528results about "Imino compound preparation" patented technology

The invention discloses application of a metal ion doped graphene oxide film in catalytic synthesis of Schiff base. The metal ion doped graphene oxide film comprises a graphene oxide film and metal ions loaded on the surface and between layers of the graphene oxide film. Metal ions in the metal ion-doped graphene oxide film induce reactant molecule orientation through a cation-pi effect, and a confinement channel formed between the metal ions and GO is combined, so that a front line molecular orbit of a reactant for catalytic synthesis of the Schiff base is better matched, the molecular freedom degree is reduced, and the Schiff base catalytic synthesis efficiency is improved. And the molecules are subjected to bond breaking and bond forming reactions in a specific orientation. Molecules are orderly arranged among layers and flow to pass through a two-dimensional nano confinement channel provided by the graphene oxide nanosheets among the film layers, so that the reaction activation energy is reduced, and efficient catalytic synthesis of various Schiff bases is realized at room temperature. Meanwhile, by regulating and controlling the chemical microstructure of the membrane material, the catalytic reaction efficiency and the reaction selectivity can be effectively improved.

The invention provides a novel method for synthesizing a fluoroalkyl substituted 4, 4 '-diaminodiphenylmethane compound, which comprises the following steps: under the action of a catalyst, reacting an amine compound with a fluorine-containing aldehyde compound in an organic solvent, and after the reaction is finished, carrying out post-treatment to obtain the fluoroalkyl substituted 4, 4'-diaminodiphenylmethane compound. The method has the advantages of mild reaction conditions, simple operation, high reaction efficiency, cheap and easily available raw materials, good atom economy, no generation of wastes, and large-scale application prospects. In addition, the fluoroalcohol solvent is recycled through simple distillation operation, the cost of a large amount of solvent is effectively saved, the process safety is improved, and efficient and green industrial production is facilitated.

The invention provides a ligand compound and a preparation method thereof, a complex and a preparation method and application thereof, and belongs to the technical field of polyolefin, the ligand compound has a structure as shown in formula (I) or formula (II): # imgabs 0 # formula (I) and # imgabs 1 # formula (II); b1, b2, b3, R1 and R2 are respectively and independently selected from any one of hydrogen, substituted or unsubstituted alkyl with 1 to 5 carbon atoms, alkenyl with 2 to 6 carbon atoms, alkynyl with 2 to 6 carbon atoms, alkoxy with 1 to 5 carbon atoms, aryl with 6 to 30 carbon atoms and fused ring aryl with 10 to 50 carbon atoms; r1 and R2 are connected to form a ring or are not connected to form a ring; b1, b2, b3, b4 and b5 are respectively and independently selected from any one of hydrogen, substituted or unsubstituted C1-C5 alkyl, C2-C6 alkenyl, C2-C6 alkynyl and C1-C5 alkoxy; c1, c2 and c3 are respectively and independently selected from any one of hydrogen, substituted or unsubstituted alkyl with 1 to 5 carbon atoms, alkenyl with 2 to 6 carbon atoms, alkynyl with 2 to 6 carbon atoms, alkoxy with 1 to 5 carbon atoms and phenoxy; r1, R2, R3 and R4 are respectively and independently selected from any one of hydrogen, substituted or unsubstituted C1-C5 alkyl, C3-C10 cycloalkyl and substituted phenyl.

The invention provides a preparation method of a chain extender containing an imine bond and application of the chain extender in thermosetting polyurethane, and the preparation method comprises the following steps: under anhydrous and anaerobic conditions, mixing a reagent A and a reagent B, adding a solvent, reacting at 25-40 DEG C for 4-6 hours, cooling to room temperature, and carrying out rotary evaporation to remove the solvent to obtain the chain extender, wherein the reagent A is a derivative of benzene, one substituent group is an aldehyde group, at least one of the other five substituent groups is a hydroxyl group or an aldehyde group, and the reagent B is an organic compound containing both amido and hydroxyl group or an organic compound containing both amido and hydroxyl group. When the chain extender is used for preparing thermosetting polyurethane, imine bonds and carbamate bonds can be introduced into one monomer at the same time, so that the thermosetting polyurethane can maintain original excellent mechanical properties, solvent resistance and thermal stability, and also has self-healing and recyclable capabilities; the compatibility is good, and the performance and the application range of the thermosetting polyurethane are widened.

