378 results about "Europium ion" patented technology

A halide scintillator material is disclosed where the halide may comprise chloride, bromide or iodide. The material is single-crystalline and has a composition of the general formula ABX₃ where A is an alkali, B is an alkali earth and X is a halide which general composition was investigated. In particular, crystals of the formula ACa_1-yEu_yI₃ where A=K, Rb and Cs were formed as well as crystals of the formula CsA_1-yEu_yX₃ (where A=Ca, Sr, Ba, or a combination thereof and X═Cl, Br or I or a combination thereof) with divalent Europium doping where 0≦y≦1, and more particularly Eu doping has been studied at one to ten mol %. The disclosed scintillator materials are suitable for making scintillation detectors used in applications such as medical imaging and homeland security.

The invention discloses an aluminosilicate base fluorescent powder material and making method doped rare earth europium ion excited by ultraviolet in the luminous material technical domain, wherein the base of fluorescent powder possesses calcium yellow feldspar structure with chemical formula at M2-xAl2SiO7:xEu2+ (M is one of Ca, Sr, Ba; Eu exists at bivalent ion type; x is atom molar quantity between 0.1 and 0.6). The making method of sol-gal process of fluorescent powder comprises the following steps: making the gel with nanometer cement aluminium particle; adding Si at nanometer SiO2 pattern; adding other components at nitrate pattern to form composite gel; spraying; graining; sintering; obtaining the product with particle size at 5um without milling.

The invention discloses a bicolor Eu-MOFs/CDs fluorescent material as well as preparation and an application thereof. Europium ions, trimesic acid and carbon quantum dots are used as raw materials, and the bicolor fluorescent material is prepared through heat treatment in a solvent prepared by mixing N,N-dimethylformamide, distilled water and cyclohexanol. Under irradiation of ultraviolet lamps, the material can emit red fluorescence when dispersed in organic solvents and can emit blue fluorescent when dispersed in water, so that fluorescent colorimetric sensors for measuring water content in organic solvents can be prepared from the material, the prepared sensors are high in sensitivity, good in stability and low in cost and have higher population value and brighter application prospect.

The present invention relates to a new-type singlet oxygen europium fluorescent probe and its application. It is a coordination compound formed by using trivalent europium ion Eu3+ and 2, 2í»:6í»2íŒ-ditripyridine skeleton structure ligand containing functional group. Said invention also provides the structure formula of the described ligand. Said coordination compound can be used for making fluorescent determination of singlet oxygen.

The present invention relates to new europium complex fluorescent probe for the imaging determination of singlet oxygen in live cell and its application. The fluorescent probe is complex formed with trivalent europium ion Eu3+ and organic ligand [4'-(10-methyl-9-anthryl)-2, 2':6'2''-tripyridyl-6, 6''-dimethyl amino] tetracetic acid as shown. The complex can enter to live cell simply in the presence of photosensitizer and capture singlet oxygen in cell specifically, leading to obviously enhanced fluorescence strength of the complex for the fluorescent determination of singlet oxygen in live cell.

The invention discloses a trivalent europium - betta -tdiketone fluorescent label object and use thereof, wherein the four-tooth betta - diketone group ligand includes double betta - diketone group substituted orthobiphenyl benzene skeleton construction, and functional substituent group capable of bonding directly with the biomolecules, whose betta - diketone position can coordinate with the trivalent europium ion and form stable europium complex having strong fluorescence, the complex can bond in covalence with protein, amino acid, polypeptide, nucleic acid, nucleotide and organic compounds to mark these substances by the functional substituent groups contained therein, thus then invention can be used for the time measurement of these articles.

