79 results about "Naphthol AS" patented technology

The invention discloses a Cl-Bi carbon dioxide reduction electrocatalyst, a preparation method thereof and application of the Cl-Bi carbon dioxide reduction electrocatalyst in preparation of formic acid through catalytic reduction of carbon dioxide, and belongs to the technical field of electrocatalyst materials. The preparation method comprises the following steps: preparing a sodium chloride solution, adjusting the pH value with acid, adding Bi2O3, carrying out a stirring reaction, washing a reactant, and drying to obtain BiOCl; the preparation method comprises the following steps: dispersing BiOCl, carbon black and naphthol in ethanol, carrying out ultrasonic treatment to obtain ink, dripping the ink onto hydrophobic carbon paper, drying, and reducing under negative voltage to obtain the Cl-Bi carbon dioxide reduction electrocatalyst. The prepared Cl-Bi carbon dioxide reduction electrocatalyst is simple in preparation method, free of pollution, rich in raw material and low in price, and the Cl-Bi carbon dioxide reduction electrocatalyst has high formic acid production selectivity, high formic acid yield and excellent stability.

The invention relates to the technical field of residue soil baking-free brick building materials, and discloses a waste residue soil solidified baking-free blank brick which is prepared from the following components in parts by weight: 1500-1600 parts of waste residue soil, 20-30 parts of polypropylene fiber, 150-170 parts of a curing agent, 3-8 parts of a powder enhancer, 0.5-3 parts of a hyperbranched naphthalene water reducer and 180-190 parts of water. The preparation method of the hyperbranched naphthalene water reducer comprises the following steps: by taking naphthalene as a raw material, sulfonating with concentrated sulfuric acid, and carrying out condensation reaction with branched naphthol phosphate and formaldehyde, thereby obtaining the hyperbranched naphthalene water reducer. The waste residue soil solidified baking-free blank brick has excellent compressive strength, and can reach the performance standard of tailing bricks with the strength grade of MU15 in JC / T422-2007 Non-Sintered Rubbish Tailing Brick.

The invention discloses a novel photochromic dye and a preparation method thereof, and belongs to the technical field of fine chemical synthesis and optical functional materials. The invention prepares a novel photochromic dye by reacting a diaryl ketone with (propynyloxy) trimethylsilane to generate a hydroxyl-functionalized diaryl alkynol, and reacting the diaryl ketone with succinate and acetic anhydride to generate a naphthol derivative, and reacting the naphthol derivative with the above-mentioned hydroxyl-functionalized diaryl alkynol to generate a cyclic lactone-modified naphthopyran compound. The photochromic dye has a fast discoloration speed, can be used in the fields of color-changing lenses, textiles, anti-counterfeiting, coatings, etc., and the preparation process is simple and easy to operate.

The invention provides a liquid red direct dye and a preparation method thereof, and the method comprises the following steps: S1, dispersing 2-amino-5-naphthol-7-sulfonic acid and bis (trichloromethyl) carbonate in water, adjusting the pH value of a reaction system by using a first organic base, and reacting to obtain a scarlet acid aqueous solution; s2, dispersing a sulfo aromatic amine compound and nitrite in water, adjusting the pH value of a reaction system by using inorganic acid, reacting to obtain sulfo aromatic amine diazonium salt precipitate, and performing solid-liquid separation to obtain sulfo aromatic amine diazonium salt; and S3, adding the sulfonic aromatic amine diazonium salt in the step S2 into the scarlet acid aqueous solution in the step S1, adjusting the pH value of the reaction system by using second organic alkali, and reacting to obtain the liquid red direct dye. Through the preparation method, the red direct dye which can stably exist in a liquid form and is suitable for direct use can be obtained.

This resist underlayer film-forming composition contains a solvent and a resin (G) having a plurality of composite unit structures. The composite unit structures each have a unit structure (A) having an aromatic ring and a unit structure (B) having one or more carbon atoms. The resin (G) is obtained through a reaction for generating a covalent bond between a carbon atom constituting the aromatic ring in the unit structure (A) and a carbon atom in the unit structure (B). A first composite unit structure includes a unit structure (A-I) including a naphthol as the unit structure (A), and a second composite unit structure includes a unit structure (A-II) including a nitrogen atom as the unit structure (A).

