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58results about How to "Obvious red shift" patented technology
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Method for preparing nitrogen-doped TiO2 photocatalytic film
InactiveCN101884938AImprove absorption efficiencyReduce pollutionSurface reaction electrolytic coatingCatalyst activation/preparationMaterial DegradationMicro arc oxidation
The invention provides a method for preparing a nitrogen-doped titanium dioxide (TiO2) photocatalytic film, which comprises: firstly, performing nitriding treatment on a metal titanium or titanium alloy surface by using a ion nitriding process; and secondly, growing a TiO2 thin film in situ on the metal titanium or titanium alloy substrate obtained after the nitriding treatment by using a microarc oxidation technique. The method is used in the field of photocatalytic purification. Compared with a TiO2 thin film which is not doped with nitrogen, the nitrogen doped TiO2 photocatalytic film prepared by the method has the advantages that: the ultraviolet light and visible light absorption efficiency is improved obviously; the intensity of light generated current is improved obviously; and the organic material degradation efficiency is improved obviously.
Owner:WUHAN UNIV
Method for producing ultra-small water soluble near-infrared Ag2S quantum dots
ActiveCN102826585ASmall sizeGood water solubilityNanotechnologyLuminescent compositionsSolubilityFluorescence spectra
The invention relates to a method for producing ultra-small water soluble near-infrared Ag2S quantum dots, which adopts the one-pot method for production. The method for producing ultra-small water soluble near-infrared Ag2S quantum dots comprises the following steps of: 1) uniformly mixing a protein water solution with an AgNO3 water solution and carrying out reaction for 5 minutes at the normal temperature under the condition of magnetic stirring; 2) adjusting the pH value of the liquid with a NaOH water solution to 12.0; and 3) adding a chalcogenide water solution with the concentration of 10-100 millimole / l into the liquid and adjusting the mole ratio of the Ag element and the S element to (6-1):1, and reacting for 12 hours under the conditions of stirring and 37 DEG C to produce the ultra-small water soluble near-infrared Ag2S quantum dots of smaller than 2 nanometers. The method has the advantages that the quantum dots produced by the method have the excellent properties of no-toxic heavy metal elements, small size, good water solubility, high luminous efficiency, adjustability in fluorescence spectra within near-inferred areas and the like; and the production method is safe, easy and convenient to operate, has small toxicity and low cost, and is easy to popularize and use in a large scale.
Owner:NANKAI UNIV
Keggin type phosphotungstic acid composited zirconium-based MOF (metal-organic framework) photocatalyst and preparation method thereof
ActiveCN108295878ASimple preparation processEasy to operateOrganic-compounds/hydrides/coordination-complexes catalystsCatalyst activation/preparationN dimethylformamideTetrachloride
The invention relates to a Keggin type phosphotungstic acid composited zirconium-based MOF (metal-organic framework) photocatalyst and a preparation method thereof. The technical scheme is that the preparation method comprises the following steps: zirconium tetrachloride, N,N-dimethylformamide and hydrochloric acid are mixed and ultrasonically dissolved, and a zirconium tetrachloride mixed solution is obtained; 2-aminoterephthalic acid is dissolved in N,N-dimethylformamide, and an organic ligand solution is obtained; the zirconium tetrachloride mixed solution and the organic ligand solution are mixed and stirred, a precursor solution of a zirconium-based MOF compound is obtained, then Keggin type phosphotungstic acid is added and stirred, and a precursor solution of the Keggin type phosphotungstic acid composited zirconium-based MOF photocatalyst is obtained; the precursor solution is transferred into a reactor and subjected to a hydrothermal reaction, then centrifugation, washing anddrying are performed, and the Keggin type phosphotungstic acid composited zirconium-based MOF photocatalyst is obtained. The process is simple, operability is high, and the product can improve separation of photo-generated electron-hole pairs in a photocatalysis process and has excellent visible-light-based water splitting for hydrogen production.
