500results about "Tenebresent compositions" patented technology

Some variations provide a photochromic heterostructure comprising: first semiconductor nanoparticles that have an average first-nanoparticle effective diameter from 1 nanometer to 20 nanometers, wherein the first semiconductor nanoparticles are not doped; and second semiconductor nanoparticles that have an average second-nanoparticle effective diameter from 1 nanometer to 60 nanometers, wherein the second semiconductor nanoparticles are doped with one or more transition metals, wherein the second semiconductor nanoparticles have a bandgap energy that is higher than the bandgap energy of the first semiconductor nanoparticles, and wherein the first semiconductor nanoparticles and the second semiconductor nanoparticles are in physical contact with each other. The disclosed photochromic heterostructure is especially useful when lower-energy light excites lower-energy-bandgap first nanoparticles to cause higher-energy-bandgap, doped second nanoparticles to photodarken. If the first nanoparticles were not present, the doped second nanoparticles would require higher-energy light to cause darkening. Examples demonstrate embodiments of the invention.

The invention relates to the technical field of anti-counterfeiting materials, and particularly discloses a composite color-changing agent, anti-counterfeiting color-changing ink and a preparation method of the anti-counterfeiting color-changing ink. The composite color-changing agent is a composite microsphere with a core-shell-satellite structure, the core is a temperature-sensing color-changing microcapsule and is composed of a temperature-sensing color-changing core material and a polymer wall material, the shell is a transparent polymer shell and wraps the core through in-situ polymerization, the satellite is a light-sensing color-changing material and is embedded and fixed on the shell, and the shell is a transparent polymer shell and is embedded and fixed on the shell. According to the composite color-changing agent, the light-sensitive material and the temperature-sensitive material are compositely inlaid through the polymer shell, so that the problem of poor compatibility of the light-sensitive material and the temperature-sensitive material is solved, the stability and the production efficiency are improved, and the imitation difficulty is increased.

The invention relates to viologen-anthraquinone composite electrochromic liquid and a preparation method thereof, the viologen-anthraquinone composite electrochromic liquid comprises 1.2-2.5 parts by mole of viologen salt, 0.8-1.5 parts by mole of anthraquinone derivative and 8-12 parts by mole of electrolyte; the viologen salt is ethyl viologen tetrafluoroborate or heptyl viologen tetrafluoroborate or octyl viologen tetrafluoroborate; the anthraquinone derivative is 1-ethylamino-4-hydroxy anthraquinone or acid blue 43; the preparation method comprises the following steps: preparing an electrolyte solution; adding purple refined salt and anthraquinone derivatives according to the formula; fully dissolving the electrochromic material to form uniform and transparent initial liquid; and degassing the initial liquid to remove oxygen dissolved in the initial liquid. The electrochromic liquid has the advantages that after the purple refined salt and the anthraquinone derivative are added into the dissolving solution according to the proportion of the formula, the two color-changing materials are jointly dissolved in the electrolyte, and when the two color-changing materials are reduced at the same time, spectrum superposition absorbed by the two color-changing materials can cover the whole visible region, so that black and white switching of the electrochromic liquid is realized, and the use effect is good.

The invention discloses a crystal compound, a preparation method thereof and application of the crystal compound in X-ray detection, imaging and anti-counterfeiting encryption, and belongs to the technical field of crystals. The molecular formula of the crystal compound is [Cu (totp) (CH3CN) 3] [Cu2I3 (totp) (PN)]. (CH3CN), wherein totp is tris (o-tolyl) phosphine; and PN is diphenyl-2-pyridine phosphine. The crystal compound disclosed by the invention is simple in preparation method, and has the characteristics of large mass attenuation coefficient of X-ray energy, high light yield and low detection limit when being used as a material of an X-ray detector. The compound also has the characteristic of structural transformation in solvents such as methanol, ethanol, acetone, dichloromethane, tetrahydrofuran and the like, and meanwhile, the conversion of luminescence color under the excitation of 365nm ultraviolet light and X rays is accompanied. The material can be applied to the aspects of scintillator materials, room-temperature X-ray radiation indirect detection materials, radiation detection dosimeters, X-ray scintillator medical imaging, anti-counterfeiting encryption and the like.

