32 results about "Azobenzene" patented technology

This invention discloses a visible-light-responsive dynamically covalently cross-linked self-healing polyurethane and its preparation method, belonging to the field of self-healing materials technology. The material is prepared by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and a monool containing an azophenylboronic acid structure in a certain proportion at 60°C. This invention achieves visible-light-responsive self-healing of the polyurethane material by introducing a visible-light-responsive azophenylboronic acid structure into the polyurethane and utilizing the photoresponsive cis-trans isomerization of the azo structure to regulate the reversible breakage and recombination of the boron-oxygen hexacyclic ring. The visible-light-responsive dynamically covalently cross-linked self-healing polyurethane material prepared by this invention maintains high mechanical strength (16.47 MPa) while exhibiting a strength self-healing efficiency of 95.8% after 8 hours of visible light irradiation, showing broad application prospects in smart materials, anti-corrosion coatings, and other fields.

This invention discloses a polishing method and apparatus for nickel-based alloys based on photocatalysis and photothickening synergy. It achieves dual-driven processing by simultaneously triggering photocatalytic workpiece surface modification and photo-triggered thickening of the polishing slurry through an integrated dual-light system, realizing surface softening and medium thickening. Composite abrasive particles loaded with TiO2 / ZnO photocatalysts form a low-hardness oxide layer on the nickel-based alloy surface under ultraviolet light irradiation, reducing processing resistance. Precise viscosity control of the polishing slurry is achieved through azobenzene / cinnamic acid photochromic molecules, combined with shear-induced particle agglomeration to form a dual thickening system, improving viscosity stability. This invention solves the technical pain points of work hardening in nickel-based alloys, large viscosity fluctuations in traditional shear-thickening polishing slurries, and poor processing uniformity, improving processing efficiency and workpiece surface quality. It is suitable for efficient and precise machining of difficult-to-machine nickel-based alloys such as Inconel 718 and GH4169.

A green synthesis method of azoxybenzene compounds, in an organic solvent, using aromatic amine or aromatic heteroamine as raw material, using an oxidant and a catalyst to form a reaction system, selectively oxidizing the aromatic amine into the corresponding azoxy compound; wherein the catalyst is one or several of NaOAc, sodium formate, KF, NaF, CsF, CaF2 and R''4NF, wherein R'' is one of alkyl, methyl, ethyl and butyl; the catalyst used in the application has low cost, high activity, good selectivity and small environmental pollution compared with the metal catalyst of the prior art, and conforms to the green environmental protection concept; at the same time, the catalyst has small dosage, and does not need to consider catalyst recovery treatment and other problems, greatly simplifying the operation steps.

This invention discloses a composite layer and its application, relating to the technical field of marine engineering protective materials. A composite layer includes, from top to bottom, a photochromic stealth layer, an interface coupling layer, and a toughened and blast-resistant layer. The photochromic stealth layer comprises a polymer matrix and photosensitive liquid crystal microcapsules embedded in the polymer matrix. The photosensitive liquid crystal microcapsules are filled with an azobenzene-based liquid crystal material, and a conductive layer is disposed on the surface of the photosensitive liquid crystal microcapsules. The interface coupling layer includes, from bottom to top, a flexible layer, a transition layer, and a rigid layer. The shear-toughened and blast-resistant layer comprises an epoxy resin matrix, a biomimetic neural bundle network embedded in the epoxy resin matrix, and a shear-thickening liquid. The composite layer of this invention possesses excellent optical stealth performance, impact resistance, and environmental adaptability, making it suitable for dynamic camouflage and impact protection of deep-sea equipment, underwater vehicles, and marine engineering structures.

The application belongs to the technical field of fluorescent analysis and detection, and particularly relates to a tridentate Schiff base compound and a preparation method and application thereof. 2 The formylhydrazine Schiff base compound is widely applied in coordination chemistry, and a parent structure thereof can be used to better study the transformation of a complex under light stimulation, and the imino group also has good photoisomerization performance, at this time, the light stimulation can catalyze the ligand to produce more rich coordination modes, so the isomerization phenomenon of the compound under the action of ultraviolet light is tested, and the application of the compound in a colorimetric chemical sensor is studied. Further research is conducted on whether the compound has different ion selectivity after the conversion configuration under the action of ultraviolet light and the change of the coordination mode, and finally, the complex of the ligand Ni 2+ , Cu 2+ metal is synthesized.