Owner:WUHAN UNIV OF SCI & TECH
Rare earth nano silicate red phosphor and its preparation method
InactiveCN1702145AImprove light color purityFine particle sizeLuminescent compositionsLuminous intensityEngineering
The invention discloses a rare-earth nanometer metasilicate red fluorophor and the method for preparation. It contains the following setups: dissolving sensitizer activator substrate yttrium oxide in norbiline (or azotic acid), pressure-reduced distilling to eliminate water and excess acid, adding alcohol to prepare clear and transparent solution, and adding substrate silicon material to prepare transparent sol, pressure-reduced distilling to eliminate alcohol and acquiring powder solid, and adglutinating in 550-750 Deg. C by 2-4 hours to prepare the product. It prepares rare-earth nanometer red fluorescent powder in a low temperature (600 Deg. C) and a short time (3 hours), the average grain diameter being about 60-80 nm, the luminous intensity strong, chemical and optical property stable, the material easily obtained and cheap. Chemical expression formula of the rare-earth nanometer red fluorescent powder is as following: (YxSiy0z: Euj, Mn.
Owner:SHANGHAI NORMAL UNIVERSITY
Fluorescence probe based on 1, 3, 4-oxadiazole derivative, and synthetic method and applications thereof
ActiveCN103642487AEasy to separate and purifyRaw materials are easy to getOrganic chemistryFluorescence/phosphorescenceSolventStructural formula
The invention discloses a fluorescence probe based on 1, 3, 4-oxadiazole derivative, and a synthetic method and applications thereof. Chemical formula of the fluorescence probe is represented in the invention. The synthetic method comprises following steps: N-[2-(5-phenyl-1, 3, 4-oxadiazole-2-yl)phenyl]-2-chloroacetamide, di-(pyridylmethylene)amine, N, N-diisopropylethylamine and potassium iodide are added into acetonitrile so as to obtain a mixture; the mixture is stirred, and is subjected to heating reflux under protection of nitrogen; solvent removing is realized via reduced pressure distillation, and obtained residues are subjected to column chromatography for separation so as to obtain the fluorescence probe N-[2-(5-phenyl-1, 3, 4-oxadiazole-2-yl)phenyl]-2-di(2-pyridylmethylene) acetamide. The raw materials are easily available; the synthetic method is simple; product separation and purification processes are easy; and the fluorescence probe possesses excellent water solubility, can be used for Zn<2+> monitoring analysis and tracer analysis in water environmental systems and biological cell systems, and possesses excellent sensitivity and relatively strong anti-interference capability on detection of Zn<2+>.
Owner:BOHAI UNIV
TiO2/NaYF4 composite material and preparation method thereof
InactiveCN104607213ABroaden the range of wavelengths that absorb the solar spectrumImprove photocatalytic performancePhysical/chemical process catalystsRare-earth elementSemiconductor
The invention discloses a TiO2 / NaYF4 composite material and a preparation method thereof, and relates to the technical field of photocatalysis. The composite material is higher in photocatalysis capability, low in cost, safe, pollution-free and higher in stability. The invention discloses theTiO2 / NaYF4 composite material, wherein NaYF4 in the TiO2 / NaYF4 composite material is rare earth doped NaYF4, and doped rare earth elements comprise a sensitizing agent and an activating agent; a heterogeneous structure is formed between TiO2 and the rare earth doped NaYF4 in the TiO2 / NaYF4 composite material. The TiO2 / NaYF4 composite material and the preparation method thereof disclosed by the invention are suitable for the photocatalysis process of semiconductor nanomaterials.
Owner:QINGHAI UNIV FOR NATITIES
Triphenylamine-BODIPY derivative organic dye and preparation method thereof
InactiveCN104559286AHigh yieldReaction conditions are easy to controlMethine/polymethine dyesGroup 3/13 element organic compoundsEnvironmental energyOrganic solar cell
The invention discloses a triphenylamine-BODIPY derivative organic dye and a preparation method thereof. The triphenylamine-BODIPY derivative organic dye is prepared by that a triphenylamine-aldehyde compound is in reaction with pyrrole under the catalytic action of a catalyst, so as to synthetize dipyrromethane, and then a triphenylamine-BODIPY derivative is obtained through further oxidation and fluorine boronizing, and the general formula is shown in a structural formula I. The stokes displacement value of the triphenylamine-BODIPY derivative can reach 180 to 238 nm, and the fluorescence emission peak thereof locates in the near infrared region of 700 to 800 nm. The synthetic method of the compound is simple, the reaction is easy to control, the yield is high, common applicability is achieved, so that the BODIPY dye can be composited efficiently, and can be widely applied to the field of bioscience, analytic chemistry, environmental energy science and the like, and is particularly used as a near-infrared fluorescent dye and an organic solar cell material (refer to the description).
