41 results about "Methenium" patented technology

The invention discloses an acid-resistant composite membrane as well as a preparation method and application thereof in acid purification, and the preparation method comprises the following steps: performing polymerization reaction on perfluoro-2-methylene-4-methyl-1, 3-dioxolame and chlorotrifluoroethylene in a perfluoro solvent under the action of a catalyst, then preparing a copolymer, the perfluoro solvent and acetone into a composite layer membrane liquid, and performing acid-resistant treatment on the composite layer membrane liquid to obtain the acid-resistant composite membrane. And coating on the surface of the base membrane, and drying. The prepared acid-resistant composite membrane can maintain good stability in strong acid such as hydrofluoric acid, has a high interception effect on acid radical ions and metal ions in a high-acid solution, and can be applied to purification of various acids.

The invention discloses a pyridinedicarboxylic acid coordinated catalyst, a composite catalyst, a preparation method and application. The general formula of the catalyst is # imgabs0 # B; the catalyst is calcium ions, sodium ions, magnesium ions, lithium ions, potassium ions, ammonium ions, octadecyl dimethyl benzyl ammonium ions, octadecyl trimethyl ammonium ions, dodecyl dimethyl benzyl ammonium ions, dodecyl trimethyl ammonium ions, octyl tributyl phosphonium ions, tetrabutyl phosphonium ions, hexyl tributyl phosphonium ions and tributyl ethyl phosphonium ions; the ionic liquid is a tetrabutyl phosphonium ion, a tributyl hexyl phosphonium ion, a tetramethyl ammonium ion, a tetraethylammonium ion, a tetrabutyl ammonium ion, a benzyl trimethyl ammonium ion, a benzyl triphenyl phosphonium ion or a benzyl triethylammonium ion; m is Cr, Mo, V, W, Cu, Fe, Co, Ni or Zr; r is a C1-C10 alkyl group; x is an integer between 1 and 20; and y is an integer between 1 and 40, so that the p-nitrotoluene oxidation reaction selectivity and the p-nitrotoluene conversion rate can be improved.

An ionic cuprous complex with thermally activated delayed fluorescence performance, characterized in that: the ionic cuprous complex with thermally activated delayed fluorescence performance is tetrakis(3,5-bis(trifluoromethyl)phenyl)boronic acid-[bis(2-diphenylphosphinophenyl)ether]-[1,10-phenanthroline]copper(I), tetrakis(3,5-bis(trifluoromethyl)phenyl)boronic acid-[4,5-bisdiphenylphosphino-9,9-dimethylxanthene]-[1,10-phenanthroline]copper(I), tetrakis(3,5-bis(trifluoromethyl)phenyl)boronic acid-[4,5-bisdiphenylphosphino-9,9-dimethylxanthene]-[1,10-phenanthroline]copper(I), tetrakis(3, 5-Bis(trifluoromethyl)phenyl)boronic acid-[bis(2-diphenylphosphinophenyl)ether]-[4,7-diphenyl-1,10-phenanthroline]copper(I), tetrakis(3,5-bis(trifluoromethyl)phenyl)boronic acid-[4,5-bis(diphenylphosphinophenyl)ether]-[4,7-diphenyl-1,10-phenanthroline]copper(I), with complexes 1b, 2a, and 2b as luminescent dyes. These complexes have application value in the recording, storage, and protection of information.

The invention discloses a preparation method of a covalent organic framework photocatalyst for photocatalytic reduction of CO2, which comprises the following steps: adding 4, 4 ', 4' '-(1, 3, 5-triazine-2, 4, 6-triyl) triphenylamine and 2, 5-dibromobenzene-1, 2, 4, 5-tetracarboxylic dianhydride into a reaction kettle, then adding 1-hydroxy-3-methylbenzene and isoquinoline, and uniformly mixing; and carrying out microwave heating on the reaction kettle, cooling to room temperature, filtering, collecting precipitate, washing, and then carrying out Soxhlet extraction and vacuum drying to obtain the covalent organic framework photocatalyst. A surface halogen atom modification strategy is designed and used for regulating and controlling electron distribution and light capture capacity of a donor-acceptor (D-A) in TzPm-COF, and results show that the strategy can effectively improve photocatalytic activity and selectivity of reduction of CO2 into CO, and can be applied to preparation of the TzPm-COF catalyst. A reasonable design strategy is provided for developing a functional modified COFs material for efficiently and selectively photocatalytic CO2 reduction.

The invention belongs to the technical field of electrocatalysis, and discloses a chlorella electrode with redox activity and a preparation method and application thereof. Under a constant potential window, methylene blue, aniline and chlorella are synchronously subjected to electrochemical oxidation to generate free radicals, an electron transport chain between chlorella and methylene blue is constructed through a click reaction, meanwhile, an interpenetrating network structure copolymer is generated in the copolymerization process, and chlorella is wrapped and anchored on the surface of an electrode. According to the method, chlorella can be effectively dispersed, more active sites are exposed, the electron transfer efficiency is improved, and the stability of the electrode is enhanced under the interaction of the three. The obtained chlorella electrode with redox activity has an application prospect in the field of electrocatalytic reduction of carbon dioxide into high-added-value products.

This invention relates to the field of ceramic materials, specifically disclosing a high water-resistant magnesium phosphate cement-based foam ceramic and its preparation method. The foam ceramic comprises the following components: 100-150 parts magnesium phosphate cement, 1-5 parts retarder, 5-20 parts foaming agent, 1-5 parts foam stabilizer, 5-15 parts lutetium ion source, 1-8 parts methylene phosphonic acid component, and 30-60 parts water. The method includes: (1) mixing the lutetium ion source, methylene phosphonic acid component, and water to obtain a complex solution. (2) mixing the magnesium phosphate cement and foam stabilizer, then adding the complex solution to the mixture and mixing to obtain a slurry. (3) adding the foaming agent to the slurry and allowing it to stand for foaming, followed by curing to obtain the foam ceramic. This invention not only effectively reduces the solubility of magnesium phosphate cement hydration products, but also combines CO2 foaming to generate a low-solubility magnesium carbonate shell, significantly improving the long-term stability of the foam ceramic in an aquatic environment while maintaining high porosity.

The invention relates to a preparation method of methylenecyclopentane and a composition containing the methylenecyclopentane, in particular to a method for synthesizing the methylenecyclopentane by reacting substituted triphenylphosphine (such as tris (4-methoxyphenyl) phosphine and the like) with methyl iodide / methyl bromide to generate substituted methyl triphenyl phosphonium halide and then reacting with cyclopentanone through Wittig in the presence of alkali. Compared with the traditional method, the method has the advantages that the byproduct is substituted benzene (the boiling point is more than 100 DEG C), the boiling point of the substituted benzene is obviously different from that of the target product (the boiling point is 77 DEG C), methylene cyclopentane with the purity of more than 99% can be obtained through simple rectification, and the yield reaches 85-95%.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a preparation method and application of a porous rhenium imprinted composite material. According to the technical scheme, the preparation method comprises the following steps: firstly, synthesizing silicon dioxide with a porous structure in an ionic liquid mixed system, dispersing the porous silicon dioxide in a rhenium-containing ionic liquid aqueous solution, then adding N-vinyl imidazole and 4-chloromethyl styrene, adding azodiisobutyronitrile, heating and stirring at 50-70 DEG C for 10-12 hours, and cooling to room temperature; after the reaction is completed, perrhenate ions used for imprinting are washed away with a diluted hydrochloric acid solution, meanwhile, other reactants which are not polymerized and are left on the surface are washed away, and the porous rhenium imprinting composite material is obtained through drying. When the material is applied to extraction and preparation of ammonium rhenate, the purity of the obtained ammonium rhenate product can reach 99.999% or above, the used reagent is environment-friendly, and obvious social benefits and economic benefits are achieved.

The present invention belongs to the technical field of tertiary oil recovery, and in particular to a corrosion inhibitor for acid fracturing and a preparation method thereof. The preparation method is as follows: (hydroxymethyl) triphenylphosphonium chloride, N, N-dimethylformamide, and a catalyst are sequentially added to an autoclave, the reactor is purged with nitrogen, vacuumized, heated at the same time, ethylene oxide is passed, the temperature is raised and the reaction is kept warm, the reaction pressure gradually decreases, and when the pressure no longer decreases, the reaction is stopped, and the reaction is cooled to less than 60 ° C; propylene oxide is passed, the temperature is raised and the reaction is kept warm, the reaction pressure gradually decreases, and when the pressure no longer decreases, the reaction is stopped, and the reaction is cooled to less than 60 ° C, pH7-8 is adjusted with hydrochloric acid, and N, N-dimethylformamide is distilled off under reduced pressure to obtain a product corrosion inhibitor. The present invention has the advantages of wide adaptability to temperature and good sustained release effect.

The invention relates to the technical field of electrochromism, in particular to a low-temperature stable fast-response electrochromic device and a preparation method thereof. The low-temperature stable fast-response electrochromic device comprises a top electrode layer, an electrochromic layer, a proton source layer, an electrolyte layer containing trifluoromethyl cation salt and a bottom electrode layer which are arranged in sequence. According to the invention, the pumping effect is utilized to design a relay type ion migration mechanism of a series structure, and the ultrafast response electrochromic device is realized. Moreover, aiming at the defect that the performance of the device is quickly reduced at low temperature due to the fact that the migration speed of large-size pump cations is quickly reduced at low temperature, a weak solute structure and high ion conductivity are designed, and a high-fluorine group with high electron affinity and high polarity is introduced, so that the low-temperature kinetics of the pump ions is remarkably improved; and the electrochromic performance of the device at low temperature is improved.

The invention belongs to the technical field of new materials, and particularly relates to a methyl functionalized metal-organic framework material as well as a preparation method and gas separation application thereof. The chemical general formula is [Zn2 (DMA) 4 (H2TCPB-Me) 2], Zn2 is two divalent zinc ions, H2TCPB-Me is a 1, 2, 4, 5-tetra (4-carboxyphenyl)-3, 6-xylene ligand without two protons, and DMA is an N, N-dimethylacetamide solvent molecule. The structure of the Zn-MOF material belongs to a triclinic system and a P-1 space group, and the cell parameters of the Zn-MOF material are as follows: the axial length # imgabs 0 # imgabs 1 #, the axial angle alpha is equal to 92.660 (3) degrees, the beta is equal to 92.832 (2) degrees, the gamma is equal to 104.788 (3) degrees, and the cell volume # imgabs 2 # Z is equal to 2. The preparation method of the Zn-MOF material comprises the following steps: dissolving metal zinc salt and H4TCPB-Me in a mixed solution of an organic solvent and water, and then adding nitric acid of 1: 10; sealing and placing in a drying oven at 80-120 DEG C for 24-72 hours; and naturally cooling to room temperature to obtain the Zn-MOF material. Due to the unique structure of the Zn-MOF material, the Zn-MOF material can be applied to the fields of separation of mixed gas C2H2 / CO2 and CO2 / CH4 and the like.

The present invention discloses a process for the continuous catalytic hydrogenation of MDA, and specifically discloses an apparatus and a process for the hydrogenation of methylenediphenylamine (MDA) using a hydrogen donor, where i) comprises a collection circuit for a closed first media circuit, a heat exchanger incorporated as at least one heat source into a heat exchanger of a main reactor and / or a separation unit, and a first evaporator, ii) comprises an intermediate circuit for a closed second medium circuit in which the first evaporator, the at least one compressor and the second evaporator are incorporated, and iii) comprises at least one distributor circuit for a closed third medium circuit in which the first evaporator, the at least one compressor and the second evaporator are incorporated, wherein the at least one heat exchanger of the reactor unit, the at least one heat exchanger of the conditioning unit and / or the at least one heat exchanger of the separating unit are combined as a heat sink in a heat exchange manner. The apparatus and process are improved in terms of product conversion and energy efficiency.

The invention relates to a preparation method of a perovskite quantum dot with a multi-fluorine passivation layer. The preparation method comprises the following steps: providing a monovalent cation precursor containing one or more of cesium, formamidine, methyl ammonium, rubidium and gallium; providing a lead source precursor containing a halogen element; providing a B-site cation doped precursor containing one or more of tin, copper, strontium, barium, zinc and calcium; a poor solvent containing fluorine ions is provided; respectively adding the monovalent cation precursor, the lead source precursor and the B-site cation doped precursor into a carrier solvent for dissolving and stirring treatment to obtain a perovskite precursor solution; and injecting the perovskite precursor solution into a poor solvent containing fluorine ions, carrying out a stirring reaction, and carrying out centrifugal purification to obtain the perovskite quantum dots. According to the method, the perovskite quantum dots and the multi-fluorine common passivation layer are synthesized through a one-step method, and the multi-fluorine common passivation layer not only can coat the perovskite quantum dots, but also can effectively passivate surface defects of the perovskite quantum dots.

The invention discloses a luminescent crystal material with functions of simultaneously detecting Fe < 3 + > and organic amine as well as a preparation method and application of the luminescent crystal material. According to the photochromic and AIE bifunctional organic ligand based on 4, 4 '-((9H-fluorene-9-subunit) methylene) bis (1-(4-carboxyl benzyl) pyridine-1-onium) chloride, the preparation method and the product of the photochromic and AIE luminous crystal material capable of detecting organic amine and Fe < 3 + > are provided, the synthesis route is simple and easy to control, the product yield can reach 38.4%, and the preparation method is suitable for industrial production and popularization. Compared with the prior art, the crystal material is simple, convenient and reliable in detection. Firstly, the quenching constant of luminescence enhanced detection of aqueous phase Fe < 3 + > can reach-1.46 * 10 < 4 > M <-1 >, the detection limit is as low as 4.18 * 10 <-6 > M, and the material is a photochromic luminescent crystal material for relatively sensitive detection of Fe < 3 + > at present. Secondly, the volatile organic amine can be visually detected. The HOF is light yellow, and the HOF shows gradually deepened yellow after di-n-propylamine, dimethylamine and trimethylamine are detected.

The invention provides a phenanthroimidazole Schiff base iron ion fluorescent probe compound as well as synthesis and application thereof, and belongs to the field of chemical synthesis and the technical field of cation detection. 4, 4 ', 4'-methylene triphenol, ethyl chloroacetate, hydrazine hydrate, phenanthrenequinone and 4, 4 '-biphenyldicarboxaldehyde are used as raw materials, the target product is synthesized in three steps, the process is simple, the reaction condition is mild, the reaction time is short, and the reaction is rapid and efficient; mercury salt and other toxic substances are not used in synthesis, so that toxic and side effects in reaction are reduced, and the method is safe, reliable, green and environment-friendly; raw materials in synthesis are low in price, the catalyst is extremely easy to remove, the synthesis process is simplified, and the comprehensive cost of synthesis is effectively reduced; and the final product is high in yield and high in purity. The compound can recognize Fe < 3 + > with high sensitivity and high selectivity, and has a good industrial analysis application prospect.

The invention discloses a camphor-based fluorescent probe for continuously detecting gallium ions and glyphosate as well as a preparation method and application of the camphor-based fluorescent probe. The fluorescent probe is 2, 3-bis ((2-hydroxy-5-((4, 7, 7-trimethyl-3-oxo-bicyclo [2.2. 1] heptyl-2-subunit) methyl) benzylidene) amino) maleic nitrile, and the structural formula of the fluorescent probe is shown in the description. According to the invention, 3-(3-formyl-4-hydroxybenzylidene) camphor is used as a raw material, and is subjected to a condensation reaction with 2, 3-diamino maleic nitrile, such that 2, 3-bis ((2-hydroxy-5-((4, 7, 7-trimethyl-3-oxo-bicyclo [2.2. 1] heptyl-2-subunit) methyl) benzylidene) amino) maleic nitrile is obtained, and the 2, 3-bis ((2-hydroxy-5-((4, 7, 7-trimethyl-3-oxo-bicyclo [2.2. 1] heptyl-2-subunit) methyl) benzylidene) amino) maleic nitrile is obtained. The compound can be specifically subjected to complexation reaction with gallium ions, the fluorescence color of a solution is changed from colorless to green under irradiation of ultraviolet light with the wavelength of 365 nm, and the fluorescence of the solution is changed from green to colorless after glyphosate and the gallium ions have a stronger coordination effect, so that the fluorescence of the solution is changed from green to colorless after the glyphosate is added into the solution. Therefore, the compound can be used as a fluorescent probe for continuously detecting gallium ions and glyphosate.

The invention provides a process and a device for purifying byproduct waste hydrochloric acid generated by incineration of tail gas in production of methyl chlorosilane. The waste hydrochloric acid is firstly subjected to plate-frame pressure filtration to remove most fumed silica and other large-particle impurities, then is subjected to precision filtration to remove residual fumed silica and other solid impurities, then is subjected to special adsorption material to remove metal ions, and finally is filtered by a filter to obtain clear and transparent hydrochloric acid. High-purity hydrochloric acid can be obtained by purifying the waste hydrochloric acid, and the method has remarkable economic benefits and environmental protection benefits.

The application belongs to the technical field of solar cells, and discloses a perovskite solar cell, a preparation method and application thereof. The perovskite solar cell comprises, from bottom to top, a flexible conductive substrate, a hole transport layer, a perovskite active layer, a passivation layer, an electron transport layer and a metal electrode layer. The perovskite active layer comprises APbX3. A comprises at least one of formamidinium ion, methylamine ion, cesium ion and potassium ion. X comprises at least one of chloride ion, bromide ion and iodide ion. The passivation layer comprises 2-ethyl-2-phenyl malonic acid diethyl ester. The solar cell has excellent photoelectric conversion efficiency and long-term stability, and can be used to prepare photovoltaic modules and electronic devices. In addition, the preparation method is simple and easy to implement, does not require complex equipment and processes, can effectively control the thickness of each layer, is used to prepare large-area high-performance perovskite solar cells, and meets the needs of industrial production.

The present invention belongs to the technical field of electron paramagnetic resonance and dynamic nuclear polarization, and specifically discloses a method for narrowing the ESR line width of light-induced free radicals applied to melt dynamic nuclear polarization. The method of the present invention adopts an α-dicarbonyl-containing and a methylene-containing β-dicarbonyl structure as a light-induced free radical precursor as shown in the following formula. The α-dicarbonyl structure can generate light-induced free radicals at liquid nitrogen temperature, and the methylene-containing β-dicarbonyl structure is prone to keto-enol interconversion in the solution. The aforementioned light-induced free radical precursor is dissolved to contain a certain amount of active D + In a solvent, during the keto-enol interconversion process, D gradually replaces the H on the methylene in the β-dicarbonyl to obtain a methylene-deuterated keto structure, which can be illuminated at liquid nitrogen temperature to obtain a deuterated free radical with a narrower ESR line width than the undeuterated structure.

The application discloses an electrochemical aptamer sensor for simultaneously detecting Cd 2+ and Hg 2+ as well as a preparation method and application thereof. The electrochemical aptamer sensor comprises a multi-walled carbon nanotube and gold nanoparticle composite modified silk screen printing electrode, methylene blue-labeled MB-Apt is coupled to the electrode surface through gold-sulfur bond covalent action, and Cd 2+ detection is realized through MB electrochemical signal change; ssDNA and MB-Apt jointly capture Hg 2+ , silver nanoclusters are generated in-situ in the C-rich sequence of the ssDNA, and Hg 2+ detection is realized through electrochemical signal change of the silver nanoclusters; standard solutions with different concentrations are prepared by diluting Cd 2+ and Hg 2+ standard stock solutions, a standard curve of concentration and electrochemical signal is determined; after being pretreated, actual samples to be measured are added to the electrochemical biosensor, electrochemical signals are determined, and the concentration of the measured substance is calculated according to a linear model, so that specific, sensitive and rapid detection of the two heavy metal ions can be realized.

The invention belongs to the technical field of analysis and detection, and discloses a method for detecting hexavalent chromium ions. The method for detecting the hexavalent chromium ions comprises the following steps: (1) adding disodium ethylene diamine tetraacetate, acid, hydrogen peroxide and 3, 3 ', 5, 5'-tetramethyl benzidine into the hexavalent chromium ions with multiple concentrations, uniformly mixing and reacting, measuring the absorbance of a system, drawing a standard curve and calculating to obtain a linear equation; the final concentration of the disodium ethylene diamine tetraacetate is 10 [mu] mol / L to 500 [mu] mol / L; and (2) measuring the absorbance of a sample to be measured by using the method in the step (1), substituting the absorbance into the linear equation, and calculating to obtain the content of hexavalent chromium ions in the sample to be measured. The detection method is high in accuracy, good in stability, green and environment-friendly while detection can be completed within a short time, few wastes are generated, post-treatment is simple and easy to operate, the method is environment-friendly, and the method has wide application prospects in the fields of environment monitoring, water quality detection and the like.

The invention discloses a method for preparing an asymmetric polyaryl ether cluster luminescent material, wherein the cluster luminescent material has a structure as shown in the following formula 1 or formula 2: wherein R is H, an electron-donating group or an electron-withdrawing group; the electron-donating group is dimethylamino, methoxy or diphenylamino; the electron-withdrawing group is halogen, cyano, trifluoromethyl or nitro; triphenylchloromethane is attacked by DBU to form a trityl carbonium ion, which is then reacted with a polyaryl secondary alcohol or primary alcohol substrate to obtain the cluster luminescent material. The preparation method does not require strict reaction environment control, does not require a metal catalyst, and has the advantages of being green and economical, simple reaction, high selectivity and high yield.

The invention provides an adsorbent for adsorbing sulfur dioxide and nitrogen oxides in coke oven flue gas and a preparation method thereof.The preparation method comprises the following steps that S1, magnesium acetate and 2, 5-dihydroxyterephthalic acid are dissolved in a solvent, a solvothermal reaction is conducted, and after the reaction is finished, filtering is conducted to obtain yellow crystals; s2, washing the yellow crystal with N, N-dimethylformamide, filtering the yellow crystal, soaking the yellow crystal in methanol, filtering the yellow crystal, and carrying out vacuum drying to obtain Mg-MOF-74; and S3, coating the Mg-MOF-74 with a methyl red dye, and then sequentially and respectively irradiating the Mg-MOF-74 with ultraviolet light and visible light, so as to obtain the Mg-MOF-74 adsorbent with the pore size of 0.3-0.5 nm. The adsorbent can effectively adsorb sulfur dioxide and nitrogen oxide in coke oven flue gas, the adsorption effect is good, and near-zero emission can be achieved.

The invention discloses a preparation method of perfluoro-2, 3-dimethyl-2-pentene, which comprises the following steps of: initiating a trifluoromethylation reagent to generate trifluoromethyl ions by using an initiator containing fluorine ions or carbonate ions in an aprotic solvent by adopting a continuous flow micro-reaction process; then, the trifluoromethyl ions and the perfluoro-2-methyl-2-pentene are subjected to a reaction, and the perfluoro-2, 3-dimethyl-2-pentene is generated. The method is short in reaction time, high in preparation efficiency, simple in process, low in cost, few in three wastes, high in product yield and suitable for industrial production.

The application discloses a hydrogen peroxide etching solution for liquid crystal panels and a preparation method thereof, and belongs to the technical field of etching solutions, and aims to solve the technical problem that in the prior art, in order to improve the corrosion inhibition rate of the etching solution itself, a certain amount of metal corrosion inhibitor is added to deposit a film; however, the synthesized metal film layer hinders the etching efficiency of the etching solution. The hydrogen peroxide etching solution for liquid crystal panels comprises a hydrogen peroxide solution, a hydrochloric acid solution, a copper corrosion inhibitor and a chelating agent; the copper corrosion inhibitor is obtained by reaction of an intermediate II and allyloxy polyoxyethylene ether, the intermediate II is obtained by reaction of an intermediate product I and 3-amino methyl thiophene, and the intermediate product I is obtained by reaction of 5-chloro-2-methylbenzoic acid and propargylamine. The hydrogen peroxide etching solution for liquid crystal panels prepared by the application has high etching rate and still has excellent corrosion inhibition effect.

The application discloses a colorimetric and ratiometric fluorescent probe compound based on aggregation-induced emission and a preparation method and application thereof, and belongs to the technical field of analysis and detection. The colorimetric and ratiometric fluorescent probe compound is 5-((5-(4-(diphenylamino)phenyl)thiophene-2-yl)methylene)-2,2-dimethyl-1,3-dioxane-4,6-dione. The colorimetric and ratiometric fluorescent probe provided by the application uses an electron-rich double bond as a recognition group, can specifically undergo a nucleophilic addition reaction with sulfite and bisulfite ions, and can accurately and efficiently recognize the sulfite and bisulfite ions. The colorimetric and ratiometric fluorescent probe compound provided by the application is simple in synthesis, easy to prepare, and high in detection sensitivity. The product after response of the colorimetric and ratiometric fluorescent probe provided by the application has dual characteristics of aggregation-induced emission and intramolecular charge transfer, can emit strong fluorescence in a high-concentration aggregation state, and will not have an aggregation quenching phenomenon like traditional fluorescent probes.

