70results about How to "Good luminous properties" patented technology

The invention provides a bismuth oxyhalide light-emitting material with doped rare earth ions and a preparation method of the bismuth oxyhalide light-emitting material with the doped rare earth ions. The chemical formula of the bismuth oxyhalide light-emitting material with the doped rare earth ions is Bil-x-yEuxReyOM, wherein the x is 0.001-0.5, the y is 0-0.5, the M is one or more of Cl, Br and I, and the Re is any one or more of Tb, Ce, Nd, Dy, Sm, Pr, Lu, Er, Tm, Yb, Gd, Ho and La. The preparation method of the bismuth oxyhalide light-emitting material with the doped rare earth ions comprises the steps that (1) bismuth nitrate, rare earth nitrate and halogenated potassium are weighed, and a solution is prepared; (2) thermal treatment is carried out on the obtained solution to obtain produced materials, washing is carried out, thermal treatment is carried out again, and the bismuth oxyhalide light-emitting material with the doped rare earth ions can be obtained, wherein the chemical formula of the bismuth oxyhalide light-emitting material with the doped rare earth ions is Bil-x-yEuxReyOM. The bismuth oxyhalide light-emitting material with the doped rare earth ions can effectively achieve doping, has the good light-emitting characteristic, and is high in absorption efficiency and excitation efficiency to ultraviolet light and light of the visible light waveband, simple in preparation method, easy to control, low in cost of raw materials and low in resultant temperature of the high-temperature solid state method.

A nanocrystal particle including: a semiconductor material; boron and optionally fluorine, wherein the particle has an organic ligand bound to a surface thereof, the boron is present as being doped in the particle or as a metal boride and the fluorine is present as being doped in the particle or as a metal fluoride.

The invention discloses preparation of solid fluorescent carbon dots and application thereof in an aspect of latent fingerprint detection, belongs to the technical fields of material synthesis and fingerprint detection. The solid fluorescent carbon dots are synthesized by adopting glutathione as a nitrogen/sulfur source and adopting citric acid as a carbon source by virtue of a microwave method. Raw materials are safe and easy to obtain, a preparation method is simple and rapid, and particles are safe and nontoxic. The surfaces of the solid fluorescent carbon dots (SFCDs) provided by the invention contain an amino, a sulfydryl and a carboxyl functional group, a particle size is 2 to 7 nm, and the solid fluorescence property is excellent. The SFCDs are used as a fingerprint developing agent and can develop the aged fingerprint, and the developing time can reach 30 days in an experimental range; and the solid fluorescent carbon dots can be applied to a liquid spray method and powder method, the two methods are complementary to each other, and the universality of the developing agent is improved.

The invention discloses 2-micron luminous rare-earth ion-doped germanate laser glass and a preparation method thereof. The mol percentage composition of the glass is as follows: 60 to 65 percent of GeO2, 15 to 20 percent of BaF2, 2 to 13 percent of Ga2O3, and 2 to 13 percent of Re2O3ReF3; wherein, Re is the rare-earth elements of La, Yb, Tm and Ho. The rare-earth ion doping mode of the glass is: single doping of Tm, double doping of Yb and Tm, double doping of Yb and Ho, double doping of Tm and Ho, or three doping of Yb, Tm and Ho. Rare-earth ions are introduced in the form of rare earth oxides or rare earth fluorides and can all obtain the glass with stability and excellent luminous performance. Test result shows that the germanate glass in the invention has higher transmission rate and wider transmission range. A fluorescence spectrum test shows that the germanate laser glass of the invention can obtain excellent fluorescence emitting approaching to 2-micron. The laser glass of the invention is also suitable for preparing 2-micron optical fiber perform cores.