Owner:DONGGUAN UNIV OF TECH
|+| type graphene metamaterial capable of realizing plasmon induced transparency and application of |+| type graphene metamaterial
InactiveCN109546349ADoes not involve stacking issuesGood repeatabilityAntennasOptical elementsStructural symmetrySlow light
The invention belongs to the field of plasmon induced transparency, and particularly discloses a graphene metamaterial for realizing plasmon induced transparency. The material is composed of a substrate and a graphene layer arranged on the substrate, wherein the graphene layer is composed of |+|type graphene structure units which are periodically arranged on the substrate, and each|+|type graphenestructure unit comprises two vertically-arranged parallel graphene strips and a cross-shaped structure arranged between the parallel graphene strips. The structure is simple, the chromatic dispersionat the transparent window is large, the group speed can be effectively and rapidly slowed down to generate a slow light effect, and the position of the transparent window can be changed by adjustingFermi energy in a terahertz range. In addition, the transparent window can be regulated and controlled by breaking structural symmetry. The graphene metamaterial has a wide application prospect in optical switches, slow light devices, sensors and highly integrated optical paths.
Owner:ZHENGZHOU UNIV
Photonic crystal material with humidity response allochroic characteristic and preparing method thereof
InactiveCN105153456AGood water absorptionAchieve humidity-responsive color-changing propertiesOptical elementsPhotonic crystalIn situ polymerization
The invention relates to a photonic crystal material with humidity response allochroic characteristic and a preparing method thereof, and belongs to the field of material science. The preparing method includes the steps that a biological material of a photon structure serves as a biological template and is soaked in a precursor solution containing monomers, an initiator and a crosslinking agent, after diffusive equilibrium is reached, the template is taken out and heated to be subjected to an in-situ polymerization reaction, by means of the chemical bond connection function of the crosslinking agent, the surface of the template is evenly covered with a polymer, the own special hierarchical photon structure is reserved, and the obtained composite material has the obvious humidity response allochroic characteristic. Compared with the prior art, the responsiveness photonic crystal material is of the special hierarchical structure, has excellent response characteristic in the humidity response aspect and has potential application prospects in the field of chemical sensing.
Owner:SHANGHAI JIAO TONG UNIV
Cr<3+>-doped germanium-containing garnet phase broadband near-infrared fluorescent powder and preparation method thereof
PendingCN111778027AObvious red shiftImprove efficiencyLuminescent compositionsHigh volume manufacturingPhysical chemistry
The invention discloses a Cr<3+>-doped germanium-containing garnet phase broadband near-infrared fluorescent powder and a preparation method thereof, and belongs to the technical field of near-infrared luminescence. The germanium-containing garnet phase fluorescent powder is prepared by a high-temperature solid-phase method, and the preparation method comprises the following steps: grinding and uniformly mixing solid powder raw materials, calcining at 1200-1500 DEG C for 1-3 times, and finally grinding to obtain a final product. On the basis of a garnet structure with stable chemical properties and high luminous efficiency, the garnet phase structure fluorescent powder containing elements such as germanium, zinc, magnesium, calcium, strontium and the like is constructed in a weak crystal field environment, so that a Cr<3+> emission peak is red-shifted to a near-infrared region. The obtained garnet fluorescent powder realizes red shift of a Cr<3+> emission peak, has excellent propertiesof near-infrared broadband luminescence, wide emission range (650-850 nm), capability of being excited by blue light, high emission efficiency and the like, and is low in raw material cost, simple and convenient in operation method and capable of being produced on a large scale.
Owner:ZHEJIANG UNIV OF TECH
Synthesis and application of dinuclear ring metal platinum (II) complex near-infrared electrophosphorescent material containing different conjugated bridges
InactiveCN107400147AImprove the rigidity of the structureEnhanced spin couplingSolid-state devicesPlatinum organic compoundsRigid structureLight-emitting diode
The invention discloses a dinuclear ring metal platinum (II) complex near-infrared electrophosphorescent material containing different conjugated bridges, and application of the electrophosphorescent material to an organic electroluminescent diode. The dinuclear ring metal platinum complex near-infrared electrophosphorescent material uses different conjugated rigid structures (benzene, 1,4-difluorobenzene, carbazole, fluorene and pyrene) as luminous kernel donor (D) units, and uses nitrogen-containing dentate conjugate ligands (isoquinoline, anthraquinoline and phenanthridine) as receptor (A) units for building the ring metal platinum complex near-infrared electrophosphorescent material using A-D-A structure as a main ligand, using 2,2,6,6-tetramethyl-3,5-heptadione as an auxiliary ligand and using platinum ions. The organic electrophosphorescent luminous device is prepared by using the near-infrared electrophosphorescent material as a luminous layer doping agent and using m-MTDATA:CBP as a body material. The device is a near-infrared electrophosphorescent luminous device with the maximum emitting peak being 709nm, the outer quantum efficiency being 3.97 percent and the maximum radiation degree being 2354nW.Sr<-1>.cm<-2>.
Owner:CHANGZHOU UNIV
Preparation method of boron-nitrogen-containing small molecules and conjugated macromolecules and application in fluorine ion sensing
ActiveCN108409766AHigh sensitivityAchieve colorimetric selective identificationTin organic compoundsGroup 3/13 element organic compoundsFluorescenceChemical stability
The invention discloses a preparation method of boron-nitrogen-containing small molecules and conjugated macromolecules and application in fluorine ion sensing, and belongs to the technical field of preparation of fluorescent compounds and preparation of fluorescent probes. A boron ring compound is synthesized via BTE (boron-tin-exchange) reaction; the boron ring compound is subjected to ring-expanding reaction via azide molecules by utilizing Lewis acidity of high boron, and a series of boron-nitrogen-containing (BN-containing) small-molecular monomers are prepared; boron-nitrogen-containingconjugated macromolecules are successful prepared via Stille coupling. Both boron-nitrogen-containing small molecules and macromolecules are suitable for colorimetric selective recognition for fluorine ions. The preparation method of the boron-nitrogen-containing fluorescent compound is simple, and has mild reaction conditions; a prepared fluorescent probe has good opto-chemical stability, high sensitivity and good selectivity.
Owner:XI AN JIAOTONG UNIV
Ce-doped water-soluble CdTe quantum dot synthetic method
InactiveCN103937502AHigh luminous intensityEasy to operateMaterial nanotechnologyLuminescent compositionsSynthesis methodsRare earth
The invention relates to a Ce-doped water-soluble CdTe quantum dot synthetic method, which selects soluble cadmium salt as a cadmium source, tellurium dioxide as a tellurium source and mercaptoacetic acid as a stabilizing agent, and the Ce-doped water-soluble CdTe quantum dot is synthesized in a water phase system. The synthetic method has the advantages of simple and safe process. Compared with a traditional water phase synthesis approach, in the invention, preparation of a NaHTe precursor is not required, no H2Te toxic gas is discharged in a whole synthesis process, and the synthesis method has the characteristics of mild synthesis condition, easy control, simpleness, rapidity and environmental protection. maximum fluorescence emission wavelength of CdTe: Ce quantum dot enables obvious bathochromic shift, the fluorescence emission peak scope of the rare earth Ce-doped water-soluble CdTe quantum dot is 540-570nm, and the particle size is 3-5nm.
Owner:南宁市鼎光电子有限责任公司
Method for preparing carbon-doped TiO2 film by using two-step method
InactiveCN104195520AObvious red shiftIncrease absorbanceVacuum evaporation coatingSputtering coatingSputteringTitanium
The invention discloses a method for preparing a carbon-doped TiO2 film by using a two-step method. The method comprises the following steps: (1) a TiO2 film is prepared by adopting a magnetron sputtering method; processed glass, silicon sheet and titanium sheet substrates are put in place; a TiO2 ceramic target serves as a sputtering target; a background is kept in 2*10-3 Pa order of magnitude in vacuum; 99.999% of argon and compensate oxygen are charged; the sputtering power is 300 W; the sputtering time is 30 minutes; and the temperature is kept for 2 hours in the air of 500 DEG C, and is naturally reduced; and (2) C is injected in the TiO2 film by using an ion injecting method; samples are put in an ion injecting chamber; CH4 gas is charged; the pressure is 1 Pa; the radio-frequency power is 40 W; the voltage is respectively 8, 10, 12, 14 and 16 kV; and the frequency is 50 Hz. The injecting time of each sample is 30 minutes. The C-TiO2 film prepared by the method has excellent light degradation effect.
Owner:GUIZHOU MINZU UNIV
Method for preparing titanium dioxide nanometer material with exposed nonmetal-metal co-doped (001) surface
InactiveCN102716760ASimple processThe preparation process is simple and controllablePhysical/chemical process catalystsSolar cellTitanium oxide
Owner:WUHAN UNIV
Meso-triphenylamine-substituted 3,5-aryl-modified boron dipyrromethene fluorophore derivatives and preparation method thereof
ActiveCN104628753AHigh synthetic yieldReduce manufacturing costAzo dyesGroup 3/13 element organic compoundsEnvironmental energyOrganic solar cell
The invention discloses meso-triphenylamine-substituted 3,5-aryl-modified boron dipyrromethene fluorophore derivatives (BODIPY) and a preparation method thereof. The meso-triphenylamine-substituted 3,5-aryl-modified boron dipyrromethene fluorophore derivative has a structure shown in a general formula I. The boron dipyrromethene fluorophore derivatives have an obvious red-shift phenomenon in comparison with ultraviolet absorption of BODIPY matrix; a fluorescence emission peak of the derivatives is close to a near-infrared region; and the synthesis method is simple, easy to control, and relatively high in yield, and has universality, so that the BODIPY dye can be efficiently synthesized and widely applied to the fields such as life science, analytical chemistry and environmental energy science, and especially can be applied to organic solar cells.
Owner:宿州市徽腾知识产权咨询有限公司
Fluorine-containing phenanthrene quinoxaline and thiophene conjugated polymer
The invention discloses a fluorine-containing phenanthrene quinoxaline and thiophene conjugated polymer, the energy gap and the HOMO energy level of the polymer are reduced simultaneously, and needs of polymer photovoltaic cell photoactivity layer electron donor materials is met. The conjugated polymer has the structural general formula shown in the description. The polymer disclosed by the invention has deeper HOMO energy level than a polymer D and can be as deep as -5.67 eV, and high open circuit voltage of more than 0.89 V can be obtained when the polymer is applied in photovoltaic cells.
Owner:XIAN MODERN CHEM RES INST
Method for preparing high-efficiency Bi-containing photocatalyst and Bi-containing photocatalyst prepared by method
InactiveCN107376892AImprove separation efficiencyEfficient photocatalytic activityWater/sewage treatment by irradiationMetal/metal-oxides/metal-hydroxide catalystsUv vis absorbanceRed shift
The invention discloses a method for preparing a high-efficiency Bi-containing photocatalyst and the Bi-containing photocatalyst prepared by the method. The method comprises the following steps: preparing a titanium source solution; preparing a bismuth source solution; reacting; filtering and collecting; roasting. According to the method disclosed by the invention, P25(TiO2) is utilized as a titanium source, and the P25(TiO2) is dipped and adsorbed by a Bi(NO3)3 solution and treated by high temperature to obtain the Bi-loaded nano TiO2 photocatalyst. Ultraviolet and visible absorption of the photocatalyst has obvious red shift and can be expanded to a visible light range; furthermore, the catalyst has a simple preparation method, easily obtained raw materials, low production equipment requirement and convenience in achieving industrial operation.
Owner:JIANGSU HELPER FUNCTIONAL MATERIALS
Garnet-form aluminosilicate fluorescent powder, preparation method thereof and light-emitting device including same
ActiveCN107880885AImprove quantum efficiencyExcellent thermal quenching performanceLuminescent compositionsSemiconductor devicesFluorescenceCrystal structure
The invention discloses garnet-form aluminosilicate fluorescent powder. The chemical formula of the garnet-form aluminosilicate fluorescent powder is (Lu1-x-yLnxCey)aMgbAlcSidOe, wherein a is more than or equal to 1.8 and less than or equal to 2.2, b is more than or equal to 1.8 and less than or equal to 2.1, c is more than or equal to 1.8 and less than or equal to 2.2, d is more than or equal to1.8 and less than or equal to 2.1, e is more than or equal to 1.8 and less than or equal to 2.2, Ln represents one or more of Sc, Y, Gd and La in any proportion, x is more than or equal to 0 and lessthan or equal to 0.15, and y is less than or equal to 0.08. The prepared fluorescent powder has a crystal structure of yttrium aluminum garnet, can be optically excited by light with a wave length less than 520nm and can emit visual light with a peak value from 560nm to 590nm. Besides, the invention further discloses a preparation method of the fluorescent powder and a light-emitting device including the fluorescent powder.