The present invention relates to electrochromic devices and compositions, in which the cathodic component has cationic charge and includes counter-anions, where each counter-anion of the cathodic component is an anodic component having an anion covalently bonded thereto.

The present disclosure relates to chiral materials and films comprising metal- coordinated organic complexes. Specifically, the invention provides compositions, derivative structures, and methods for the preparation of such materials in solution, as coatings, and in other forms. These films exhibit chiral properties allowing for tunable chiral-electrochromic capabilities for optoelectronic devices, and display technologies.

The invention discloses a diarylethene compound as well as a preparation method and application thereof, and belongs to the technical field of organic. The invention provides a diarylethene compound. The chemical formula of the diarylethene compound is as shown in the formula I in the specification. The diarylethene compound provided by the invention has good high-temperature stability, can still keep excellent photochromic performance after high-temperature processing, is high in light-variable response speed, large in light-variable color change amplitude and long in cycle service life, can realize an obvious light-variable effect by adding a small amount, and has wide application prospects. The method can be widely applied to preparation of high-temperature-resistant resin compositions and photochromic materials with obvious light-variable effects.

The invention belongs to the technical field of material science, and relates to a preparation method and application of an unsaturated bond extended tetraphenyl ethylene siloxane compound. An unsaturated bond is introduced into a siloxane group, and the siloxane group containing the unsaturated bond and a tetraphenyl ethylene derivative are subjected to a coupling reaction. The coupling reaction is carried out in an inert atmosphere, the temperature is 90-150 DEG C, and the time is 6-24 hours. And purifying the product by silica gel column chromatography to obtain the target compound. Unsaturated bonds are introduced into a tetraphenyl ethylene structure, so that the adjustability of the photochromic wavelength is realized, the performance of the compound is remarkably improved, the application range of the compound is remarkably widened, and a new thought and a new method are provided for development of photochromic materials.

The present application provides a reversible thermochromic microcapsule pigment which is easily changed to a colored state from a colorless state by heating at a temperature in a living environment temperature range or a temperature close to a daily life temperature, and is sensitively recovered to the colorless state again. The reversible thermochromic microcapsule pigment of the present application is formed by enclosing a reversible thermochromic composition in a microcapsule, the reversible thermochromic composition comprising (A) an electron-donating colored organic compound, (B) a 4-hydroxybenzoic acid ester compound represented by the following general formula (1) as an electron-accepting compound (in the formula, R represents a linear or branched alkyl group having 12 to 22 carbon atoms), (C) a chain hydrocarbon compound or the like as a reaction medium in which reversible electron transfer reactions based on the above (A) and (B) occur, (D) a linear dibasic acid compound having 3 to 22 carbon atoms, and (E) an aromatic hydrocarbon compound or the like having a melting point of 50°C or higher.

A metallo-supramolecular polymer is formed by alternately linking metal cations and organic ligands through coordinate bonds, wherein a metallo-supramolecular polymer containing tris(terpyridine) compounds represented by a formula (B) and bis(terpyridine) compounds represented by a formula (L) as the organic ligands has high coloration efficiency.

This invention relates to a method for preparing and applying polyamides from a monomer containing 7-methyldibenzo[c,g]carbazole and triphenylamine: 4-({9-[(4-aminophenyl)(4-methoxyphenyl)amino]-7-methyldibenzo[c,g]carbazole-5-yl}(4-methoxyphenyl)amino)aniline. To address the problems of low solubility, difficulty in film formation, poor cycling stability, narrow color change range, and limited functionality in polyamide materials, this invention constructs two triphenylamine groups on 7-methyldibenzo[c,g]carbazole and introduces a methoxy group onto the triphenylamine to increase the polymer's solubility and stability. The polymer of this invention exhibits excellent electrochromic properties, including excellent cycling stability, fast switching time, and high optical contrast. Furthermore, to address the material's multifunctionality, a naphthalene unit is added to the molecular structure, resulting in a polymer with fluorescent emission. This invention can be applied to displays, rearview mirrors, camouflage applications, and the fluorescence detection of p-trinitrophenol.

