111 results about "Hydroxynaphthalenes" patented technology

The invention provides polyester and a preparation method and application thereof, the polyester comprises a structural unit derived from the following monomer components: at least one monomer component I selected from hydroxybenzoic acid or hydroxynaphthoic acid; and at least one monomer component II, wherein the monomer component II is selected from p-hydroxybenzoic acid containing a substituent group. A small amount of the monomer component II is introduced into the polyester material, interaction points are provided for chain segments of the polymer, the chain segments are promoted to form a branched structure, and therefore the melt strength of the polymer is well improved.

The invention discloses a cool breathable fiber and a preparation method thereof, and relates to the field of fibers. When the cool-feeling breathable fiber is prepared, shell powder sequentially reacts with 3-chloropropyltrimethoxysilane, 2, 6-dihydroxy naphthol and 3, 3-diphenyl-2-propyne-1-alcohol, and functionalized shell powder is prepared; the preparation method comprises the following steps: reacting (formylmethyl) diethyl phosphate with (4-pyridyl) acetone, firstly polymerizing with dimethyl terephthalate and ethylene glycol, and then reacting with N-[4-(aminomethyl) phenyl] guanidine to prepare modified polyester; and finally, mixing the modified polyester, the functionalized shell powder and zinc acetate, and spinning to obtain the cool breathable fiber. The cool breathable fiber prepared by the invention has flame-retardant, durable and antibacterial capabilities.

To provide a chemically amplified positive resist composition that can give a resist film which has extremely high isolated space resolution, small LER, excellent rectangularity, and on which formation of a resist pattern with suppressed etching resistance or pattern collapse is possible, and a resist pattern forming method using the chemically amplified positive resist composition.SOLUTION: A chemically amplified positive resist composition contains: (A) a base polymer which includes a repeating unit derived from hydroxystyrene or hydroxynaphthalene and a repeating unit derived from hydroxystyrene in which a hydroxy group is protected by acid-labile group or hydroxynaphthalene in which a hydroxy group is protected by acid-labile group, and in which dissolubility to alkali aqueous solution increases by acid action, and a dispersion degree is 1.0 to 1.19; (B) photo-acid generator expressed by the following formula (B); and (C) organic solvent.SELECTED DRAWING: None

The invention relates to a fluorescent probe for hypochlorous acid detection and a preparation method and application thereof, the chemical name of the fluorescent probe for hypochlorous acid detection is 5-butyl-10, 10-difluoro-9-(4-(methylthio) phenyl)-5-hydro-4H, 10H-9 lambda 4, 10 lambda 4-benzo [de] [1, 3, 2] oxazaboraza [6, 5-g] isoquinoline-4, 6-diketone, and the structural formula of the fluorescent probe for hypochlorous acid detection is as shown in the following formula I. The invention further discloses a preparation method of the fluorescent probe for hypochlorous acid detection. According to the fluorescent probe for hypochlorous acid detection, N-butyl-3-aldehyde-4-hydroxy-1, 8-naphthalimide and (E)-2-butyl-6-hydroxy-5-(((4-(methylthio) phenyl) imino) methyl)-1H-benzo [de] isoquinoline-1, 3 (2H)-diketone are used as raw materials, and the fluorescent probe can be used for detecting hypochlorous acid. Compared with the prior art, the fluorescent probe for hypochlorous acid detection is simple and convenient in synthesis method, simple and easily available in raw materials, good in hypochlorous acid selectivity, relatively high in sensitivity and large in Stokes shift, and has a very good application prospect in hypochlorous acid detection.

The invention discloses a polyphenyl ether resin composition, a polyphenyl ether composite material and a preparation method and application thereof. The polyphenyl ether resin composition is obtained by reacting polyphenyl ether and naphthoic acid compounds in a melt, the polyphenyl ether has a repeating unit with the following structure: R1, R2, R3 and R4 are respectively and independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, halogenated alkyl, alkoxy or halogenated alkoxy; the naphthoic acid compound is at least one of naphthoic acid or hydroxyl naphthoic acid. Compared with polyphenyl ether resin, the polyphenyl ether resin not only can improve the gas barrier property of the polyphenyl ether composite material in a melt, but also can improve the high-temperature injection molding processing stability of the polyphenyl ether composite material.