The invention discloses a preparation method of hexa-naphthyloxy cyclotriphosphazene, which comprises the following steps: adding alkali metal hydroxide into a reaction solvent in which naphthol is dissolved, and reacting at 40-60 DEG C for 20-40 minutes to prevent oxygenolysis so as to prepare an alkali metal naphthol salt solution; the solution is stirred and dropwise added into a reaction solvent containing hexachlorocyclotriphosphazene, the ratio of hexachlorocyclotriphosphazene to the solvent is 1: 20-1: 30, the ratio of naphthol to hexachlorocyclotriphosphazene is larger than or equal to 6: 1, substitution is carried out step by step, after dropwise adding is completed, a reaction is carried out for 12-24 h at the temperature of 80-120 DEG C, and six chlorine atoms are completely substituted by naphthyloxy; filtering reaction liquid, and washing a filter cake with a solvent; and carrying out reduced pressure distillation on the filtrate to recover the solvent, washing the crude product with ethanol to remove an intermediate and an oligomer, washing with water to remove water-soluble impurities, filtering, and drying to finally obtain the high-purity hexa-naphthyloxy cyclotriphosphazene with the melting point of 169 DEG C. According to the method, the high-purity hexa-naphthyloxy cyclotriphosphazene crystal is ensured to be obtained by accurately controlling substitution reaction conditions and a multi-stage purification process.

The application discloses a preparation method of acid and alkali resistant toluidine red pigment, belongs to the technical field of pigment synthesis, and introduces di-primary amine on a modified toluidine red pigment, then reacts with a dicarboxylic compound, and finally is prepared through hydrolysis and self-assembly; the modified toluidine red pigment is prepared through the following steps that 3-amino-4-nitrobenzyl alcohol is diazotized and then coupled with 2-naphthol; the acid and alkali resistant toluidine red pigment prepared by the application not only has bright color and good hiding power, and also has high coloring strength, light resistance, water resistance, oil resistance and dispersibility, and simultaneously has strong acid and alkali resistance and environmental stability, and significantly improves the application performance of the pigment.

The application provides a preparation method of 3-aryl / alkyl-beta-naphthyl ether compounds, and the preparation method comprises the following steps: reacting trimethyl orthoformate with 1,3-diaromatic propyl ketone compounds or 1-aryl-3-alkyl ketone compounds to obtain 3-aryl-beta-naphthyl ether compounds or 3-alkyl-beta-naphthyl ether compounds. The reaction condition of the application is mild, trimethyl orthoformate is cheap and easy to obtain, can be used as a methylation reagent and a carbon source for extending a carbon chain at the same time, the range of reaction substrates is wide, and the functional group tolerance is good; the reaction is efficient, the selectivity is high, the post-treatment is simple, the operation is simple, and the application is suitable for large-scale industrial production; the complex substrate prepared in advance in the traditional reaction is avoided, the metal catalyst necessary for the traditional reaction is not needed, the binaftyl alcohol precursor compounds can be prepared with high chemical selectivity, and a more simple and efficient route is provided for the olefin hydroformylation / hydroformyl esterification reaction for synthesizing bidentate ligands.

The purpose of the present invention is to provide: a photochromic compound that has excellent temperature dependence, decoloration speed, and durability; a naphthol derivative that can be an intermediate of the photochromic compound; a naphthol derivative that can be an intermediate of the photochromic compound; a curable composition that contains the photochromic compound; an optical article; a lens; and eyeglasses. An embodiment of the present invention provides a photochromic compound having a skeleton represented by formula (1). In formula (1), M is C, Si, or Ge. R1 is a group represented by formula (2). R2 is an alkyl group that may contain a halogen atom in a substituent, or a group represented by formula (2).

The utility model provides an azoic coupling component AS production filtering device, which belongs to the technical field of azoic coupling component AS production devices and comprises a treatment box, a liquid inlet is fixedly mounted at the top of the treatment box, a flushing pipe is arranged in the liquid inlet, and a plurality of nozzles are fixedly mounted at the bottom of the flushing pipe. Through the arrangement of the filtering assembly, the fixing frame is mounted in the mounting groove through the fastening bolts, the bottom plate is placed in the treatment box, and the bottom plate is fixed through the mounting frame, so that an azoic coupling component solution can be filtered, and a worker can conveniently maintain and replace a filter screen; a first motor drives a screw rod to rotate, a sliding block moves along the screw rod and a sliding rod, a scraping plate removes filter residues on a filter screen, a second motor drives a rotating rod and a driving wheel to rotate, a synchronous belt drives a driven wheel and a first connecting rod to rotate, the treatment box is turned over, and the treatment box is convenient to clean.