The invention discloses a magnetic imprinted polymer for separating perrhenate ions as well as a preparation method and application of the magnetic imprinted polymer, and belongs to the field of hydrometallurgy. The method comprises the following steps: firstly, preparing Fe3O4 (at) mSiO2, and then carrying out sulfydryl modification on the Fe3O4 (at) mSiO2 by utilizing 3-mercaptopropyltrimethoxysilane (MPTMS), so as to obtain the Fe3O4 (at) mSiO2 (at) S-H microspheres. Then by taking perrhenic acid radical (ReO4) as template ions, N-vinyl imidazole (NVI) as a functional monomer, N 'N-methylene bisacrylamide (MBA) as a cross-linking agent, benzoin dimethyl ether (DMPA) as a photoinitiator and a mixed solution of water and ethanol as a pore-forming agent, carrying out hydrothermal reaction to obtain a porous polymer; the perrhenate ion magnetic imprinted polymer (ReO4--MIIPs) with high selectivity and high adsorption capacity is prepared by adopting a sulfydryl-alkene click polymerization method. And the rhenium is used as an adsorbent for enriching and recovering rhenium elements in a rhenium-containing secondary resource solution, so that the separation effect and the recovery efficiency of rhenium are remarkably improved. Compared with a traditional perrhenic acid radical ion imprinting material, the magnetic ion imprinting polymer prepared by combining an ion imprinting technology with a magnetic separation technology is good in stability, high in selectivity, large in adsorption capacity, high in adsorption rate, high in desorption rate and good in regeneration performance; reO4 <-> ions in a rhenium-containing secondary resource solution can be directionally separated, extracted and recycled, and a solution is provided for efficient recovery of secondary resource valuable metals.

The present invention discloses a coumarin-based ratiometric fluorescent probe for detecting mercury ions, its preparation method and application, belonging to the technical field of mercury ion detection. The present invention uses 2,4-dihydroxybenzaldehyde as a raw material, and undergoes a condensation cyclization reaction with 4-hydroxy-6-methylpyran-2-one to prepare 1-(7-hydroxy-coumarin-3-yl)-1,3-butanedione; 1-(7-hydroxy-coumarin-3-yl)-1,3-butanedione then undergoes an aldol condensation reaction with 4-diphenylaminobenzaldehyde to obtain a coumarin-based ratiometric fluorescent probe. Under the irradiation of a 365 nm ultraviolet lamp, the coumarin-based ratiometric fluorescent probe solution emits orange fluorescence. After adding Hg<supgt;2+< / supgt; to it, the fluorescence color of the solution changes from orange to blue, and the detection limit for Hg<supgt;2+< / supgt> reaches 2.24×10<supgt;‑7< / supgt> mol / L, having good application prospects as a fluorescent probe for detecting Hg<supgt;2+< / supgt> ions.

The invention discloses a process method for preparing clofoconazole through a continuous flow microchannel, comprising four steps of etherification and acylation to prepare 1-[4-(4-chlorophenoxy)-2-trifluoromethylphenyl]ethanone, epoxidation to prepare 2-[4-(4-chlorophenoxy)-2-trifluoromethylphenyl]-2-methyloxirane and ring-opening substitution to prepare clofoconazole. The process of the invention has key and dangerous process steps, and is prepared by using a continuous flow microreactor, has the advantages of good atom economy, high yield and preparation efficiency, and greatly improves the intrinsic safety of the process.

The invention relates to a water-based phenolic aldehyde amine epoxy curing agent as well as a preparation method and application thereof, and belongs to the technical field of curing agents. The water-based phenolic aldehyde amine epoxy curing agent is prepared from methylene ammonium ions, a phenol reactant and a polyether amine epoxy adduct through an addition reaction, and comprises components with a specific structural general formula, the preparation method comprises the following steps: reacting polyamine with urotropine to prepare methylene ammonium ions, and gradually adding a phenol reactant and a polyether amine epoxy adduct; the polyether amine epoxy adduct is prepared by carrying out ring-opening addition reaction on polyether amine and epoxy resin. The curing agent provided by the invention can ensure that formaldehyde residues are avoided in the preparation process, the use safety of the phenolic aldehyde amine epoxy curing agent is greatly improved, meanwhile, the curing agent has proper flowability, reaction activity and water resistance, the corrosion resistance, mechanical property and chemical resistance can be regulated and improved, and the curing agent has very high application value.