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1221results about "Tenebresent compositions" patented technology

Fingerprint extraction method based on mechanochromic pyrenyl derivative

The invention belongs to the technical field of novel fluorescent materials, and particularly discloses application of a mechanical color change pyrenyl derivative in latent fingerprint fluorescence imaging and extraction. The mechanical color-changing pyrenyl derivative can be selectively combined with fingerprint residual substances under the excitation of ultraviolet light through the unique fluorescence response characteristic, so that potential fingerprints form high-contrast fluorescence imaging on smooth or rough surfaces (such as glass, metal, plastic and the like), and the mechanical color-changing pyrenyl derivative is compatible with conventional camera equipment to realize rapid acquisition. The compound design is based on a modular synthesis route, and has the advantages of simple and convenient synthesis process, controllable raw material cost, high reaction yield and the like. The product has excellent thermal stability and chemical stability, can be stored at normal temperature and does not need special treatment, and the practical application threshold is greatly reduced. Compared with a traditional fingerprint developing technology, the method has remarkable breakthroughs in the aspects of sensitivity, substrate adaptability and operation convenience, and an efficient, economical and environment-friendly novel solution is provided for the fields of criminal investigation, forensic identification and the like.
Owner:SHANDONG UNIV OF TECH

Thermophotoelectric triple response liquid crystal dopant and application thereof on intelligent glass

The invention provides a liquid crystal dopant with thermal-photoelectric triple response and an application of the liquid crystal dopant on intelligent glass. The molecular formula of the liquid crystal dopant is shown as a formula (1). The liquid crystal dopant is doped in a liquid crystal material, can respond to temperature, illumination and an electric field at the same time by combining the unique optical and electrical characteristics of the liquid crystal material, and adapts to various environment requirements; a plurality of optical states can be provided to meet energy-saving requirements in different scenes; the light modulation rate is high, the haze is large, and the privacy protection function is strong; the material is simple in preparation process, few in synthesis steps, good in stability and low in raw material cost, can be applied to the fields of residences, commercial buildings, automobiles, airplane windows and the like, and has a wide application prospect.
Owner:SOUTH CHINA UNIV OF TECH

Compound containing urea structure as well as preparation method and application of compound in color developing agent

The invention discloses a compound containing a urea structure as well as a preparation method and application of the compound in a color developing agent, and relates to the technical field of color developing agents. The compound containing the urea structure is a # imgabs0 # structure as shown in a formula 1. The compound containing the urea structure is synthesized through multiple steps of Suzuki reaction, bromination reaction and substitution reaction. The compound is used as an electron donor to be applied to a thermosensitive color development system and forms a color development composition with a phenolic compound and an acidic material, and the activation temperature is as low as 60-120 DEG C. The ureido structure stabilizes a reaction intermediate through a hydrogen bond network, enhances the electron transfer efficiency, and significantly improves the color developing sensitivity; the aryl / heteroaryl substituent optimizes the color contrast through the conjugation effect, and meanwhile, the synergistic effect of the hot-melt filler ensures the stability of the system. Compared with a traditional color developing agent, the color developing agent has the advantages of low-temperature activation, high color developing intensity and excellent weather resistance, is suitable for the fields of thermal printing, anti-counterfeiting materials and the like, and overcomes the defects of high reaction temperature and insufficient stability in the prior art.
Owner:CONNECT WILSON (PENGLAI) CHEM CO LTD

Construction of crystalline supramolecular polymer based on snap ring aromatic hydrocarbon and selective recognition of p-xylene isomer of crystalline supramolecular polymer based on snap ring aromatic hydrocarbon