The present invention provides a method for preparing CI Pigment Orange 68, belonging to the technical field of pigment preparation. 2-hydroxy-1-naphthaldehyde and 5,6-diaminobenzimidazolone are subjected to a condensation reaction in an acidic environment to prepare a Schiff base. The prepared Schiff base is subjected to a complexation reaction with nickel chloride and sodium acetate in an acidic environment. After the complexation reaction is completed, CI Pigment Orange 68 is obtained through post-processing. Compared with the prior art, this method not only avoids the use of the toxic solvent DMF, but also reduces the temperature required for the reaction, can reduce the output of organic waste liquid, has low cost, is environmentally friendly, and is safe to operate. The prepared CI Pigment Orange 68 has excellent properties such as high hue saturation, high transparency, bright color, strong hydrophilicity, and good dispersion stability.

The present application relates to the field of fluorescent carbon nanomaterials, in particular to a method for preparing pure purple light oxygen-doped carbon quantum rings with a half-peak width of 18 nm and a quantum yield close to 100% and applications thereof. The present application uses 2,3-dihydroxynaphthalene as a carbon source precursor, and prepares narrow-band purple light carbon quantum rings with a quantum yield close to 100% through a solid-phase catalytic reaction. The carbon quantum rings prepared by the present application have a hexagonal ring structure with oxygen doping, and have a wide application prospect in the field of display devices.

The invention provides a purification method of a high-purity electronic-grade photoacid generator derived from (4, 7-dihydroxy-1-naphthyl) dimethyl sulfonium trifluoromethanesulfonate. The problem that photo-acid cannot be purified by traditional recrystallization or directly through an ion exchange column and the like is solved, and the electronic grade standard is achieved. The preparation method comprises the following steps: firstly synthesizing (4, 8-dihydroxy-1-naphthyl) dimethyl sulfonium hydrochloride, then reacting with sodium trifluoromethanesulfonate to generate a crude product (4, 7-dihydroxy-1-naphthyl) dimethyl sulfonium trifluoromethanesulfonate, removing impurities from ethyl acetate, recrystallizing by using methanol and dichloromethane to obtain a pure product, and finally adsorbing by using resin to obtain the high-purity electronic-grade photoacid generator. According to the invention, the stability is high, the metal ion content is low, the purification process is convenient to process, the product is used as a photoresist-level core main material, the product is widely applied in the fields of semiconductor photoresist, other imaging systems, photocureable coatings and the like, the market scale is continuously expanded, and the product is an indispensable key material in semiconductor manufacturing and other related fields.

The invention relates to a method for preparing a hydroxyl naphthaldehyde derivative by using a cobalt complex, which comprises the following step: by taking naphthol and paraformaldehyde as raw materials and the cobalt complex containing an ortho-carborane benzothiazole structure as a catalyst, reacting at room temperature to synthesize the hydroxyl naphthaldehyde derivative. Compared with the prior art, the cobalt complex containing the ortho-carborane benzothiazole structure is applied to the reaction for catalytically synthesizing the hydroxyl naphthaldehyde derivative through the one-pot method, the use equivalent of the catalyst is low, the reaction condition is mild, the substrate universality is high, and the yield is high.

The invention discloses a solid conductive powder coating composition and a preparation method thereof, and belongs to the technical field of powder coatings. The preparation method comprises the following steps: adding epoxy resin, modified fibers, modified graphene oxide, modified 1, 6-dihydroxynaphthalene, carbon black, 2-methylimidazole, a flatting agent and barium sulfate into a stirrer, mixing at a high speed of 300-400r / min for 5-10min, then putting the mixed material into a double-screw extruder for melt extrusion, tabletting, cooling, crushing and sieving to obtain the solid conductive powder coating composition. The solid conductive powder coating composition disclosed by the invention has good conductivity and also improves the corrosion resistance.