A composite electrode for absorbing and desorbing phosphates in a liquid includes a carrier, and a composite laminated structure including a layered double hydroxide unit which includes at least two layered double hydroxide layers, and an azobenzene unit which includes at least one azobenzene layer. The at least one azobenzene layer of the azobenzene unit contains an azobenzene component. When the azobenzene unit is subjected to irradiation with an ultraviolet light, the azobenzene component in the at least one azobenzene layer of the azobenzene unit has a cis-structure, so that the composite laminated structure is in an absorption state. When the azobenzene unit is subjected to irradiation with a visible light, the azobenzene component in the at least one azobenzene layer of the azobenzene unit has a trans-structure, so that the composite laminated structure is in a desorption state.

The application discloses a preparation method and application of a double-stimulus-responsive driver film, and belongs to the field of double drivers. The application takes azobenzene monomer and isocyanate as raw materials, obtains a polymer solution through a step-by-step addition polymerization reaction, and pours the polymer solution in a polytetrafluoroethylene mold to obtain a driver film with light / humidity double-stimulus responsiveness. Due to the reversible molecular configuration transformation of azobenzene and the great difference in film hygroscopicity, the driver film has a quick and sensitive reversible bending deformation behavior under light and humidity stimulation, and has important application value in the field of intelligent bionics.

This invention discloses a visible-light-responsive dynamically covalently cross-linked self-healing polyurethane and its preparation method, belonging to the field of self-healing materials technology. The material is prepared by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and a monool containing an azophenylboronic acid structure in a certain proportion at 60°C. This invention achieves visible-light-responsive self-healing of the polyurethane material by introducing a visible-light-responsive azophenylboronic acid structure into the polyurethane and utilizing the photoresponsive cis-trans isomerization of the azo structure to regulate the reversible breakage and recombination of the boron-oxygen hexacyclic ring. The visible-light-responsive dynamically covalently cross-linked self-healing polyurethane material prepared by this invention maintains high mechanical strength (16.47 MPa) while exhibiting a strength self-healing efficiency of 95.8% after 8 hours of visible light irradiation, showing broad application prospects in smart materials, anti-corrosion coatings, and other fields.

This invention relates to a modified graphene-containing film and its preparation method, belonging to the field of polymer composite materials technology. The method involves reacting and grafting composite graphene powder with an azobenzene compound containing silane and a silane containing double bonds, followed by melt blending and casting with low-density polyethylene particles to obtain a modified graphene-containing film. This allows the silicon-oxygen-containing azobenzene compound to be uniformly dispersed in the film. Under ultraviolet light irradiation, the azobenzene molecules transform into a bent cis isomer. Isomerization leads to a decrease in the horizontal arrangement of azobenzene molecules and a change in intermolecular spacing, causing the film to bend towards the light. Under visible light irradiation, the azobenzene isomerizes from cis to trans, and the film material returns to its original shape. The one-dimensional rod-like structure and the two-dimensional sheet structure of graphene oxide form a "rod-sheet" synergistic reinforcement structure, preventing aggregation and improving the dispersibility of graphene oxide in the film matrix.

This invention provides a method for the deep reduction of phenazine waste residue. The phenazine waste residue generated during RT-PS production is hydrogenated and reduced to cyclohexylamine using a supported nickel catalyst. This invention, through deep reduction, converts phenazine, azobenzene, aniline, and other components in the phenazine waste residue into cyclohexylamine, solving the problem of difficult disposal of phenazine waste residue and realizing its resource utilization. This significantly reduces waste residue emissions during RT-PS production.

The inventive concept relates to a block copolymer for lithography, capable of self-assembling and self-healing, and more particularly, to a block copolymer including a first block which is a repeating unit of polymerized siloxane and a second block which is a repeating unit of polymerized alkyl azobenzene acrylate. The alkyl is a linear or branched chain of 1 to 10 carbon atoms, the number (x) of the repeating unit of polymerized siloxane is about 60 to about 80, and the number (y) of the repeating unit of polymerized alkyl azobenzene acrylate is about 15 to about 25. The block copolymer has a cylindrical phase.