The invention provides a crystalline supramolecular polymer based on snap ring aromatic hydrocarbon. The polymer is obtained by self-assembling snap ring aromatic hydrocarbon (CLP) and a naphthalimide derivative (NDI-8) through a subject and an object. The crystalline supramolecular polymer (NDI-8 (at) CLPalpha) can fully utilize the synergistic effect of a plurality of weak interactions, so that the charge transfer interaction between molecules can be remarkably enhanced very easily. The crystalline supramolecular polymer constructed based on charge transfer shows excellent gasochromic performance. The p-xylene in the NDI-8-coated CLPalpha p-xylene isomer has efficient identification and detection capability, the color is changed from purple to light pink, and a wide application prospect is provided for the development of stimuli-responsive materials.
Owner:NORTHWEST NORMAL UNIVERSITY

Temperature sensing material, molded article, and production method for temperature sensing material

The temperature sensing material of the present invention contains 100 parts by mass of a thermoplastic resin (A) having its density, MFR and durometer A hardness in specific ranges, 10 to 100 parts by mass of a compound (B) having a flash point of 155° C. or higher, and 1.5 to 20 parts by mass of a porous inorganic compound (C) having an oil absorption of 4.0 g / g or more, in which a content of the compound (B) is more than 200 parts by mass and less than 700 parts by mass relative to 100 parts by mass of the porous inorganic compound (C), and the temperature sensing material has specific optical properties.
Owner:MITSUI CHEMICALS INC

Doped-nanoparticle photochromic heterostructures

ActiveUS12509624B1Tenebresent compositionsLuminescent compositionsSemiconductor NanoparticlesNanoparti cles
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.
Owner:HRL LAB

Bismuth-rich metal organic framework antibacterial material and preparation method thereof

The invention discloses an antibacterial material rich in a bismuth metal organic framework and a preparation method thereof, the method comprises the following steps: adding an indole monomer and an alcohol monomer into a solvent, and then adding nitrosalicylaldehyde into the solvent to obtain a spiropyran compound; the preparation method comprises the following steps: adding humic acid into a binary solvent consisting of dioxane and butanol to obtain a mixed solution; the ratio of the mass of the humic acid to the volume of the binary solvent is (2-3): (20-40) g / ml; sequentially adding a bismuth source, 2-bromo-5-(trifluoromethyl) pyridine and 4-(trifluoromethyl) phenylboronic acid into the mixed solution to obtain a bismuth metal organic framework; and adding the spiropyran compound into the bismuth metal organic framework to obtain the antibacterial material rich in the bismuth metal organic framework. The antibacterial capability of the antibacterial material is improved.
Owner:NINGBO FOTILE KITCHEN WARE CO LTD

Composite color-changing agent, preparation method and anti-counterfeiting color-changing ink

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.
Owner:SHENZHEN RUNLONG PRINTING MATERIALS CO LTD

Purpurine-anthraquinone composite electrochromic liquid and preparation method thereof

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.
Owner:YANGZHOU JINGCAI OPTOELECTRONICS TECH CO LTD

Rare earth metal polymer with multiple stimulation responsiveness and preparation method thereof

The invention discloses a rare earth metal polymer with multiple stimulation responsiveness and a preparation method thereof, two monomers SP and VTPY are mixed with methyl methacrylate (MMA) according to a certain proportion, a polymer skeleton Poly (VTPY-co-SP-co-MMA) is prepared through a free radical polymerization reaction, the polymer and Tb (Com) 3.2 H2O are further subjected to a coordination reaction according to a specific proportion, and the rare earth metal polymer with multiple stimulation responsiveness is obtained. The Poly-Tb (Coum) 3 with the stimuli-responsive discoloration characteristic is prepared by the aid of the method. The rare earth metal polymer with methyl methacrylate as a framework and rare earth terbium ions and spiropyran monomers as double emission centers is synthesized, has multiple stimulation response characteristics, provides a brand new strategy and possibility for development of rare earth-based multifunctional intelligent materials, and has wide application prospects. An innovative solution is provided for development of a thermal enhanced rare earth luminescent material, the thermosensitive fluorescence response performance of the material is greatly improved, and a new thought is provided for design of an intelligent temperature response type rare earth luminescent material.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Mechanical force-induced fluorescent discoloration sensor material as well as preparation method and application thereof

