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67results about How to "Improve selective recognition" patented technology
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Preparation method of fluorescent probe and application of fluorescent probe in aluminum ion detection
InactiveCN105802608AGood choiceHigh sensitivityOrganic chemistryFluorescence/phosphorescenceAluminum IonReflux
The invention provides a preparation method of a fluorescent probe and an application of the fluorescent probe in aluminum ion detection. The fluorescent probe is obtained by virtue of a reaction in a heating reflux manner between 2-hydroxyl-1-naphthaldehyde and carbohydrazide. In the structure of the fluorescent probe provided by the invention, the N atoms on the C=N double bonds are influenced by a photo-induced electron transfer effect, and after the N atoms are combined with aluminum ions, the photo-induced electron transfer effect is inhibited, and planar conjugation is enhanced at the same time; two mechanisms together induce obvious enhancement of fluorescence emission; the fluorescent probe has good selectivity and sensitivity to the aluminum ions. High-selectivity identification of the aluminum ions is realized, a relatively good linear relation exists in a range of 5*10<-6> to 4*10<-5> mol / L, and the limit of detection is as low as 1.89*10<-8> mol / L, so that the fluorescent probe has a chromogenic sensing function.
Owner:WENZHOU MEDICAL UNIV
Method for preparing Y2O3:Tb<3+>@SiO2-NH2 fluorescence sensor array used for detecting organic chlorine pesticide
ActiveCN106092983AIncreased sensitivityStrong selective recognition abilityFluorescence/phosphorescenceSensor arrayHigh sensitive
The invention relates to a method for preparing a Y2O3:Tb<3+>@SiO2-NH2 fluorescence sensor array used for detecting an organic chlorine pesticide. The marking recognition sites in the fluorescence sensor array are mutually effected with organic chlorine pesticide molecules (target molecules), the target molecules and Tb<3+> on the recognition sites form an organic ligand through coordination, and change of the fluorescence intensity of Tb<3+> is used for detecting the target molecules. The method comprises the following three steps: preparing Y2O3:Tb<3+> fluorescent powder, then synthesizing a Y2O3:Tb<3+>@SiO2-NH2 fluorescence probe having capability for identifying the marking target molecules, finally, through a micromachining technology and a plasma etching method, dropping the fluid suspension of the fluorescence probe having the capability for identifying the marking target molecules on a silicon chip, naturally drying the silicon chip, and spontaneously putting the fluorescence probe materials in a micro hole to obtain the fluorescence sensor array for high-selectivity identification and high sensitive signal detection on the target molecules.
Owner:HEFEI UNIV
Covalent labeling method for quickly detecting colloidal gold
The invention provides a labeling method for immunological detection of nanometer colloidal gold. The covalent labeling method comprises the following steps: preparing a gold nanoparticle with a small particle diameter through a sodium citrate reduction method, using the prepared gold nanoparticle with the small particle diameter as seed gold, and slowly and dropwise adding chloroauric acid and a weak reducing agent at a constant speed so as to prepare a colloidal gold particle with a large particle diameter; treating an antibody to be labeled or protein with a Traut's reagent so as to combine the treated antibody or the treated protein with the prepared colloidal gold in a coupling manner; or, using the prepared gold nanoparticle with the small particle diameter as the seed gold, slowly and dropwise adding the chloroauric acid and a carboxylic acid reducing agent containing sulfhydryl at a constant speed so as to prepare a colloidal gold particle with the large particle diameter and the sulfhydryl on the surface, activating the prepared colloidal gold particle with a cross-linking agent so as to obtain a functional colloidal gold particle, and combining the treated antibody or the treated protein with the prepared colloidal gold particle in the coupling manner so as to form a gold labelled antibody protein compound. Through the use of the covalent labeling method disclosed by the invention, the stability of the gold labelled antibody protein compound in a complex medium is improved, and the selective recognition to objective protein is greatly enhanced, so that the sensitivity of a gold labelled test paper strip is relatively improved.