The invention relates to the technical field of organic synthesis, and particularly provides a thiophene-containing tetraarylethene compound as well as a preparation method and application thereof. According to the invention, two phenyl groups of tetraphenylethylene are replaced by methyl formate thiophene groups, and the substituted tetraarylethylene compound has more remarkable photochromic and mechanochromic dual functions through the interaction of a specific substituent group at the position 2 of thiophene and a large conjugated group formed by four aromatic rings; and light-operated double-color display in a polymer mechanism can be realized. The mechanochromism of the compound does not depend on ultraviolet light, when the compound is subjected to mechanical force, the molecular accumulation mode and conjugate planarity are changed, and the color change can be directly observed by naked eyes. Different from traditional tetraphenyl ethylene force-induced discoloration recessive fluorescence change, the dominant color change can be used in the fields of visual stress monitoring, anti-counterfeiting marks, inkless writing materials, safe ink and the like in ultraviolet-free environments (such as indoor and closed spaces), and the application prospect is wide.

The invention discloses a manganese cobalt oxide and zirconium oxide composite plasma developing material, and belongs to the field of plasma process detection and visual developing materials. In order to solve the problems that an existing plasma indicating material is high in reversibility, unstable in color development, not resistant to high temperature and prone to generating organic pollution, the invention provides a full-inorganic composite color development system which is resistant to high temperature and irreversible in color development. The material is formed by compounding manganese oxide (MnO), cobalt oxide (CoO) and zirconium oxide (ZrO), the molar ratio of Mn to Co is (3-7): 1, and the content of ZrO is 10-40 wt%. Under the action of plasmas, synergistic valence transition from Mn to Mn and from Co to Co occurs in the material, and zirconium oxide is used as a lattice stable phase and an oxygen vacancy buffer phase, so that the high-temperature structural stability and the color development retentivity are remarkably improved. The material still keeps stable color development under the condition of 300-400 DEG C, the color development contrast delta E is larger than or equal to 30, and the material can be prepared through a sol-gel or physical vapor deposition (PVD) method. According to the invention, a high-contrast, irreversible, pollution-free and long-term stable plasma developing indication function is realized, and the device is suitable for visual detection and verification of semiconductors, medical sterilization and high-cleanliness processes.

The invention relates to a gold nanocluster with controllable luminescence color and a preparation method and application thereof. The gold nanocluster is formed by combined action of TSA, chloroauric acid and zinc ions. The gold nanocluster prepared by the invention can show different luminous colors after being heated at room temperature and high temperature, and can be used for information encryption; meanwhile, due to the high-temperature-resistant characteristic, the material can also be used as a thermal trigger mark. The preparation method of the gold nanocluster is simple and low in cost; the detection means is simple and rapid and easy to observe; and repeated use can be realized.

A reversibly thermochromic microcapsule pigment according to the present invention has a reversible thermochromic composition encapsulated in microcapsules, the reversibly thermochromic composition consisting of a compound such as(A) an electron-donating color-developing organic compound,(B) a 4-hydroxybenzoic acid ester compound represented by General Formula (1) below as an electron-accepting compound,(C) a compound such as a chain hydrocarbon as a reaction medium that reversibly induces an electron transfer reaction by the (A) and (B),(D) a linear dibasic acid compound having 3 to 22 carbon atoms, and(E) an aromatic hydrocarbon having a melting point of 50° C. or higher,wherein R represents a linear or branched chain alkyl group having 12 to 22 carbon atoms.

The invention provides powder with reversible photochromic performance as well as a preparation method and application thereof, and the powder with reversible photochromic performance is a photochromic microcapsule and consists of a core material and a wall material, the core material accounts for 30%-50% of the total weight of the microcapsule, and the wall material accounts for 50%-70% of the total weight of the microcapsule; the core material is an indoline spiroheterocyclic compound, and the wall material is a biocompatible polymer. The core material is an indoline spiroheterocyclic compound, and the wall material is a biocompatible polymer; the powder is prepared by taking indoline spiropyran as a photochromic core material through a microcapsule coating process, has reversible response characteristics of developing under ultraviolet irradiation and decolorizing under strong light irradiation, and can be compounded with a tattooing pigment matrix to obtain a tattooing product with active developing and decolorizing regulation and control functions. The problem that the photochromic tattoo pigment is irreversible in color change is solved, and meanwhile the photochromic tattoo pigment has good stability and biocompatibility.

The purpose of the present invention is to provide a photochromic compound which can exhibit photochromic characteristics regardless of a matrix, and is stably dispersed and present without being aggregated in an optical substrate forming process (during curing).　According to the present invention, a polymer photochromic compound, which has a group having a shape of a block polymer of an oligomer chain group having relatively excellent compatibility with a solid matrix and an oligomer chain group having poor compatibility with a solid matrix, forms a nano- to micro-phase separation structure in a solid matrix, improves dispersibility regardless of a solid matrix, and suppresses aggregation. As a result, a high level of photochromic characteristics can be exhibited.

This invention relates to the field of electrochromic thin film technology, and more particularly to a dithiophene derivative, its preparation method, and its application, as well as an electrochromic thin film and its preparation method. This invention involves reacting dithiophene with tributyltin chloride to generate tin-modified dithiophene, reacting dithiophene with isopropanol pinacol boronic acid ester to generate boron-modified dithiophene, and then reacting the tin-modified or boron-modified dithiophene with 1,4-diiodo-2,5-bis-(6-hexynyl)-benzene to generate 1,4-dithiophene-2,5-bis-(6-hexynyl)-benzene. This product is then reacted with dimethylboron hydride generated from lithium aluminum hydride and dimethoxyethane to finally obtain the dithiophene derivative. This derivative can be applied in electrochromic thin films. This invention successfully prepares an electrochromic thin film with fast response and fluoride ion detection capability by electrochemically polymerizing the dithiophene derivative.

The invention provides thermochromic microcapsules, thermochromic silica gel, a preparation method of the thermochromic silica gel and a physiotherapy pad. The thermochromic microcapsule comprises a core material and a wall material coating the outer surface of the core material, and the core material comprises stearic acid, crystal violet lactone and bisphenol fluorene. The wall material is formed by in-situ polymerization of an amino resin prepolymer on the surface of the core material. The bisphenol fluorene has a fluorene ring, and the fluorene ring is of a large-size and flat structure, so that the rigidity of bisphenol fluorene molecules is high. When the amido resin prepolymer is subjected to in-situ polymerization on the surface of the core material to form the wall material, part of bisphenol fluorene molecules can be embedded into a cross-linked network of the amido resin, and the rigid bisphenol fluorene molecules can well limit movement and rotation of amido resin polymer molecular chains; besides, in the polymerization process, bisphenol fluorene molecules can serve as cross-linking points to react with the amino resin prepolymer, different polymer chains are effectively connected, the cross-linking density of the wall material is improved, and the bisphenol fluorene molecules can effectively improve the mechanical strength and hardness of the wall material.

The application discloses a conjugated polymer of chlorobenzene, o-dichlorobenzene or m-dichlorobenzene and EDOT as well as a preparation method and application thereof, and belongs to the field of polymer electrochromic materials. By introducing chlorine atoms as intermediates in different active sites of benzene and EDOT as a strong electron-donating group, the obtained conjugated polymer has the characteristics of a wider redox peak, good optical contrast, fast response time, high coloring efficiency, good stability and the like.

The invention relates to the technical field of nondestructive testing of low-carbon steel, and particularly discloses a thermal double-sensitive composite coating as well as a preparation method and application thereof. The thermal double-sensitive composite coating comprises a stress sensitive fluorescent layer and a thermochromic layer, the stress sensitive fluorescent layer adopts core-shell hybrid particles with a force-induced fluorescence enhancement effect as key functional filler, and the thermochromic layer adopts an IPN-based irreversible thermochromic material as a core functional material. The stress-sensitive fluorescent layer and the thermochromic layer are prepared from novel self-made functional materials, so that the thermal double-sensitive composite coating has the functions of high-sensitivity signal sensing, optical enhancement and permanent recording, and is assisted by a load excitation and digital image analysis process; stress-temperature coupling field information excited by the deep defect under the load is converted into a visual signal which is high in strength, high in anti-interference performance and capable of being recorded permanently, and accurate positioning, quantification and classification of the defect are achieved.