The invention discloses a mechanical force-induced fluorescence discoloration sensor material as well as a preparation method and application thereof, and relates to the technical field of organic synthesis and fine chemical engineering. The preparation method comprises the following steps: step 1, carrying out heating reaction on 4-(1, 2, 2-triphenyl vinyl) benzaldehyde, 3-(2, 2-dicyano-1-(3, 4-diaminophenyl) vinyl) benzene-1-yl and a catalyst to prepare a compound 1-1; and 2, carrying out heating reaction on the obtained compound 1-1 and methyl iodide under the action of alkali and a solvent, and analyzing and purifying to obtain a compound 1-2. The compound disclosed by the invention is low in preparation cost, simple and convenient to operate and simple in method, the compound shows the material characteristic of mechanical force-induced fluorescence discoloration and can be applied to the fields of sensors, dyes, anti-counterfeiting and the like, and meanwhile, the synthesis method can be used for synthesis in the fields of fine organic chemical engineering such as luminescent materials, printing and dyeing technologies and the like.
Owner:SHANTOU VOCATIONAL & TECH COLLEGE +1

Eutectic material based on organic macrocyclic aromatic hydrocarbon as well as preparation method and application of eutectic material

The invention is applicable to the technical field of eutectic materials, and provides an organic macrocyclic aromatic hydrocarbon-based eutectic material and a preparation method and application thereof, the eutectic material is a metastable material EtLP6-F4TCNQ alpha, and is prepared by taking oblique tower aromatic hydrocarbon as a subject and electron-deficient 2, 3, 5, 6-tetrafluoro-7, 7, 8, 8-tetracyanodimethyl p-benzoquinone as an object, and carrying out co-crystallization on the oblique tower aromatic hydrocarbon and the 2, 3, 5, 6-tetrafluoro-7, 7, 8, 8-tetracyanodimethyl p-benzoquinone to obtain the organic macrocyclic aromatic hydrocarbon-based eutectic material. And carrying out mechanical grinding on 2, 3, 4, 5, 6, 8-tetracyanodimethyl p-benzoquinone. According to the method, two or more organic molecules are directly mixed and induced to form the eutectic structure through simple mechanical grinding operation, the method is efficient, low in cost and easy for large-scale production, the eutectic material with the metastable structure is prepared, and the metastable structure shows higher sensitivity and faster response speed in gasochromic detection.
Owner:JILIN UNIVERSITY

Nonlinear Optical Chromophores Containing Spirofluorene-Isophorone Bridging Groups, and Methods of Making and Using the Same

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores containing spirofluorene-isophorone bridging groups, including (2) compositions / materials / resistive layers comprising NLO chromophores containing spirofluorene-isophorone bridging groups, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores containing spirofluorene-isophorone bridging groups (e.g., methods of poling and / or drying, and the like), (3) uses of NLO chromophores containing spirofluorene-isophorone bridging groups in electro-optic devices (e.g., EOMs).
Owner:LIGHTWAVE LOGIC INC

A mechanochromic material containing rhodamine with hydantoin structure and its preparation method and application

The present invention belongs to the technical field of mechanochromic materials, and specifically relates to a mechanochromic material containing rhodamine with a hydantoin structure, and its preparation method and application. The rhodamine mechanochromic material containing a hydantoin structure is shown in structure (I), with rhodamine B as the matrix, reduced to rhodamine alcohol, oxidized to generate rhodamine aldehyde, and reacted with hydantoin to prepare a six-membered spirocyclic rhodamine containing a hydantoin structure. The rhodamine compound containing a hydantoin structure involved in the present invention has good ion interference resistance, exhibits photochromic properties in a dichloromethane solvent, and has the properties of mechanical stress discoloration and solvent mixing stress discoloration with high contrast and good repeatability. The solid powder of the rhodamine mechanochromic material containing a hydantoin structure has the characteristic of changing color upon grinding. After the action of mechanical force, the color of the powder changes from yellow to pink, and a reversible color change is achieved during the grinding-heating process.
Owner:LIAONING UNIVERSITY

