391 results about "Phenanthroline" patented technology

The invention relates to the technical field of detection kits, in particular to a preparation method of fluorescent microspheres, the fluorescent microspheres and a preparation method of a kit. According to the invention, 4-vinylbenzoic acid, dibenzoylmethane and phenanthroline are used as ligands to prepare the europium complex; the prepared europium complex, styrene and lauryl methacrylate are subjected to first-stage copolymerization polymerization to obtain a polymer core with the europium complex, itaconic acid is added for continuous polymerization in the second-stage polymerization process, and the prepared fluorescent microspheres are uniform in size, high in fluorescence intensity and high in stability. The prepared detection kit has the advantages of high detection sensitivity and stable and reliable detection effect when being used for detecting the myocardial injury marker cTnI.

The invention discloses preparation of a phenanthroline-based covalent organic framework photocatalyst and application of the phenanthroline-based covalent organic framework photocatalyst in photocatalytic production of hydrogen peroxide. According to the method, a hydrogen peroxide production experiment is carried out in a water-oxygen system or a benzyl alcohol-water-oxygen system by taking phenanthroline-based COF as a photocatalyst. According to the invention, through regulation and control of molecular flatness engineering, an electron-rich phenanthroline unit (Phen) anchored by a pyridine expansion plane and electron-deficient triazine (TTA) are integrated into a COF skeleton, and a novel electron donor-acceptor (D-A) type COF is synthesized. The COF has the advantages of proper energy band structure, excellent photo-induced electron and hole separation efficiency, strong D-A interaction, good hydrophilicity and the like, and the efficiency of photocatalytic hydrogen peroxide production reaction within a short time is greatly improved. The invention provides a use method of the COF photocatalyst which is cheap, convenient, rapid, efficient and environment-friendly, and has a potential application prospect.

The invention discloses a preparation method and application of a high-valence nickel monatomic catalyst, through the synergistic effect of nickel-phenanthroline complexing and inert template anchoring, dense and stable anchoring sites are provided for nickel atoms, atom migration and agglomeration in the high-temperature pyrolysis process are effectively inhibited, and the high-valence nickel monatomic catalyst is prepared. Meanwhile, by combining with an air-inert atmosphere two-step calcination procedure, air pre-oxidation is carried out, and a nickel precursor is stabilized in a carrier framework to prevent the nickel precursor from being reduced into a metal state in subsequent high-temperature inert calcination, so that the nickel precursor is locked in an electron-deficient high valence state, and a nickel-loaded material with the nickel loading capacity of 2.9-9.2 wt% and the nickel loading capacity of 9.2-9.2 wt% is prepared. And the nickel element stably exists mainly in the form of Ni < 3 + > or a higher-valence monatomic form, so that the three-in-one breakthrough of high load, high valence and high stability is realized. When the obtained catalyst activates persulfate, high-valence metal oxygen species are preferentially generated, various new pollutants are degraded, and the catalyst has high activity, selectivity and high stability.

The invention belongs to the technical field of organic synthesis, and particularly relates to an asymmetric phenanthroline compound as well as a preparation method and application thereof. Compared with the original symmetric ligand compound, the asymmetric phenanthroline compound provided by the invention has the advantage that the extraction performance and selectivity of americium are improved. In addition, the asymmetric phenanthroline compound provided by the invention is stable in structure, has good acid resistance and radiation resistance, can be suitable for high-acidity post-treatment waste liquid, improves the fat solubility of the phenanthroline ligand, is easy to split phases, does not need to use 2-bromohexanoic acid and other synergistic extractants, and reduces the introduction of secondary wastes in the post-treatment process.