Owner:ZHUHAI LIVZON DIAGNOSTICS
Novel water-soluble polymer capable of selectively recognizing mercury ion as well as preparation method and application thereof
ActiveCN104628939AThe detection method is simpleImprove selective recognitionMaterial analysis by observing effect on chemical indicatorColor/spectral properties measurementsPolymer scienceMercuric ion
The invention discloses a novel water-soluble polymer capable of selectively recognizing mercury ion; the structural formula of the novel water-soluble polymer is as shown in the specification, wherein R1 is hydrogen or alkyl; R2 is hydrogen, alkyl or hydroxyalkyl; the molecular weight is 1.6*10<4> to 5.5*10<6> g / mol; and the ratio of m to n is (100-200):1. The invention further discloses a synthetic method of the polymer. The novel water-soluble polymer is prepared by copolymerizing a tetraphenyl porphyrin monomer AOTPP and an acrylamide monomer through radical polymerization reaction. The invention further discloses application of the polymer. The polymer is capable of highly selectively detecting mercury ion in aqueous solution through a common ultraviolet-visible absorptionspectromtry and a steady-state fluorescence emission spectrometry.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Benzimidazole derivative phosphate anion fluorescence probe synthesis and application method
ActiveCN106349167ASimple detection operationSimple and convenient detection operationOrganic chemistryFluorescence/phosphorescenceBenzimidazole derivativePhosphate ion
The invention discloses a method for synthesis of a benzimidazole derivative phosphate anion fluorescence probe and an application method thereof, and relates to the field of synthesis and application of the fluorescence probe. The synthesis of the benzimidazole derivative phosphate anion fluorescence probe can solve the problem that the florescence probes used for detecting PO43- are very scarce in kinds, that the identification of PO43- can be easily influenced by H2PO4- and HPO42-, and that the florescence probes can not directly carry out identification independently. The Benzimidazole derivative phosphate anion fluorescence probe is 1,4 phenyl double (carbamoyl methyl) N e alkylbenzimidazole ammonium chloride], which is obtained under quaterisation between Dichloro acetyl para-phenylene diamine and N-E alkyl benzene and imidazole. The fluorescence probe dissolves in HEPES buffered solution prepared by deionized water, and then test change in the absorbance value and fluorescence intensity to adjust the existence of PO43-. The Benzimidazole derivative phosphate anion fluorescence probe can be used to directly detect the po43- in water and blood.
Owner:QIQIHAR UNIVERSITY
Method for preparing Eu3+ labelled molecule imprinted sensor used for pesticide residue detection
ActiveCN105136758ARealize detectionReliable methodFluorescence/phosphorescencePesticide residueNanoparticle
The invention relates to a method for preparing a Eu3+ labelled molecule imprinted sensor used for pesticide residue detection and belongs to the technical field of environment functional material preparation. The method comprises the steps that Eu3+ and amino groups and pesticide residue molecules in APTS are pre-organized and then subjected to hydrolytic crosslinking condensation with TEOS so that the Eu3+ labelled pesticide residue molecule imprinted silicon dioxide nanoparticle sensor can be obtained, pesticide residue molecule selective recognition site holes are obtained after pesticide residue molecules are eluted, chelation between pesticide residue molecules and Eu3+ on a recognition site is conducted after the pesticide residue molecules enter the recognition site of the sensor again, the fluorescence intensity of the pesticide residue molecules is improved after being chelated with Eu3+, and then high-selectivity, high-binding-capacity and high-sensitivity detection of the trace pesticide residue molecules is achieved by means of the change of the fluorescence intensity. The obtained Eu3+ labelled molecule imprinted sensor has the advantages that the rigidity of the recognition site is high, Eu3+ is not prone to elution, repeated utilization can be achieved, solvent inertness, light stability and single dispersity are high, and size is uniform.
Owner:HEFEI UNIV
Preparation of difunctional monomer magnetic molecularly-imprinted polymer and application of polymer in adsorption on bisphenol A in wastewater
InactiveCN105924578AImprove selective recognitionImprove thermal stabilityWater contaminantsWater/sewage treatment by sorptionCross-linkPolymer science
The invention discloses a difunctional monomer magnetic molecularly-imprinted polymer. The difunctional monomer magnetic molecularly-imprinted polymer is prepared by taking ATP-Fe3O4 as a matrix, taking bisphenol A as a template and taking acrylamide and methacrylic acid as functional monomers under the action of a cross-linking agent and an initiating agent through a thermal polymerization method. Adsorption tests show that the prepared difunctional monomer magnetic molecularly-imprinted polymer shows the high selective recognition capacity on template molecule bisphenol A, has the high heat stability, has the specific adsorption effect on BPA in the wastewater, is used for detecting BPA in a water sample and has the advantages of the fast responsiveness, the predetermination property, the recognizability and the practicability, and therefore the difunctional monomer magnetic molecularly-imprinted polymer has the very good application prospect in detection and adsorption on bisphenol A (BPA) in the wastewater in wastewater treatment.
Owner:NORTHWEST NORMAL UNIVERSITY
Preparation method of compound (I) 4-hydroxy substituted phenyl imine type rhodamine 6G fluorescence molecule probe and purpose thereof
InactiveCN103232466ASafe preparationEasy to synthesizeOrganic chemistryMaterial analysis by observing effect on chemical indicatorRhodamine 6GMolecular probe
Owner:TIANJIN NORMAL UNIVERSITY
Preparation method of SrAlB2O7:Eu<3+> fluorescent probe for detection of OPs (organophosphorus pesticides)
ActiveCN105255484AHigh fluorescence intensityWide range of applicationsFluorescence/phosphorescenceLuminescent compositionsOrganophosphorus pesticidesBoronic acid
The invention provides a preparation method of a SrAlB2O7:Eu<3+> fluorescent probe for detection of OPs (organophosphorus pesticides). The preparation method comprises two steps as follow: firstly, Eu<3+> and target analyte, OP molecules, interact to form organic ligand, then strontium nitrate, aluminum nitrate, boric acid and a pore-forming agent are added to a beaker accommodating deionized water, the mixture is stirred, and sol is formed; calcination is performed after gel is obtained, and Eu<3+> marked OP molecular printing SrAl2B2O7:Eu<3+> fluorescent probe is obtained. OP molecule selectivity recognition sites are available after template molecules are removed, the OP molecules further interact with Eu<3+> on the recognition sites after entering the recognition sites of the fluorescent probe, the OP molecules and the recognition sites form organic ligand, the organic ligand absorbs energy and transfers the energy to Eu<3+>, the fluorescence intensity of the fluorescent probe is changed, and selective recognition and detection of pesticide molecules are realized.
Owner:HEFEI UNIV
Preparation method and application of fluorescent probe based on benzothiazole Schiff base
ActiveCN112812075AThe synthesis steps are simpleLow costOrganic chemistryFluorescence/phosphorescenceFluoProbesHexamethylenetetramine
The invention discloses a preparation method and application of a fluorescent probe based on benzothiazole Schiff base, belonging to the technical field of fluorescent probes for metal ion detection. The molecular formula of the fluorescent probe is C34H31N5O2S2. The preparation method comprises the following steps: (1) subjecting 2-hydroxy-5-methylbenzaldehyde with 2-aminothiophenol to reacting to obtain a compound a; (2) carrying out the Darff reaction on the compound a and hexamethylenetetramine to generate a compound b; and (3) carrying out a condensation reaction on the compound b and diethylenetriamine to obtain a probe molecule L. The probe molecule reacts with zinc ions in a solution containing both absolute ethyl alcohol and Tris-HCl in a ratio of 3: 2, and the concentration of the zinc ions can be detected by utilizing the change of fluorescence intensity. The probe disclosed by the invention is simple and convenient to synthesize, mild in reaction conditions and high in selectivity and sensitivity to zinc ions, the response range of the probe is 0-8.00 [mu]M, and the detection limit of the probe is 60.4 nM. In addition, through a laser confocal scanning microtechnique, the novel fluorescent probe is successfully applied to detection of zinc ions in cells.