The invention discloses an anthraquinone-based MOF photocatalytic material as well as a preparation method and application thereof. The anthraquinone-based MOF photocatalytic material is prepared by carrying out solvothermal reaction on a ligand DPAq and a nickel source in a mixed solvent, wherein the ligand DPAq is 2, 6-bis (pyrazol-4-yl)-9, 10 anthraquinone, and the mixed solvent is a composition of N, N-dimethylformamide and water. The anthraquinone-based MOF photocatalytic material shows an appropriate band gap and good ROS generation efficiency and shows excellent catalytic activity and selectivity when applied to benzylamine coupling reaction, the reaction selectivity reaches 100%, the product yield can reach 97%, and the catalytic reaction efficiency is high; the product can be recycled, and the yield of the product can still reach 92% after the product is recycled for 5 times.

The invention relates to the technical field of medical chemistry, in particular to a bridge oxygen site regulatively modified rhodamine anti-cancer fluorescent compound as well as a preparation method and application thereof. The invention develops the rhodamine anti-cancer fluorescent compound of which the meso site is functionalized by tetraarylethene and the bridge oxygen site can be regulated and modified, the fluorescent compound has adjustable red light-near infrared fluorescence emission and excellent fluorescence quantum yield, and the quantum yield can be as high as 99%; the fluorescent compound specifically targets mitochondria, and mainly inhibits growth of tumor cells by inducing para-apoptosis; under irradiation of 655 nm near-infrared laser, ferroptosis is further triggered, efficient treatment of tumor cells is achieved through chemical-photodynamic synergistic effect, and a new treatment thought is provided for overcoming tumor drug resistance.

The invention discloses a clay stabilizer for a high-temperature environment and a preparation method of the clay stabilizer, and belongs to the technical field of oil field oil extraction auxiliaries. The preparation method comprises the following steps: mixing and stirring quaternary ammonium salt modified silicon dioxide and modified acrylamide according to a mass part ratio of 1: (5-6) to obtain the clay stabilizer. The clay stabilizer is obtained by mixing quaternary ammonium salt modified silicon dioxide and modified acrylamide, so that not only is the anti-swelling performance improved, but also the scouring resistance is improved.

The invention discloses an ether chain modified rhodamine fluorescent dye, an ether chain modified rhodamine fluorescent dye probe and a preparation method and application thereof, through modification of an ether chain, the water solubility of the rhodamine dye is improved, the aggregation quenching effect is reduced, meanwhile, the intramolecular torsional charge transfer (TICT) is reduced through the electron withdrawing effect of oxygen atoms, and the fluorescence sensitivity is improved. Finally, the quantum yield of the rhodamine dye is greatly improved. The quantum yield of ether chain modified oxygen rhodamine water is increased from 0.31 to 0.70, and the quantum yield of silicon-based rhodamine water is increased from 0.19 to 0.41. The rhodamine dye disclosed by the invention has the characteristics of high brightness, easiness in functional derivation and the like, and has application prospects in the fields of fluorescent probes, fluorescent labels, super-resolution fluorescence imaging and the like.

The invention relates to a reaction type closed diamine chain extender, dual-curing photosensitive resin, a 3D printed part and a preparation method, the reaction type closed diamine chain extender is obtained through reaction of a diamine chain extender and a functional monomer, the functional monomer at least comprises a functional group A, a functional group B and a functional group C, the functional group A is an aldehyde group or a ketone group and is used for reacting with an amino group in the diamine chain extender; and a functional group B containing a photocurable unsaturated bond. The reactive closed diamine chain extender provided by the invention participates in a photocuring process, so that the strength of a material in a photocuring stage is improved, the product yield in a printing process is ensured, no by-product is generated during subsequent heat treatment, and the mechanical property of a final finished product is not influenced. The dual-curing photosensitive resin can be stably stored for a long time, the mechanical property of the material can be remarkably improved through the photocuring-heat treatment synergistic effect, and the dual-curing photosensitive resin can be used for photocuring 3D printing technologies such as sinking type SLA and pull-up type DLP and LCD at the same time.