A tungsten oxide coating material for an electrochromic device that is a coating material for forming a tungsten oxide thin film having electrochromic characteristics, the coating material comprising: a solvent; tungsten oxide nanoparticles dispersed in the solvent; and a binder, wherein in the tungsten oxide nanoparticles, a half-value width of a peak detected at 29° ±1° in X-ray diffraction analysis (2θ) is 2° or less, and a primary particle size is 5 to 25 nm.

The invention discloses a photochromic polyacrylate material, a photochromic adhesive sheet and a preparation method of the photochromic polyacrylate material. The photochromic polyacrylate material is prepared from the following raw material components in parts by weight through free radical copolymerization: 2.5-10 parts of a photochromic monomer; 6-24 parts of a soft monomer; 9-36 parts of a hard monomer; 3-12 parts of a functional monomer; 0.07 to 0.28 part of an initiator; and 30-120 parts of a first solvent. According to the invention, a photochromic group is connected to a polymer main chain in a chemical bond form in a copolymerization manner, so that the problem that toner is easy to separate out in physical blending is thoroughly solved, and the uniformity and stability of the material are remarkably improved; the photochromic polyacrylate material prepared by the preparation method disclosed by the invention is excellent in photochromic performance and strong in durability, and can still keep stable color change after multiple light cycles; the preparation method disclosed by the invention is simple to operate and high in feasibility, industrial production is easy to realize, and powerful technical support is provided for practical application of the photochromic material.

The present invention provides a composition suitable for use in switchable mirror devices, said composition comprising, dissolved in a solvent, a reducing compound E, a metal cation Mn+, and an organic ligand L able to form a coordination complex with Mn+, wherein E does not spontaneously reduce oxidized metal present in the composition, and wherein L comprises the following moiety I: Wherein X and X' are independently selected from O, and.

The application discloses a kind of tetraphenyl ethylene-chalcone derivative preparation and its application preparation and its application.The structure is as follows: the method includes: 4-(1,2,2-triphenyl ethenyl) acetophenone, aldehyde derivative, sodium hydroxide (provides alkaline condition, pH=8.3~8.5), is placed in anhydrous ethanol, under the condition that heating temperature is 80 DEG C, reflux reaction 12h, after reaction is ended, the functional organic material is separated and purified.The functional organic material synthesized according to the above method has larger conjugated system, and has significant pressure-induced color change characteristics.The functional organic material disclosed in the application has low preparation cost, simple operation, simple method, and the material shows significant pressure-induced color change characteristics, can be applied to pressure-induced color change, luminescent material, printing and dyeing, color printing and anti-counterfeiting technical field.

An electrochromic polymer includes a formula of . MCL represents a meta-conjugated linker, and Ac represents an aromatic moiety. The disclosed electrochromic polymer has an absorption onset equal to or smaller than 420 nm in a neutral state and has absorption in visible and / or near-infrared wavelengths in an oxidized state, thus the disclosed electrochromic polymer shows a high transparency and a high optical contrast when used in electrochromic devices.

Photochromic polyimide material and preparation method, coating, coating, optical device and application; photochromic polyimide material, by introducing photochromic unit into polyimide structure, the material can quickly respond and present color change under ultraviolet light irradiation, and restore to colorless state by visible light or heating; and the polyimide matrix provides high mechanical strength, thermal stability and chemical resistance, so that the material maintains stable color changing ability in multiple light-color changing cycles. At the same time, the weather resistance of the material is greatly improved, which can adapt to outdoor and harsh environment, and expands the application prospect of the material in the fields of intelligent coating, optical device, sensor and the like, thereby solving the problem that the existing photochromic material cannot simultaneously have photoresponsivity, mechanical performance, chemical stability and weather resistance.

The invention concerns a composition for forming an electrochromic layer which composition comprises or consists of the following components: Nanoparticles of electrochromic material, a solvent, a surface ligand adsorbed on the surfaces of the nanoparticles and either a photoacid, wherein the photoacid is also adsorbed on the surfaces of the nanoparticles, or decomposition products resulting from decomposition of a photoacid by irradiation, wherein the decomposition products are also adsorbed on the surfaces of the nanoparticles, wherein the decomposition products are organic components, acidic components, protons, cationic components, anionic components and / or radical components, wherein the nanoparticles in the composition are colloidal nanoparticles uniformly distributed within the solvent.