Owner:SHANXI UNIV
Preparation method of nano-silver SERS probe for TNT detection
ActiveCN109738415AImprove selective recognitionIncreased sensitivityRaman scatteringSpatial structureTwo step
The invention discloses a preparation method of a nano-silver SERS probe for TNT detection. The preparation method comprises the following steps of preparing a silver nanorod, and forming a single-layer self-assembly space structure and a double-layer self-assembly space structure of the silver nanorod on a glass slide in sequence. The preparation process comprises the following two steps of firstly, preparing the silver nanorod, immersing the glass slide into an ethanol solution of polyvinyl pyridine and then immersing the glass into into silver sol, forming a single-layer self-assembly silver nanorod on the surface of the glass slide, immersing the single-layer self-assembly silver nanorod into a 2,4-dimercaptoaniline solution, forming a 2,4-dimercaptoaniline molecular layer on the surface of the silver nanorod through the action of an Ag-S bond, and lastly, immersing into the silver sol to prepare the nano-silver SERS probe with the double-layer spatial structure. According to the method, high-selectivity identification and high-sensitivity detection of the trace TNT are realized, and a detection limit is 10<-11> mol / L. The method is simple to prepare, low in cost, good in selectivity and high sensitivity, and the enhancement effects of nano-silver substrates with different shapes on SERS are compared.
Owner:HEFEI UNIV
Cyanide ion sensor molecule, as well as preparation method and application thereof in detection of cyanide ions
InactiveCN105693552AHigh selectivityImprove selective recognitionMaterial analysis by observing effect on chemical indicatorOrganic compound preparationSalicylaldehydeEthyl group
The invention discloses a cyanide ion fluorescence sensor taking N,N-diethyl salicylaldehyde as a fluorescence signal group and acylhydrazone as a recognition site. The sensor is prepared by performing esterification and hydrazinolysis on 2-hydroxy-3-naphthoic acid and reacting with N,N-diethyl salicylaldehyde. The recognition effect of the sensor for F-, Cl-, Br-, I-, AcO-, H2PO4-, HSO4-, ClO4-, CN- and SCN- totally ten kinds of negative ions is studied by the colorimetric method and fluorescent spectrometry, and indicates that the sensor molecule can perform single selection recognition on cyanide ions in a water-containing system and has relatively high sensitivity on CN- detection, and the recognition process is not interfered by other negative ions. The invention further provides CN- detection test paper based on the sensor molecule. The test paper can be used for conveniently and quickly detecting CN- in a water-containing medium. The sensor molecule FC which is designed and synthesized by the invention is simple in structure, simple and convenient in synthesizing method and low in cost, and has a good application prospect in CN- detection.
Owner:NORTHWEST NORMAL UNIVERSITY
Preparation of amino-functionalized hydrazone covalent organic framework material and application thereof
PendingCN113248671AAbundant amino functional sitesHigh crystallinityFluorescence/phosphorescenceFluoProbesAcetic acid
The invention belongs to the technical field of covalent organic framework functional materials, particularly relates to preparation and application of an amino-functionalized hydrazone covalent organic framework material, and aims to develop a novel amino-functionalized sensing material which has a strong fluorescence effect and can be used as a fluorescent probe for metal ion recognition. The preparation method comprises the following steps: firstly designing and synthesizing an amino-functionalized dihydrazide monomer containing functional groups with different reaction activities, and then carrying out acetic acid catalytic reaction on the amino-functionalized dihydrazide monomer and a benzenetricarboxaldehyde monomer in an organic solvent under the protection effect of inert gas. The prepared amino-functionalized hydrazone covalent organic framework material has the advantages of rich amino functional sites, good crystallinity, high stability and the like, has strong fluorescence, and can be used as a fluorescent probe for high-sensitivity and high-selectivity recognition of Fe (III) ions.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Preparation of hydrazone chiral covalent organic framework material and application of hydrazone chiral covalent organic framework material in metal ion recognition
ActiveCN112175194AHigh crystallinityImprove stabilityFluorescence/phosphorescenceLuminescent compositionsFluoProbesFluorescence