Integrated photochromic casting ceramic backboard material and preparation method thereof

The invention relates to the technical field of ceramic back plates, in particular to an integrated photochromic casting ceramic back plate material and a preparation method thereof. The chemical formula of the ceramic backboard material is BaMgSiO4EuxFey, wherein 0 lt; x is less than or equal to 0.01, 0lt; and y < = 0.01. The rare earth element Eu and the transition metal element Fe are cooperatively doped, so that the color change contrast ratio and the hardness of the ceramic are remarkably improved; x and y meet the following requirements: 0.002 lt; x is less than or equal to 0.008, 0.002 lt; y is less than or equal to 0.008, so that the color-changing contrast ratio and the hardness of the ceramic back plate material can be further improved, the color-changing contrast ratio is more than 90%, and the Vickers hardness is more than 600Hv; the response time of the ceramic backboard material is prolonged to be less than 8 s, the color change fatigue resistance is high, the chemical stability is good, and the structure supporting and photochromic functions are achieved.
Owner:INNER MONGOLIA UNIV OF SCI & TECH +1

Fluorene derivative as well as preparation method and application thereof

The invention belongs to the technical field of stimuli-responsive materials, and particularly relates to a fluorene derivative as well as a preparation method and application thereof. The structural formula of the fluorene derivative is as shown in formula I. The fluorene derivative disclosed by the invention has a high-contrast three-color force-induced fluorescence discoloration property. The fluorescent powder has a green fluorescence emission characteristic under a room temperature condition, and the color of the fluorescent powder can be obviously changed when the fluorescent powder is subjected to different degrees of mechanical force. Specifically, after slight grinding treatment, the color of the fluorene derivative is changed from green to yellow, and the fluorene derivative emits light; and the heavy grinding operation is continued, the color is further converted from yellow to red to emit light, and the color can be recovered to the initial green under the fumigation of dichloromethane gas, so that the high-contrast three-color force-induced fluorescence discoloration is realized. Due to the unique property, the fluorene derivative has a wide application prospect in the fields of information encryption anti-counterfeiting technology, high-precision sensors, intelligent display equipment and the like. # imgabs0 #
Owner:JIANGXI SCI & TECH NORMAL UNIV

A thermochromic microcapsule coated with a silica hybrid modified epoxy resin wall material and a preparation method thereof

The present invention relates to thermochromic microcapsules coated with a silica hybrid-modified epoxy resin wall material. The microcapsules are composed of a silica hybrid-modified epoxy resin wall material, which is a coating layer obtained by in-situ hybridization of a silicon-sourced epoxy resin with a polyamine curing agent, and a core material comprising a thermochromic material, a color developer, and a temperature-regulating solvent. The microcapsules are prepared quickly and simply, and the resulting thermochromic microcapsules have excellent thermal stability and are completely free of health-damaging aldehydes. The microcapsule wall material has high density and excellent mechanical properties, maintaining the integrity and elasticity of the capsule under external impact. Furthermore, the capsule wall has excellent light transmittance, resulting in a more vibrant color for the microcapsules.
Owner:WUHAN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

Underwater color-changing hydrogel with multi-layer structure as well as preparation method and application of underwater color-changing hydrogel

The invention discloses underwater color-changing hydrogel with a multi-layer structure and a preparation method and application thereof, and belongs to the field of polymer functional materials, the color-changing hydrogel with the multi-layer structure comprises UCST type fluorescent hydrogel, LCST type fluorescent hydrogel and an electric heating control layer; the polymerization temperature of the UCST type fluorescent hydrogel is 40-80 DEG C, and the polymerization temperature of the LCST type fluorescent hydrogel is 5-25 DEG C; the electric heating control layer comprises an electric heating layer and a packaging layer, and the electric heating layer comprises an electric heating material and an electrode. Under the power-on condition, the color-changing hydrogel can achieve a wide color-changing range and a high response speed underwater, has good stability and recovers to the original shape under the power-off condition. The preparation method provided by the invention does not need complex molecular design, can realize remote color change control by cooperating with the phase change behavior of the temperature-sensitive hydrogel and fluorescent molecules, and can be widely applied to the fields of flexible wearable devices, underwater display and the like.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI

Imidazo [1, 2-alpha] pyridine stimuli-responsive molecule with D-A twisted structure as well as preparation method and application of imidazo [1, 2-alpha] pyridine stimuli-responsive molecule

The invention provides an imidazo [1, 2-alpha] pyridine stimuli-responsive molecule with a D-A twisted structure as well as a preparation method and application of the imidazo [1, 2-alpha] pyridine stimuli-responsive molecule, belongs to the technical field of intelligent materials, and is used for solving the technical problem that intelligent materials for developing stimuli-responsive molecules for data encryption and information anti-counterfeiting are insufficient. The preparation method of the compounds N1 and N3 comprises the following steps: 2-aminopyridine and 2, 4 '-dibromoacetophenone are subjected to an amphiphilic reaction to obtain a compound a; the compound a and POCl3 are subjected to a Vilsmeier-Haack reaction, and a compound b is obtained; carrying out Suzuki coupling reaction on the compound a or the compound b and triphenylamine boric acid to obtain a compound N1 or N2; the compound N2 and malononitrile are subjected to a Knovenagel condensation reaction, and a compound N3 is obtained. The compound prepared in the invention has good fluorescence emission capability in a solution and a solid state and a grinding solvent acid / alkali stimulated fluorescence discoloration behavior, and can realize good data encryption and information anti-counterfeiting.
Owner:ZHENGZHOU UNIV

Thermochromic sustained-release microcapsule as well as preparation method and application thereof

The invention relates to the technical field of sustained-release microcapsules, and particularly discloses a thermochromic sustained-release microcapsule as well as a preparation method and application thereof. A capsule core of the microcapsule comprises perfume and a thermochromic composite material, a capsule wall is of a double-layer structure, the inner capsule wall is a porous silicon dioxide layer, and the outer capsule wall is a polyurethane layer formed by xylooligosaccharide and isocyanate; the thermochromic composite material is a reversible thermochromic compound comprising a color former, a color developing agent and a solid solvent. According to the invention, a porous silicon dioxide inner shell layer is prepared by a sol-gel method, polyurethane formed by xylooligosaccharide and isocyanate through nucleophilic addition reaction is taken as an outer shell layer, and through the combined action of a double-layer capsule wall structure, the functions of thermochromism and perfume slow release are continuously exerted. In addition, xylooligosaccharide serving as one of raw materials of the outer capsule wall is wide in source, green and environmentally friendly, the biocompatibility of the microcapsule can be effectively improved, and the xylooligosaccharide microcapsule has very important significance in expanding the application field of the microcapsule.
Owner:KAILUAN (GROUP) CO LTD +1

And Napos; 1, Napos; 3, the Napos is selected; application of 5-tri ((E)-4-(diphenylamino) benzylidene) benzene-1, 3, 5-tricarbohydrazide as piezo-chromic material

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.
Owner:GUANGDONG INST OF ARTS & SCI

Method for extracting lignin from lignocellulose

The invention discloses a method for extracting lignin from lignocellulose. The method comprises the following steps: 1) cleaning and drying straws, crushing and sieving to obtain a lignocellulose raw material; 2) adding the lignocellulose raw material into a hydrogen peroxide aqueous solution, soaking for 1-2 hours, adding ethylenediamine, and reacting for 1 hour at 25 DEG C or 120 DEG C to obtain a reactant; (3) washing each gram of reactants with deionized water, and carrying out solid-liquid separation to obtain solids and washing liquid; and adding absolute ethyl alcohol into the water washing liquid, generating a precipitate, centrifuging, taking a liquid part, carrying out rotary evaporation and freeze drying to obtain lignin, and storing at-20 DEG C. Lignin obtained through the first method is low in molecular weight and more uniform in lignin chain length, more nitrogen-containing functional groups are grafted in lignin, and lignin obtained through the second method is high in fluorescence intensity and becomes an ideal raw material for manufacturing fluorescent materials.
Owner:TIANJIN UNIV

