectly solved.

The invention discloses a high-transparency manganese-based halide luminescent organogel and a preparation method thereof, and the preparation method comprises the following steps: dissolving manganese bromide and isoamyl triphenyl phosphonium bromide in 1-vinyl-2-pyrrolidone to obtain a mixture; adding 1-hydroxycyclohexyl phenyl ketone into the mixture, and carrying out ultrasonic treatment to obtain a transparent solution; and carrying out a photocuring reaction on the transparent solution to obtain the high-transparency manganese-based halide luminous organogel. According to the preparation method, all the raw materials are directly mixed to prepare a uniform and transparent solution, under the irradiation of ultraviolet light, polymerization reaction of monomers is synchronously realized to form a high-transmittance gel network and in-situ generation of a manganese-based halide light-emitting unit, and finally, the amorphous manganese-based halide light-emitting organic gel with high transparency is obtained.

The invention discloses a preparation method of epoxy curing resin with low maintenance requirement and a product thereof. The method comprises the following steps: adding 3-aminophenylboronic acid, 3-amino-1, 2-propylene glycol and anhydrous magnesium sulfate into methanol, dissolving, carrying out rotary evaporation to remove methanol, stirring the obtained product and a polyurethane prepolymer in N, N-dimethylformamide, and carrying out rotary evaporation to remove DMF (Dimethyl Formamide) to obtain a curing agent A; refluxing and stirring epichlorohydrin, diallyl bisphenol A and ethyl triphenyl phosphine acetate, cleaning and purifying, and evaporating to remove methylbenzene, so as to obtain resin B; the preparation method comprises the following steps: adding epoxy resin E12, 1 resin B, polycaprolactone PCL, a curing agent A and zinc acetylacetonate into N, N-dimethylformamide, heating and stirring until all the components are dissolved, thereby obtaining liquid epoxy resin. According to the invention, the epoxy cured resin is endowed with self-repairing capability through the principle of polymer chain segment recombination and dynamic exchange, so that the epoxy cured resin can be self-maintained in service life at low cost, and potential recoverability and environmental protection property are brought.

The invention belongs to the technical field of pesticide compounds, and particularly relates to coumoxystrobin derivatives containing triphenylphosphonium salt groups and a preparation method and application of the coumoxystrobin derivatives. The coumoxystrobin derivative has broad-spectrum and excellent bactericidal activity, and particularly has an excellent effect on plant diseases caused by ascomycetes, basidiomycetes, deuteromycetes and oomycetes. The inhibition rate of the preferable compound Ic-37 on various pathogenic bacteria at the low concentration of 0.05 mM is remarkably superior to that of maternal coumoxystrobin, and the synergistic interaction effect of the structural design is proved.