The invention belongs to the technical field of covalent organic framework functional materials, particularly relates to preparation of a hydrazone chiral covalent organic framework material and an application of the hydrazone chiral covalent organic framework material in metal ion recognition, and aims to develop a novel sensing material which has strong fluorescence and can be used as a fluorescent probe for the metal ion recognition. The hydrazone chiral covalent organic framework material is obtained through an acetic acid catalytic reaction of tris (4-formyl phenyl)amine and chiral hydrazide monomers in an organic solvent under the protection action of inert gas, and the prepared hydrazone chiral covalent organic framework material has the advantages of being good in crystallinity, high in stability and the like, has strong fluorescence and can be used as a fluorescent probe for recognizing Fe (III) ions. Meanwhile, the hydrazone chiral covalent organic framework material is bonded to an amino-modified QCM wafer through an in-situ growth method, and a COF-based QCM sensor capable of achieving high-selectivity recognition of Fe (III) is prepared.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Carbon-gold nanocluster ratio fluorescent sensor microsphere as well as construction and application thereof
ActiveCN108226484AImprove selective recognitionAvoid reactionFluorescence/phosphorescenceMicrosphereFluorescence
The invention belongs to the field of material science and engineering and environment analysis chemistry, and particularly discloses a dithiothreitol-modified carbon-gold nanocluster ratio fluorescent sensor microsphere and construction of the dithiothreitol-modified carbon-gold nanocluster ratio fluorescent sensor microsphere as well as application of the dithiothreitol-modified carbon-gold nanocluster ratio fluorescent sensor microsphere in high-selectivity high-sensitivity detection of mercury ions. A sensor utilizes a novel fluorescent nano-material carbon-gold nanocluster as a fluorescent source, and then thiol (-SH) is modified on the surface of the gold nanocluster through DTT (dithiothreitol); the mercury ions are attracted to the surface of the cluster by using the thiol; becauseaction force exists between the mercury ions (5d10) and gold ions (5d10), the high-selectivity high-sensitivity detection of the mercury ions can be realized. According to the carbon-gold nanoclusterratio fluorescent sensor microsphere as well as the construction and the application thereof disclosed by the invention, through a mixed solution of microwave glucose and gold seeds, the carbon-goldnanocluster with double emission wavelengths is prepared, so that a construction process of the ratio fluorescent sensor is simplified, and a complicated preparation process of a fluorescent compositematerial is effectively avoided. The carbon-gold nanocluster ratio fluorescent sensor microsphere is used for performing analysis and detection on the mercury ions in actual water samples, and a standard adding recovery ratio is 90 percent or above.
Owner:YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
Preparation method for artificial antibody for caffeine detection
Owner:WUXI ZODOLABS BIOTECH
Molecular imprinting electrochemical sensor for selectively identifying chloramphenicol and fabrication method of molecular imprinting electrochemical sensor
InactiveCN109298034AGuaranteed electrical conductivityGuaranteed SensitivityMaterial electrochemical variablesFunctional monomerMeth-
The invention discloses a molecular imprinting electrochemical sensor for selectively identifying chloramphenicol and a fabrication method of the molecular imprinting electrochemical sensor, and belongs to the field of a new material. The chloramphenicol is used as a template molecule, polymethacrylic acid is used as a functional monomer, N,N-methylene acrylamide is used as a crosslinking agent, agraphene-based composite metal nanometer material is used for triggering polymerization reaction, an electroinitiated free radical polymerization technology is combined, a molecular imprinting polymerization thin film is directly fabricated on a surface of an electrode, the chloramphenicol in a composite matrix can be rapidly identified, and high-sensitive quantitative detection is achieved. By the molecular imprinting electrochemical sensor, the dilemma problem of the molecular imprinting electrochemical sensor during the fabrication process are solved, direct film formation of a molecular imprinting material is achieved, and the conductivity of the molecular imprinting material is also ensured.