The invention discloses an organic rare earth luminescent complex scintillator as well as preparation and application thereof. The molecular structural formula of the complex is L13ML2, M is Tb, Eu or Er metal ions, and the valence state is + 3; l1 is a tetraphenyl diphosphine imide anion ligand (tpip) or a substituted tpip ligand; l2 is unsubstituted or substituted 2, 2 '-bipyridyl, 1, 10-phenanthroline and a non-ionic chelating group containing a polyheterocycle / fused heterocycle. The organic rare earth luminescent complex scintillator can effectively convert high-energy X-rays into narrow-band visible light and near-infrared light, and is suitable for being applied to the fields of high-energy ray detection and high-resolution imaging.

The invention discloses an imidazole derivative molecule modified solar cell and a preparation method thereof, and belongs to the technical field of solar cells. The cell sequentially comprises an ITO (Indium Tin Oxide) conductive glass layer, a nickel oxide passivation layer, a [4-(3, 6-dimethoxy-9H-carbazole-9-yl) butyl] phosphonic acid hole transport layer, an ITO (Indium Tin Oxide) conductive glass layer and a nickel oxide passivation layer from bottom to top, the thin film solar cell is characterized in that the thin film solar cell comprises a substrate, a metal Ag electrode layer, a Cs0.05 (FA0. 95MA0. 05) 0. 95Pb (I0. 95Br0. 05) 3 narrow-band gap perovskite thin film PVSK modified by 2-(2 ', 6'-dichloroanilino)-2-imidazoline, a (6, 6)-phenyl-C61-butyric acid methyl ester electron transport layer, a 2, 9-dimethyl-4, 7-biphenyl-1, 10-phenanthroline hole blocking layer and a metal Ag electrode layer; according to the scheme, perovskite defects are passivated through imidazole derivative molecules, double-interface passivation and crystallization regulation are achieved, the film quality is improved, and the crystal quality of the perovskite film is remarkably improved; due to effective passivation of the double interfaces, ion migration is obviously inhibited, the carrier transmission efficiency is effectively improved, and the moisture resistance of the perovskite thin film and the device stability are improved.

The invention provides a hydrogen fuel cell catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysts, the catalyst comprises an N atom modified carbon carrier and platinum alloy nanoparticles loaded on the surface of the carbon carrier, the platinum alloy nanoparticles are binary or multicomponent alloys formed by Pt and metal M, the molar ratio of platinum to the metal M is (0-10): 1, and the molar ratio of platinum to metal M is (0-10): 1. The weight ratio of the N atom modified carbon carrier to the platinum alloy nanoparticles is (25-80): (75-20). According to the preparation method of the hydrogen fuel cell catalyst, the N-modified carbon-supported PtFe alloy is prepared by a two-step pyrolysis method, so that the use amount of Pt is effectively reduced, the cost is controlled, and the utilization rate of Pt is increased; through the strong coordination capability of the 1, 10-phenanthroline, the formed Fe-N-C layer can restrain the growth and agglomeration of the PtFe alloy nanoparticles, the adsorption to a reaction intermediate is weakened, and the oxygen reduction activity and stability of the alloy catalyst are improved.

The invention belongs to the technical field of electrocatalytic nitrate reduction catalysts, and particularly relates to a graded porous hollow carbon fiber catalyst with synergistic monatomic iron and ferric oxide clusters as well as a preparation method and application of the graded porous hollow carbon fiber catalyst. The preparation method specifically comprises the following steps: stirring polyacrylonitrile and polymethyl methacrylate in an organic solvent to obtain a spinning precursor solution; the preparation method comprises the following steps: taking ferrous sulfate heptahydrate and 1, 10-phenanthroline as ligands, and stirring in an organic solvent to obtain a metal organic ligand; the preparation method comprises the following steps: stirring a spinning precursor solution and a metal organic ligand, obtaining a metal precursor-loaded composite fiber through an electrostatic spinning technology, and then carrying out pre-oxidation and high-temperature pyrolysis to obtain the composite fiber. The prepared carbon fiber has good conductivity and a unique hollow hierarchical porous structure, transmission of reactants is greatly promoted while more active sites are exposed, the carbon fiber serves as a monatomic synergistic cluster catalyst carrier, rapid transmission of electrons is facilitated, and the electro-catalysis efficiency is effectively improved.