The invention relates to optically active diphenol with both central chirality and axial chirality as well as a synthesis method and application of the optically active diphenol. The structural formula of the optically active diphenol is as follows: # imgabs0 #, wherein Ar1 is an aryl compound or a heteroaryl compound with different substituent groups, Ar3 is an aryl compound with different substituent groups, Ar2 is an aryl compound or a heteroaryl compound with different substituent groups, and Ar4 is halogen or hydrogen. The invention focuses on an enantioselective synthesis method for constructing a diphenol compound NAPOLs with rigid conformation. The synthesis method comprises the following steps: catalyzing 1-aryl ethynyl-2-naphthol and a derivative thereof and 8-aryl hydroxymethyl-2-naphthol and a derivative thereof through chiral phosphoric acid to synthesize an optically active NAPOLs diphenol ligand with axial chirality and central chirality. The compound has the characteristics of central chirality and axial chirality, and is expected to provide a new idea for the field of asymmetric synthesis.

The invention discloses an electrochemical sensor for monitoring the glucose content of fish in real time and application of the electrochemical sensor, and belongs to the field of electrochemistry. The sensor comprises a three-electrode system consisting of a working electrode, a reference electrode and a counter electrode, the working electrode takes a platinum-iridium alloy wire as a substrate, the surface of the working electrode is coated with a composite membrane consisting of a carbon nanotube and naphthol, and glucose oxidase is fixed on the composite membrane through physical adsorption and chemical crosslinking. The glucose detection sensitivity of the sensor is higher than 0.215 nA / mmol.L <-1 >, the response speed is high, the stability is good, the anti-interference capability is high, and the sensor has very high correlation with the detection result of a glucometer. According to the invention, real-time in-vivo monitoring of the fish glucose content is realized, and powerful technical support is provided for green and sustainable development of aquaculture.

The purpose of the present invention is to provide: a photochromic compound having an excellent color fading rate and excellent durability; a naphthol derivative that can become an intermediate for the photochromic compound; and a curable composition, an optical article, a lens and eyeglasses each containing the photochromic compound. According to embodiments, a photochromic compound having a backbone represented by formula (1) is provided. In formula (1), M represents C, Si or Ge; R1 represents a haloalkyl group having 1 to 20 carbon atoms inclusive; R2 represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms inclusive or a substituted or unsubstituted haloalkyl group having 1 to 20 carbon atoms inclusive.

The invention discloses a method for producing hydrogen peroxide by two-electron electrocatalytic water oxidation of calcium carbonate-based natural substances, which comprises the following steps: (1) preparation of an anode material: loading the calcium carbonate-based natural substances such as egg shell powder, calcite powder, clam shell powder, coral powder and the like on a substrate through a naphthol binder to serve as the anode material; and (2) carrying out a reaction for synthesizing hydrogen peroxide by electro-catalysis water oxidation: constructing an electro-catalysis environment and electrochemical double cells, separating a cathode and an anode by a nafion membrane only allowing protons to pass through, taking a graphite sheet as the cathode, and taking a mixed solution of potassium carbonate and potassium bicarbonate as an electrolyte. And carrying out electro-catalysis water oxidation reaction to obtain a high-concentration hydrogen peroxide solution. The method simultaneously meets the requirements of resource utilization of the calcium carbonate waste and production of high-concentration hydrogen peroxide, and has the advantages of environmental friendliness and certain economic value.

This invention discloses a composition for removing camphor ball odor from clothing, its preparation method, and its application method. The composition comprises the following components in parts by weight: 4-15 parts polyol, 2-8 parts fatty alcohol polyoxyethylene ether sulfate, 3-9 parts fatty acid, and 0.5-2 parts sodium hydroxide or potassium hydroxide. This invention utilizes the products of the reaction between polyol, fatty alcohol polyoxyethylene ether sulfate, fatty acid, and alkali metal hydroxide to increase the solubility of dichlorobenzene, which then reacts with naphthol in camphor balls, thereby removing dichlorobenzene and naphthol from clothing due to the camphor ball odor. The composition for removing camphor ball odor from clothing of different materials can effectively remove camphor ball odor from clothing, and the removal method is simple.

Provided is a synthetic intermediate having a core skeleton structure of formula (I) for preparing a photochromic indole naphthopyran compound: wherein m is 0 to 4, n is 0 to 4, R 1 and R 2 R is independently hydroxy, cyano, (meth)acrylate, amino, halide, substituted or unsubstituted alkyl, borate, boric acid, polyether, polyester, polycarbonate, polyurethane, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted alkylthio, substituted or unsubstituted arylthio, ketone, aldehyde, ester, carboxylic acid, carboxylate, amide, carbonate, carbamate, urea, siloxane, alkoxysilane, or polysiloxane; 3 is substituted or unsubstituted 2-pyridyl or substituted or unsubstituted 2-quinolyl; and R 4 is hydrogen, substituted or unsubstituted alkyl, alkoxymethyl, substituted or unsubstituted silyl, or acyl. Also provided is a method for producing an indole naphthol compound, the method comprising cyclizing a phenylnaphthol compound of formula (I) in the presence of a catalyst.

The method comprises the following steps: purifying an anhydrous sodium sulfite product from crude sodium sulfite and wastewater thereof, evaporating the sodium sulfite wastewater until the wastewater is nearly saturated, re-dissolving the crude sodium sulfite until the concentration is nearly saturated, preserving heat, filtering to remove sodium naphthol organic matters with low solubility, and cooling filtrate with water to separate out sodium sulfite heptahydrate crystals. Performing alkali washing on the sodium sulfite heptahydrate crystal to enable sodium naphthol adsorbed on the surface of the sodium sulfite heptahydrate crystal to be dissolved into alkali washing liquid to obtain pure decolored sodium sulfite heptahydrate crystal, and drying and decoloring the sodium sulfite heptahydrate crystal to obtain high-purity anhydrous sodium sulfite; the alkali washing liquid is returned to the naphthol SO2 absorption acidification process for mechanical application, and sodium naphthol is recovered; the distilled condensate water is used as process water for naphthol production; according to the method, the characteristic that sodium sulfite is subjected to water-cooling salt separation to generate sodium sulfite heptahydrate when the concentration of sodium sulfite is nearly saturated is utilized, the process route for purifying the anhydrous sodium sulfite product is simple and feasible, secondary pollution and emission of three wastes are avoided, and the method belongs to a clean production process with comprehensive utilization of resources and environmental friendliness.

The invention discloses a naphthol glycoside compound separated from cortex juglandis mandshuricae as well as a preparation method and application of the naphthol glycoside compound. The preparation method of the naphthol glycoside compound comprises the following main preparation steps: by taking cortex juglandis mandshuricae as a raw material, carrying out reflux extraction with 60% ethanol, extracting with solvents with different polarities, separating an n-butyl alcohol layer, purifying and enriching by adopting macroporous resin, and purifying by combining reversed-phase column chromatography separation with HPLC (High Performance Liquid Chromatography) chromatography, thereby obtaining the naphthol glycoside compound. The purity and the yield of the obtained compound are relatively high. An in-vitro antifungal activity experiment shows that the naphthol glycoside compound prepared by the invention has remarkable inhibitory activity on pathogenic fungi, is a high-quality antifungal active substance from a natural product, and has an application prospect of being developed into an antifungal drug.

The application provides a flexible wearable sensor and a preparation method and a quercetin determination method, relates to the field of quercetin detection, and comprises the following steps: performing laser etching on a to-be-processed mold according to a preset pattern to form a to-be-covered mold; covering the to-be-covered mold with polydimethylsiloxane, performing curing treatment on the to-be-covered mold, obtaining a cured mold, stripping the polydimethylsiloxane film of the cured mold, obtaining a to-be-packaged electrode, coating polydimethylsiloxane to the fourth protruding part; coating silver paste to the third protruding part, heating until curing, and obtaining a cured electrode; immersing the cured electrode into a tetrachloroauric acid solution, depositing gold nanoparticles on the surface of the cured electrode, dropping a mixed solution of black phosphorus solution and naphthol on the first protruding part, and obtaining a flexible wearable sensor after drying. The application has high detection result accuracy and low test cost, and provides accurate judgment basis for the normal growth and development of plants.

This invention discloses an age-resistant photochromic dye and its preparation method, belonging to the fields of fine chemical synthesis and optical functional materials technology. In this invention, naphthalene ketone is reacted with succinate and acetic anhydride to generate a hyperconjugated naphthol derivative. The naphthol derivative then reacts with the aforementioned hydroxyl-functionalized diarylkynyl alcohol to generate a hyperconjugated naphthopyran compound. This synthetic process is easy to operate. Furthermore, the obtained hyperconjugated naphthopyran compound exhibits a rapid fading rate and good age resistance, making it suitable for applications in photochromic lenses, textiles, anti-counterfeiting, coatings, and other fields.

