667 results about "Fluorescent materials" patented technology

The invention discloses a fluorescent covalent organic framework material for hydrogen sulfide detection as well as a preparation method and application thereof, relates to a covalent organic framework material as well as a preparation method and application thereof, and aims to solve the technical problems that an existing porous material for H2S detection is few in structure type, unstable in COFs (Covalent Organic Frameworks) structure, high in detection limit and harsh in detection environment. The periodic structure fragment of the fluorescent covalent organic framework material for hydrogen sulfide detection is shown in the specification. 3-(5, 10-diamino-1H-phenanthrene) [9, 10-d] imidazole-2-yl) phenol and 2, 4, 6-tri (4-formylphenoxy)-1, 3, 5-triazine are subjected to a reaction to obtain a hydroxyl intermediate, the hydroxyl intermediate is modified with 2, 4-dinitrofluorobenzene, and the fluorescent material is used for qualitative detection of H2S. The method is not interfered by amino acids and anions in the environment, and is not influenced by an acid-base environment. The method can be used in the field of H2S detection.

The invention discloses a building ceramic tile with a fluorescent magical color effect and a preparation method of the building ceramic tile, and relates to the technical field of building ceramic tiles. The ceramic tile sequentially comprises a green body layer, a cover glaze layer, a pattern layer, a fluorescent material layer and a transparent color-emitting glaze layer from bottom to top, the pattern layer is formed by printing a multi-layer multicolor pattern file on the cover glaze layer by using a digital ink jet machine; according to the fluorescent material layer, after patterns are printed in an ink-jet mode, a printing machine is used for accurately aligning designed marking positions, the patterns printed by an ink jet printer and the fluorescent material layers with different colors are positioned and overlapped, it is ensured that the patterns of the fluorescent material layer and the colorful patterns printed by the digital ink jet printer are completely matched and overlapped, and the multi-layer colorful effect of the brick surface is achieved. According to the invention, a fluorescent material is introduced, a novel transparent color-developing protective glaze is researched and developed, and a proper firing process is combined, so that the brick surface can show a magical color effect in both bright and dark places.

The application belongs to the technical field of fluorescent material synthesis, and particularly relates to a blue fluorescent powder with self-activation effect and a preparation method thereof, the chemical formula of the blue fluorescent powder is Li2Mg2W2O9 or Li2Zn2W2O9; the preparation comprises the following steps: 1) according to the chemical proportion of the fluorescent powder, magnesium / zinc source, lithium source and tungsten source are weighed and uniformly ground; 2) the uniformly ground mixed powder is placed into an alumina crucible, sintering is carried out, and the product is fully reacted after heat preservation for a period of time; 3) the product is uniformly ground again after cooling, and the blue fluorescent powder with self-activation effect is obtained. The application utilizes the special lattice structure of the substrate, and obtains the blue fluorescent powder with self-activation effect under an air atmosphere; the generated product has high purity, simple synthesis conditions, low cost and is easy to be prepared on a large scale; the prepared fluorescent powder has a high internal quantum efficiency of 68.7%, high luminous intensity and unique blue light emission characteristics.

The invention relates to the technical field of organic synthesis and the technical field of fluorescent materials, in particular to a boron coordination salicylhydrazone double-state emission fluorophore as well as a preparation method and application of the boron coordination salicylhydrazone double-state emission fluorophore. The structure of the boron coordination salicylazone double-state emission fluorophore is shown as I, II or III; wherein R1 is selected from one of H, halogen atoms, diethylamino and thienyl, R2 is selected from one of H, halogen atoms, diethylamino and thienyl, and R3 is selected from one of aryl, 9, 9 '-spirobifluorenyl, alkoxy and halogen atoms. The boron coordination salicylazone double-state emission fluorophore is diversified in structure and good in solubility, has excellent photophysical properties and extremely high quantum yield, and also shows excellent biocompatibility and remarkable liposome targeting property at the same time. Moreover, the preparation method of the boron-coordinated salicylazone double-state emission fluorophore adopts a one-pot two-step method, is simple and convenient, is high in yield, is green and environment-friendly, and has a wide application prospect.