This invention discloses a dark-colored reverse dimming film, belonging to the field of dimming film technology. It comprises an upper conductive substrate, a dark-colored reverse dimming composite layer, and a lower conductive substrate, stacked sequentially from top to bottom. The preparation method of the dark-colored reverse dimming film includes: 1) preparation of the dark-colored reverse dimming composite layer slurry; 2) thin film coating and lamination; and 3) curing. This invention employs two electric field-responsive color-tuning compounds based on stable anthraquinone fused rings. Through their broad spectral characteristics, they synergistically cover the entire visible light spectrum, achieving a deep neutral black state with only binary compounding. This fundamentally solves the color drift problem caused by the narrow spectrum and asynchronous stability of traditional three-component azobenzene color-tuning systems. Simultaneously, the color-tuning compounds possess dielectric anisotropy highly matched with microcrystalline media, enabling millisecond-level synchronous switching. This allows the device to instantly switch between a dark state when power is off and a high-transmittance state when power is on, and also exhibits excellent weather resistance and a significantly extended lifespan.

This invention discloses a photoresponsive multifunctional polyurethane material based on azophenylboronic acid and its preparation method, belonging to the field of photoresponsive self-healing materials technology. The material is prepared by a monool-terminated polyurethane containing an azophenylboronic acid structure, specifically by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and the monool containing the azophenylboronic acid structure in N,N-dimethylformamide at 70°C for 3 h. This invention introduces the azophenylboronic acid structure into the polyurethane system and utilizes the photoinduced reversible isomerization effect of azophenyl to achieve precise control over the dynamic covalent bond breaking and recombination of boron-oxygen hexacyclic rings. This design endows the material with excellent photo-induced self-healing properties, achieving a self-healing efficiency of 96.9% under 365 nm and 450 nm light irradiation. Simultaneously, the material also exhibits photoresponsive color change and humidity-responsive deformation characteristics, showing broad application prospects in the field of smart polymers.

The present application relates to a single molecular weight chiral azobenzene oligomer and a preparation method and application thereof, and belongs to the technical field of oligomers. The molecular formula of the single molecular weight chiral azobenzene oligomer is wherein N=2, 4, 8, 12 or 16. The single molecular weight chiral azobenzene oligomer can control the aggregation mode and supramolecular chiral expression of the assembly by controlling the size of the oligomer molecular weight and the proportion of the assembly solvent, realizes the precise construction and preparation of the supramolecular chiral structure, and has good application prospects in the fields of chiral switches, molecular recognition and molecular device design.

The application relates to an azobenzene quencher unit, a preparation method thereof, a solid-phase synthesis carrier, a preparation method thereof, and a nucleic acid probe. The structural general formula of the azobenzene quencher unit is shown in the following formula: wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12 and R13 are independently hydrogen, methyl, ethyl, propyl, isopropyl, phenyl, biphenyl, 2-furyl, 2-thienyl, methoxy, ethoxy, isopropoxy, nitro, nitroso or cyano, n=0-6, and m=2-12. The azobenzene quencher unit contains a polyfluorocarboxylic acid connecting structure. The azobenzene quencher unit is connected to the solid-phase synthesis carrier through the formation of an amide bond between the carboxylic acid of the polyfluorocarboxylic acid connecting structure and the amino group on the surface of the solid-phase synthesis carrier, and is used for synthesizing nucleic acids. The synthesis yield of 3' azobenzene quencher-labeled nucleic acids can be effectively improved.

The application discloses a nucleic acid fragment for binding and blocking a helicase and application thereof. The nucleic acid fragment comprises a first segment for binding the helicase and a second segment for blocking the helicase, at least one phosphate group in the second segment is modified by at least one of a dithiol, an azobenzene and an amino group extended by a (CH2)6 carbon chain, or at least one nucleotide residue in the second segment is L-DNA. The nucleic acid fragment can realize the blocking of the helicase.