The invention discloses an infrared barrier polyurethane coating and a preparation method thereof, and relates to the technical field of coatings. When the infrared barrier polyurethane coating is prepared, 7-cyano-8-hydroxy-1, 6-naphthyridine and pent-4-enohydrazide are subjected to a reaction, and a pentenyl triazole monomer is prepared; polymerizing a pentenyl triazole monomer and hexenyl ethylene carbonate, and coating the cesium tungsten bronze powder with the polymerized pentenyl triazole monomer and hexenyl ethylene carbonate to prepare modified cesium tungsten bronze powder; reacting the cardanol diglycidyl ether with carbon dioxide to obtain cyclic carbonated cardanol; the cyclic carbonated cardanol, the modified cesium tungsten bronze powder, functional microspheres, cyclohexanone, isophorone diamine and 1, 3-bis (3-aminopropyl)-1, 1, 3, 3-tetramethyldisiloxane are uniformly mixed, and the infrared barrier polyurethane coating is prepared. The infrared barrier polyurethane coating prepared by the invention has excellent flame retardance, aging resistance and infrared barrier property.

The present invention provides an enzymatic serum albumin fluorescent probe, a synthesis method, and an application thereof. The fluorescent probe has a structure represented by formula (I), and its preparation process is as follows: (1) 3-hydroxy-1,8-naphthylic anhydride and (S)-1-(4-pyridyl)ethylamine are added to an organic solvent, heated to reflux, and after the reaction is complete, an intermediate product represented by formula (II) is isolated; (2) the intermediate product represented by formula (II) and a base are added to an organic solvent, stirred in an ice-water bath until uniformly mixed, cyclopropylcarbonyl chloride is added dropwise, stirring is continued until the reaction terminates, and the enzymatic serum albumin fluorescent probe of the present invention is isolated. The fluorescent probe of the present invention has simple synthesis steps, high sensitivity, and good selectivity, and can achieve accurate quantification of HSA in serum and urine, and has good application prospects.

The method for manufacturing an intermediate compound for shikonin synthesis of the present invention comprises the steps of: reacting 1,5-dihydroxynaphthalene with dimethyl sulfate to prepare 1,5-dimethoxynaphthalene; reacting 1,5-dimethoxynaphthalene with N-bromosuccinimide (NBS) to prepare 1,5-dibromo -4,8-dimethoxynaphthalene; introducing a methoxy group into 1,5-dibromo-4,8-dimethoxynaphthalene using copper iodide (CuI) and 1,10-phenanthroline as a catalyst to prepare 1,4,5,8-tetramethoxynaphthalene; performing formylation of 1,4,5,8-tetramethoxynaphthalene using phosphoryl chloride (POCl3) to prepare 2-formyl-1,4,5,8-tetramethoxynaphthalene; and forming a boron complex using pinacolborane (HBpin) and 3,3-dimethylallyl bromide and reacting the boron complex with 2-formyl -1,4,5,8-tetramethoxynaphthalene to prepare a prenylated shikonin intermediate. Compared to conventional synthetic methods, the method of the present invention offers milder reaction conditions, shorter reaction time, and improved yield, thereby greatly enhancing the economic feasibility of shikonin synthesis.

Disclosed in the present invention are a polyphenylene ether resin composition and a polyphenylene ether composite, and preparation methods therefor and the use thereof. The polyphenylene ether resin composition of the present invention is obtained by reacting polyphenylene ether with a naphthoic acid compound in a melt. The polyphenylene ether has a repeat unit of the structure below: (I), wherein R1, R2, R3 and R4 are each independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbyloxy, or halohydrocarbyloxy. The naphthoic acid compound is at least one of naphthoic acid or hydroxynaphthoic acid. Compared with a polyphenylene ether resin, in a melt, the polyphenylene ether resin composition can not only improve the gas barrier property of the polyphenylene ether composite, but also improve the processing stability of the polyphenylene ether composite during high-temperature injection molding.