Electrically neutral complex compounds of formula I including any stereoisomer or E / Z isomer thereof wherein: M is Fe < 2 + >, Ru < 2 + >, Os < 2 + >, Co < 3 + >, Rh < 2 + >, Rh < 3 + >, Ir < 3 + >, Ni < 2 + >, Pd < 2 + >, Pt < 2 + > or Pt < 4 + >, in particular Ru < 2 + >; t and T'are H or (C1-C3)-alkyl; lig is a bidentate ligand, in particular 2, 2 '-dipyridyl (bpy) or 4, 7-diphenyl-1, 10-phenanthroline (BPhen); and A is an anion from a pharmaceutically acceptable acid, the electrically neutral complex compounds of formula I are useful in human therapy, in particular as photosensitizers (PS) in photodynamic therapy (PDT) of cancer, skin diseases, fungal infections or microbial infections. They are almost non-toxic under dark conditions at therapeutic doses and exhibit good to excellent photoactivity under hypoxic conditions. They can be used for PDT treatment of deep hypoxia tumors by using light within a far-infrared to near-infrared light treatment window.

The invention relates to the technical field of immunochromatography, in particular to time-resolved fluorescent microspheres, a preparation method and application of the time-resolved fluorescent microspheres in PSP / CRP / MxA quantitative detection immunochromatography test strip, and the preparation method of the time-resolved fluorescent microspheres comprises the following steps: 1) preparing surface aminated polystyrene microspheres; (2) carrying out glutaraldehyde crosslinking and 1, 10-phenanthroline-5-amino combination; 3) grafting a rare earth fluorescent dye on the surface; and 4) coating a polymer shell layer and modifying carboxyl. According to the invention, through a dual fixation strategy of surface grafting and polymer coating, the time-resolved fluorescent dye is confined to a functional region between the surface of the microsphere and a polymer shell layer, diffusion and leakage of dye molecules to the external environment are blocked, and the problem of dye shedding of traditional fluorescent microspheres is solved; the polymer shell layer can effectively isolate external ultraviolet light, oxygen and other corrosive factors, reduce photooxidative degradation and non-radiative transition loss of fluorescent molecules, and improve the light stability and fluorescent lifetime of the fluorescent molecules.

The invention discloses application of nitrogen-doped bamboo activated carbon in room-temperature oxidation of methyl mercaptan, and belongs to the technical field of sulfur-containing foul pollutant treatment. According to the catalyst, bamboo charcoal is used as a carbon source, 1, 10-phenanthroline or ammonia gas and 1, 10-phenanthroline are used as nitrogen sources, and the nitrogen-doped bamboo activated carbon catalyst is prepared through mixed grinding and high-temperature calcination. The nitrogen-doped bamboo activated carbon prepared by the method has abundant topological defects and structural alkaline sites, and has remarkable advantages in the aspect of oxidative degradation of methyl mercaptan at room temperature. The catalyst can realize catalytic degradation of methyl mercaptan at room temperature, can still keep the degradation rate of 85% or above after continuous reaction for 150 hours, and shows excellent catalytic activity and stability.

The invention discloses an antibacterial nanofiber hemodialysis membrane and a preparation method thereof, and relates to the technical field of dialysis membranes, and the preparation method comprises the following steps: mixing a chitosan derivative, heparin, dopamine, an unsaturated monomer and an initiator in a DMF / phosphate buffer mixed solution to obtain a surface treating agent; taking the polyethersulfone nanofiber membrane as a supporting layer, dipping in a surface treating agent, and performing UV irradiation to form a functional layer, thereby obtaining the dialysis membrane. The preparation method comprises the following steps: compounding phenanthroline cerium triacrylate hybridized CeO2 with N-vinyl pyrrolidone, sodium p-styrenesulfonate and lauryl methacrylate to obtain an unsaturated monomer, compounding the unsaturated monomer with a chitosan derivative, heparin and dopamine to prepare a surface treating agent, impregnating a polyether sulfone nanofiber membrane, and carrying out irradiation curing to form a functional layer. The prepared hemodialysis membrane has efficient anticoagulation and broad-spectrum antibacterial properties, high permeability, low protein adsorbability and long-term stability.

