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65 results about "Eosin Y" patented technology
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Eosin Y also called C.I. 45380 or C.I. Acid Red 87, is the form of eosin most commonly used in histology, most notably in the H&E (Haematoxylin and Eosin) stain. Eosin Y is also widely used in the Papanicolaou stain (or Pap stain used in the Pap test) and the Romanowsky type cytologic stains.
Catalyst for generating hydrogen by visible light photocatalytic reduction of water, and preparation method thereof
InactiveCN102039131AHigh hydrogen production activityAchieve non-platinizationHydrogen productionMetal/metal-oxides/metal-hydroxide catalystsCarbon nanotubeCopper oxide
The invention provides a catalyst for generating hydrogen by visible light photocatalytic reduction of water, and a preparation method thereof, wherein each 100mg of the catalysts contain 10-60mg of eosin-Y, 35-85mg of carbon nano tubes and 1-10mg of oxides. With the technical scheme of the invention, the eosin is used as a sensitizing agent, the carbon nano tubes are used as carriers and photogenerated electron channels, the oxides, such as copper oxide, are used as co-catalysts, so that hydrogen generation by visible light photocatalytic reduction of water is implemented. The catalyst has higher hydrogen generation activity under irradiation of the visible light, and can be used for generating hydrogen by visible light photocatalytic reduction of water. And the oxides substitute Pt to be used as the co-catalyst, thereby implementing non-platinum property of the catalyst.
Owner:EAST CHINA UNIV OF SCI & TECH
Method for preparing 2-iodine amyl -2-ene-1,4-diketone derivative by adopting visible light catalysis
ActiveCN107011145AMild reaction conditionsEasy to operateOrganic compound preparationCarboxylic acid esters preparationIodidePollution
Owner:ZHEJIANG UNIV OF TECH
Method for detecting melamine
The invention discloses a method for detecting melamine. The method comprises the following steps of: sequentially adding 0.05-5.0mL of 0.1-0.5g / L melamine solution, 1.0-2.5ml of 4.0*10<-6>mol / L eosin Y-solution, 0.5-1.0ml of 2.0*10<-4>mol / L neutral red solution and 0.3-1.0ml of Britton-Robinson buffer solution of which the pH value is 3.5 into a 10ml colorimetric tube, using the solution without melamine as the reagent blank, fixing the volume to a specific scale by using super-pure water, reacting for 30min in a water bath of 30 DEG C, subsequently respectively measuring the fluorescence value F538nm of the melamine-containing solution and the fluorescence value F0 of the reagent blank and calculating the difference value that deltaF538nm is equal to F538nm subtracted by the F0 value at 538nm on a fluorophotometer by using a 1cm quartz cuvette in a mode that 520nm is used as the excitation wavelength; preparing 30ml of milk, adding 20.0ml of 1% trichloroacetic acid solution and 8.0ml of 2% lead acetate solution, and carrying out ultrasound treatment for 20min; centrifuging a part of the solution for 10min, taking 1ml of the supernate, and measuring the fluorescence value and calculating the content of the melamine in the milk according to the same way. The method is simple, convenient and rapid.
Owner:内蒙古兰格格乳业有限公司
Method using visible light catalyzed cross-coupling reaction to prepare coupling product and release hydrogen
ActiveCN103833729AMild reaction conditionsFacilitate mechanism researchHydrogen productionPhosphorus organic compoundsElectron donorSolvent
The invention discloses a method using visible light catalyzed cross-coupling reaction to prepare a coupling product and release hydrogen. The method is as follows: a tertiary amine, a nucleophile, a cobalt complexe 1 or a cobalt complexe 2 and eosin Y are added into a solvent to obtain a mixed solution, and under the protection of an inert gas, visible light is used to irradiate the mixed solution to obtain the cross-coupling product of the tertiary amine and the nucleophile and release the hydrogen. The reaction can be achieved by visible light irradiation in the presence of the inert gas, and is mild in reaction conditions, the whole system is free of externally-applied electron donors or acceptors, and the method is energy-saving and environmentally-friendly.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Cell staining reagent and preparation method and application thereof in cell staining
ActiveCN101560543AImprove accuracyMicrobiological testing/measurementPreparing sample for investigationMethanolEthanol
The invention provides a cell staining reagent, comprising B.S liquid, staining liquid, rinsing liquid, and EA50 staining liquid; wherein per 400ml of B.S liquid consists of 320.0ml of methanol, 60.0ml of formol and 20.0ml of acetic acid glacial; per 210ml of staining liquid comprises 100.00mg of thiohydrazine, 87.0mg of tert-butanol liquid, 5.2ml of hydrochloric acid with the concentration of 5mol / L, 1800mg of sodium bisulfite, and the balance of distilled water; per 200ml of rising liquid comprises 1.0g of sodium metabisulfite, 2.0ml of hydrochloric acid with the concentration of 5mol / L, and 198.0ml of distilled water; per 600ml of EA50 staining liquid comprises 15ml of purified water, 0.3g of bright green, 2g of water soluble eosin Y, 450ml of ethanol with volume percent of 95 percent, 125ml of pure methanol, 10ml of glacial acetic acid, and 1g of phosphotungstic acid. The invention further provides the preparation method and the application of the cell staining reagent in cell staining.