The invention relates to the technical field of corrosion inhibitors, and discloses a high-temperature acidizing corrosion inhibitor for an oil field and a preparation method and application thereof.The high-temperature acidizing corrosion inhibitor is prepared from (S)-1-amino-3-chloro-2-propanol hydrochloride, aldehyde compounds such as terephthalaldehyde, succinic anhydride, quinoline and the like through Schiff base, anhydride esterification and quaternization reaction, and the high-temperature acidizing corrosion inhibitor for the oil field is prepared. The novel high-temperature acidizing corrosion inhibitor for the oil field is prepared. The corrosion inhibitor provided by the invention contains a plurality of betaine groups, and can form strong interaction such as coordination and complexation on the steel sheet, so that the corrosion inhibitor can be well attached to the surface of the steel sheet to form a layer of stable organic micromolecule hydrophobic membrane, the contact between corrosion inhibition media such as hydrochloric acid and the surface of the steel sheet is inhibited, and an excellent corrosion inhibition effect is achieved. And the corrosion inhibitor contains a plurality of benzene rings, biphenyl, quinoline and other structures, has good thermal stability, and has good practical application in the aspects of corrosion prevention and corrosion inhibition of oilfield exploitation, oil pipes of high-temperature wells and other equipment.

The invention discloses a method for degrading, recycling and reapplying anhydride cured epoxy resin, and relates to the field of epoxy resin and degradation and regeneration thereof. The invention provides a method for catalyzing degradation of anhydride cured epoxy resin, the method can realize rapid and efficient degradation of epoxy resin under mild conditions, and the generated degradation product contains active groups and can be further recycled. The invention further provides a regeneration method of the anhydride cured epoxy resin, the regenerated anhydride cured epoxy resin is good in mechanical property after being degraded, the comprehensive performance of the anhydride cured epoxy resin is slightly different from that of non-degraded anhydride cured epoxy resin, and the recycling value of the anhydride cured epoxy resin is high.

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing a triarylmethane molecular skeleton from aromatic aldehyde and hydrazine hydrochloride substances. According to the method for synthesizing the triarylmethane molecular skeleton by using the aromatic aldehyde and the hydrazine hydrochloride substance, the aromatic aldehyde and the hydrazine hydrochloride substance are used as reactants, Friedel-Crafts reaction is firstly performed in a first solvent, then the first solvent is steamed out, zinc powder and a second solvent are added, then a reduction reaction is performed, and separation and purification are performed to obtain the triarylmethane molecular skeleton. The hydrazine hydrochloride substance is used for replacing aniline to react with aromatic aldehyde, the triarylmethane molecular skeleton is synthesized through a one-pot method, the reaction condition is mild, Lewis acid does not need to be used, the product is easy to separate, and the yield is high.

The invention provides a preparation method and application of a donor-receptor type two-dimensional imino CTF photocatalyst, and belongs to the technical field of photocatalyst preparation.The preparation method of the CTF photocatalyst comprises the following steps that 2, 4, 6-tris (4-aminophenyl)-1, 3, 5-triazine, terephthalaldehyde and 2, 4, 6-tris (4-aminophenyl)-1, 3, 5-triazine are mixed according to a certain proportion, and the donor-receptor type two-dimensional imino CTF photocatalyst is obtained. The preparation method comprises the following steps: by taking 2, 5-dimethoxy terephthalaldehyde or 2, 5-dihydroxy terephthalaldehyde as a raw material, reacting in a mixed solution of mesitylene / dioxane / acetic acid in a certain proportion for 3 days by adopting an inert gas sealing-solvothermal method, centrifuging the obtained product, sequentially washing with tetrahydrofuran and acetone for multiple times, and carrying out vacuum drying, thereby obtaining the 2, 5-dimethoxy terephthalaldehyde / 2, 5-dihydroxy terephthalaldehyde. The two-dimensional triazine CTF photocatalysts with different donor-receptor types are obtained. The preparation method comprises the following steps: by taking acetonitrile as a solvent, dispersing a photocatalyst into an arylamine solution with a certain concentration, stirring for 0.5 hour in a dark place, and carrying out catalytic reaction under visible light (lambda is greater than or equal to 420 nm), so that the preparation of the high-efficiency catalytic arylamine oxidative coupling reaction under the visible light is realized.