Owner:GRIREM ADVANCED MATERIALS CO LTD
In2S3/MIL-53 (Fe) efficient photocatalytic composite material as well as preparation method and application thereof
ActiveCN112371190ARough surfaceMany active sitesWater/sewage treatment by irradiationOrganic-compounds/hydrides/coordination-complexes catalystsAlcoholActive site
The invention provides an In2S3 / MIL-53(Fe) efficient photocatalytic composite material, a preparation method and application. The mass ratio of In2S3 to MIL-53(Fe) is (10-30):1. The preparation methodcomprises the following steps: step 1, mixing InNO3 hydrated with 4.5H2O with MIL-53(Fe), and adding the mixture into water; step 2, dissolving L-cysteine in the same amount of water as that in the step 1; step 3, dropwise adding the solution obtained in the step 2 into the mixed solution obtained in the step 1 under a stirring condition, conducting stirring at room temperature, transferring a formed mixture into a high-pressure reaction kettle with a polytetrafluoroethylene lining, and carrying out sealed reaction; and step 4, naturally cooling the reacted mixed solution obtained after the reaction in the step 3 to room temperature, repeatedly conducting washing with water and absolute ethyl alcohol to remove impurities from the product, and conducting drying to obtain the In2S3 / MIL-53(Fe) high-efficiency photocatalytic composite material. According to the efficient photocatalytic composite material disclosed by the invention, In2S3 is introduced, so that the diameter of an MIL-53(Fe) microrod is increased, the surface is rougher, more active sites can be provided, and the photocatalytic activity is favorably improved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Phthalic acid derived L-phenylalanine micromolecular gel and preparation method thereof
PendingCN111909052AImprove gel performanceObvious red shiftOrganic compound preparationCarboxylic acid amides preparationHexadecaneDodecane
The invention belongs to the field of gel materials, and particularly relates to phthalic acid derived Lphenylalanine micromolecular gel and a preparation method thereof.The preparation method includes the following steps that 1, adding Boc protected Lphenylalanine, HOBt, long-chain amine and NEt3 into a flask and stirring the above by dichloromethane, dropwise adding EDCl in an ice bath till thereaction concludes adjusting the pH value to be acidic by using a saturated Na2CO3 solution; (2) concentrating the extracted organic phase, and carrying out column chromatography separation; (3) adding TFA and dichloromethane into the obtained product, dissolving and stirring; and (4) after extracting and spin-drying, adding phthalic anhydride, dissolving with acetone, stirring, and recrystallizing to obtain the target product. The invention has high mechanical strength, can effectively balance or avoid the bonding or destroying capacity of a proton solvent in the solvent to a gel, and has good gelling capacity to non-polar organic solvents such as diesel oil, paraffin, decane, dodecane, tetradecane, cetane and the like.
Owner:LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
Ge-Sb micropore sulfide with ion exchange performance, preparation method and usage thereof
InactiveCN101676032AObvious red shiftCation exchanger materialsWater/sewage treatment by ion-exchangeTetragonal crystal systemIon exchange
The invention relates to a Ge-Sb micropore sulfide with the ion exchange performance, a preparation method and the usage thereof. The sulfide has the chemical formula of (Me2 NH2)2 Sb2 GeS6 and the molecular weight of 600.64, belonging to tetragonal crystal system; and the space group is P4<1> 2<1>2, and the unit cell parameters comprise: a= b= 10.988 (3), c=13.811 (5)*, alpha=90 degrees, beta=90degrees, gamma=90 degrees, V=1667.6 (9) *<3>, and z=4. The material is synthesized by a solvent thermal method. The Ge-Sb micropore sulfide has excellent ion exchange performance for ions such as Cs<+>, Rb<+>, K<+> and Na<+> in water solution, and has strong ion exchange capability and high selectivity especially for the Cs<+>. The invention has important significance for removing radioactive elements in nuclear waste liquid and develops a new ion exchanger for treating the nuclear waste liquid.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Self-assembly substance based on brush-like block polymer and synthesis method and application thereof
The invention discloses a self-assembly substance based on a brush-like block polymer and a synthesis method and application thereof. The method for synthesizing the self-assembly substance comprisesthe following steps: uniformly dispersing the brush-like block copolymer PNBPM-b-PNDM in tetrahydrofuran, coating the mixed solution on a glass slide, and performing solvent evaporation at room temperature to obtain a polymer film. The self-assembly substance makes photonic crystal materials can be applied to light sensors, light valves, pigments, dyes and other aspects, and has great practical value.