Owner:MOTIC XIAMEN MEDICAL DIAGNOSTICS SYST
Fluorescence digital imaging microscopy system
InactiveUS20020191824A1High degreeIncrease rangeMicrobiological testing/measurementPreparing sample for investigationDigital imagingEosin
A method of preparing cell samples for viable cell number quantification with a fluorescence digital imaging microscopy system employing digital thresholding technique. The cell sample is stained with a first, fluorescent dye and treated with a second dye that is able to quench the fluorescence of the first dye. The fluorescent dye accumulates in viable cells only and is used to stain the viable cells. The second dye is excluded from viable cells but enters non-viable cells, thereby quenching the background fluorescence in non-viable cells and the medium. Two examples of dye combinations are described: fluorescein diacetate used as the fluorescent dye with eosin Y as the quenching dye; and calcein-AM used as the fluorescent dye with trypan blue as the quenching dye. By reducing the background fluorescence, the dynamic range and accuracy of viable cell number measurements are enhanced. In low viability cultures treated with fluorescein diacetate, background fluorescence completely masked viable cells, but digital thresholding and eosin treatment dramatically reduced background fluorescence, producing a linear response over 4 logs of viable cell density.
Owner:CHILDRENS HOSPITAL OF LOS ANGELES
Method for synthesizing vinyl sulfone compound
InactiveCN107176915AReduce usageNo pollution in the processOrganic chemistryOrganic compound preparationSulfonyl chlorideChromatographic separation
The invention relates to a method for synthesizing a vinyl sulfone compound. The vinyl sulfone compound has a chemical molecular formula shown in the description, wherein R1 is one selected from H, a straight-chain alkyl electron-donating group, a nitro electron withdrawing group, F, Cl and Br, and R2, R3 and R4 each is selected from H and straight-chain alkyl. The synthetic method comprises the steps of adding an inorganic base in an organic reaction solvent by taking an aryl sulfonyl chloride compound and a tertiary amine compound as reaction substrates and taking eosin Y as a catalyst under the action of visible light, carrying out a reaction for 1 to 3 hours at the temperature of -5 DEG C to 5 DEG C under the irradiation of an LED (light-emitting diode) lamp, carrying out water washing treatment, extraction and drying after the reaction ends, then, carrying out reduced-pressure distillation to remove the organic solvent, and then, carrying out thin-layer chromatography and column chromatography separation, thereby preparing the vinyl sulfone compound. Compared with the prior art, the method provided by the invention has the advantages that the steps are simple, the reaction conditions are mild, the controllability is good, the consumption of metal complexes is avoided, the reaction cost is reduced, and the method is pollution-free to environments.