The invention belongs to the technical field of perovskite cells, and particularly discloses high-orientation perovskite, a preparation method and a solar cell prepared from the high-orientation perovskite, and the high-orientation perovskite comprises a mixture of naphthalene derivatives of sulfonic acid groups and amido, a perovskite component and a precursor solution, the mixture of naphthalene derivatives of sulfonic groups and amido is a mixture of potassium 6-hydroxy-2-naphthalene sulfonate and 6-bromo-2-naphthylamine hydrochloride, the molar mixing ratio of the potassium 6-hydroxy-2-naphthalene sulfonate to the 6-bromo-2-naphthylamine hydrochloride is 1: 0-1: 1, the perovskite component mainly comprises ABX3, and A is at least one of Cs, FA and MA; b is at least one of Pb and Sn; and X is I. According to the invention, crystal lattices are anchored through coordination of sulfonate radicals / hydroxyl radicals and Pbas, occupation of ammonium radicals on FAvacancies and the like, aromatic interaction among naphthalene rings in molecules is utilized to synergistically guide perovskite to orderly grow out of a (100) plane, inhibit lattice inclination and defect formation and regulate and control the orientation of perovskite crystals, so that the perovskite film with high orientation is obtained, and the perovskite film has good application prospects. And the photovoltaic performance of the perovskite solar cell is improved.

This invention discloses a two-photon fluorescent dye, prepared as follows: 6-hydroxy-2-naphthaldehyde reacts with a dihaloalkane under alkaline conditions to obtain a monohaloalkane-based aryl ether, which is then reacted with an aqueous trimethylamine solution to prepare S1; diethyl 4-(4-tolyl)pyridine-2,6-dicarboxylate reacts with N-bromosuccinimide to obtain a brominated product, which is then reacted with triphenylphosphine to prepare S2. After intermediates S1 and S2 react under strongly alkaline conditions, the product is then hydrolyzed to prepare the target product. This dye exhibits good cell membrane permeability, good dispersion in the cytoplasm, preferentially targets organelles in the cytoplasm, is water-soluble, has very low toxicity, and a high two-photon absorption interface, making it suitable for two-photon fluorescence confocal microscopy imaging.

This application relates to the field of polishing slurry technology, and in particular to cerium oxide polishing slurry, its preparation method and application. The cerium oxide polishing slurry includes a solvent and a solute. The solvent includes water, and the solute includes cerium oxide, 4-sulfonylcalix[6]arene, sodium 2,3-dihydroxynaphthalene-6-sulfonate, a lubricant, a zwitterionic dispersant and a pH adjuster. In the cerium oxide polishing slurry, the mass percentage of cerium oxide is 4.0%~13.0%, the mass percentage of 4-sulfonylcalix[6]arene is 0.3%~1.3%, the mass percentage of sodium 2,3-dihydroxynaphthalene-6-sulfonate is 0.1%~1.0%, the mass percentage of lubricant is 0.1%~0.55%, and the mass percentage of zwitterionic dispersant is 0.3%~1.3%. The pH value of the cerium oxide polishing slurry is 3.8~4.2. Using the cerium oxide polishing slurry provided in this application reduces the formation of Ce-Si-O that is difficult to clean during the polishing process and improves the cleaning yield and stability after polishing.