Disclosed in the present invention are an ion-conjugated material and a metal coordination material thereof, and the antibacterial use thereof, wherein 2,9-diformyl-1,10-phenanthroline and 1,2,3-triaminoguanidine hydrochloride are brought into a reaction to prepare an ion-conjugated material, and metal ions are coordinated on the ion-conjugated material to form a new metal coordination covalent organic framework material, which has an efficient antibacterial and sterilizing performance against Escherichia coli and Staphylococcus aureus, and a greatly improved sterilizing performance under light irradiation. Specifically, in practice, the sterilizing rate against Escherichia coli and Staphylococcus aureus can reach 99% or more; furthermore, under irradiation with an ultraviolet lamp, the sterilizing performance against high-concentration bacteria is greatly improved.

The application discloses a method for synthesizing a single-atom catalyst, which comprises the following steps of mixing raw materials: taking dimethyl imidazole, zinc nitrate and graphene oxide as solutes, and taking anhydrous methanol as a solvent to form ZIF-8@GO through stirring; taking ZIF-8@GO and thiourea as solutes, and taking anhydrous methanol as a solvent to form S / ZIF-8@GO through stirring and adsorption; first-stage pyrolysis: pyrolyzing S / ZIF-8@GO in a protective gas atmosphere to form porous carbon (S, N-C); precursor preparation: after the porous carbon is cooled, phenanthroline (Phen) and a transition metal source (M) are added into the porous carbon to form a precursor M / S, N-C@Phen; and second-stage pyrolysis: pyrolyzing the M / S, N-C@Phen precursor in a protective gas atmosphere to obtain a M / S, N-C single-atom catalyst. The synthesis method is simple and effective, can be used for large-scale synthesis of a single-atom catalyst, is suitable for synthesis of various metal single-atom catalysts, and solves the problems of complexity in the prior art and difficulty in large-scale preparation.

The invention discloses a metal organic framework derived carbon coated iron-cobalt alloy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing an iron-based metal organic framework, phenanthroline, cobalt salt and an organic solvent into a precursor mixed solution, and performing solvothermal reaction and pyrolysis to obtain the iron-cobalt alloy catalyst. According to the preparation method disclosed by the invention, cheap and easily available raw materials are adopted, and the green and environment-friendly metal organic framework derived carbon coated iron-cobalt alloy catalyst which is large in specific surface area, rich in active sites, stable in structure and excellent in catalytic performance can be prepared through a mild solvent volatilization-calcination two-step method; the method can be used for advanced treatment of organic pollutant wastewater, can realize efficient removal of organic pollutants, and is high in use value and good in application prospect. According to the preparation method disclosed by the invention, the iron-based metal organic framework is directly used as an iron source, so that additional addition of iron salt is avoided, the risk of iron precipitation and impurity introduction is fundamentally eliminated, and pH regulation is not needed.

The application provides an In-MOF crystal material and a preparation method and application thereof, and the molecular formula of the In-MOF crystal material is [In(phen)(BDC) 1.5 ]·H2O, wherein phen is 1,10-phenanthroline, and BDC is terephthalic acid ligand; the crystal belongs to a monoclinic crystal system P2 1 / n with a space group, and the cell parameters are alpha=90°, beta=97.774(2)°, gamma=90°, a=12.3359(3)Å, b=14.1993(4)Å, c=15.4995(4)Å, the cell volume is 2689.96(12)Å 3 , and Z=4. The application synthesizes an In-MOF crystal material by using a simple room temperature solvent evaporation method, and the In-MOF crystal material can be used as a catalyst for electrocatalytic carbon dioxide reduction, and realizes efficient carbon dioxide reduction to form formic acid.