Owner:TONGJI UNIV
Light and thermal controlled nano supermolecule vesicle as well as preparation method and application thereof
InactiveCN104473902AEasy to prepareImprove responsivenessOrganic active ingredientsEnergy modified materialsSupermoleculeThermal control
The invention relates to a light and thermal controlled nano supermolecule vesicle. In a construction unit of the light and thermal controlled nano supermolecule vesicle, sulphonated calyx arene is taken as a host, amphiphilic anthracene ether (AnPy) is taken as a guest, and a supramolecular assembly is constructed under the action of supermolecules. A preparation method of the light and thermal controlled nano supermolecule vesicle comprises the following steps: dissolving sulphonated calyx arene and amphiphilic anthracene ether in water respectively, and uniformly mixing to obtain light and thermal controlled nano supermolecule vesicle solution, wherein concentrations of sulphonated calyx arene and amphiphilic anthracene in the nano supermolecule vesicle solution are 0.04mM and 0.10mM respectively. The light and thermal controlled nano supermolecule vesicle has the advantages that the preparation method of the nano supermolecule vesicle is simple, and cost is low; the prepared supermolecule vesicle has good responsibility in a short time by means of external temperature and ultraviolet irradiation, and the supermolecule vesicle can be depolymerised by means of visible light irradiation after being mixed with a photodynamic therapy model drug Eosin Y, so that the light and thermal controlled nano supermolecule vesicle has a broad application prospect in the field of loading, transportation and controlled release of photodynamic therapy drugs.
Owner:NANKAI UNIV
Catalyst for hydrogen production
InactiveCN102218322AAchieve non-platinizationSolve substitution problemsHydrogen productionMetal/metal-oxides/metal-hydroxide catalystsAir atmosphereCarbon nanotube
The invention discloses a catalyst for hydrogen production and a preparation method thereof. In the catalyst for hydrogen production, eosin is used as a sensitizing agent, a carbon nano-tube is used as a carrier and a photoinduced electron channel, and a copper-based composite metal oxide is used as a catalyst promoter. The preparation method comprises the following steps of: mixing the carbon nano-tube and a metal saline solution, adding water, stirring for several hours, and evaporating water to dryness so as to obtain a carbon nano-tube and metal saline precursor; at the air atmosphere, calcining the precursor for hours so as to obtain a carbon nano-tube and copper-based composite metal oxide system; and soaking the carbon nano-tube and copper-based composite metal oxide system in an aqueous solution containing eosin Y under the protection of N2, and separating to obtain the catalyst for hydrogen production. Under the irradiation of visible light, the catalyst has higher hydrogen production activity and can be used for producing hydrogen by catalyzing and reducing water in visible light. The copper-based composite metal oxide can be used for replacing Pt to server as the catalyst promoter so that the non-platinization of the catalyst is realized; and therefore, the catalyst has a certain application value in the aspect of hydrogen production by reducing water through photocatalysis.
Owner:EAST CHINA UNIV OF SCI & TECH
Preparation method of 3,3'-diindolyl acetate
A 3,3'-diindolyl acetate compound and a derivative thereof are discovered to have extensive activities of immunity resistance, inflammation resistance, edema inhibition and the like. Meanwhile, The 3,3'-diindolyl acetate compound is also an important intermediate raw material which belongs to the field of organic preparation. The compound can be used for synthesizing multiple bioactive molecules with 3,3'-bis-indolymethane structure, and has quite high organic synthesis application value. The invention provides a quite simple preparation method of a visible light catalyzed 3,3'-diindolyl acetate compound. The preparation method comprises the following specific steps: taking a glycine derivative and an indole derivative as raw materials, taking an organic photosensitizer (eosin Y, rose-bengal or rhodamine 6G) as a photocatalyst, reacting for 10-30 h at the room temperature under illumination of visible light, and separating and purifying to obtain a product. Compared with the prior art,the preparation method has the advantages of simple steps, high yield, cheap and easily obtained raw materials and catalysts, zero metal, mild reaction condition, simplicity in reaction operation andthe like, and is more suitable for pilot scale-up and large-scale preparation of the 3,3'-diindolyl acetate compound.