Owner:TIANJIN UNIV
Rare-earth-based light absorption material and preparation method and application thereof
InactiveCN108557862AReduce harmEasy to operateRare earth metal oxides/hydroxidesOptical elementsUltraviolet lightsCerium
The invention relates to a rare-earth-based light absorption material and a preparation method and application thereof. The rare-earth-based light absorption material is a lanthanum doped cerium oxidematerial and can absorb blue light and ultraviolet light in visible light, and the absorption threshold of the rare-earth-based light absorption material is 490 nanometers. The preparation method issimple, practicable, low in cost and capable of achieving large-scale production. The rare-earth-based light absorption material has the advantages that the rare-earth-based light absorption materialcan absorb electromagnetic waves of 200-490 nanometers, the powered material can effectively absorb the blue light and ultraviolet light in the visible light, and the material can be used as the absorbent of blue light and ultraviolet light to be applied to coating, skincare products and the manufacturing field of products such as screens and glass.
Owner:NORTHEASTERN UNIV
Garnet-type aluminosilicate phosphor, preparation method thereof, and light-emitting device comprising same
ActiveCN107880885BImprove quantum efficiencyExcellent thermal quenching performanceLuminescent compositionsSemiconductor devicesPhysical chemistryLight excitation
The invention discloses garnet-form aluminosilicate fluorescent powder. The chemical formula of the garnet-form aluminosilicate fluorescent powder is (Lu1-x-yLnxCey)aMgbAlcSidOe, wherein a is more than or equal to 1.8 and less than or equal to 2.2, b is more than or equal to 1.8 and less than or equal to 2.1, c is more than or equal to 1.8 and less than or equal to 2.2, d is more than or equal to1.8 and less than or equal to 2.1, e is more than or equal to 1.8 and less than or equal to 2.2, Ln represents one or more of Sc, Y, Gd and La in any proportion, x is more than or equal to 0 and lessthan or equal to 0.15, and y is less than or equal to 0.08. The prepared fluorescent powder has a crystal structure of yttrium aluminum garnet, can be optically excited by light with a wave length less than 520nm and can emit visual light with a peak value from 560nm to 590nm. Besides, the invention further discloses a preparation method of the fluorescent powder and a light-emitting device including the fluorescent powder.
Owner:GRIREM ADVANCED MATERIALS CO LTD
Method for preparing organo-silicon polymer luminescent material and application of organo-silicon polymer luminescent material to OLED device
InactiveCN108727596AControl thicknessSimple manufacturing processLuminescent compositionsPolymer scienceFluorescence
The invention provides a method for preparing an organo-silicon polymer luminescent material and application of the organo-silicon polymer luminescent material to an OLED device, and relates to an organic luminescent material. Powdered PCS and 9-vinyl anthracene which are obtained through grinding are separately dissolved in xylene, and a catalyst is added to the 9-vinyl anthracene xylene solution; after activation, the PCS solution and the 9-vinyl anthracene solution are mixed and placed in a container; a heating program is set, heat preservation is carried out under the protection of an inert gas atmosphere, a reaction is carried out, and the whole system is naturally cooled to room temperature after the reaction ends; the mixed solution after the reaction is subjected to negative-pressure rotary distillation to remove the solvent and obtain a canary yellow solid, and then the solid is dried to obtain the organo-silicon polymer luminescent material. The relative molecular mass of a PCS molecule is increased, the conjugated system is enlarged, the fluorescence emission performance is enhanced, and in combination with the characteristics of PCS which is easy to form a film and is flexible, the application problems of difficult film formation and easy aggregation and crystallization of anthracene can be effectively solved.
