769results 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 provides an application of N '1, N' 3, N '5-tri ((E)-4-(diphenylamino) benzylidene) benzene-1, 3, 5-tricarbohydrazide (TBTCH) as a piezo-chromic material. The invention provides a novel application of the compound TBTCH, and research shows that the compound has a polycrystalline state property and a piezochromic property, and has two single crystal structures TBTCH-c and TBTCH-g which emit cyan and green fluorescence under different wavelengths; under the action of pressure, the TBTCH-g is converted into an amorphous state from an original crystalline state and is converted into a yellow state sample, and the TBTCH-g can recover to the original state after being fumigated, so that the TBTCH-g has reversible piezochromism performance; and the TBTCH-c changes color under the action of pressure and cannot recover to the original state through a conventional fumigation method, but the TBTCH-g and the TBTCH-c can realize conversion between the TBTCH-g and the TBTCH-c through recrystallization. Therefore, the compound TBTCH can be used as a photochromic material to be applied to the fields of information encryption, intelligent display, biosensing, environmental monitoring and the like.

The invention provides a high-performance electrochromic compound capable of realizing switching between a blue system and a transparent state by adjusting the proportion of a polymer receptor and a preparation method of the high-performance electrochromic compound. The electrochromic film prepared on the basis of the compound shows a blue system in a neutral state, and the color is switched to a transparent state along with the increase of external voltage. The optical contrast of the electrochromic compound in the wavelength range of 642 nm is 52.65%, the coloring time is 0.65 s, and the fading time is 0.32 s. The optical contrast ratio of the electrochromic film can keep 95.29% of the initial contrast ratio after 1000 cycles under the step voltage of 0V and 1.0 V. The electrochromic film is a solution-processable electrochromic material which has excellent performance and can be switched between blue and transparent colors.

The invention provides a preparation method of a cellulose-based water-induced deformation and color-changing film. Water-induced deformation and color-changing response are realized synergistically. The film is mainly prepared from the following components in parts by weight: 16.67 to 25 parts of hydrophilic micelle, 33.33 to 50 parts of absolute ethyl alcohol, 10 to 16 parts of modified cellulose, 12.5 to 20 parts of cross-linking agent and 2.5 to 4 parts of red dye. The cellulose-based water-induced deformation and color-changing film can realize deformation and color-changing response at the same time, the water absorption rate and the water absorption capacity of the two surfaces of the film are regulated and controlled by utilizing the content difference of hydrophilic micelles in the upper surface and the lower surface of the film, and the water-induced deformation response of the film is realized. Meanwhile, after the thin film absorbs water and swells, the microstructure arrangement in the thin film is changed due to the increase of the volume, so that incident light generates a stronger scattering effect in the material, and the hydrochromic behavior of the thin film is realized. The cellulose-based water-induced deformation and color-changing film has synergistic deformation and color-changing response to water stimulation, and has great application potential in the fields of actuators, wearable electronic equipment, intelligent robots and the like.

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.

Provided is a temperature-responsive fluorescent particle comprising at least one type of fluorescent molecule in a molecular assembly comprising and constituted by at least one type of amphiphilic molecule, wherein the fluorescent molecule emits fluorescence when the molecular assembly is in the liquid phase and it is quenched when the molecular assembly is in the solid phase, due to a temperature-responsive solid-liquid phase transition, so that fluorescence emission and quenching of the fluorescent molecule are reversibly switched in a temperature responsive manner. Also provided is a temperature-responsive fluorescent probe comprising the temperature-responsive fluorescent particle the surface of which is modified with a biomolecule recognition element, and methods for detecting and quantitatively determining a biomolecule with the temperature-responsive fluorescent probe.

The invention discloses a thiophene site specific modified TAE material as well as a preparation method and application thereof, and relates to the technical field of organic optical functional materials. A main body structure of the TAE material specifically modified by thiophene sites is tetraarylethene, thiophene substitution exists on the tetraarylethene, and R groups are introduced to the tail end of thiophene, or the TAE material specifically modified by the thiophene sites is obtained. The invention also provides an application of the TAE material or the photochemical sensor specifically modified by the thiophene site in photochromism or mechanochromism or cell imaging or safe ink or anti-counterfeiting. According to the invention, through conjugate coupling of a thiophene ring and an ethylene bridged benzene ring, a diarylethene functional unit with light-induced isomerization capability is formed, and the aggregation-induced emission (AIE) performance of the material is remarkably improved while the light response activity is realized. The synergistic effect endows the material with revolutionary potential in the fields of light-operated bimodal patterning technology and multi-dimensional anti-counterfeiting application.

The invention is applicable to the technical field of solid-state charge transfer compounds, and provides a solid-state charge transfer compound and a preparation method and application thereof, the solid-state charge transfer compound is EtLP6 alpha-TFTN, ethyl oblique [6] arene EtLP6 is used as an electron donor, and electron-deficient aromatic tetrafluoroterephthalonitrile is used as an electron acceptor. According to the embodiment of the invention, a solid-state charge transfer (CT) compound formed by ethyl oblique [6] arene (EtLP6) and an electron-deficient aromatic receptor (Tetrafluoro-terephthalonitrile-TFTN) is constructed, and the switching type gasochromic property of the solid-state charge transfer (CT) compound on 1, 3-dioxane and 1, 4-dioxane isomer steam is utilized, so that the solid-state charge transfer (CT) compound can be used for realizing the conversion of 1, 3-dioxane and 1, 4-dioxane isomer steam, and the conversion efficiency of 1, 3-dioxane and 1, 4-dioxane isomer steam is improved. The 2, 4-dioxane isomer can be quickly and visually distinguished and detected; according to the embodiment of the invention, the solid-state charge transfer compound can be obtained through simple mechanical grinding, and a complex solvent crystallization process is not involved.

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.

An electro-optic device may comprise a first substrate having a first surface and a second surface; a second substrate having a third surface and a fourth surface, the second substrate disposed in a spaced-apart relationship relative to the first substrate such that the second and third surfaces are generally parallel to and face one another; a first electrode associated with the second surface; a second electrode associated with the third surface; a styrene-ethylene-butylene-styrene (SEBS) anionic exchange membrane disposed between the first and second electrodes; a first compartment defined by the SEBS anionic exchange membrane and the first substrate; a second compartment defined by the SEBS anionic exchange membrane and the second substrate; a cathodic species disposed in the first compartment; and an anodic species disposed in the second compartment.

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.

To provide an object containing a mechanochromism material, a method for producing an object, and a composition.SOLUTION: A method for producing an object includes the step of spraying a substrate with a dispersion solution in which a fluorenylidene-acridan derivative having a specific structure is dispersed in a poor solvent.SELECTED DRAWING: Figure 4

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 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.

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 lithium ion battery negative electrode material with a photochromic characteristic and a preparation method thereof. The molecular formula of the lithium ion battery negative electrode material with the photochromic characteristic is MVMo9O28. Wherein MV is a methyl viologen cation; according to the lithium ion battery negative electrode material with the photochromic characteristic, electron transfer from oxygen atoms to molybdenum atoms occurs under ultraviolet irradiation, and a two-year super-stable charge separation state is formed along with color change of crystals from colorless to blue; when the lithium ion battery negative electrode material with the photochromic characteristic is used as the lithium ion battery negative electrode material, the specific capacity of the battery can be improved in a colored state compared with an initial state; a new strategy is provided for developing a high-performance lithium ion battery negative electrode material, and the ever-increasing energy storage requirement is expected to be met.

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.

"PHOTOCHROMIC MATERIAL OF INDENE STRUCTURE ¢ 2 <39>: 3 <39>: 3,4! NAFTO ¢ 1,2-B! PIRANO, PHOTOCHROMIC ARTICLE, NAETOPIRANO AND NAFTOL". Photochromic materials of the indene structure ¢ 2 <39>, 3 <39> are described: 3,4! Naphtho ¢ 1,2-b! Pyran, characterized by the fact that they are provided with a substituent containing nitrogen or sulfur at the 11-position ring atom, they are substantially free of spiro-substituents at the 13-position and are adapted to provide an increase in sensitivity, visible max lambda or a combination thereof, when measured in the Indenonaftopyran Photochromic Performance Test. Optional substituents may be present at the other positions of the indene structure ¢ 2 <39>, 3 <39>: 3,4! Naphtho ¢ 1,2-bipyrane. Naphthols used to produce photochromic materials and photochromic articles that contain or have coatings that contain at least one of the new photochromic materials or combinations with other photochromic materials are also described.

The present invention relates to a system of at least two types of switchable capsule luminescent pigments, wherein the capsule luminescent pigments are polymer particles with a diameter of 0.1-1000 µm, each containing at least one luminescent substance and a photochemically switchable absorber, wherein a first type of capsule luminescent pigment comprises a first luminescent substance emitting in a first color in the VIS spectral range; a second type of capsule luminescent pigment comprises a second luminescent substance emitting in a second color in the VIS spectral range, wherein the first and the second color are different;and the two capsule luminescent pigments each comprise the same photochemically switchable absorber, wherein the photochemically switchable absorber has a first and a second switching state, and the absorption spectrum of the photochemically switchable absorber in the second switching state strongly overlaps with the excitation spectra of the first and the second luminescent substance. The present invention further relates to a switchable luminescent printing ink comprising a system of at least two types of switchable capsule luminescent pigments as described herein, and to a security document, preferably a banknote, with a switchable luminescent print comprising a system of at least two types of switchable capsule luminescent pigments as described herein.

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.

The present invention relates to, a curable photochromic composition that includes: (a) a photochromic compound; (b) a polyisocyanate including at least two isocyanate groups; and (c) a reactive component having at least two reactive groups that are each reactive with the isocyanate groups of the polyisocyanate. Each reactive group of the reactive component is independently selected from primary amine and imine, provided that at least one reactive group of the reactive component is selected from imine. The curable photochromic composition further includes (d) a non-reactive component that is free of functional groups that are reactive with the polyisocyanate and said reactive component. The present invention also relates to an article that includes: a substrate; and a photochromic layer over at least one surface of the substrate, where the photochromic layer is formed from the curable photochromic composition of the present invention.

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.