The invention belongs to the technical field of epoxy resin, and discloses an epoxy curing agent containing double dynamic bonds, a preparation method of the epoxy curing agent, a degradable and reconfigurable epoxy resin material and a preparation method of the degradable and reconfigurable epoxy resin material. Mixing and reacting with a solution containing organic acid and an M2 compound solution containing carbonyl, ether bonds or aldehyde groups to obtain a uniform solution; and adding an alkali solution into the solution, extracting, desolventizing and deprotecting the solution, adding a dialdehyde M3 compound solution, reacting, and drying to obtain the epoxy curing agent containing the double dynamic bonds. The degradable and reconfigurable epoxy resin material is prepared by compounding the modified epoxy resin with epoxy resin and carrying out a thermocuring process, the material can be quickly degraded in weak acid at a lower temperature, the material can be reconfigured at a certain temperature, the preparation process is simple, the required raw materials are wide in source and low in price, and the method is suitable for industrial production. The method has good economical efficiency and application value.

The present disclosure relates to the fields of chemistry and medicine, more particularly to processes for making 4-(2-chloro-4-methoxy-5-methylphenyl)-N-[(1S)-2-cyclopropyl-1-(3-fluoro-4-methylphenyl)ethyl]-5-methyl-N-prop-2-ynyl-1,3-thiazol-2-amine (Compound 1), pharmaceutically acceptable salts, and crystalline forms thereof, for the treatment of congenital adrenal hyperplasia (CAH).

The invention provides a low-dielectric chip mounting adhesive film composition and an adhesive film, the low-dielectric chip mounting adhesive film composition is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 10-30 parts of a toughening agent, 40-50 parts of a curing agent, 0.5-2 parts of an accelerant and 100-250 parts of inorganic filler, and the curing agent is prepared by compounding an aryl bifunctional primary amine curing agent and a trifunctional phenol curing agent according to the mass ratio of 3: (10-12). The three-functionality phenol curing agent is synthesized by taking a benzenetricarboxaldehyde derivative and an aminophenol derivative as raw materials through a Schiff base reaction, a branched chain of the three-functionality phenol curing agent contains an aromatic ring structure and a C = N bond, the three-functionality phenol curing agent is a star-shaped three-arm compound, namely, the three-functionality phenol curing agent, and due to the fact that the aromatic ring structure is large in size, the C = N bond is high in rigidity, and the curing agent is small in displacement space, the curing agent is not prone to falling off. The adhesive film composition has high resistance to polar groups in molecules and can better hinder polarization orientation, so that the molecular polarity of the cured adhesive film composition is reduced, and the dielectric constant and the dielectric loss are reduced.

The invention discloses a phenothiazinyl two-dimensional covalent organic framework material as well as a preparation method and application thereof. The two-dimensional covalent organic framework material has a structure as shown in a formula (I) or a formula (II): # imgabs0 #. The two-dimensional covalent organic framework material has high crystallinity and specific surface area, uniform pore size distribution and good thermal stability, also has good photosensitive groups and a suitable optical band gap, and can be used for preparing a light-sensitive material. The method has good application in the photocatalytic oxidation coupling direction.