Owner:HUBEI INSPECTION & QUARANTINE TECH CENT
Preparation method for cubic nanogold SERS (Surface Enhanced Raman Scattering) probe used for TNT (trinitrotoluene) detection
ActiveCN110333225ALow costEasy to operateRaman scatteringNanosensorsGold particlesFunctional modification
The invention discloses a preparation method for a cubic nanogold SERS probe used for TNT detection. The preparation method comprises seed crystal gold preparation, further growth and the functional modification and the self assembling of a silicon wafer. The preparation process of the preparation method comprises the following steps that: firstly, preparing seed crystal gold, and enabling the seed crystal gold to further grow; secondly, through a seed growth mechanism, strictly controlling the growth environment of the seed crystal gold to enable the seed crystal gold to grow into a cubic structure; thirdly, modifying sulfydryl on a polished 1*1cm<2> silicon wafer to enable a gold particle monolayer to be assembled to the surface of the silicon wafer on the own; and finally, modifying thesurface of the silicon wafer with electron-rich amino, realizing the selective recognition of the TNT further through a static electricity mutual function with three electron deficiency nitryls in aTNT target molecule, and utilizing a local area plasma resonance field on the surface of the nanogold to amplify and enhance the conventional Raman signal of the TNT molecule so as to realize the trace detection of the TNT, wherein a detection limit is 10<-9>mol.L<-1>. The preparation method has the advantages of being simple in preparation, convenient in operation, low in cost, good in selectivity and high in sensitivity.
Owner:HEFEI UNIV
Bifunctional probe for identifying iron ions and fluoride ions, preparation and application of bifunctional probe
ActiveCN109900670AThe synthesis steps are simpleHigh synthetic yieldMaterial analysis by observing effect on chemical indicatorColor/spectral properties measurementsSynthesis methodsPhysical chemistry
The invention discloses a bifunctional probe for identifying iron ions and fluoride ions, a preparation and application of the bifunctional probe. The bifunctional probe is of a structure representedby a formula I described in the descriptions of the invention. The synthesis method of the bifunctional probe of the invention is simple and enables a high yield. The bifunctional probe can realize the detection of iron ions and fluoride ions and is reversible in the identification of the fluoride ions.
Owner:UNIV OF JINAN
One-step hydrothermal synthesis based on ionic liquid novel fluorescent carbon dots and detection application of one-step hydrothermal synthesis for sulfathiazole
PendingCN111272717AEasy to makeLow costNano-carbonFluorescence/phosphorescenceFluoProbesTetrafluoroborate
The invention discloses the one-step hydrothermal synthesis based on ionic liquid novel fluorescent carbon dots and the detection application of one-step hydrothermal synthesis for sulfathiazole. Theone-step hydrothermal synthesis is characterized by taking 1-allyl-3-vinyl imidazole tetrafluoroborate as a carbon source, the malonic acid as a passivating agent, and synthesizing the novel fluorescent carbon dots capable of specifically recognizing sulfathiazole through a high-temperature hydrothermal reaction. A novel sulfathiazole fluorescent probe synthesized by the invention is simple in preparation process, low in cost and high in selectivity, has high sensitivity and accuracy in the detection of the trace sulfathiazole remained in an environmental sample, and has a wide application prospect in the field of analysis and detection of sulfathiazole.
Owner:HENAN NORMAL UNIV
Preparation method of molecularly imprinted open tubular column
ActiveCN110302562AImprove selective recognitionHigh sensitivityOther chemical processesSolid sorbent liquid separationEpoxyAlcohol
The invention discloses a preparation method of a molecularly imprinted open tubular column, and relates to the technical field of new materials. The preparation method of the molecularly imprinted open tubular column comprises the following steps: a molecularly imprinted polymer is prepared by taking p-hydroxy-benzoate ester as template molecules and subjected to epoxy group modification, and theepoxy modified molecularly imprinted polymer is obtained; the surface of a capillary tube is subjected to amino modification, and an amino-modified capillary tubular column is obtained; the epoxy modified molecularly imprinted polymer is dispersed in ethyl alcohol to form a mixed solution; and the mixed solution is injected into the amino-modified capillary tubular column, sealing and polymerization are conducted, and the molecularly imprinted open tubular column is formed. The molecularly imprinted open tubular column is prepared, and the molecularly imprinted open tubular column can analyzethe p-hydroxy-benzoate ester in a complex sample.
Owner:WUHAN POLYTECHNIC UNIVERSITY
Paper base dual-imprinting material capable of selectively recognizing protein as well as preparation method and application of paper base dual-imprinting material
ActiveCN108084337AWide variety of sourcesLow costOther chemical processesMaterial analysis by observing effect on chemical indicatorPaper sheetHemin
The invention discloses a paper base dual-imprinting material capable of selectively recognizing a protein as well as a preparation method and an application of the paper base dual-imprinting material. The preparation method comprises the steps of immobilizing a graphene oxide-hemin compound on the surface of a filter paper material and preparing the dual-imprinting material on the surface of filter paper. The paper base dual-imprinting material is used for selectively recognizing and quantitatively detecting the protein. The paper base dual-imprinting material has the characteristics of low cost, environmental protection, simplicity in operation, high recyclability, and specific recognition of the protein, and particularly has the excellent characteristics of color development, water retention and hydrophily, and can rapidly detect the protein macromolecule at high throughput.
Owner:HUAZHONG UNIV OF SCI & TECH
Vinyl ether Hg<2+> fluorescent probe and preparation method and application thereof
InactiveCN108997255AImprove selective recognitionNo distractionOrganic chemistryFluorescence/phosphorescenceSolubilityVinyl ether
The invention discloses a vinyl ether Hg<2+> fluorescent probe and a preparation method and application thereof, and belongs to the technical field of high-selectivity fluorescent probes for detectingHg<2+>. The technical scheme comprises the key points that the vinyl ether Hg<2+> fluorescent probe has a structural formula as shown. The invention also specifically discloses the preparation methodof the vinyl ether Hg<2+> fluorescent probe and the application of the vinyl ether Hg<2+> fluorescent probe in selectively detection and analysis of Hg<2+> in an aqueous environment system or a biological cell system. Hg<2+> can be recognized in a highly selective mode through the vinyl ether Hg<2+> fluorescent probe, and no interference is caused by common coexisting metal ions; and the preparedvinyl ether Hg<2+> fluorescent probe has good water solubility, biological compatibility and membrane penetrability, can be applied to detection of intracellular Hg<2+> and cell imaging.
Owner:HENAN NORMAL UNIV
Preparation method and application of Mg2+ fluorescent probe with AIEE property
InactiveCN104926687AImprove selective recognitionHigh fluorescence intensityFluorescence/phosphorescenceLuminescent compositionsAlcoholFluorescence
The invention discloses a preparation method and application of an Mg2+ fluorescent probe with an AIEE property. The preparation method of the Mg2+ fluorescent probe with the AIEE property includes the following steps that 8 mmol o-phenylenediamine and 4 mmol 5-bromosalicylaldehyde are added into a 35 mL ethanol solution in sequence, and reflux is performed for 4 hours after the solution is stirred uniformly to obtain a raw product; recrystallization is performed on the raw product by use of 95% ethyl alcohol, and drying is performed at the indoor temperature to obtain the fluorescent probe. According to the preparation method of the Mg2+ fluorescent probe with the AIEE property, the o-phenylenediamine and the 5-bromosalicylaldehyde are designed and synthesized into a Schiff base fluorescent probe with the AIEE property through a simple and convenient method, relative to other metal icons, the probe L has high selective recognition effect on magnesium ion, other positive icons have no influence on the probe L, the fluorescent condition is strengthened, and the fluorescent probe with the AIEE property can be used as an Mg2+ sensitive probe for detecting other positive icons in acetonitrile with no interference or with less interference.
Owner:BOHAI UNIV
A kind of network ion imprinted polymer, its preparation method and application
ActiveCN106046391BEasy to manufactureGood water compatibilityOther chemical processesWater contaminantsPolymer scienceGenipin
The invention discloses a reticular ion imprinting polymer for selectively identifying lead ions, and a preparation method and an applicationthereof, and belongs to the field of new materials. The reticular ion imprinting polymer is characterized in that 8-hydroxyquinoline-grafted gelatinpolypeptidewhich is used as a function monomeris synthesized by Mannich reaction, and the advantages of richer activity groups, good shrinkage / swelling property, good filming property and the like are realized; on the basis, a preparation technique for preparing the ion imprinting polymer by a physical filming-secondary swelling-chemical crosslinking three-step preparation type is proposed; by controlling the size of a dish used during swelling, the self torsion / folding of a film material is performed in a particular slit space, so as to obtain various shapes of imprinting polymers; finally, after double crosslinking of genipin / transglutaminase, the reticular lead ion imprinting polymer thin film is formed. Since the function monomer contains multiple types of activity groups, the double-crosslinking system and the particular reticular structure, theion imprinting polymerhas the quick adsorption dynamics, high adsorption capacity and selective identifying function on the lead ions.