A 1,10-phenanthroline derivative or a 2,2′-bipyridine derivative having different substituents at symmetrical positions is provided. An organic compound represented by General Formula (G1) or General Formula (G2) below is provided. In General Formula (G1) or (G2) below, any one of X2 to X5 or any one of X6 to X9 represents a halogen or a trifluoromethanesulfonyl group, and the others represent hydrogens. Any one of R2 to R5 or any one of R6 to R9 represents an aliphatic cyclic amino group. Note that a carbon to which the halogen or the trifluoromethanesulfonyl group is bonded and a carbon to which the aliphatic cyclic amino group is bonded are at line-symmetrical positions in a main skeleton (a 1,10-phenanthroline skeleton or a 2,2′-bipyridine skeleton).

The application provides an alloying modification method of a platinum catalyst, relates to the field of electrochemical catalysis, and particularly relates to the following steps: mixing 5% of a platinum carbon catalyst and a phytic acid solution uniformly, performing freeze-drying treatment, performing one-time pyrolysis, sulfuric acid treatment, and ultra-pure water cleaning and suction filtration, and drying to obtain a powder; adding ferrous sulfate and 1,10-phenanthroline, performing second-time pyrolysis, sulfuric acid treatment, and ultra-pure water cleaning and suction filtration, and drying to obtain an alloying modification carbon-based catalyst. The method is alloyed by the metal platinum and a transition metal, effectively improves the activity and stability of the catalyst, reduces the use amount of the noble metal platinum, and effectively reduces the manufacturing cost of the catalyst; and the alloying modification carbon-based catalyst obtained by the method can be used for the preparation of a primary zinc-air battery, a rechargeable zinc-air battery and the like.

This invention belongs to the field of catalyst technology, and relates to a metal ligand catalyst and a method for preparing lactic acid. The metal ligand catalyst is a complex formed by a metal and a ligand; the metal is one or more of manganese, copper, zinc, and molybdenum; the ligand is phenanthroline, pyridine, phosphine ligand, or nitrogen-phosphine ligand. The catalyst provided by this invention is low in cost, has relatively mild reaction conditions, is simple to prepare, and exhibits high selectivity for the preparation of lactic acid.

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 present application relates to the technical field of electroluminescent device preparation, in particular to an OLED light-emitting composition and an electroluminescent device comprising the composition. The OLED light-emitting composition comprises an electron transport material and a light-emitting material, the electron transport material combines o-phenanthroline and a xanthene group, and has high electron mobility and a low energy level. A boron-nitrogen compound skeleton structure with multiple benzene rings is introduced into the light-emitting material, the skeleton structure is twisted in a planar configuration, the alkyl substituents contained in the large steric group are adjusted, the π-π mutual attraction caused by the introduction of benzene rings is weakened, the intermolecular force is further weakened, and the adverse effects of concentration quenching on efficiency are weakened. The OLED device prepared by using the composition of the present application has low starting voltage, high light-emitting efficiency and better service life, can meet the requirements of current panel manufacturing enterprises for high-performance materials, and has great commercial value.

The application discloses a method for regionally selective C3-H alkyne of triazolopyridazine compounds, and belongs to the field of organic synthesis. The method uses triazolopyridazine and high-valence iodine (III) alkyne reagent as raw materials, and a double catalytic system composed of Ph3PAuNTf2 (5 mol%), AgOTf (5 mol%) and 1,10-phenanthroline (20 mol%) in dichloromethane, and after reaction at 50 DEG C, the C3 alkyne product is obtained through purification. The method solves the problems of catalyst deactivation and poor selectivity caused by nitrogen-rich heterocyclic rings through gold / silver synergistic catalysis, and realizes precise functionalization of the C3 position. The reaction condition is mild, the substrate is widely applicable (R¹ contains various aryl groups and heteroaryl groups, and R² is compatible with different substituted aryl groups), the yield is 60% to 95%, the step is economical, and the method is suitable for large-scale preparation.