The invention belongs to the technical field of analysis and detection of liquid nutritional agents, and provides a coniferous and cypress hydroformylation salicyl ester molecular device and a preparation method and application thereof. The method comprises the following steps: mixing a coniferyl aldehyde solution, a dehydrating agent dispersion liquid and a salicyl ester derivative solution, and carrying out a dehydration condensation reaction on the mixed solution to obtain the coniferyl hydroformylated salicyl ester molecular device. The coniferous hydroformylated salicylate molecular device has the advantages of high viscosity sensitivity coefficient, stable chemical structure, strong visualization effect, release of stable optical signals in a wide pH range, insensitivity to the polarity of the solvent, and good solvent tolerance; the device can be used as a molecular tool for in-situ measurement of viscosity in a nutritional agent microenvironment, detection can be realized without depending on shearing and relative movement in the measurement process, consumption of a large amount of samples can be avoided, the whole process is rapid, efficient and convenient, and viscosity change of a liquid nutritional agent containing a large amount of pseudoplastic fluid can be effectively measured.

The invention relates to the field of viscosity detection, and provides a fluorescent probe for detecting the viscosity of mask essence as well as a preparation method and application of the fluorescent probe. 4, 4 '-(iminomethylene) bis (N, N-dimethylaniline) which is slightly soluble in water reacts with acid to form auramine hydrochloride, the water solubility of the auramine hydrochloride fluorescent probe is greatly enhanced, the probe in a water phase is converted into heat (non-radiation decay) due to twisted intramolecular charge transfer and excited state energy caused by benzene ring rotation, and fluorescence quenching is shown; when the viscosity of the solvent is increased, rotation of the benzene ring is blocked, excited state energy cannot be converted into heat and is dissipated in a radiation attenuation mode, fluorescence is enhanced, and viscosity detection of the mask essence with the main component being water is achieved based on the principle. According to the present invention, the method has characteristics of simple synthesis, stable property, no interference of solvent polarity during detection, long-term storage and long-term use, rapid and high-specificity viscosity response ability, and quantitative analysis of viscosity.

The invention provides a preparation method of 1, 4-butanediamine. The preparation method comprises the following steps: carrying out a first hydrogenation reaction on a succinonitrile solution and hydrogen under the catalysis of a first catalyst to obtain a first hydrogenation reaction product; carrying out second hydrogenation reaction on the first hydrogenation reaction product and hydrogen under the catalysis of a second catalyst to obtain 1, 4-butanediamine; wherein the first catalyst is a nickel-based catalyst loaded on Al2O3, and the second catalyst is a noble metal catalyst loaded on C. According to the present invention, the step-by-step hydrogenation method is adopted, the corresponding catalyst is utilized, the hydrogenation depth is controllable, the amino butyronitrile is mainly generated in the first step, and the 1, 4-butanediamine is prepared through the further hydrogenation in the second step, such that the side reaction can be effectively reduced, the produced by-product is less, the separation difficulty is low during the post-treatment, and the product purity is high. The method does not need to add other components such as ammonia gas to inhibit side reaction, and is simple in industrial process flow and easy to popularize and use.

The invention discloses a Salen catalyst. The Salen catalyst has a structure as shown in a formula (I-1). The Salen catalyst is a multi-core catalyst, two or more mononuclear catalysts can be connected into the multi-core catalyst through groups containing amido bonds, the catalytic efficiency, the resolution yield, the recovery rate and the activity after recovery of the catalyst can be improved, and the recovered catalyst can be mixed with a fresh multi-core catalyst for use; and the method still has the advantages of high resolution yield and the like, and can be recycled for multiple times. Besides, when the multinuclear catalyst participates in the resolution reaction, excessive water is not needed, the reaction yield can be increased, the time for splitting the terminal epoxy compound can be shortened, the prepared product is high in purity and few in impurity, and the problems that the final product is difficult to purify and the like can be solved. # imgabs0 #