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 discloses a water-resistant room-temperature phosphorescent material with long service life and high quantum yield and application thereof, and the material is obtained by doping a binaphthol-containing functionalized phosphor monomer into a polymer matrix polyvinyl alcohol and then carrying out iodine dyeing-stretching-crosslinking (ISB). Through the heavy atom effect of iodine, the crossing of phosphorescence systems is enhanced, and the molecular structure rigidity is enhanced through boric acid crosslinking, so that long-life room-temperature phosphorescence emission from nothing to existence and from weak to strong is realized; the phosphorescence lifetime is increased by 28.4 times, and the phosphorescence quantum yield is increased by 24.1 times. The preparation method is simple to operate and low in production cost, has good universality, provides a new strategy for designing a long-life room-temperature phosphorescent material, and has good application prospects in the fields of antibiosis, water resistance, multicolor display, information encryption and the like.

The present invention discloses a method and system for detecting the colorimetric properties of naphthol AS-PH based on image recognition, which relates to the field of image recognition technology. The method comprises placing a naphthol AS-PH test paper to be tested on a standard whiteboard, collecting an RGB image of the naphthol AS-PH test paper by a camera; performing grayscale correction on the RGB image to obtain a corrected RGB corrected image; extracting an effective detection area of the naphthol AS-PH test paper from the RGB corrected image, and eliminating edge noise of the effective detection area by a double Gaussian blur algorithm; dividing the effective detection area into a plurality of equal-area sub-areas, calculating the RGB mean of each sub-area, and selecting a central sub-area with the most stable RGB mean as a target detection area; and obtaining a concentration value of the naphthol AS-PH to be tested based on the RGB value of the target detection area and a pre-established naphthol AS-PH concentration-RGB mapping model. The present invention effectively overcomes the problems of image noise, color instability, and measurement error existing in traditional detection methods.

The invention discloses a metal organic framework composite material with circular polarization room temperature phosphorescence characteristic and a preparation method thereof, the composite material is formed by assembling a metal organic framework material and a chiral molecule through a coordinate bond, the metal organic framework material is ZIF-8, and the chiral molecule is 1, 1 '-bi-2-naphthol. Comprising the following steps: mixing a metal salt, an organic ligand and axial chiral molecules at normal temperature, then carrying out ball milling, washing, centrifuging and drying to obtain the metal organic framework composite material with the circularly polarized room-temperature phosphorescence characteristic. The S-type metal organic framework composite material and the R-type metal organic framework composite material both present yellow phosphorescence emission under excitation, the service life of the S-type chiral composite material is 392.2 ms, and the service life of the R-type chiral composite material is 395.2 ms. The composite material shows excellent circular polarization room temperature phosphorescence performance, and the maximum luminescence asymmetry factor glum is 1.2 * 10 <-3 >. The preparation method is mild in reaction condition, rapid in reaction, high in yield, free of a large amount of organic solvent, simple in reaction process, simple in required equipment and suitable for batch production. The composite material prepared by the invention has good application prospects in the aspects of information security, commodity labels, anti-counterfeiting and the like.

The invention relates to the technical field of pesticide detection, in particular to an organic photoelectrochemical transistor for detecting organic pesticide and a preparation method and application of the organic photoelectrochemical transistor. The preparation method comprises the following steps: dissolving thioacetamide in a bimetallic salt precursor solution, and carrying out a hydrothermal reaction to obtain an indium-based bimetallic sulfide heterojunction CdS / CdIn2S4; dispersing a naphthol solution and the indium-based bimetallic sulfide heterojunction CdS / CdIn2S4 in deionized water to obtain a turbid liquid, coating the surface of ITO conductive glass with the turbid liquid, and drying to obtain a grating electrode CdS / CdIn2S4-ITO; a chitosan solution is dispensed on the surface of the grating electrode CdS / CdIn2S4-ITO, and after drying, a grating electrode CS / CdS / CdIn2S4-ITO is obtained; a glutaraldehyde solution is dispensed on the surface of the grating electrode CS / CdS / CdIn2S4-ITO, and the grating electrode CS / GA / CdS / CdIn2S4-ITO is obtained after the grating electrode CS / CdS / CdIn2S4-ITO is dried; and dispensing a diazinon aptamer solution on the surface of the grating electrode CS / GA / CdS / CdIn2S4-ITO, and incubating at room temperature to obtain the electrode sensor Apt / CS / GA / CdS / CdIn2S4-ITO. The OPECT has the characteristics of high sensitivity, easiness in integration, portability, low cost and miniaturization.

The application relates to an indium-doped copper oxide electrode for electrocatalytic reduction of CO2 and a preparation method thereof, and belongs to the technical field of electrocatalytic reduction. Copper chloride and indium nitrate are used as raw materials, sodium hydroxide is used as a precipitant, a precursor is obtained through co-precipitation, the precursor is decomposed through heating, centrifugal washing and vacuum drying, and an indium-doped copper oxide catalyst is obtained, ink is prepared by mixing water, ethanol and a naphthol solution, the ink is uniformly coated on carbon paper and dried to obtain the indium-doped copper oxide electrode. The prepared indium-doped copper oxide electrode has high catalytic activity and good stability, indium atoms are doped in the copper oxide crystal lattice, the kinetics of the catalyst is improved, the desorption of carbon monoxide from the surface is accelerated, the doping of indium can improve the stability of the catalyst and inhibit the generation of hydrogen, a competitive product. The operation process is simple, raw materials are easy to obtain, no pollution is caused, no expensive equipment is needed, and the application has a wide application prospect.

The present invention provides a toner for developing electrostatic latent images and a method for manufacturing the toner for developing electrostatic latent images. The toner contains a binder resin which contains an amorphous polyester resin A, and a colorant. The amorphous polyester resin A is a polycondensate of an alcohol component, a carboxylic acid component, and polyethylene terephthalate. The colorant contains a naphthol AS-based pigment. The manufacturing method includes a step for melt-kneading at least the binder resin and the colorant, and a step for pulverizing a kneaded substance resulting from the previous step. The toner for developing electrostatic latent images according to the present invention is suitable for developing latent images and the like formed in electrophotography, electrostatic recording, electrostatic printing, or the like.

Photochromic polyamide materials, their precursors, preparation methods, photoinitiators, and applications are disclosed. The precursors for photochromic materials are described, which are used to prepare photochromic polyamide materials. This process involves mixing the precursor with multifunctional hydrocarbon groups or their derivatives to obtain the photochromic material. Specific functional hydrocarbon groups can be selected for mixing to enhance the performance of the photochromic material. By introducing photochromic units into the polyamide structure, the material can quickly respond to ultraviolet light and return to a colorless state, maintaining excellent photochromic effects. Simultaneously, the polyamide matrix significantly enhances the material's mechanical strength, wear resistance, and environmental adaptability, giving it long-term stable color-changing properties. This makes it suitable for various fields such as smart coatings and optical devices. This solution addresses the technical problems of existing naphthol-pyran-based photochromic materials in terms of photoresponse, mechanical properties, and chemical stability.

The invention belongs to the technical field of organic chemistry, and particularly relates to a synthesis method of a chiral sulfonyl substituted vinyl naphthalene axial chiral compound. The method comprises the following steps: in a solvent, under a mild condition, generating a sulfinic acid anion intermediate from a cyclopropanol compound and a sulfur dioxide solid substitute in situ, and then carrying out asymmetric nucleophilic attack on a 1-alkynyl-2-naphthol compound activated by a chiral small organic molecule catalyst, so as to obtain the 1-alkynyl-2-naphthol compound. The chiral sulfonyl substituted vinyl naphthalene axial chiral compound is obtained. The synthesis method has the advantages that the conditions are mild, the method is simple and efficient, the application range of substrates is wide, the high-enantioselectivity sulfonyl substituted vinyl naphthalene axial chiral compound is obtained, the types of sulfonylation reactions are enriched to a certain extent, and the method has good application value.

The invention relates to the technical field of new energy materials, in particular to a preparation method, a product and application of a composite photo-anode. The preparation method of the composite photo-anode comprises the following steps: uniformly mixing a mixed solution A of a zinc source and a molybdenum source with a solution B of 2-methylimidazole, and standing to prepare Mo-ZIF-8; dissolving Mo-ZIF-8 in a solvent 2, uniformly mixing, adding the naphthol film solution, uniformly mixing, and loading the Mo-ZIF-8 in the obtained Mo-ZIF-8 mixed solution on the surface of the BiVO4 film to obtain a Mo-ZIF-8 / BiVO4 photo-anode; a thioacetamide solution is added to the surface of the Mo-ZIF-8 / BiVO4 photo-anode for a heating reaction, and the composite photo-anode is obtained. According to the invention, on the premise of not consuming electric energy, solar-driven photoelectrochemical desalination and COD (Chemical Oxygen Demand) degradation are carried out. The salt removal rate of the composite photo-anode and the degradation rate of organic matter COD are high.