The invention relates to a preparation method of a terbium-doped gadolinium oxysulfide fluorescent material. The performance of the material is remarkably improved through an optimized high-temperature solid-phase method. According to the process, firstly, polyvinylpyrrolidone (PVP) and dopamine hydrochloride are used as a dispersing agent and a coating agent to prepare uniformly dispersed Gd2O3 and Tb4O7 oxide precursors, then through a fluxing agent system with the synergistic effect of boric acid and lithium carbonate and in combination with a low-temperature pre-sintering-medium-temperature vulcanization-high-temperature crystallization three-stage sintering process, grain aggregation and abnormal growth are effectively inhibited, and the Gd2O3 / Tb4O7 composite material is obtained. And finally, annealing in air to remove carbon impurities to obtain the superfine fluorescent powder with small particle size and narrow distribution. Experiments show that the particle size D50 of the fluorescent powder in the embodiment is 496-678 nm, the fluorescence decay life exceeds 1100 microseconds, the luminous intensity is high, the stability is excellent, and the fluorescent powder has wide application prospects in the fields of liquid crystal display, biomedicine and the like.

A light-emitting element includes an anode, a cathode, and an electroluminescent layer between the anode and the cathode. The electroluminescent layer includes an emission layer containing a host material and a first fluorescent material. A bandgap of the host material is equal to or greater than 3.0 eV and equal to or less than 3.4 eV. A difference in a level of a lowest unoccupied molecular orbital between the host material and the first fluorescent material is equal to or greater than 1.0 eV. A difference in a level of a highest occupied molecular orbital between the host material and the first fluorescent material is equal to or less than 0.3 eV

A water quality analysis system is calibrated without using any organic fluorescence material such as phenanthrene. The water quality analysis system analyzes a component to be measured contained in a liquid sample by a fluorescence spectroscopy, and that comprises a light irradiation section that irradiates the liquid sample with a light having an excitation wavelength of the component to be measured, a light detection section that detects a fluorescence of the component to be measured emitted from the liquid sample, a calculation unit that calculates a concentration of the component to be measured by using a fluorescence intensity obtained by the light detection section, and a solid fluorescence reference member that is arranged on an optical path between the light irradiation section and the light detection section and that emits the fluorescence by the light from the light irradiation section at a time of calibration.

The embodiment of the invention discloses a detection system and method for a battery cell clamping needle, and the detection system comprises a camera and a visual upper computer. The camera is used for collecting a to-be-detected image; the to-be-detected image is an image imaged on the triangular prism after the light source lights the end face of the cell clamping needle plated with the fluorescent material and the end face of the standard block; the visual upper computer is used for acquiring a to-be-detected image acquired by the camera on the detection station; and performing defect detection on the to-be-detected image to obtain a detection result of the to-be-detected image, and sending the detection result to the controller. According to the embodiment of the invention, the light source is used for lighting the end face of the cell clamp needle and the end face of the standard block which are plated with the fluorescent material, the camera is used for collecting images of the end face of the cell clamp needle and the end face of the standard block on the triangular prism, and the fluorescent material can enhance the contrast, so that details of the end face of the cell clamp are more easily captured; therefore, the definition and accuracy of the to-be-detected image are improved.

The present invention relates to the technical field of the preparation of Cr3+-doped fluorescent materials. Disclosed are the preparation of a Cr3+-doped fluorescent material and the use thereof in a plant light supplement lamp. The preparation comprises the following steps: weighing a matrix raw material and a Cr3+-containing raw material according to the stoichiometric ratio, and respectively grinding and then storing same in a dryer; placing the raw materials into a ball milling tank, and subjecting same to planetary ball milling for 3-6 hours; transferring same to an alumina crucible, and pre-sintering same for 2-5 hours; after secondary ball milling, adding a fluxing agent thereto; placing same in a high-temperature furnace and sintering same for 6-10 hours, and furnace cooling same or cooling same under the protection of an inert gas; and firstly coarsely crushing same, then grinding same to 10-30 μm, alternately cleaning same with deionized water and ethanol, drying same in an air dry oven, detecting and screening the product by using a fluorescence spectrophotometer, an X-ray diffractometer and a scanning electron microscope, and remanufacturing unqualified products after adjusting process parameters according to detection results. The present invention has a high light-emitting efficiency, and the spectrum thereof is suitable for plant photosynthetic absorption. When being applied to a light-supplementing lamp, plant growth can be promoted, the plant height and the chlorophyll content are significantly increased, and the natural spectrum is simulated, such that the material is suitable for multiple cultivation scenarios.