The wisdom utilization of nuclear energy plays a core and irreplaceable role in consolidating national defense security and transforming energy system to green. While the nuclear energy technology is booming, how to properly manage and efficiently resource the depleted uranium (especially 238 U, although it does not constitute direct radioactive hazard to human body) generated in the process of nuclear energy application has become an urgent and key technical challenge in the field of environmental protection and sustainable development. In particular, we use U3O8 prepared from depleted UF6 as raw material, and use UO4·2H2O prepared by simple dissolution and precipitation as catalyst to catalyze the synthesis of diphenyldiazene or its derivatives from aniline: one aspect of the invention creates a way to reuse depleted uranium waste, finding a new way to transform this traditionally difficult waste, and on the other hand, it ingeniously builds a bridge from aniline and its derivatives to high value-added chemicals-diphenyldiazene or its derivatives. Not only can it effectively reduce the potential threat of depleted uranium waste to the environment, realize the green transformation and resource utilization of waste, but also can promote the chemical industry to a more efficient and environmentally friendly direction, and bring significant economic benefits to the chemical industry.

This invention relates to a compound containing an azobenzene structure or a pharmaceutically acceptable salt, cis-trans isomer, tautomer, solvate, polymorph, or prodrug thereof; the compound provided by this invention is based on the original adenosine A... 2A Based on the structure of receptor antagonists, an azobenzene structure is introduced, making adenosine A... 2A Receptor antagonists possess light-controlled switching properties, and the compounds of this invention can act as adenosine A. 2A Receptor antagonists applied to adenosine A 2A In receptor-mediated diseases, the light-controlled switching properties of the compounds provided by this invention enable them to achieve local efficacy through light irradiation after systemic administration. Some compounds provided by this invention exhibit a fourfold increase in antagonistic activity under specific wavelengths of light irradiation, while others exhibit a fourfold decrease in antagonistic activity under specific wavelengths of light irradiation. In in vivo animal experiments, compound 1 provided by this invention significantly increases the motor ability of mice after light irradiation.

The application discloses a preparation method of a bile acid-norfloxacin compound, which comprises the following steps: reacting bile acid and norfloxacin in the presence of 2-(7-azobenzotriazole)-N,N,N',N'-tetramethyluronium hexafluorophosphate and diisopropylethylamine in THF solvent at 10-30 DEG C for 12-30 h, and then carrying out post-treatment to obtain the bile acid-norfloxacin compound. The bile acid-norfloxacin compound is obtained by condensation reaction between the carboxyl group of the bile acid and the piperazine group of the norfloxacin, and the compound structure is combined with the bile acid and the norfloxacin. The antibacterial activity of the norfloxacin is obviously improved, the norfloxacin has better inhibition effect on Escherichia coli, Helicobacter pylori and the like, and also has better inhibition effect on Pseudomonas aeruginosa, Staphylococcus aureus and Pneumococcus, and meanwhile, the preparation operation process is simple.

This invention discloses a method for preparing a multi-responsive self-healing gel, comprising the following steps: firstly, synthesizing 4-hydroxyazobenzene, the azobenzene crosslinking agent shown in formula (1), and the 3-acrylamidophenylboronic acid functional monomer; then, dissolving β-cyclodextrin and 3-acrylamidophenylboronic acid in an alkaline solution, sequentially adding the compound of formula (1) and the acrylamide monomer, and finally, performing free radical polymerization at room temperature under the action of an oxidation-reduction initiation system composed of ammonium persulfate and tetramethylethylenediamine to obtain the gel. The preparation conditions of this invention are mild and the operation is simple. The resulting gel can undergo reversible gel-sol phase transition under ultraviolet / visible light irradiation, pH changes, or temperature rises and falls, while exhibiting good self-healing properties, sensitive response, and good cycle stability. It has broad application prospects in the fields of drug controlled release, biosensing, and intelligent actuators.

The application discloses an azobenzene functionalized covalent organic framework material and a preparation method thereof, and belongs to the field of functional polymer materials. Azobenzene groups in the azobenzene functionalized covalent organic framework material change from trans to cis isomerization under the action of ultraviolet light. The specific surface area change rate of the azobenzene functionalized covalent organic framework material is 12% to 20% before and after 365 nm ultraviolet light irradiation, the pore volume change rate is 15% to 40%, and the pore size change rate is 7% to 10%. The azobenzene functionalized covalent organic framework material has high crystallinity, high stability and high specific surface area, and can spontaneously adjust a pore environment under ultraviolet light irradiation.