The invention relates to a photoelectrochemical sensor, and preparation and application thereof. A preparation method for the photoelectrochemical sensor comprises the following steps: S1, pretreating ITO electro-conductive glass; S2, adding TiO2 nanoparticles onto the ITO electro-conductive glass drop by drop to prepare an ITO/TiO2 electrode; S3, soaking the electrode in a carbon quantum dot solution for 10 h so as to obtain an ITO/TiO2/CODs electrode; S4, adding chitosan onto the electrode drop by drop so as to obtain an ITO/TiO2/CODs/CS electrode; S5, adding a glutaraldehyde solution onto the electrode drop by drop; and S6, dropwise adding thrombin aptamer drops, carrying out a reaction at 4 DEG C under a wet condition for 10 to 15 h, continuing adding bovine serum albumin onto the electrode drop by drop after leaching and blow-drying, and carrying out leaching and blow-drying again. The prepared photoelectrochemical sensor can be used for detection of thrombin. According to the invention, the carbon quantum dots with a wide visible light absorption range, good luminosity and high-efficiency electron injection capability are used as a photosensitizer for titanium dioxide, so the obtained composite structure has good response to photoelectric current under visible light. The prepared photoelectrochemical sensor has the advantages of simple operation, low cost, environment friendliness, high sensitivity and good selectivity.

The invention discloses a method for preparing silicon-based oxynitride fluorescent powder, which comprises the following steps of: weighing corresponding raw materials and silica powder based on stoichiometric proportion of each element in the chemical formula of the silicon-based oxynitride fluorescent powder, after uniformly mixing the raw materials and the silica powder, raising the temperature to 800 to 1,000 DEG C under any one of the conditions of condition a to condition c, performing reduction reaction under the condition c or the condition d, and cooling the reaction product to roomtemperature to obtain the silicon-based oxynitride fluorescent powder, wherein the condition a is vacuum; the condition b is the atmosphere of inert gases; the condition c is the atmosphere of nitrogen-containing gases; and the condition d is the atmosphere of reductive gas. The silicon-based oxynitride fluorescent powder doped with various luminescent ions and prepared by the method has bright fluorescence under the excitation of ultraviolet ray, near ultraviolet or visible light. The method has the advantages of low preparation temperature of the product, high phase purity of the product, controllable particle size of the product, good luminous intensity of the product, low cost, simple process and the like, and is easy to enlarge industrialization.

An organic electroluminescent compound of formula 1 and an organic electroluminescent device comprising the same is disclosed. The organic electroluminescent compound provides an organic electroluminescent device which has high luminous efficiency and a long operation lifetime and requires a low driving voltage, to thereby have improved power efficiency and power consumption.

The invention discloses a blue light-emitting material and a preparation method thereof. The blue light-emitting material has a chemical composition expression formula of Ba1-xEuxCa2MgSi2O8, wherein Eu<2+> ( bivalent rare earth europium ion) is an active ion, and x is the molar percentage coefficient of the active ion Eu<2+> relative to alkaline earth metal ion Ba<2+> and is not less than 0.001 and not more than 0.10. According to the invention, the preparation method is simple; and the prepared novel rare earth light-emitting material can emit blue light under the excitation of ultraviolet, has stronger light intensity than traditional commercial blue fluorescent powder BaMgAl10O17:Eu<2+> (BAM), and also has relatively better luminance intensity under the vacuum ultraviolet excitation.

The invention relates to the field of inorganic chemical and particularly relates to a two-dimensional coordination polymer and a preparation method thereof. The two-dimensional coordination polymer has the chemical formula of C16H18N4CuCl, belongs to an orthorhombic crystal system, has the space group of Pnma and has the crystal cell parameters that a is equal to 6.1833(5) angstroms, b is equal to 12.9240(7) angstroms, c is equal to 19.8705(12) angstroms, alpha is equal to beta, is equal to gamma and is equal to 90 degrees, and V is equal to 1587.91(18) angstroms<3>. The coordination polymer disclosed by the invention is easy to prepare, and a synthesized material has few defects, is high in crystallinity and has an excellent luminescent property.

The invention discloses a copper (I) phosphorine heterocyclic complex and a preparation method and application thereof. The structural formula of the copper (I) phosphorine heterocyclic complex is shown in the formula I. In the formula, X represents a halogen element. The complex has good phosphorescence performances at the room temperature and 77K, lifetime of about 100 microseconds at the room temperature and lifetime of about 2 milliseconds at 77K. In a range of 77K to 297K, the lifetime of the complex has high dependence on the temperature. The lifetime of a sensor prepared from the complex has high linear dependence on the temperature. The complex has excellent sensitivity and stability and a very wide temperature response range of 77K to 337K. The invention discloses a copper (I) metal complex fluorescence temperature sensor in a visual temperature-life linear relationship. The copper (I) metal complex fluorescence temperature sensor has the advantages of low cost, simple preparation process and great application prospect.