The invention discloses an application of a SiC QDs catalyst in a photocatalytic benzylamine oxidative coupling reaction. The catalyst takes SiC as a raw material. The preparation method specifically comprises the following steps: dispersing SiC in a hydrofluoric acid-nitric acid mixed aqueous solution, heating to 100 DEG C in a hydrothermal kettle, maintaining for 1-6 hours, taking out, cooling to room temperature, diluting with deionized water, carrying out ultrasonic oscillation, carrying out centrifugal acid removal to obtain neutral large particles, dispersing into deionized water, carrying out ultrasonic treatment, centrifuging, taking supernatant, and carrying out freeze drying treatment to obtain the SiC-based composite material. The SiC QDs catalyst is obtained. By applying the SiC QDs catalyst, the benzylamine can be efficiently subjected to photocatalytic oxidative coupling in an air atmosphere. Compared with the traditional metal photocatalyst, the metal-free nano photocatalyst prepared by the method has the advantage that the catalyst cost is greatly reduced.

The invention discloses a complex with metal located at the center of a rotaxene plane as well as a preparation method and application of the complex, and particularly relates to five types of novel complexes with metal located at the center of the rotaxene plane, in particular to five types of novel complexes with osmium located at the center of the rotaxene plane: [55753] osmium [15] rotaxene, [55735] osmium [15] rotaxene, [55663] osmium [15] rotaxene, [55636] osmium [15] rotaxene and [5555] osmium [15] rotaxene. The [55753] osmium [15] rotaxene 1a-1c can be prepared by respectively reacting P4a, P4b and P4c which are used as raw materials; the [55753] osmium [15] rotaxene 1d-1f can be prepared by a reaction of 1a-1c; [55735] osmium [15] rotaxene 2a-2c, [55663] osmium [15] rotaxene 3a and [55636] osmium [15] rotaxene 4a can be prepared from 1d-1f through different reactions; the [55555] osmium [15] rotaxene 5a-5c can be prepared by a reaction of 2a-2c; the [55555] osmium [15] rotaxene 5d-5f can be prepared by a reaction of 5a-5c; 5 g of [55555] osmium [15] rotaxene, 5 h, 5 i and 5 j can be prepared from 5 d through different reactions. The novel complex with the metal located in the plane center of the rotaxene can be used for catalyzing benzylamine oxidative coupling reaction to prepare imine, the reaction can be carried out in a room-temperature air atmosphere, the amount of the catalyst can be as low as 1 mol%, and the highest yield can reach 85% after 24 hours.

The invention discloses a triarylmethane type I photosensitive dye as well as a synthesis method and application thereof. The structure of the dye is shown as a general formula I; intramolecular charge separation is optimized by regulating substituent groups, and the generation efficiency of superoxide anions and hydroxyl radicals is remarkably improved. According to the synthesis method, 4-diphenylaminobenzaldehyde or 4-vinyl benzaldehyde is used as a raw material, efficient preparation is achieved through the steps of condensation, oxidation and the like, the raw material is easy to obtain, and operation is easy and convenient. The dye has strong absorption at the wavelength of 600-630 nm, is suitable for red light triggered photodynamic therapy (PDT), especially keeps high reactive oxygen yield under the hypoxic condition, and breaks through the oxygen dependence limitation of traditional PDT. Experiments show that the dye can induce ferroptosis of tumor cells, has the functions of fluorescence imaging and treatment, and has wide application prospects in the fields of antitumor drugs, in-vivo fluorescence labeling, photoresponsive functional preparations and the like.

The invention discloses a bimetallic asymmetric reduction Schiff base catalyst for synthesizing ethylene carbonate and a preparation method of the bimetallic asymmetric reduction Schiff base catalyst. According to the catalyst, a diamine compound is subjected to selective single-side protection, the imine reduction position is controlled, and a bimetallic active center is introduced; the controllable synthesis of a product for reducing the outer side imine and a product for reducing the inner side imine is realized; the obtained product is recrystallized to obtain a monoimine-monoamine type ligand with a clear asymmetric structure, the monoimine-monoamine type ligand and metal salt form a bimetallic catalyst, and the catalyst generates a synergistic effect through double active sites and shows high catalytic activity and excellent product selectivity.