The invention discloses near ultraviolet laser blue luminescent glass ceramic, which is oxyfluoride glass ceramic doped by bivalent europium ion comprising the following components in mol percentage: 45 to 60 percent of SiO2, 0 to 25 percent of Al2O3, 0 to 10 percent of Na2O, 0 to 10 percent of NaF, 0 to 20 percent of ZnF2, 10 to 50 percent of BaF2, 0.5 to 10 percent of EuF3, and 0 to 3 percent of clarificant and/or fluxing agent. A preparation method comprises processes of high-temperature melting in a reducing atmosphere and crystallization heat treatment, wherein trivalent europium ion is reduced to the bivalent europium ion. The method is simple, has no pollution and has low cost. The glass ceramic has wide excitation spectra in a near ultraviolet region (between 350 and 420 nanometers), can produce blue luminescence under excitation of GaInN near ultraviolet light LED, and has the characteristics of high luminosity, ultraviolet radiation resistance, and good chemical stability and thermal stability.

This invention relates to a kind of beta- diketone-triatomic europium complex nanometer fluorescent probe and its preparation and application. Its steps are the following: the monomer which can copolymarized with silicate ester takes conjugated bonding reaction with beta- diketone-triatomic europium complex in organic solvent and then takes copolymerization with silicate ester to form functional nanometer rare earth fluorescence particles. The said triatomic europium ion, beta - diketone organic complex and the monomer and silicate ester take the mol proportion as 1 : 2-3 : 10-100 : 350-450. The particles is of higher fluorescence and stability and has in its surface with active function group directly used for biological marking and is free of interference of scattered light and short light when used for detecting time-resolution fluorescent. This invention is of high value in fields of time-resolution fluorescent immune detecting, cell chemistry, microscope forming, DNA crossing detecting and biological chip detecting.

A blue fluorescent material having excellent durability and a high luminance, especially one emitting a high-luminance light by the action of electron rays. The fluorescent material comprises inorganic crystals having a crystal structure which is an AlN crystalline, AlN polycrystalline, or AlN solid-solution crystalline structure. It is characterized in that the inorganic crystals contain at least europium in solution and have an oxygen content of 0.4 mass % or lower and that the fluorescent material emits fluorescence derived from divalent europium ions upon irradiation with an excitation source. More preferably, the fluorescent material contains a given metallic element and silicon. Also provided are a process for producing the fluorescent material and an illuminator including the blue fluorescent material.

The invention discloses a hydro-thermal preparation method for spherical boric acid yttrium doped europium fluorescent powder in a hollow structure. 0.01 to 1.0 mole/liter yttrium ions, europium ions and boric acid are mixed, the mole ratio of the yttrium ions to the europium ions to the boric acid in the mixed solution is 19/1/20, organic topography induction reagents are added into the mixed solution, the ratio of the mol number of the added organic topography induction reagents to the sum of the mol number of the yttrium ions and the europium ions is 3/2, 1 to 8 milliliters of nucleating reagents are added into the mixed solution, and suspending liquid is obtained; the alkali liquor is used for regulating the pH to be 8 to 10; the suspending liquid is moved into a 100mL reaction kettlefor carrying out hydrothermal reaction; and the heat treatment is carried out on powder products after the hydrothermal reaction, and the spherical fluorescent powder in the hollow structure is obtained. The spherical boric acid yttrium doped europium fluorescent powder has the smaller specific gravity because of the adoption of the hollow structure, and requirements of luminescent devices on light weight of fluorescent luminescent materials can be met.

The invention provides a preparation method and application of a europium coordination polymer for visible detection on p-nitrophenol and iron ions, and belongs to the technical field of novel materials. The preparation method comprises the following step: under a hydrothermal or solvothermal condition, performing molecular self-assembly on metal europium ions, organic ligand and a structure-directing agent with additives, thereby synthesizing the europium coordination polymer. The europium coordination polymer is excellent in fluorescent sensing property for the p-nitrophenol and the iron ions; a piece of detection test paper can be prepared from the synthesized europium coordination polymer and a carrier in a compounding manner, and rapid, simple, convenient and visible detection on the p-nitrophenol and the iron ions can be achieved. Compared with the prior art, the prepared europium coordination polymer and the test paper can achieve selective detection on the p-nitrophenol and the iron ions, have the characteristics of low preparation cost and rapid and accurate detection, and have good application prospects.

The invention discloses a europium ion-doped carbon quantum dot and a preparation method thereof. The carbon quantum dot uses citric acid as a precursor carbon source, has a europium ion doping concentration of 0.5-5%, is in a shape of sphere and has a diameter of 1-10 nm; and the preparation method comprises the following steps: weighing and placing citric acid in a beaker, adding water, stirringand dissolving to obtain a citric acid solution; weighing rare earth europium oxide, dripping concentrated nitric acid, and reacting the rare earth oxide completely to obtain a rare earth nitrate solution; mixing the nitric acid solution with the rare earth europium nitrate solution, stirring and then performing hydrothermal reaction at 100-240 DEG C for 2-15 h to obtain yellow transparent liquidwhich is a europium ion-doped citric acid carbon quantum dot. The europium ion-doped carbon quantum dot has the advantages of high purity of a synthesized product, excellent luminescence and stability of the product, and adjustable color of the carbon quantum dot, overcomes luminescence singleness of traditional carbon quantum dots, enables luminescence to move to a red light region, and has goodapplication prospect in fields of optical devices, biomedicines and the like.

The invention relates to a light-emitting/transmitting plastic lampshade. The plastic lampshade takes one or more transparent or semitransparent thermoplastic resin as base resin and comprises a strontium aluminate salt luminous pigment, which is 10-30% in weight percentage and 30-120 mu m in particle size and is excited by rare earth europium ions and dysprosium ions. The chemical formula of the luminous pigment can be represented as SrAl2O4:Eu<2+>,Dy<3+> or Sr4Al14O25:Eu<2+>,Dy<3+>. Before being compounded with the base resin, the luminous pigment is subjected to cladding treatment by using polymethyl methacrylate with the thickness being 0.1-1 mu m at first. The molding method of the lampshade comprises the steps of extruding, injection molding and blow molding, and the lampshade has the thickness ranging from 1mm to 3mm. The lampshade has good light transmittance and luminance, is more than 65% in light transmittance, exceeds 80mcd/m<2> in luminance within 10min, and exceeds 10mcd/m<2> in luminance within 60min. The light-emitting/transmitting plastic lampshade can not only guarantee the daily illumination function but also fulfill functions of emergency illumination and evacuation indication in a dark environment, and is simple in structure, convenient to machine and obvious in cost advantage.

A NaGdF4 multifunctional fluorescent label nano-material based on europium ion dual-mode luminescence. In the invention, Tm<3+> (Yb <3+>) and Eu<3+> are respectively mixed into cores and shell bodies of NaGdF4 nanometer crystals, and thus europium ion dual-mode luminescence is realized in monodisperse hexagonal phase NaGdF4 nanometer crystals. Through co-sensitization of Tm<3+> and Yb <3+> in the cores and the advantages of core-shell structures, strong europium ion red up-conversion luminescence is realized under near-infrared light of 980nm, and strong europium ion red down-conversion luminescence is realized under ultraviolet light of 273nm. The monodispersed NaGdF4 nanometer crystals which have the core-shell structures and can generate europium ion up-conversion luminescence and europium ion down-conversion luminescence can be utilized as a multifunctional fluorescent label nano-material after being treated by surface functionalization. The NaGdF4 fluorescent label nano-material with core-shell structures comprises NaGdF4 comprising 0 to 50 molar percent Yb <3+> and 0 to 10 molar percent Tm<3+>, and NaGdF4 comprising 0 to 50 molar percent Eu<3+>.

The invention discloses a preparation method of near ultraviolet-excited high silica blue-light-emitting glass. The preparation method comprises the steps of: firstly melting borosilicate glass, carrying out acid leaching to obtain large-aperture and intact porous glass after carrying out thermal treatment on split-phase at a higher temperature; dipping the porous glass into solution containing europium ion to soak and dope, and sintering at the high temperature in a reducing atmosphere to obtain the compact high silica blue-light-emitting glass. The glass disclosed by the invention greatly improves the doping concentration of the europium ion under the precondition of keeping the luminous intensity of the near ultraviolet-excited high silica blue light emitting, and facilitates laser excitation. The optimal excitation wavelength of the glass disclosed by the invention is expanded to a range of 350-390nm, so a high-pressure mercury lamp which is relatively safe to a human body and mature in the development and an LED (light-emitting diode) can be utilized as excitation light sources by the improvement, and the safety and convenience in application are improved. Therefore, the preparation method can be applied to the industries such as illumination and decoration and life purposes, and is expected to be a new laser material.

The present invention adopts dibenzoyl methane (DBM) or trifluoroacetyl-thiopheneacetone (TTA) matched with trivalent europium ion energy as first ligand, adopts 3,4,7,8-tetramethyl-1,10-phenanthroline as second ligand, then utilizeks the first ligand and second ligand according to mole ratio of 3:1 and the trivalent europium ion to form ternary europium compounding material, and makes the prepared red light rare earth organic compound material electroluminescent material into the electroluminescent device, its efficiency can be up to 4.7 cd/A, and maximum luminance is 800 cd/sq.m.

The invention discloses a preparation method of a spherical luminescent material doped with europium-yttrium borate. Dissolve soluble yttrium salt and europium salt into deionized water to obtain a mixed solution; add borate into the solution to be fully dissolved; the ratio of the total mole number of the borate and the total mole number of the soluble yttrium salt is 1-1.5; add the precipitant into the solution to obtain a colorless and transparent solution. Put the solution into a stainless steel high pressure reactor provided with polytetrafluoroethylene lining; carry out hydrothermal reaction; centrifuge and dry the treated solution to obtain the material. The invention induces the generation of borate salt by decomposing the precipitant under high temperature by a simple hydrothermal method and forms yttrium borate luminescent material doped with europium and having special spherical shape, the molecular formula is YBO3: Eu<3+>. The ball size is uniform with the diameter between 100 nm to 1 Mum, thus having excellent dispersibility, and having a strongest red emission peak at 619 nm, which belongs to the 5 0-72 transition of an europium ion.

This invention relates to a photosensitive shining Europium complex and its photosensitive ligand molecule, also relates to the synthetic method. The Europium complex structure is showd as VI: the R1, R2 is alkyl with 1 to 4 carbon atoms, R3, R4, R5, and R6 are same and are methyl or H, the R8 is methyl or H. The organic photosensitive ligand molecule structural formula is showd as I: the R1, R2 is alkyl with 1 to 4 carbon atoms, R3, R4, R5, and R6 are same and are methyl or H, the R8 is methyl or H. The photoallergy molecule possess fine long wave photoactivate Europium ion luminance. The new style Europium complex possess width activating window, at the same time possess large two-photon absorption acting section and / or high rare earth ion fluorescence quanta yield, is useful for preparing excellent bioluminescence probe stuff, possess comprehensive application prospects.

The invention relates to lanthanum boron tungstate red fluorescent powder and a preparation method of the lanthanum boron tungstate red fluorescent powder. Active ions of the fluorescent powder are trivalent rare earth europium ions Eu3+, and the molecular formula is La(1-x)EuxBWO6, wherein x is the molar percentage of Eu3+ doping amount, and x is greater than 0.0001 and less than or equal to 0.5; the fluorescent powder can generate very strong exciting light near wavelength of 400nm and 450nm, and the red light emission wavelength is mainly in 616nm and 696nm; and the fluorescent powder conforms to the using requirement of white light LED (light emitting diode). According to the invention, the preparation process of a base material is pollution-free, simple in technology and low in energy consumption, avoids emission of wastewater and waste gas, is environment-friendly and can be finished on common equipment; and the lanthanum boron tungstate red fluorescent powder is easy to collect.

The invention relates to a method for preparing a europium-doped sulfur oxide gadolinium light-emitting nanometer fiber and belongs to the technical field of preparation of nanometer materials. The invention aims at the problem that a europium ion-doped sulfur oxide gadolinium light-emitting nanometer particle, a nanometer tube, a nanometer wire, a nanometer rod, a nanometer flower and a polyhedral nanometer crystal are prepared in the prior art. A Gd2O2S: 5 percents of Eu3+nanometer fiber is prepared by adopting a method of combining an electro-spinning technology and a vulcanization technology. The preparation method comprises the two steps of: firstly, preparing a Gd2O3: 5 percents of Eu3+nanometer fiber: preparing a PVP/[Gd(NO3)3+Eu(NO3)3] composite nanometer fiber by adopting the electro-spinning technology and then carrying out heat treatment to obtain the Gd2O3: 5 percent of Eu3+nanometer fiber; and secondly, preparing the Gd2O2S: 5 percent of Eu3+nanometer fiber: vulcanizing the Gd2O3: 5 percent of Eu3+nanometer fiber with sulphur by adopting a double-crucible method to obtain the pure-phased Gd2O2S: 5 percent of Eu3+nanometer fiber. The obtained Gd2O2S: 5 percent of Eu3+nanometer fiber has good crystal forms and also has a diameter of 118-160 nm and a length of greater than 100mu m. The preparation method is simple and easy and is suitable for batch production. The europium-doped sulfur oxide gadolinium light-emitting nanometer fiber is a novel important red nanometer fluorescent material and has wide application prospect.

The invention discloses a time-resolved fluoroimmunoassay used for detecting Dkk1 and a kit thereof. The fluoroimmunoassay includes the following steps: 1. solid-phase anti-body preparing; 2) europium ion marker antibody preparing; and 3) the assay method: based on the double anti-body sandwiched immunoreaction. The invention has the advantages of relatively high sensitivity, specificity and stability on detection of Dkk1; the invention also has a supermatic analytical system which can not only enhance the speed of clinical test results, but also significantly reduce the personal errors and improve the reliability of the test results.

The invention relates to a ternary rare-earth organic framework crystal material. A chemical formula of the ternary rare-earth organic framework crystal material is [Me2NH2][EuxTbyGd1-x-yL(H2O)4], wherein x is more than 0 and less than or equal to 0.05 and y is more than 0 and less than or equal to 0.1; Me represents methyl, L represents an organic ligand formed by pyridine-2,6-isophthalic acid; a crystal belongs to an orthorhombic crystal system and a space group is Pnma; the crystal belongs to the orthorhombic crystal system and the pace group is Pnma; the lattice parameters are as follows: a=8.500 to 8.506 angstroms, b=17.28 to 17.35 angstroms, c=12.05 to 12.15 angstroms, alpha=90, beta=90, gamma=90 and Z=4. The ternary rare-earth organic framework crystal material provided by the invention has very high heat stability and air stability; under the stimulation of ultraviolet light, characteristic emission of europium ions and terbium ions can be emitted simultaneously; the ternary rare-earth organic framework crystal material has very good linear response on temperature at the ratio of 77K to 450K, so that the ternary rare-earth organic framework crystal material can be used for temperature detection in a wide range.

The invention discloses mixed-valence-state europium (Eu) ion doped single-matrix color-adjustable fluorescent powder and a preparation method thereof. An expression formula of the chemical composition of the fluorescent powder is Ca2-xEuxSiO2F2, wherein Eu is an active ion, and is in +2 and +3 mixed-valence state; x is a molar percentage coefficient accounted by the active ion Eu relative to an alkaline earth metal ion Ca, and x is more than or equal to 0.001 and less than or equal to 0.10; according to the fluorescent powder, the active ion Eu is doped into a matrix Ca2SiO2F2, and under the condition that the matrix Ca2SiO2F2 can be effectively activated by near-ultraviolet light, adjustable emission of a fluorescent powder material from blue light to orange red light can be achieved by changing the doping concentration of the active ion Eu and adjusting the emission peak ratio of the blue light of bivalent Eu ions to red light of trivalent Eu ions; and specifically, with the increase of Eu ion doping concentration, the relative strength of red light emission of Eu<3+> can be increased, and the light emitting color of Ca2-xEuxSiO2F2 is gradually changed from blue to white, and is continuously changed to orange.