The invention relates to a triligand synergistic enhanced aggregation-induced luminescent organometallic platinum complex luminescent material which has a general structural formula as shown in the specification, wherein N (as shown in the specification) is an organic nitrogen heterocyclic ring which comprises pyridine, pyrimidine, thiazole, benzothiazole, quinoline, isoquinoline, pyrazole and imidazole; R1 is a substituent represented by the N on the nitrogen heterocyclic ring; R2 is a substituent on a benzene ring; R3 is a substituent represented by the N on the nitrogen heterocyclic ring; ois an organic monodentate ligand capable of being directly bonded with a platinum center; under the synergistic action of the three ligands, the organometallic platinum complex luminescent material is endowed with the characteristic of aggregation-induced luminescence, the luminescence efficiency of the luminescent material under the aggregation or high concentration condition is significantly improved, and the preparation of a high-performance organic light emitting diode is very facilitated.

The invention discloses a preparation method of a luminescent collagen polypeptide-lanthanide-series metal composite nanomaterial with cell adhesion function. The preparation method includes the steps: (1) design of collagen polypeptide; (2) synthesis of collagen polypeptide; (3) preparation of a collagen polypeptide-lanthanide-series metal composite nanomaterial; (4) luminescent properties of thecomposite nanomaterial; and (5) cell adhesion function of the composite nanomaterial. The used collagen polypeptide can self-assemble to form a nanofiber material with similar microstructure to natural collagen under the mediation of lanthanide-series metal ions under a condition of wide range of pH. The composite fiber material not only has excellent luminescent properties, but also exhibits good cell adhesion function, provides a new strategy for the structure and function of biomimetic natural collagen and has great development potential in tissue engineering and regenerative medicine.

The invention discloses zinc oxide nanoparticle ink and an electroluminescent device. The zinc oxide nanoparticle ink comprises: zinc oxide nanoparticles; a first solvent, which is alcohol ether witha boiling point of 180-300 DEG C; a second solvent, which is alcohol with a boiling point of 180-280 DEG C; a third solvent, which is ester with a boiling point of 175-280 DEG C; and a fourth solvent,which is fluorocarbon alcohol with a boiling point of 170-220 DEG C. The zinc oxide nanoparticles can be uniformly and stably dispersed in the above system, and the phenomenon of agglomeration or precipitation is avoided after the zinc oxide nanoparticles are placed for a long time. When the zinc oxide nanoparticle ink is used as an electron transport layer of the electroluminescent device, the electroluminescent device has excellent electroluminescent performance.

The invention belongs to the technical field of fluorescent polymer materials and discloses a sulfonated acetone-formaldehyde-amine fluorescent polymer as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing alkaline liquid with pH of 10-12 at normal temperature; sequentially and dropwise adding amine substance, acetone and formaldehyde aqueous solution into the alkaline liquid, and stirring for reaction for 0.5-3h at a temperature of 40-60 DEG C; adding a sulfonating agent and reacting for 2-10h at 65-80 DEG C; evaporating the reaction produced liquid at a temperature of 40-60 DEG C to remove residual acetone and formaldehyde; adding acid for acidifying the product; and purifying and drying to obtain the product. In the invention, the amine substance reacts with the formaldehyde and acetone to synthesize the new sulfonated acetone-formaldehyde-amine fluorescent polymer; and the polymer realizes a more obvious aggregation-induced emission effect, has good water solubility, high fluorescence intensity and relatively strong luminescent property in a solid state and can be applied to the fields such as fluorescence imaging, fluorescence labeling and organic electronic devices.

The invention discloses a high-heat-dissipation luminous keyboard membrane and a preparation method thereof. The high-heat-dissipation luminous keyboard membrane is prepared from the following components of polycarbonate, polyacrylate, luminous powder, graphene, modified attapulgite clay, nanometer titanium dioxide, magnetic component, anti-aging agent, antioxidant and flame retardant. The preparation method comprises the following steps: adding the polycarbonate and the polyacrylate into a reaction kettle, heating, melting, adding the graphene, mixing and reacting for 1 to 2 hours; adding the luminous powder, the anti-aging agent, the antioxidant and the flame retardant, stirring uniformly, and performing shearing dispersion; adding the modified attapulgite clay and the nanometer titanium dioxide, stirring uniformly, placing a mixture into an ultrasonic environment and holding for 10 to 20 minutes, adding the magnetic component, mixing uniformly, and placing a mixture into a membrane forming machine for membrane forming to obtain the keyboard membrane. The keyboard membrane has higher heat dissipation performance and higher luminous characteristic, so that a computer can be operated without turning on a light at night, and the energy consumption is lowered greatly; the high-heat-dissipation luminous keyboard membrane has better significance.

The invention discloses a coumarin-acridone fluorescent probe, and a preparation method and an application thereof. The chemical name of the coumarin-acridone fluorescent probe is 4-methyl-2H-pyrano[2,3a]acridin-2,12(7H)-dione acetate. The preparation method is characterized in that o-bromobenzoic acid and 1-amino-4-methylcoumarin which are taken as initial raw materials undergo a Cu-catalyzed Ullmann reaction and a ring closing reaction to synthesize the coumarin-acridone fluorescent probe. The fluorescent probe has specific selectivity to iron ions, basically has no change with other commonmetal ion fluorescence signals, and has high sensitivity and low detection limit. The coumarin-acridone fluorescent probe can be applied to in-vitro fluorescence detection of iron ions.

The invention discloses a nitrogen-containing discotic ionic liquid crystal compound, which has liquid crystal performance, is wide in liquid crystal temperature range, high in clearing point temperature and good in thermal stability, can be used as a good liquid crystal material, also has a luminescence property, emits yellow light in a solution and a film, has good quantum efficiency, and can beused as an optical material. The precursor nitrogen-containing benzophenanthrene of the compound emits blue light in a solution, wherein the quantum yield is 75%, so that the compound can also be used as a luminescent material. The invention also discloses a synthesis method of the compound, wherein the compound is synthesized by adopting a Suzuki coupling reaction, an intramolecular aromatic hydrocarbon oxidative coupling reaction, an ionization reaction and an ion exchange reaction (metathesis reaction), and the preparation method is short in synthetic route and high in yield.

The present invention is host red luminous material with charge transfer structure and its preparation process. Serial red luminous materials are prepared with three kinds of excellent hole transfer radicals, carbazole, triphenylamine and phenothiazine and its substituent derivative as electron donor, with nitrile radical with strong electrophilic capacity as electron acceptor, and through double condensation reaction to form C=C double bond. The molecular structure of these red luminous materials is characterized in mass spectral analysis, nuclear magnetic resonance spectroscopy, element analysis, etc; the electrochemical property is characterized with circular volt-ampere characteristic; the physical, including optical, properties are researched in ultraviolet absorption and fluorescent spectrum; and device with the material as light emitting layer is made. Experiment shows that the material has excellent light emitting property.

The invention provides an electrochromic nonmetallic salt electrolyte composite material, a preparation method and application, and belongs to the field of electrochromic electrolyte material synthesis. The method comprises the following steps: preparing tungsten oxide sol; then preparing amino or substituted amino modified carbon nanodots; and mixing the amino or substituted amino modified carbonnanodots with tungsten oxide sol, and adding a stabilizer to obtain the electrochromic nonmetallic salt electrolyte composite material. The invention also provides the electrochromic nonmetallic saltelectrolyte composite material obtained by the preparation method. The invention also provides an application of the electrochromic nonmetal salt electrolyte composite material in an electrochromic device. The electrochromic device provided by the invention can realize reversible conversion between yellow and green, and enriches the color types of inorganic electrochromic materials.

The invention provides a preparation method of an organic tin-halogen compound luminescent material. The preparation method is characterized by comprising a step 1: dissolving a tin-source compound and an organic amine compound in an organic solvent, so as to obtain a solution A; a step 2, adding an organic solvent B into the solution A, standing, depositing, pouring out a supernatant solution, and drying an obtained solid, so as to obtain the organic tin-halogen compound luminescent material. An organic tin-halogen compound prepared by the preparation method has no toxicity, a low cost and asimple preparation process, and has a fluorescence quantum yield, which exceeds 80 percent, under the excitation of ultraviolet light, and a composite organic high molecular block based on the material can be used for preparing a luminescent device.