Owner:LANZHOU UNIVERSITY
Chemical sensitivity screening test
ActiveUS20160169872A1Analysis using chemical indicatorsMaterial analysis by observing effect on chemical indicatorBoron trioxideErythrosine
The present document describes a screening composition comprising a marker compound, chosen from at least one of iodine, and fluorescein; eosin Y, erythrosine, ponceau S, calcein, a catalyst, chosen from at least one boron trioxide (B2O3), potassium (K), Gallium (III) oxide (Ga2O3), Nickel (II) oxide (NiO), Vanadium (V) oxide (V2O5), magnesium oxide (MgO), a bismuth oxide chosen from bismuth subcarbonate [Bi2O2(CO3)], bismuth chloride oxide (BiClO), and bismuth oxide (Bi2O3), cesium bromide (CsBr), lanthanum (III) oxide (La2O3), molybdenum (VI) oxide (MoO3), neodymium oxide (Nd2O3), Nickel (II) carbonate anhydrous (NiCO3); and a pigment, chosen from at least one of scandium (III) oxide (Sc2O3), Lead (IV) oxide (PbO2), Sulfur (S) powder, and Tungsten (VI) oxide (WO3), chromium (III) oxide (Cr2O3), copper (II) oxide (CuO), copper (I) oxide (Cu2O), iron (III) oxide (Fe2O3), lead (II) oxide (PbO). The document also describes method of using the same.
Owner:BRYSON PATENTS
Preparation method for 3-sulfo-indoles compound
InactiveCN107382819AAdverse effect on performancePerformance impactOrganic chemistryOrganic synthesisRaw material
The invention relates to the technical field of organic synthesis and provides a preparation method for a 3-sulfo-indoles compound. The 3-sulfo-indoles compound is acquired through the substitution reaction of thiophenols compound and indoles compound under the photo-catalytic effect of photo-catalyst and organic solvent, wherein the photo-catalyst comprises one or more of eosin B, eosin Y and rose bengal. According to the preparation method provided by the invention, the reaction condition is mild, no alkali or oxidizing agent is required, no transition metal catalyst participates into the reaction, the adverse effect of the metal residue to the product performance is effectively avoided, the product performance is promoted, the product yield is increased to 70%, the multi-step synthesis of the reaction raw materials is not required and the technological process is simplified.
Owner:GANNAN NORMAL UNIV
Detection methods of proteins on polyacrylamide gels using gel background staining and organic dye compositions for the same
Disclosed are a method for detecting proteins on a polyacrylamide gel by background staining method using an organic dye composition containing eosin Y or phloxine B, and the organic dye composition for use in the method, which enables the rapid and simple detection of the protein on the polyacrylamide gel with a high sensitivity.
Owner:IND FOUND OF CHONNAM NAT UNIV
Systems and Methods for Transdermal Photo-Polymerization
InactiveUS20090259166A1Easy to useWavelength is limitedCosmetic preparationsElectrotherapyMedicineHand held
Systems and methods of polymerizing compositions with a light source may be provided. A device may include a handheld light source, which may include an LED, which may provide light at limited wavelengths to polymerize a composition. The device may be used to photo-polymerize dermal fillers transdermally via ex vivo applications. Dermal fillers may be compositions including PEODA 3400 and eosin Y, which may be polymerizable when exposed to light.
Owner:KYTHERA BIOPHARMLS INC
Reagent kit for screening early-stage cervical cancers based on cervical liquid-based cytology and DNA methylation
ActiveCN105177168AStrong specificityEasy to exploreMicrobiological testing/measurementLiquid base cytologyForward primer
The invention discloses a reagent kit for screening early-stage cervical cancers based on cervical liquid-based cytology and DNA methylation. The reagent kit comprises orange-G6, brilliant green liquid, Bismarck brown liquid, eosin Y liquid, a QlAamp DNA Mini Kit reagent kit body, a QIAamp EpiTect Bisulfite Kits reagent kit body and PCR reaction liquid, the forward primer sequence of JAM3-M4 is shown as SEQ ID No.6, the reverse primer sequence of JAM3-M4 is shown as SEQ ID No.7, the forward primer sequence of beta-actin is shown as SEQ ID No.16, the reverse primer sequence of beta-actin is shown as SEQ ID No.17. According to the reagent kit for screening the early-stage cervical cancers, detection flexibility, specificity, the positive predictive value and the negative predictive value meet the requirements of clinical diagnosis through primary verification of clinical tissue samples and further verification of a large amount of cervical exfoliated cytology.
Owner:SHANDONG UNIV QILU HOSPITAL
Preparation method of high-conductivity graphene-eosin Y composite aerosol photocatalyst
ActiveCN108043457AImprove conductivityExperiment operation is simpleWater/sewage treatment by irradiationCarbon compoundsNitrobenzeneEosin Y
The invention discloses a preparation method of a high-conductivity graphene-eosin Y composite aerosol photocatalyst. The high-conductivity graphene-eosin Y composite aerosol photocatalyst is preparedby: adding certain high-conductivity Elicarb graphene into graphene oxide-eosin Y solution, performing hydrothermal treatment, and lyophilizing. When exposed to visible light, high-conductivity graphene-eosin Y composite aerosol exhibits excellent photocatalytic activity in liquid photocatalytic reduction nitrobenzene and Cr (VI); the preparation method is simple and effective to perform and hasgood practical value and promising application prospect in the preparation of more effective graphene-aerosol composite photocatalysts.
Owner:FUZHOU UNIV
Anti-stacking nitrogen doped three-dimensional graphene and preparation method thereof
InactiveCN106732732AHigh catalytic efficiencyImprove stabilityHydrogen productionHydrogen/synthetic gas productionPhotocatalytic water splittingNitrogen gas
The invention discloses anti-stacking nitrogen doped three-dimensional graphene and a preparation method thereof. The preparation method comprises the following steps: hydrothermally preparing anti-stacking graphene oxide by using melamine, a formaldehyde aqueous solution with a concentration of 37wt% and a graphene oxide aqueous solution; and calcining the prepared anti-stacking graphene oxide under a nitrogen atmosphere so as to be able to obtain the anti-stacking nitrogen doped three-dimensional graphene. According to the invention, the catalyst has good eosin Y sensitized photocatalytic water-splitting hydrogen production activity after loaded with precious metal PT with a mass ratio of 10% under illumination of visible light; and the preparation method is simple and practicable, and the catalyst is cheap and can be conveniently recycled, so the composite photocatalic material has extensive practicable values and application prospects in the technical files of material preparation and the field of photocatalytic water-splitting hydrogen production.
Owner:FUZHOU UNIV
Preparation method of indolizine cyclo-1, 2-diketone with fluorescence activity and derivative thereof
ActiveCN111269228AHigh regional selectivityEasy to operateOrganic chemistryLuminescent compositionsOrganic synthesisCatalytic oxidation
The invention belongs to the field of organic synthesis, and particularly relates to a preparation method of indolizine cyclo-1, 2-diketone with fluorescence activity and a derivative thereof. The indolizine cyclo-1, 2-diketone is prepared by adopting a new metal-free photocatalytic oxidation method, and the indolizine cyclo-1, 2-diketone is synthesized from commercially available indolizine, 2-oxo-2-phenylacetaldehyde, rose bengal and other basic raw materials, wherein the groups R1, R2 and R3 are alkyl, an electron withdrawing group or an electron donating group; rose bengal can also be replaced with a photocatalyst eosin Y, eosin B, rhodamine 6G or fluorescein; the solvent dimethyl sulfoxide can also be replaced with an organic solvent N, N-dimethylformamide, acetonitrile or dichloromethane. The method has the characteristics of easily available starting materials, wide substrate application range, economy, high efficiency, mild conditions, environmental friendliness and high yield.
Owner:山东中新科农生物科技有限公司
Diff-Quik dye liquor special for animals and preparation method thereof
PendingCN111624065ANo sedimentDyeing color is clearPreparing sample for investigationMaterial analysis by optical meansAnimal scienceStaining
The invention discloses a Diff-Quik dye liquor special for animals and a preparation method of the Diff-Quik dye liquor. The Diff-Quik dye liquor comprises a first reagent, a second reagent and a third reagent; the first reagent contains the following components: solid green and methanol; the second reagent contains the following components: eosin Y, monopotassium phosphate, disodium hydrogen phosphate dodecahydrate and ultrapure water; and the third reagent contains the following components: methylene blue, azure II, azure I, eosin Y, monopotassium phosphate, disodium hydrogen phosphate dodecahydrate, potassium permanganate and ultrapure water. The Diff-Quik dye liquor is suitable for animal blood cell smears, the staining color is very clear, the staining background is free of sediment,the color is bright, the distinction degree is high after staining of different cells, and the application range is wider; compared with the existing Diff-Quik dye liquor, the Diff-Quik dye liquor disclosed by the invention has more advantages in dyeing time, and dyeing can be generally completed within 30 to 60 seconds. And the Diff-Quik dye liquor disclosed by the invention is extremely short inpreparation time, so that the production benefit is remarkably improved.
Owner:嘉兴优瑞生物科技有限公司 +1
Cytoplasmic stain composition
InactiveUS20140248658A1Accurate stainingLess hazardousPreparing sample for investigationBiological testingPHLOXINE BCytology
A composition of two cytoplasm stains for use in differentiation of cell nuclei from cell cytoplasmic components and differentiation of specific cytoplasm components by tinctorial contrast. Specifically, the invention relates to two stain compositions utilized as a counter stain in the hematoxylin and eosin procedure for use in histological and cytological microscopic evaluation of tissue and cells. In one embodiment, the composition includes eosin-Y as the sole dye in the composition, and a propylene glycol solvent and an organic buffer. In another embodiment, the composition includes a mixture of eosin-Y and phloxine-B as the sole dye, also in a propylene glycol solvent and an organic buffer.
Owner:HCI SCI
3-imidazole[1,2-a]pyridine compound
The invention discloses a 3-imidazole(1,2-a)pyridine compound which is prepared by an oxidation cross-coupling reaction of a visible-light photocatalytic N-aryl glycine ester and a imidazo(1,2-a)pyridine compound. In the preparation method, eosin Y serves as a photosensitizer, citric acid serves as an additive, and N-aryl glycine ester and imidazo(1,2-a)pyridine compound are directly dehydrogenated and cross-linked to form 3-imidazole(1,2-a)pyridine compound in an organic solvent at room temperature after being irradiated by visible light. Accoding to the preparation method, eosin Y serves asphotosensitizer, citric acid monohydrate serves as additive, ethanol serves as solvent, and the 3-imidazole(1,2-a)pyridine compoundand is effectively prepared by visible light photocatalysis at room temperature. The method has the advantages of simple operation, mild reaction conditions, good selectivity and atomic economy.
![3-imidazole[1,2-a]pyridine compound](https://images-eureka.patsnap.com/patent_img/81ea2cf8-e9b4-447f-9c38-f6adc0c1509a/FDA0001988810870000011.png "3-imidazole[1,2-a]pyridine compound")
![3-imidazole[1,2-a]pyridine compound](https://images-eureka.patsnap.com/patent_img/81ea2cf8-e9b4-447f-9c38-f6adc0c1509a/FDA0001988810870000012.png "3-imidazole[1,2-a]pyridine compound")
![3-imidazole[1,2-a]pyridine compound](https://images-eureka.patsnap.com/patent_img/81ea2cf8-e9b4-447f-9c38-f6adc0c1509a/BDA0001988810880000011.png "3-imidazole[1,2-a]pyridine compound")
Owner:EAST CHINA UNIV OF TECH
Rapid developing agent for biological traces
ActiveCN108195809AQuick and effectiveImprove completenessTransportation and packagingMixer accessoriesMulti bandSemen
The invention discloses a rapid developing agent for biological traces and a preparation method of the rapid developing agent. The rapid developing agent is composed of the following raw materials: afluorescent substance, ninhydrin, lanthanum oxide, silver nitrate, polyether F68 and ethanol; pH of the rapid developing agent for biological traces is 4.5-6.5; the fluorescent substance is eosin Y, fluorescein or calcein. The rapid developing agent for biological traces provided by the invention can fast develop a fingerprint, can naturally develop the fingerprint within 30 seconds without a developing box or a developing instrument, is simple and convenient to operate during use, is packaged in a spray tank, and is used for spraying a detection object; the developed fingerprint is visible tonaked eyes without using other expensive optical instruments, such as laser or multi-band light source; the rapid developing agent for biological traces provided by the invention is used widely, notonly can develop human fingerprints, but also has a rapid developing function for body fluids secreted by a human body such as saliva, blood, urine, semen stains and female secretions.
Owner:刘红兵
Method for preparing trifluoro-methylmercapto-substituted indole compound
InactiveCN106748608AChemically stableLow toxicityMercapto/sulfide group formation/introductionSulfonateEosin Y
The invention discloses a method for preparing a trifluoro-methylmercapto-substituted indole compound. The method comprises the following step: by taking trifluoro-methyl sodium sulfonate as a trifluoro-methylmercapto source and triphenylphosphine as a reducing agent, under the action of a visible light catalyst eosin Y, and enabling a substituted indole compound, the trifluoro-methyl sodium sulfonate and triphenylphosphine to react with N-chloro-o-phthalimide, thereby obtaining the trifluoro-methylmercapto-substituted indole compound. The method disclosed by the invention is simple, a trifluoro-methylmercapto reagent used in the method is low in toxicity, and no heating is needed in the preparation process, so that the energy can be saved, the environment can be protected, and direct trifluoro-methylmercapto reaction of a 3-position C (sp2)-H bond of an indole compound is achieved.
Owner:NANJING UNIV OF SCI & TECH
Ultrathin two-dimensional nickel phosphide nano-sheets as well as preparation and application thereof to photocatalytic hydrogen production
ActiveCN108855160APromote sustainable developmentImprove photocatalytic efficiencyPhysical/chemical process catalystsHydrogen productionDecompositionGas phase
The invention discloses an ultrathin two-dimensional nickel phosphide nano-sheet material as well as preparation and application thereof to photocatalytic hydrogen production. The preparation comprises the following steps: firstly, preparing an ultrathin nickel hydroxide (Ni(OH)2) precursor through a solvothermal method; dispersing the synthetic (Ni(OH)2 on single-layer graphene (FGR) through an electrostatic self-assembling method; finally, synthesizing an ultrathin two-dimensional Ni2P nano-material through a gas-phase and solid-phase phosphatization method. Under the irradiation of visiblelight, the catalyst has good eosin Y sensitized water decomposition and hydrogen production activity and stability. The preparation method is simple and can realize batch production; reaction conditions are moderate, and efficient separation and recycling, and repeated utilization can be realized; a compound catalytic material has important actual application value in the technical field of material preparation and the aspect of water decomposition and hydrogen production; sustainable development of environments and energy sources is facilitated.
Owner:FUZHOU UNIV
Method of synthesizing 8-hydroxyquinoline
ActiveCN109053569APrevent self-aggregationPrevent volatilizationOrganic chemistryDehydrogenationSolvent
The invention discloses a method of synthesizing 8-hydroxyquinoline. Ortho-aminophenol and acrolein are used as raw materials, and hydroquinone is used as a polymerization inhibitor; an addition reaction and a cyclization reaction are carried out under the acidic condition to obtain an intermediate, and a cobalt oxime chelate photocatalyst and an eosin Y photosensitizer are directly added withoutthe need of separation of the intermediate; and an acetonitrile solvent and deionized water are added, under continuous irradiation of visible light, the 8-hydroxyquinoline is obtained through a photocatalytic dehydrogenation oxidation reaction. The reaction process is easy to control, by-products are few, post-treatment is simple, and the generated target product is good in selectivity, high in yield and stable.
Owner:连云港德洋化工有限公司 +1
Eosin Y based electrochemiluminescence sensor
InactiveCN105929010AStable and sensitive electrochemiluminescenceEfficient detectionChemiluminescene/bioluminescenceMaterial electrochemical variablesVitamin CPhosphoric acid
The invention discloses an eosin Y based electrochemiluminescence sensor. In the sensor, an oxidized glass-carbon electrode is taken as the work electrode, eosin Y is taken as the electrochemiluminescence substance, a phosphoric acid buffer solution is taken as the electrolyte buffer system, and thus high sensitive sensing of bioactive molecules such as hydrogen peroxide, guanine, adenine, NADH, uric acid, vitamin C, and the like, is realized. A glass-carbon electrode is processed by an electrochemical method to obtain the oxidized glass-carbon electrode. Under the assistance of the oxidized glass-carbon electrode, eosin Y can give off sensitive and stable electrochemiluminescence radiation signals in the cathode electrochemiluminescence channel (-0.5V). Under same conditions, eosin Y has higher luminescence efficiency, compared with conventional luminescent reagents; and moreover, the sensing system can detect a plurality of bioactive substances high sensitively. The electrochemiluminescence sensor has the advantages of simple preparation, green, environment-friendliness, and low cost, and has a certain application prospect in the field of biomedicine.