The application relates to the technical field of photoelectric functional materials, in particular to an interface modification layer material and a synthesis method and application thereof. The interface modification layer material provided by the application increases the steric hindrance of the molecule by introducing a functional group at the para-position of the benzene ring in the BPhen molecular structure, and reduces the aggregation and crystallization of the molecule; the molecular weight of the synthesized phenanthroline derivative is large, the glass transition temperature is higher than that of BPhen, and the thermal stability of the material is better; the synthesized phenanthroline derivative exists in the form of ionized quaternary ammonium salt, the reactivity of the imine group in the molecular structure is weaker than that of BPhen or BCP, and the stability of the device is improved; and the synthesis method of the interface modification layer material provided by the application is simple, the yield is high, the purification is easy, the price is low, and the interface modification layer material can be prepared on a large scale. The interface modification layer material can be applied in a semiconductor photoelectric device, and is used as an electrode modification layer to reduce the electrode work function.

This invention discloses a method for preparing and applying a class of highly efficient catalytic materials for activating persulfate. The preparation method includes: dispersing g-C3N4 in nitric acid at room temperature, stirring, washing, and drying to obtain g-C3N4-H; placing it in an inert atmosphere and treating it at high temperature to obtain a g-C3N4 substrate; mixing it with iron salt, cobalt salt, water, and 1,10-phenanthroline to obtain a suspension; evaporating to dryness, grinding, drying, treating at high temperature, dispersing in nitric acid, washing, drying again, treating at high temperature in an inert atmosphere, and naturally cooling to obtain FeCo-g-C3N4 catalytic material. The method of this invention constructs structurally stable and highly dispersed FeCo bimetallic-nitrogen-carbon active centers on the g-C3N4 substrate; it can achieve efficient degradation of pollutants with low dosage, while the metal leaching rate is extremely low, avoiding secondary pollution; this catalytic material combines high activity, high stability, environmental friendliness, and operational economy, showing outstanding application potential in the field of advanced oxidation water treatment.

The invention provides a waste lithium iron phosphate direct regeneration method based on a 1, 10-phenanthroline organic lithium system and application of the waste lithium iron phosphate direct regeneration method in a battery, and relates to the technical field of positive electrode material repair and regeneration. The method comprises the following steps: reacting in an organic lithium reagent consisting of 1, 10-phenanthroline lithium and tetrahydrofuran to realize the supplement of active lithium and the recovery of lithium iron antiposition defects, and carbonizing organic matters remained on the surface of lithium iron phosphate while recovering lithium iron phosphate crystal lattices by virtue of roasting; and an amorphous carbon layer wrapping the lithium iron phosphate particles is formed so as to improve the conductivity of the lithium iron phosphate material and further improve the electrochemical performance of the battery. Compared with traditional pyrogenic process regeneration and wet process regeneration, the direct regeneration method provided by the invention has the advantages of simple operation and low energy consumption, has certain competitiveness in economic benefit, does not need high-pressure steam operation, and is high in safety.

This application discloses a phenanthroline benzimidazole-structured polyimide single rare-earth ion coordination full-spectrum luminescent material, its preparation method, and its applications, belonging to the field of polymer luminescent material preparation technology. This phenanthroline benzimidazole-structured polyimide single rare-earth ion coordination full-spectrum luminescent material comprises a phenanthroline benzimidazole-structured polyimide, a rare-earth ion, and a β-diketone-structured small organic molecule ligand bound through coordination. This polymer single rare-earth coordination material retains the advantages of polyimide while exhibiting the characteristics of rare-earth ions (Ln... 3+ The addition of ) brings special optical properties, coordination polymers and rare earth ions Tb 3+ PI-Tb formed after coordination 3+ It can emit full-spectrum white light (CIE = (0.31, 0.35)) and exhibits excellent thermal stability and solubility.