The invention relates to a waterproof anticorrosive paint and a preparation method thereof, and belongs to the technical field of paints.The paint comprises a component A and a component B, the component A comprises organic titanium-silicon-POSS (Polyhedral Oligomeric Silsesquioxane) hybrid resin, intercalation modified hydrotalcite-boron nitride composite barrier filler and the like; and the component B comprises a nitrogen-phosphorus modified amine composite curing agent, an interface metal anchoring accelerator and the like. The organic titanium-silicon-POSS hybrid resin is prepared by carrying out a reaction on tetraisopropyl titanate, 2, 3-dihydroxy naphthalene, methyltrimethoxysilane, KH-792 and octa-amino POSS (Polyhedral Oligomeric Silsesquioxane). The intercalation modified hydrotalcite-boron nitride composite barrier filler is prepared by stirring magnesium-aluminum hydrotalcite powder, phytic acid and KH-550 modified boron nitride nanosheets. The nitrogen-phosphorus modified amine composite curing agent is prepared from tris (2-aminoethyl) amine, hydroxymethyl phenyl phosphinic acid, p-toluenesulfonic acid and a T-31 epoxy resin curing agent. The interface metal anchoring accelerant is prepared from triethylamine, absolute ethyl alcohol and 2-aminoethyl phosphonic acid.

The invention discloses an AIE fluorescent sensor. The AIE fluorescent sensor is identified by a compound of a quinolinic acid derivative functionalized by a host molecule 2-hydroxy-1-naphthaldehyde and Eu < 3 + > in a DMF-H2O solution. The sensor shows yellow fluorescence in a solvent DMF-60% H2O, aqueous solutions of Fe < 3 + >, Cu < 2 + >, Sr < 2 + >, Al < 3 + >, Ag < + >, Ca < 2 + >, Hg < 2 + >, Fe < 2 + >, Co < 2 + >, Ni < 2 + >, Cd < 2 + >, Pb < 2 + >, Zn < 2 + >, Cr < 3 + >, Mg < 2 + > and Ba < 2 + > are respectively added into the solution, and only the addition of Cu < 2 + > can quench the fluorescence of the sensor. In addition, an aqueous solution of ATP, ADP, AMP, H2PO4 <->, HPO4 < 2-> and Cl <-> is added into the sensor containing the copper ions and the europium ions, and only the ATP is added, so that fluorescence of the sensor can be turned on. The recognition performance of Cu < 2 + > fluorescence quenching and ATP fluorescence opening can be used for circularly recognizing Cu < 2 + > and ATP for more than four times. Therefore, the AIE sensor can be used for fluorescent cycle recognition of copper ions and ATP (adenosine triphosphate). Meanwhile, the test paper prepared by the fluorescence sensor can also be used for detecting Cu < 2 + > and ATP. The fluorescence recognition performance has important application value in the field of ion and molecular recognition.

The invention discloses 1, 5-dihydroxy naphthalene as well as a preparation method and application thereof. Through bentonite nucleation induction, the efficiency is remarkably improved, the generation of byproducts is reduced, the purity of the obtained product can reach 99.6%, and the yield reaches 90%. The method effectively solves the problems of difficult nucleation, more side reaction products and the like in the traditional process. The method is mild in process condition, simple and convenient to operate, good in repeatability and suitable for industrial production, and has wide application prospects in the fields of dyes, medicines, high-performance materials and the like.

The invention discloses a fluorescent molecular probe for detecting SEI on the surface of an electrode in a lithium metal battery and a synthesis method and application of the fluorescent molecular probe, and relates to the technical field of lithium metal batteries, the fluorescent molecular probe is Li2HNA, and the chemical structural formula of the fluorescent molecular probe is shown in the specification. The synthesis method of the Li2HNA comprises the following steps: dissolving 3-hydroxy-2-naphthoic acid and LiOH in a mixed solution composed of deionized water and ethanol, carrying out a stirring reaction to obtain a precipitate, and washing and drying the precipitate to obtain the Li2HNA. By adopting the fluorescent molecular probe disclosed by the invention, the compactness of SEI in a lithium metal electrode in a large-size range can be qualitatively detected and the content of dead Li in the SEI in the lithium metal electrode can be quantitatively detected through fluorescence imaging and fluorescence titration technologies.

The invention belongs to the technical field of high polymer materials, and particularly relates to a flame-retardant polypropylene composite material as well as a preparation method and application thereof. The flame-retardant polypropylene composite material is prepared from the following raw materials: polypropylene and a flame retardant, the flame retardant is prepared from the following raw materials: 1, 2, 6-trihydroxy naphthalene, poulochic acid and coral coral bacterial acid. The polypropylene composite material has a two-dimensional lamellar continuous multi-benzene-ring structure, and can form a compact physical isolation layer in a polypropylene combustion process, so that oxygen and heat in a whole combustion system are isolated from combustibles, and the thermal decomposition and combustion rate of polypropylene is delayed. Meanwhile, a large number of carbonyl structures in the flame retardant can improve the crosslinking degree and the thermal stability of the flame retardant to a certain extent, the charring speed and the charring rate of the polypropylene material are indirectly improved, the flame spreading speed is delayed, and the polypropylene composite material has good flame retardance and is environmentally friendly.

The application discloses a trifluoromethyl benzyl ether substituted amino acid derivative, a preparation method and application thereof, and belongs to the technical field of organic compound synthesis and medicine. The synthesis method of the trifluoromethyl benzyl ether substituted amino acid derivative is obtained through two-step reaction, that is, first, a photo extension reaction is carried out between a benzyl alcohol compound and hydroxynaphthaldehyde (or hydroxybenzaldehyde), then a Schiff base is formed after an amino acid ester hydrochloride, and then the Schiff base is reduced by sodium cyanoborohydride, and then simple hydrolysis is carried out to obtain the trifluoromethyl benzyl ether substituted amino acid derivative. The preparation method has the characteristics of simple steps, mild reaction conditions and fast reaction, and meets the requirements of green chemistry. The compound prepared according to the method can selectively adjust S1P1 receptors without exciting S1P3 receptors, and is expected to be developed into a new preparation for treating idiopathic pulmonary fibrosis.

The application discloses a europium functionalized metal-organic framework double-emission fluorescent probe and a preparation method and application thereof, relates to the field of organic metal frameworks and fluorescent detection, and the preparation method comprises the following steps: mixing ZrCl4, pyromellitic acid, 6-hydroxy-2-naphthoic acid and water, adding acetic acid to obtain a mixture; the mixture is heated to reflux, centrifuged to obtain a residue, washed and dried to obtain UCHNA; the UCHNA is dispersed in an aqueous solution of Eu(NO3)3.6H2O, heated to react, the white precipitate is collected, washed and dried, and the Eu-MOF is obtained. 3+ The application has the beneficial effect that a luminescent ligand 6-hydroxy-2-naphthoic acid is used to modify a UiO-66 type MOF, and Eu 3+ -MOF is synthesized through post-modification and reasonable design, and the Eu-MOF can selectively and rapidly respond to crystal violet (CV) and quinine (QN) through different response modes, and has a low detection limit, which is superior to most reported sensors.

The invention relates to the technical field of fluorescent probes, in particular to a hydrogen sulfide fluorescent probe based on naphtha coumarin and preparation and application of the hydrogen sulfide fluorescent probe based on naphtha coumarin. The preparation method of the fluorescent probe comprises the following steps: (1) carrying out a reaction on 7-hydroxycoumarin and N-phenyl bis (trifluoromethanesulfonyl) imine to obtain 7-trifluoromethanesulfonyloxy coumarin, namely a compound 4, and (2) carrying out a reaction on the compound 4 and bis (pinacol) diborate to obtain 7-pinacol borate coumarin, namely a compound 3. (3) reacting the compound 3 with 6-bromo-2-naphthol to obtain 7-(6-hydroxynaphthalene-2-yl) coumarin, namely a compound 2, and (4) reacting the compound 2 with 2, 4-dinitrofluorobenzene to obtain the hydrogen sulfide fluorescent probe 7-(6-(2, 4-dinitrophenoxy) naphthalene-2-yl) coumarin based on naphtha coumarin, namely a compound 1. According to the application of the fluorescent probe, whether hydrogen sulfide exists or not is detected by utilizing the change of fluorescence intensity at 505 nm. The preparation and treatment process of the fluorescent probe is simple, and the fluorescent probe has the advantages of being good in selectivity, high in sensitivity, high in response speed and the like in a hydrogen sulfide and other interferent coexisting system.

The invention provides a negative photosensitive resin composition which can obtain a cured film with high visible light shielding property even if a colorant such as carbon black is reduced. The invention also provides a cured film and a resist film. A negative photosensitive resin composition containing the following components (A)-(C): (A) a novolac phenolic resin in which the molar ratio [(a1): (a2): (a3): (a4)] of a structural unit (a1) derived from cresol, a structural unit (a2) derived from dihydroxynaphthalene, a structural unit (a3) derived from benzaldehyde, and a structural unit (a4) derived from salicylaldehyde is 1: (0.25-4.0): (0.25-4.0): (0.25-4.0); (B) a photosensitizer; and (C) an organic solvent.

The invention belongs to the field of biological medicine, and particularly relates to a compound containing trifluoromethyl naphthyl urea and application of the compound in tumor resistance. The invention provides a novel compound 3, 3, 3-trifluoro-2-hydroxy-2-{4-[3-(naphthalene-2-yl) ureido] phenyl} ethyl propionate, and experiments prove that the novel compound 3, 3, 3-trifluoro-2-hydroxy-2-{4-[3-(naphthalene-2-yl) ureido] phenyl} ethyl propionate can be combined with GPR43 protein, is high in affinity and also has a remarkable anti-cancer effect.

The application discloses a fluorescent ion probe based on dihydroxynaphthalene, and preparation and application thereof in detection of monuron, wherein the fluorescent ion probe can realize rapid, sensitive and specific detection of monuron residues, the fluorescent ion probe is loaded on paper to develop fluorescent paper, the demand of a portable device is met, and a new method is provided for convenient detection of monuron in a complex matrix.

The invention relates to the technical field of high-performance polymer fiber manufacturing, in particular to a low-processing-viscosity liquid crystal polyarylester fiber and a preparation method thereof.The preparation method comprises the steps that S1, p-hydroxybenzoic acid and 2-hydroxy-6-naphthoic acid serve as monomers, and an acetylation reaction is conducted in the presence of an acetylation reagent and a catalyst; the preparation method comprises the following steps: firstly, preparing LCP resin, then carrying out melt polycondensation reaction, adding 6-acetoxy-2-naphthoic acid at the later stage of the melt polycondensation reaction, stirring and dispersing, discharging, cooling and granulating to obtain the LCP resin; and S2, carrying out melt spinning and heat treatment on the LCP resin to obtain the liquid crystal polyarylate fiber. According to the preparation method, the melt processing viscosity of the resin can be remarkably reduced, the production smoothness is improved, the heat treatment time is shortened, the production energy consumption is reduced, the high molecular weight potential of the resin in spinning processing is not influenced, and the liquid crystal polyarylate fiber is ensured to have very good strength performance.

The invention relates to the field of analysis and detection, in particular to a fluorescent probe as well as a preparation method and application thereof. The fluorescent probe provided by the invention is prepared by carrying out condensation reaction on barbituric acid and 2-hydroxy-1-naphthaldehyde in a polar solvent, a carbon-carbon double bond formed by condensation of barbituric acid and 2-hydroxy-1-naphthaldehyde is used as a key pi bridge in a molecule, and a chromophore with a strong intramolecular charge transfer effect is jointly constructed; the fluorescent dye shows cyan appearance and strong green fluorescence in an aqueous solution. After specific reaction with hypochlorite, a conjugated skeleton and an ICT process of the whole molecule are destroyed, so that the color of a solution is changed from cyan to colorless, fluorescence is remarkably quenched, and'off-on 'type detection is realized. The probe has the advantages of quick response, high sensitivity and good selectivity, can be applied to qualitative and quantitative detection of hypochlorite in environmental water quality and biological samples, and supports test paper portable detection.