The application provides a triarylmethane derivative, a pigment dispersion liquid, a preparation method thereof and a photoresist, and relates to the field of photoresists. The structural general formula of the triarylmethane derivative is: wherein X1 is selected from one of long-chain alkyl groups with a length of C1-C12, X2 is selected from hydrogen or an alkyl group, X3 is selected from one of H, an alkyl group and an aromatic group, and Q is selected from one of a carboxyl group, a sulfonic acid group and a phosphoric acid group. The triarylmethane derivative can generate strong van der Waals force and pi-pi conjugation effect with pigment molecules in a colorant by virtue of the large-plane conjugated triarylmethane skeleton, so as to be firmly anchored on the surface of the pigment particles; the strong polar functional groups such as the sulfonic acid group in the molecular structure of the triarylmethane derivative are combined with the alkaline dispersant, the side long-chain alkyl groups fully act on the dispersion medium, and the re-aggregation of the nano pigment particles is effectively prevented through strong steric hindrance and electrostatic stabilization mechanism, so that the problem of poor dispersion stability is solved.

The invention discloses a method for preparing a remote oxyimidization product based on an olefin 1, 5-HAT strategy, the product and application, and belongs to the technical field of organic synthesis.The method comprises the following steps that unactivated olefin containing a benzoyl skeleton, oxime carbonate, a catalyst and an organic solvent are mixed and then stirred to react under the illumination condition, the solvent is removed after the reaction is finished, and the remote oxyimidization product is obtained. And carrying out purification treatment to obtain the remote oxyimidization product. The method provided by the invention not only is simple and convenient to operate, but also is green and environment-friendly, and provides a novel and potential synthesis strategy for constructing a complex compound skeleton containing a C-N bond and a C-O bond and realizing a remote position bifunctionalization reaction.

The invention provides a Schiff base material of which the molecular structural formula is at least one of the following formulas: the Schiff base material not only has the luminescence characteristic of chiral molecules, but also has the photochromic characteristic of Schiff base, can have the characteristic of intersection luminescence under co-excitation of ultraviolet light and blue-green light, and can be used in a display space of three-dimensional imaging of a static body. The Schiff base material is applied to three-dimensional display of a static body, is high in stability, good in reversibility, low in excitation light source power and low in risk, and can be prepared into devices for commercial application. The invention also provides a preparation method of the Schiff base material and a static body three-dimensional display system containing the Schiff base material.

This invention discloses a dual-wavelength excited Schiff base photo-switching material, a photochromic material, its preparation method, and its applications. The Schiff base photo-switching material of this invention is obtained by reflux reaction of 4-halosalicylaldehyde and a primary amine. Due to the p-π conjugation of the halogen atom with the benzene ring, the electron cloud density at the para position of the halogen atom is slightly higher than that at the meta position, making it easier for the Schiff base to undergo enol-keto configuration conversion, thus improving the luminescence efficiency of the material. Simultaneously, the amino group in the primary amine is not directly connected to the benzene ring, avoiding the conjugation of the C=N bond with the benzene ring on the primary amine side, improving the switching speed, and thus reducing the aggregation-induced fluorescence quenching phenomenon of the material molecules. The Schiff base photo-switching material and photochromic material provided by this invention can be applied in two-dimensional or three-dimensional display devices, light-controlled switching elements, multi-emissivity anti-counterfeiting materials, three-dimensional data storage, and other fields.

The invention discloses a method and application of synthesizing N-aryl ketone imine by an acid-catalyzed ketal method, wherein the method uses Lewis acid or organic acid as a catalyst, and generates N-aryl ketone imine by condensation of aromatic amine and ketal under heating conditions. The advantage of the method is that the condensation reaction of aromatic amine and alkyl ketone with poor nucleophilicity due to electrical or steric reasons still has excellent reaction effect. The method is simple to operate, has high raw material conversion rate, good reaction selectivity, high product yield and good quality. It can be applied to the efficient synthesis of the herbicide dimethenamid.