The invention belongs to the technical field of organic electroluminescence, and particularly relates to a boron nitrogen-phosphorus oxygen skeleton fused series compound and an organic electroluminescence device.A phosphorus oxygen unit is introduced into a boron / nitrogen type multiple resonance thermal activation delayed fluorescence skeleton through a one-step phosphorus oxygen post-modification method, metal does not need to participate in the synthesis route, the yield is high, and the method is suitable for industrial production. A universal strategy is provided for expanding the structural diversity of an MR-TADF system, the provided multi-resonance type thermally activated delayed fluorescent material containing fusion of the boron, nitrogen and phosphorus oxygen frameworks has the characteristic of wide color gamut emission, and an organic electroluminescent device prepared by using the material as a luminescent material realizes wide color gamut and narrow spectrum TADF emission and has wide application prospects. And the electroluminescent device has relatively low efficiency roll-off, and is an organic luminescent functional material with good performance.

The invention discloses a fluorescent dye for shoe soles as well as a preparation method and application of the fluorescent dye, and belongs to the technical field of fluorescent materials for shoes. The fluorescent dye has a structure as shown in a formula 1. The preparation method comprises the following steps: synthesizing an intermediate through Buchwald-Hartwisting arylation reaction, and carrying out Suzuki coupling to obtain a target product. The dye inhibits aggregation fluorescence quenching through a rigid plane structure and a deuterated group, the HOMO-LUMO energy gap is regulated to 2.8-3.2 eV, the dye has the broad band emission of 450-600 nm, and the fluorescence quantum efficiency reaches 0.55-0.75. When the brominated butyl rubber is applied to a sole formula, the brominated butyl rubber comprises the following components in parts by weight: 40-60 parts of brominated butyl rubber, 0.1-2 parts of fluorescent dye and the like, and a finished product is prepared by mixing, vulcanizing and foaming. Compared with a traditional dye, the fluorescence intensity is improved, the photooxidation resistance is enhanced, the dissolution rate is reduced by 60% or above, and the dye has excellent humidity and heat resistance and material compatibility.

The invention provides fluorescent carbon dots and fluorescent hydrogel based on solvent stimulation response discoloration and a preparation method and application of the fluorescent carbon dots and the fluorescent hydrogel, and belongs to the technical field of fluorescent materials and information encryption. The preparation method of the fluorescent carbon dots comprises the following steps: mixing a biomass carbon source and a solvent, and performing solvothermal reaction to obtain the fluorescent carbon dots, the biomass carbon source comprises one or more of buxus buxus, oriental cherry leaves, fructus forsythiae leaves and oak leaves; the solvent is ethanol. The biomass carbon dots are low in toxicity, excellent in optical stability and photobleaching resistance and high in ionic strength; the fluorescent carbon dots have double emission peaks of red light and blue light / green light, are different from single fluorescent carbon dots, and can provide more fluorescent information storage density for a fluorescent gel-based information orientation encryption system. The fluorescent color of the fluorescent hydrogel can be stably switched in an ethanol / water solvent, the gel structure is stable, the information storage capacity is improved, and a fluorescent hydrogel-based information anti-counterfeiting encryption system is promoted to develop towards multiple dimensions.

The invention discloses a valve rubber sealing ring with a fluorescent function and a preparation method, the valve rubber sealing ring is prepared from a vulcanizing agent, an accelerant, a rubber base material and a fluorescent material, and the adding proportion of the fluorescent material is 15-20% of the mass of the rubber base material. Through special fluorescent materials and structural design, the identifiability and individuation of the valve core assembly are optimized, and through material and process innovation, the technical blank of dark environment identification and individuation design of the valve core assembly in the traditional technology is filled up. The valve core rubber sealing ring can meet the special requirements of users for product differentiation and attractiveness, and collaborative optimization of the fluorescence function and the sealing performance is achieved. The rubber base material and the fluorescent material are selected to be matched, the adding proportion of the fluorescent material is controlled to be 15%-20% of the mass of the rubber base material, and it is ensured that the sealing performance and the wear resistance of the rubber composite fluorescent material reach the standard while fluorescent display is achieved.

A method and a system have been developed to calibrate the total spectral radiance factor (TSRF) obtained from different instruments. A broad-band light source covering the whole visible range as well as the fluorescence excitation wavelengths is used to measure the TSRF, and one or more narrow-band light sources outside of the fluorescent band is used to measure fluorescent spectral radiance factor (FSRF) separately. After that, the TSRF is adjusted by the FSRF, and a calibrated TSRF can be obtained. This can be applied to characterize Optical Brightening Agents (OBAs) as well as other fluorescent materials without requiring any moving part of the instrument to do the calibration.

The invention discloses a graph pattern generation method based on a Clarii graph, and relates to the technical field of information, and the method comprises the steps: constructing an extended fluorescent material calibration module, introducing a saturation critical light intensity reference value, and carrying out the calibration of the Clarii graph under the dual constraints of color temperature deviation distribution and brightness standard deviation; according to the method, the pattern contrast change condition is recognized through the adjusted pattern contrast, a correction index is formed, the LED backlight wavelength is corrected for the second time according to the correction index, pattern structure deviation information is fed back to a spectrum control link, and the color uniformity of the LED backlight is improved. According to the scheme, on the premise of ensuring uniform fluorescence response and inhibiting bright spots, dark spots and stripes, the Clariy pattern can be kept stable, clear and layered in an actual application environment.

The invention discloses an acridine-derived thermally activated delayed fluorescent material and an electroluminescent device thereof, and belongs to the technical field of organic luminescent materials. According to the fluorescent material, any electron withdrawing group is used as a receptor, an acridine derivative is used as a donor, nitrogen atoms of the acridine derivative are directly connected with the receptor, a dihedral angle between an electron donor and the electron receptor is increased, the dihedral angle is kept at an angle close to 90 degrees, meanwhile, the large-rigidity donor structure further reduces intramolecular vibration relaxation, and the fluorescence intensity is improved. In addition, HOMO delocalization can be further realized through side conjugation modification of acridine, so that large antiintersystem crossing rate and radiation decay rate are realized, the luminescence property of molecules is further improved, and the efficiency roll-off is reduced. The material provided by the invention can be used as an active material to be applied to organic electroluminescent devices.

The invention discloses a high-flexibility bio-based polyurethane fluorescent material capable of being self-repaired at room temperature and a preparation method of the high-flexibility bio-based polyurethane fluorescent material, and belongs to the technical field of polyurethane materials. The preparation method comprises the following steps: generating a prepolymer from diisocyanate and polypropylene carbonate glycol under the action of a catalyst; carrying out chain extension reaction by taking dimethylglyoxime as a chain extender to generate a polyurethane material PUDMG containing ketoxime bonds; after PUDMG is dissolved, the PUDMG and a mixture of terbium nitrate hexahydrate and europium nitrate hexahydrate are subjected to a coordination reaction, and finally a target product is prepared. By introducing a dimethylglyoxime chain extender, a dynamic ketoxime bond is constructed in a polymer network, and the room-temperature efficient self-repairing of the material is realized; meanwhile, dimethylglyoxime provides effective coordination sites for Tb < 3 + > and Eu < 3 + >, and the dimethylglyoxime, the Tb < 3 + > and the Eu < 3 + > have a synergistic effect, so that the material is endowed with strong fluorescence performance, and meanwhile, the mechanical property and the self-repairing efficiency are further enhanced. The material is simple in preparation method and has a wide application prospect in the fields of flexible electronic devices and anti-counterfeiting.

The invention discloses nitrogen-doped carbon quantum dots derived from American cockroach dregs as well as a preparation method and application of the nitrogen-doped carbon quantum dots, and belongs to the technical field of nitrogen-doped carbon quantum dots. The nitrogen-doped carbon quantum dots are prepared from the American cockroach dregs by a one-step hydrothermal method, optimal synthesis parameters are obtained through experimental optimization of synthesis conditions, and the prepared nitrogen-doped carbon quantum dots have excellent optical characteristics and stability; the invention also provides an application of the nitrogen-doped carbon quantum dot in Ag < + > detection, the nitrogen-doped carbon quantum dot has good selectivity, sensitivity and anti-interference performance on Ag < + >, a detection mechanism is an internal filtering effect and light-induced electron transfer, and the nitrogen-doped carbon quantum dot can be used as a preferred fluorescent material of an Ag < + > fluorescent sensor. The nitrogen-doped carbon quantum dots synthesized by the method not only have an Ag < + > sensing function, but also realize high-valued utilization of medicine residues, and also provide a new thought for self-doping of heteroatoms.

The invention relates to the technical field of adhesive tape defect detection, in particular to a multi-parameter-based automobile adhesive tape detection system and method.The automobile adhesive tape detection system is provided with an identification adding module, an acquisition module, a pre-analysis module, a defect classification module and a positioning detection module, and the surface of an adhesive tape is coated with a fluorescent material through the identification adding module; the method comprises the following steps: detecting the fluorescence intensity value of a rubber strip to form a plurality of groups of fluorescence identifiers, stretching the rubber strip in the axial direction through a stretching unit, acquiring local extension characterization quantity of each group of fluorescence identifiers through a pre-analysis module to determine a suspected defect interval section, and determining the expression category of the suspected defect interval section according to the change condition of the fluorescence intensity value through a defect classification module. And the positioning detection module is used for positioning the defect position of the adhesive tape. Furthermore, the defect type is accurately identified through multi-parameter collaborative analysis, the detection strategy is dynamically adjusted according to the defect type, and the requirement for high-quality detection of the adhesive tape for the automobile is met.

The invention relates to a purple light-excited cyan light-emitting fluorescent material as well as a preparation method and application thereof. The cyan light emitting fluorescent material is a Ce < 3 + > doped oxide cyan light emitting fluorescent material, the chemical expression of the cyan light emitting fluorescent material is SrCa0. 7Mg0. 3Lu4-xO8: xCe < 3 + >, and x is more than or equal to 0.003 and less than or equal to 0.05. The preparation method comprises the following steps: weighing a strontium source compound, a calcium source compound, a magnesium source compound, a lutetium source compound and a cerium source compound according to a stoichiometric ratio of a chemical expression of the green light emitting fluorescent material, grinding and uniformly mixing to obtain a mixture; sintering the mixture at high temperature, and cooling to obtain the purple light excited cyan fluorescent material. Compared with the prior art, the method has the advantages of optimizing the crystal field environment, constructing a cyan fluorescent material with wide-spectrum excitation characteristic, high luminous efficiency and excellent thermal stability and the like.

The present application relates to fluorescent material technical field, especially based on benzopentacyclic / septacyclic structure's carbonyl nitrogen type fluorescent material and its preparation method, the present application provides the preparation method with carbazole as raw material, in the synthesis process, the aldehyde group precursor is directly oxidized to acid by using strong oxidant, then the intermediate is made to occur intramolecular Friedel-Crafts reaction by acid catalyst, finally the carbonyl / nitrogen type fluorescent material of inlaid non-benzene structure is synthesized.This structure inhibits molecular relaxation through multiple resonance effect, and then realizes narrow band emission characteristics.At the same time, the structure retains higher photoluminescence quantum yield.The carbonyl nitrogen type fluorescent material based on benzopentacyclic / septacyclic structure provided by the present application is different from the existing all benzene type polycyclic aromatic hydrocarbons, so as to effectively widen the molecular system of carbonyl / nitrogen type narrow band light emitting material.

The application belongs to the field of photoelectric functional materials, and discloses a blue light excitable Cu-based fluorescent material and a preparation method thereof. The material is obtained by room temperature reaction of 4-pytrz and halogenated cuprous CuX (X=Br, I), wherein 4-pytrz is 4-(4H-1,2,4-triazole-4-yl)pyridine. Two highly stable coordination polymers, complex 1 [CuBr(4-pytrz)2] n and complex 2 [Cu2I2(4-pytrz)] n are designed and synthesized, which have good thermal stability, exhibit a wide excitation band covering from deep ultraviolet light to blue light region, and have a quantum efficiency of 19.36% under blue light excitation. The complexes exhibit effective solid-state emission and enhanced light stability, and have wide application prospects.

The invention discloses a preparation method of traceable polyester staple fibers, which comprises the following steps: mixing a tracing raw material and a renewable synthetic fiber raw material, and carrying out melt spinning to obtain the traceable regenerated polyester staple fibers, the tracing raw material comprising at least two of cobalt Prussian blue analogues, germanate fluorescent materials and metal oxides. The invention also provides a traceable polyester staple fiber product prepared by the preparation method. According to the method, two color changes under thermal stimulation and solvent stimulation of primary-color polyester fibers can be achieved, meanwhile, the tracing germanate fluorescent particles and the metal oxide tracing particles are added to make up for the defect that color changes are difficult to recognize after the fibers are dyed, and meanwhile the tracing means is complicated, so that the fibers are difficult to counterfeit.

The application discloses a blue fluorescent molecule, which has a D-pi-A structure, contains an oxadiazole as an acceptor group and a phenyl carbazole as a donor group, and connects the acceptor group and the donor group with an aromatic ring having a thermal excitation energy level arrangement characteristic as a pi bridge. The application also provides a preparation method and application of the blue fluorescent molecule. The application uses the aromatic ring having the thermal excitation energy level arrangement characteristic as the pi bridge, reasonably regulates a high-energy excited state of the acceptor by introducing the donor, activates a thermal excitation channel of the molecule, breaks through a limitation of 25% of an excitation utilization rate of a fluorescent material, and thus improves the excitation utilization rate.

This invention discloses a method, system, and fluorescent mixed-spray device for detecting and evaluating inclined roadways in open-pit mines. The method includes: performing fluorescent material spraying and optical observation in at least two boreholes along the target exploration line; determining the spatial connectivity of roadway cavities between boreholes based on the observation results; acquiring roadway profile area data perpendicular to the exploration line at each borehole location for roadway sections determined to be connected; calculating a quantitative index characterizing the degree of profile morphology change based on the profile area data; and adaptively selecting a corresponding volume calculation model to calculate the volume of the roadway cavity based on a comparison of the quantitative index with a preset threshold. This invention combines rapid qualitative assessment of spatial connectivity based on fluorescence with accurate adaptive volume calculation based on morphological variation coefficients, using a single integrated technical process to simultaneously solve the problems of high exploration costs and low calculation accuracy in traditional methods.

The invention provides a light conversion adhesive film containing a thermally activated delayed fluorescent material for sunlight wavelength conversion and a preparation method thereof, the light conversion adhesive film comprises a compound of formula I and a substrate transparent to visible light, the definition of each group in the formula I is described in the specification, and the mass fraction of the compound of formula I in the light conversion adhesive film is 0.001%-3%. The light conversion adhesive film can be used for a solar cell so as to enhance the efficiency and the stability of the cell.

A fastener has enhanced visibility by a fluorescent material coating applied to recessed surfaces formed in a strike surface of the head of the fastener. The fluorescent material coating on the recessed surface is protected by the raised strike surface of the fastener from being impacted by a tool and worn or chipped from the fastener. The fluorescent material of the coating will fluoresce when exposed to ultraviolet radiation light thereby enhancing the visibility of the fastener.

The invention discloses a method and a device for preparing a D-A type thermally activated delayed fluorescent material through continuous flow. A two-section type continuous flow reaction system is adopted, wherein the first continuous flow reaction system is connected with a tubular reactor in series through a micro-channel reactor, and efficient nucleophilic substitution reaction of an electron acceptor halide and an electron donor is achieved under palladium catalysis; the second continuous flow reaction system is driven by double feeding pumps, so that a D-A type compound prepared from a precursor and nonaphenyl tertiary alcohol are subjected to Friedel-Crafts alkylation modification under the catalysis of acid, the reaction time of the two steps is greatly shortened, and the yields of the two steps are both 88% or above. Through flow rate limitation, solvent concentration, solid content and temperature-pressure cooperative control, the problems of palladium-containing catalyst slurry transmission and side reaction inhibition are solved. According to the method, continuous kilogram-level production of the TADF material is achieved, compared with a traditional process, energy consumption is reduced, intermediate separation is not needed, and a new normal form is provided for industrial preparation of the OLED material.

To provide an organic light emitting element with excellent durability, including a delayed fluorescent material in the emission layer.SOLUTION: A delayed fluorescent material with a ΔPBHT of 0.01 or more is used in the emission layer of an organic light emitting element. PBHT(T1) represents the PBHT of the lowest excited triplet state of the delayed fluorescent material and PBHT(Tn) represents the PBHT of the lowest energy excited triplet state among the excited triplet states whose energy is greater than the lowest excited singlet energy of the delayed fluorescent material. ΔPBHT=PBHT(Tn)-PBHT(T1).SELECTED DRAWING: None