Owner:HUAZHONG UNIV OF SCI & TECH
Optical fiber sensor and preparation method thereof
ActiveCN111257285AQuick responseStrong reliabilityMaterial nanotechnologyPhase-affecting property measurementsGratingPhysical chemistry
The invention discloses an optical fiber sensor and a preparation method thereof, and the method comprises the following steps: employing a fused biconical taper method to process a Bragg grating, andforming a conical transition region and a waist region with the diameter at a micro-nano scale; and coating the waist region with graphene through vacuum filtration by utilizing graphene dispersion liquid, forming a graphene film in the waist region, and separating filter paper to obtain the optical fiber sensor. According to the invention, the sensitivity and response characteristics of the sensor are improved by utilizing the structural characteristics and relatively strong adsorption capacity of graphene, the selective recognition and detection of harmful gas molecules by the optical fibersensor are improved, the measuring stability under a room temperature condition is realized, and reliable monitoring data is obtained. The preparation method is simple, the sensor is novel in structure, high in sensitivity and convenient to carry, and compared with a dispensing process, the graphene and optical fiber sensor prepared through vacuum filtration has the advantages that the compositestructure is more compact, the self-assembly structure is optimized, the sensor is convenient to expose, the gas detection sensitivity is high, and the optical fiber mechanical property is better.
Owner:XI'AN PETROLEUM UNIVERSITY
Method for improving 5G differential protection economy based on disturbance identification
PendingCN114400629AImprove selective recognitionSolve the problem of low selectivity of relay protectionEmergency protective circuit arrangementsControl engineeringFull data
The invention discloses a method for improving the economy of 5G differential protection based on disturbance identification, and the method comprises the steps: in the 5G differential protection of a distribution network line, in a normal state, sending a normal message to other sides through the differential protection of the local side every T1; when disturbance occurs, the slave side continuously sends full data messages to the host side; according to the method, the situation that the power distribution network has a certain probability of disturbance and fault occurrence during normal operation and sends the synchronous state and the state quantity related to differential motion at regular time in a normal state is considered, and the full-data message is continuously sent only when disturbance, abnormity or fault occurs, so that the monthly average flow of 5G differential motion is reduced to the maximum extent, the monthly average flow of 5G differential motion can be effectively reduced, and the service life of the power distribution network is prolonged. A large amount of popularization and application of 5G differential motion in the power distribution network are promoted, the selective fault recognition capability of the power distribution network is improved, and therefore the problems that the power distribution network multi-end power line fault cannot be accurately recognized and the current power distribution network line relay protection selectivity is not high are solved.
Owner:BEIJING SIFANG JIBAO ENG TECH +1
A kind of pentacene fluorescence ratio probe and its preparation method and application
ActiveCN108623551BImprove selective recognitionRealize detectionOrganic chemistryOrganic compound preparationFluorescence ratioStructural formula
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Paper-based double-imprinted material for selective protein recognition, preparation method and application
ActiveCN108084337BWide variety of sourcesLow costOther chemical processesMaterial analysis by observing effect on chemical indicatorHeminPaper based
The invention discloses a paper base dual-imprinting material capable of selectively recognizing a protein as well as a preparation method and an application of the paper base dual-imprinting material. The preparation method comprises the steps of immobilizing a graphene oxide-hemin compound on the surface of a filter paper material and preparing the dual-imprinting material on the surface of filter paper. The paper base dual-imprinting material is used for selectively recognizing and quantitatively detecting the protein. The paper base dual-imprinting material has the characteristics of low cost, environmental protection, simplicity in operation, high recyclability, and specific recognition of the protein, and particularly has the excellent characteristics of color development, water retention and hydrophily, and can rapidly detect the protein macromolecule at high throughput.
Owner:HUAZHONG UNIV OF SCI & TECH
A covalent labeling method of colloidal gold for rapid detection
Owner:ZHUHAI LIVZON DIAGNOSTICS
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