Owner:XIAMEN UNIV
Thiophene-containing conjugate organo-boron polymer and preparation method therefor
The invention discloses a thiophene-containing conjugate organo-boron polymer and a preparation method therefor. The target compound is obtained through subjecting a 2,5-diboro-1,4-phenylacetylene unit and a 2,5-thiophene diiodide unit, which serve as raw materials, to Sonogashira coupling in the presence of tetra(triphenylphosphine)palladium and cuprous iodide in a manner of taking tetrahydrofuran as a solvent and taking diisopropylamine as alkali. The invention belongs to the technical field of functional organic semiconductor materials, particularly unique properties of the thiophene-containing conjugate organo-boron polymer are decided by electron deficiency of boron and empty p-orbit, a boron monomer has strong bluish green light emission in a solution, and strong yellow light emission is obtained in the solution through being coupled to thiophene. The thiophene-containing conjugate poly-boron organic compound synthesized by the method can be applied to luminescent materials, thereaction conditions are mild, the process is simple in operation, short in production cycle and low in cost and is environmentally friendly, and the product has relatively high stability in air.
Owner:NORTHWEST NORMAL UNIVERSITY
Imidazole tri-acylhydrazone compound, application of compound as organic light-emitting material as well as preparation method of compound
ActiveCN105061320AReduce coplanarityImprove practicalityOrganic chemistryLuminescent compositionsChemical compoundFluorescence sensing
The invention discloses an imidazole tri-acylhydrazone compound shown in formula I, an application of the compound as an organic light-emitting material as well as a preparation method of the compound. Four functional structure units, namely, an imidazole group, an acylhydrazone group, a diarylethene group and a naphthyl group, are effectively combined in one molecule, and a novel multi-functional-group imidazole tri-acylhydrazone organic light-emitting molecule is formed. The preparation method of the light-emitting material comprises steps as follows: (1) preparation of an intermediate, namely, imidazole trimethyl tricarboxylate; (2) preparation of an intermediate, namely, imidazole trimethyl hydrazide; (3) preparation of a target product, the imidazole tri-acylhydrazone. The preparation method is simple and comprises few synthesis steps, raw materials are easy to obtain, the cost is low, and purification and industrialization are easy. The imidazole tri-acylhydrazone compound is stable in structure and easy to store and shows stronger fluorescence emission under solution and solid states. The light-emitting material is good in stability and can be applied to fields of light-emitting devices, fluorescence sensing and the like.
Owner:INST OF ANALYSIS GUANGDONG ACAD OF SCI (CHINA NAT ANALYTICAL
Dual-core ionic iridium coordination compound and uses thereof
InactiveCN104860998AGood discoloration propertiesObvious red shiftIndium organic compoundsFluorescence/phosphorescenceDichloromethaneIridium
The present invention discloses a dual-core ionic iridium coordination compound, which is a novel organic light-emitting material concurrently having pressing discoloration and aggregation inducing, wherein the molecular formula is C54H34F20Ir2N12P2, the relative molecular mass is 1678.14 g / mol, and the coordination compound melting point is 315 DEG C. The preparation method comprises: adding 2-fluorophenyl pyrazole dichlorendic and a ligand bpba to a round bottom flask in a mixing manner according to a ratio of 1:(1.0-1.5), adding equal amounts of methanol and dichloromethane as a solvent to the flask, carrying out dark stirring reflux for 4 h under the protection of nitrogen gas at a temperature of 78 DEG C, cooling to a room temperature after completing the reaction, adding potassium hexafluorophosphate, stirring for 1 h, and filtering to obtain orange solid powder [(2Fppz)2Ir-(bpba)-Ir(2Fppz)2]2PF6. The dual-core ionic iridium coordination compound of the present invention can be used in organic gas sensors.
Owner:NORTHEAST NORMAL UNIVERSITY
Design of an Asymmetric Circular Cavity Filter Based on Surface Plasmons
ActiveCN108736118BObvious red shiftBandwidthWaveguide type devicesResonant cavityRectangular aperture
The invention discloses design of a surface plasmon-based asymmetric structure circular cavity filter. A metal-dielectric-metal asymmetric structure filter is constructed by adopting a caliber coupling method; and two circular resonant cavities are connected with optical waveguide through two rectangular apertures. In the embodiment of the invention, a metal thin film is made of a metal silver material, and the metal thin film is integrally square. The resonance coupling effect of the surface plasmon SPP and the resonant cavity is utilized; and the method has the characteristic that the size of the radius of the resonant cavities and the number of the resonant cavities and the like are adjusted, so that the stop band of the filter can be remarkably increased, the stop band is flat, and thetransmission rate is extremely low.
Owner:GUILIN UNIV OF ELECTRONIC TECH
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