This invention discloses a high-temperature resistant liquid crystal polymer substrate for ultra-thin flexible displays, belonging to the field of flexible display technology. The substrate of this invention comprises a modified liquid crystal polymer and functional additives dispersed therein. The modified liquid crystal polymer is polymerized from a monomer composition, specifically consisting of 38-42 parts of p-hydroxybenzoic acid, 28-30 parts of 4,4'-biphenylhydrazine, 5.6-6.0 parts of terephthalic acid, 4.4-5.0 parts of 2,6-naphthalenedicarboxylic acid, 2.7-3.3 parts of isophthalic acid, and 2,2-bis(3,5-difluoro-4-hydroxybenzene). The composition comprises 9-11 parts of hexafluoropropane, 4.5-5.5 parts of N,N'-dihydroxypyromellitic acid diamine, 9-11 parts of 9,9-bis[4-(4-methoxycarbonylphenoxy)phenyl]fluorene, and 5.5-6.5 parts of 1,4-cyclohexanediethanol; the functional additives include azobenzene derivatives, thermal acid generators, and hydrogen bond enhancers; the present invention overcomes the technical bottleneck of existing materials in achieving a balance between heat resistance, transparency, dimensional stability, and flexibility through the synergistic effect of specific monomer combinations, functional additives, and optimized processes.

The application discloses an azobenzene-based heterochain fluorescent polymer and a preparation method and application thereof, and relates to the technical field of heterochain polymer luminescence. The method uses azobenzene epoxide alkane as raw material, and obtains the azobenzene-based heterochain fluorescent polymer through bulk polymerization, melt polymerization or solution polymerization under the action of a catalyst; the azobenzene-based heterochain fluorescent polymer obtained by the method has good solubility in various organic solvents, and the luminescence property of the polymer can be changed by adjusting the concentration and inducing photoisomerization of the azobenzene group, so that the azobenzene-based heterochain fluorescent polymer has good application potential.

The application discloses a preparation method and application of a polysulfoamide compound, and belongs to the technical field of polysulfoamide compound synthesis; and comprises the following steps: using azobenzene modified lipoic acid monomers and amide type lipoic acid derivatives as raw materials, and preparing a polysulfoamide compound through a copolymerization reaction; the lipoic acid monomers are modified in an amide structure, different amide structures are introduced to construct a hydrogen bond density adjustable system, and an azobenzene group is introduced to realize photoresponsive functionalization, so that a series of azobenzene modified polysulfoamide compounds with different amide structures are prepared; the preparation condition is mild, the process is simple, the prepared polysulfoamide compound has excellent green light reversible phase change, photo-thermal efficiency and bonding strength performance; and the application has good industrialization and application prospect.

The application discloses a kind of polyimide and preparation method thereof, it is related to high polymer material technical field;High-temperature-resistant polyimide is prepared by 4,4'- azobenzene anhydride and aromatic heterocyclic diamine through polycondensation and imidization reaction, and aromatic heterocycle includes at least one of imidazole, pyrimidine, pyridine, oxazole, thiazole;The application simultaneously introduces azo bond and aromatic heterocycle into the main chain of polyimide, enhances the chain rigidity and chain interaction of polyimide, and the glass transition temperature of the prepared polyimide film is greater than 400 DEG C, meets the high-temperature processing requirement of flexible device, and greatly reduces the preparation process difficulty and production cost of high-temperature-resistant polyimide.

This invention provides a method for preparing a photoresponsive supramolecular nanopesticide formulation and its application in enhancing pesticide target delivery. The method includes: preparing a hollow mesoporous silica nanocarrier using a template method, and introducing a photoresponsive azobenzene-4,4'-dioxaacetic acid guest molecule on its surface after amination modification to construct an azobenzene photoresponsive hollow silica porous nanocarrier. Subsequently, a fungicide and a hydroxy quaternary ammonium salt column[6] aromatic host molecule are added, and a photoresponsive supramolecular nanopesticide formulation is prepared by a one-step supramolecular host-guest self-assembly method. This supramolecular pesticide formulation has the characteristics of high drug loading, strong stability, good deposition and adsorption, and dynamic intelligent response release. In targeted application, the supramolecular pesticide formulation enhances the affinity between the pesticide solution and the leaf surface by utilizing electrostatic and hydrogen bonding effects to achieve high-speed impact deposition and spreading. Combined with its photoresponsive precise controlled release of fungicide behavior, it greatly improves the pesticide target delivery rate, which is of great significance for achieving pesticide reduction and efficiency enhancement.