The invention discloses a preparation method and application of a cobalt-nitrogen-doped mesoporous carbon catalyst, and belongs to the technical field of catalyst preparation, and the preparation method comprises the following steps: mixing and grinding glucose and an SBA-15 mesoporous molecular sieve, pyrolyzing in a nitrogen atmosphere, soaking the obtained product in hydrofluoric acid to remove an SBA-15 template, alternately centrifuging with water and ethanol to obtain a precipitate, and drying to obtain the cobalt-nitrogen-doped mesoporous carbon catalyst. Mesoporous carbon is obtained; the preparation method comprises the following steps: respectively dissolving phenanthroline and cobalt chloride hexahydrate in ethanol, and mixing to form a Co-phen solution; and soaking the obtained mesoporous carbon in a Co-phen solution, evaporating the solvent after soaking, grinding into powder, and carrying out heat treatment in a nitrogen atmosphere to obtain the cobalt-nitrogen doped mesoporous carbon catalyst. The cobalt-nitrogen-doped mesoporous carbon catalyst shows excellent oxygen reduction catalytic activity under the alkaline condition, the half-wave potential reaches 0.873 V and is close to a 4-electron transfer path, and the stability and methanol tolerance are superior to those of a commercial Pt / C catalyst.

The invention discloses a supported bimetallic complex catalyst for synthesizing isovanillin and a preparation method and application thereof.The catalyst is composed of an inorganic porous carrier and an active component supported on the inorganic porous carrier, and the active component is a bimetallic complex formed by Cu, Co and 1, 10-phenanthroline; the inorganic porous carrier is an SBA-15 molecular sieve or amino-modified Fe3O4 (at) SiO2 magnetic nanoparticles with a core-shell structure. The catalyst is prepared from a metal salt, a ligand and a carrier in a solvent through a coordination-loading one-step method. The catalyst disclosed by the invention is applied to one-step synthesis reaction of isovanillin by taking heliotropin and sodium methoxide or potassium methoxide as raw materials, and shows extremely high catalytic activity and product selectivity (yield gt; and by virtue of the load-type characteristic, especially the application of the magnetic carrier, rapid magnetic separation and recovery and repeated recycling can be realized, so that the catalyst is obviously superior to a traditional homogeneous copper chloride catalytic system, and has the potential of simple steps, environment friendliness and suitability for industrial production.

The present invention relates to the technical field of organic chemistry, and discloses a preparation method of 9-phenanthrene formic acid, wherein the preparation method comprises the following steps: using phenanthrene as a main raw material, iron bromide or zinc bromide as a catalyst, reacting with hydrobromic acid and hydrogen peroxide at 20 to 50 ° C to generate 9-bromophenanthrene, 9-bromophenanthrene reacts with cyanide under a catalyst to generate 9-nitrile phenanthrene, and then hydrolyzing under alkaline conditions to obtain 9-phenanthrene formic acid. The present invention uses cheap and readily available raw materials such as phenanthrene, hydrobromic acid, hydrogen peroxide and sodium cyanide to prepare 9-phenanthrene formic acid, with low production cost, high conversion rate, good product quality, mild reaction conditions, low equipment requirements, and can be used for large-scale industrial preparation of 9-phenanthrene formic acid.

The present application discloses a plasma cutting protection fluid and its preparation method, application, and use method. The plasma cutting protection fluid comprises the following components, by mass: 10-20 parts of a water-soluble resin, 0.3-1 parts of a UV absorber, 20-30 parts of an organic solvent, 0.5-1 parts of a corrosion inhibitor, 2-4 parts of an auxiliary agent, and 30-50 parts of ultrapure water. (E)-2-styryl-1H-phenanthro[9,10-d]imidazole is synthesized using 1,10-o-phenanthroline-5,6-diketone and cinnamaldehyde as raw materials. (E)-2-styryl-1H-phenanthro[9,10-d]imidazole is added to the plasma cutting fluid formula as a small molecule corrosion inhibitor. The prepared protection fluid, after spraying into a film, can form a uniform and complete coverage of the wafer and the surface bumps or grooves without corroding the metal on the wafer surface.