Owner:FUJIAN NORMAL UNIV
Preparing method of 2-substituted-1,3-dithiane derivative
The invention belongs to the technical field of organic synthesis, and particularly discloses a preparing method of a 2-substituted-1,3-dithiane derivative. The preparing method comprises the following steps of adding substrate aldehyde, 1,3-dimercaptopropane and catalytic amount Eosin Y into a proper amount of acetonitrile, continuously stirring the mixture, using a blue LED to irradiate the mixture for 3 h at a room-temperature open system, after the reaction is finished, removing organic solvents through rotary evaporation, and then obtaining a product through recrystallization and chromatography. According to the preparing method of the 2-substituted-1,3-dithiane derivative, the yield of the product is high, the conversion rate of the substrate is high, the reaction operation conditions are mild and environmentally friendly, demanding water and oxygen removal operations and devices are not needed, and the reaction can be conducted at the room temperature.
Owner:LANZHOU UNIVERSITY
Circulating tumor cell dyeing kit and use thereof
ActiveCN102980793BAvoid lossSimple and fast operationPreparing sample for investigationPhosphateBovine serum albumin
The invention provides a circulating tumor cell dyeing kit and a use thereof. The circulating tumor cell dyeing kit is suitable for the field of biotechnology and the medical science. The circulating tumor cell dyeing kit comprises a filter, a basophilic dyeing liquid, an eosinophilic dyeing liquid, an isotonic solution and a stationary liquid, wherein the basophilic dyeing liquid, the eosinophilic dyeing liquid, the isotonic solution and the stationary liquid are sub-packaged. The filter comprises a filter membrane having aperture sizes of 8 micrometers. The basophilic dyeing liquid is an eosin Y methanol solution. The eosinophilic dyeing liquid is a phosphate buffer solution containing methlene blue and an azure I. The stationary liquid is a phosphate buffer solution containing paraformaldehyde and bovine serum albumin. The circulating tumor cell dyeing kit has good dying effects, a low cost and short operation time, can be prepared simply, is convenient for operation and greatly improves work efficiency.
Owner:WUHAN YZY MEDICAL SCI & TECH
Method for determining hydroquinone in wastewater by poly eosin Y modified glassy carbon electrode
InactiveCN109342524AEasy to makeGood measurement reproducibilityMaterial electrochemical variablesPower flowLinear relationship
The invention relates to the field of electrochemical analysis, in particular to a method for determining the hydroquinone in the wastewater by the poly eosin Y modified glassy carbon electrode. The eosin Y (EY) is modified to the surface of the glassy carbon electrode (GCE) by electropolymerization method, and a poly eosin Y modified electrode (pEY / GCE) is prepared, which has good electrocatalytic effect on hydroquinone. The electrochemical behavior of hydroquinone on the modified electrode was studied by cyclic voltammetry (CV). In a pH=5 acetate buffer solution, the concentration of hydroquinone showed a good linear relationship with its redox peak current in the range of 5.0x10-10~1.8x10-6mol / L, and the minimum detection concentration is 1.25x10-10mol / L.
Owner:HEZE UNIV
Method for preparing corresponding pyridine compound with 1,4-dihydropyridine compound
The invention discloses a method for preparing a corresponding pyridine compound from a 1,4-dihydropyridine compound. The method comprises the following steps: adding a 1,4-dihydropyridine compound, tetra-n-butyl ammonium salt of eosin Y and potassium carbonate into an organic solvent-water mixed solvent, evenly mixing, and introducing air to react under the irradiation of visible light; and after the reaction finishes, adding ethyl acetate, washing respectively with water and saturated ammonium chloride, removing the inorganic alkali, regulating the system to a slightly acidic state, adding a small amount of activated carbon into the organic phase to remove the pigment, drying with anhydrous sodium sulfate, carrying out centrifugal drying, and recrystallizing to obtain the corresponding pyridine compound. Compared with the prior art, the method disclosed by the method uses oxygen in air, which is cheap, convenient and accessible, as the oxidizer. By using sunlight as the energy, the method is more beneficial to industrial production. By using the catalytic amount of non-metal photocatalyst, the method lowers the synthesis cost and prevents the noble metals from accumulation in drug synthesis.
Owner:LANZHOU UNIVERSITY
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