Electrochromic compounds switchable blane-transparent states

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.
Owner:ZHEJIANG UNIV OF TECH

Novel organic photochromic functional material and preparation method thereof

The invention relates to the technical field of photochromic functional materials, in particular to a novel organic photochromic functional material and a preparation method thereof. The method comprises the following steps: S1, mixing a fluorane dye A with a molecular formula (1) and an alcohol protonation solvent B according to a volume ratio of 1: (1-5); s2, carrying out solvothermal reaction on the mixed solution at 150-200 DEG C to obtain a reactant, and collecting a precipitate; and S3, drying the precipitate in the step S2 to obtain the organic photochromic functional material. The novel organic photochromic functional material is simple in preparation process and green, and is yellow in darkness or a fluorescent lamp; under an ultraviolet lamp, the color is bright orange, and the yellow color and the bright orange color are reversibly interchanged.
Owner:CENT SOUTH UNIV

Photochromic articles and glasses

To provide a photochromic composition that gives a photochromic article having a high coloring density when coloring in the visible range, and to provide a photochromic article.SOLUTION: A photochromic composition comprises three photochromic compounds each having a specific fused structure of benzo[h]chromene and indene, two of them having electron-donating substituents.SELECTED DRAWING: None
Owner:HOYA LENS THAILAND LTD

Preparation method of cellulose-based water-induced deformation and color-changing film

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.
Owner:CHINA NAT PULP & PAPER RES INST CO LTD

Tungsten oxide material, tungsten oxide powder mass for electrochromic device, and slurry for producing electrochromic device

According to one embodiment, a tungsten oxide material containing potassium is provided. The tungsten oxide material has a shape of particles including a central section and a peripheral section adjacent to the central section, and having an average particle size of 100 nm or less. A periodicity of a crystal varies between the central section and the peripheral section. In addition, a tungsten oxide powder mass for an electrochromic device including 80% by mass to 100% by mass of the tungsten oxide material is provided. Moreover, a slurry for producing an electrochromic device containing the above tungsten oxide material is provided.
Owner:NITERRA MATERIALS CO LTD

Tungsten oxide powder and electrochromic device using the same

According to one embodiment, provided is a tungsten oxide powder including primary particles having an average particle size of 100 nm or less. Each of the primary particles include a crystal phase and an amorphous phase coexisting in each primary particle.
Owner:NITERRA MATERIALS CO LTD

Electrolyte and additive for controlling morphology and optics of reversible metal films

Dynamic windows with adjustable tint give users greater control over flow of light and heat. Reversible metal electrodeposition dynamic windows include (i) a transparent or translucent conductive electrode; (ii) an electrolyte solution in contact with the electrode, the electrolyte solution comprising metal cations that are reversibly electrodeposited onto the transparent electrode upon application of a cathodic potential; and (iii) a counter electrode. The electrolyte solution advantageously includes a small amount of an additive (e.g., an inhibitor, an accelerator, a leveler, or an organic or inorganic molecule that similarly serves to enhance the surface morphology of the metal cations during reversible metal electrodeposition onto the transparent electrode). Such enhancement of surface morphology during the reversible electrodeposition of the metal tinting layer over the electrode enhances one or more of color neutrality, transmittance characteristics of visible wavelengths (e.g., ability to achieve a near 0% transmission privacy state), infrared reflectance, or switching speed.
Owner:THE REGENTS OF THE UNIVERSITY OF COLORADO +1

Crystal compound, preparation method thereof and application of crystal compound in X-ray detection, imaging and anti-counterfeiting encryption

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.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI +1