236 results about "Metal free" patented technology

This invention belongs to the field of catalytic material preparation technology, specifically relating to a method for preparing high specific surface area pure phase α-type molybdenum carbide by hydrogen intercalation modification of MoO3 and its application, including the following steps: (1) adding MoO3 powder to hydrochloric acid and dispersing it to prepare a mixture of MoO3 and hydrochloric acid; (2) adding metal powder to the mixture in step (1) and performing pre-reduction treatment by in-situ hydrogenation of the metal and hydrochloric acid to prepare H x MoO3 precursor; (3) H prepared in step (2) x The MoO3 precursor is carbonized under a carbon source gas to obtain a pure α-type molybdenum carbide with a high specific surface area. This method is simple and effective, avoids the use of corrosive NH3 gas during carbonization, and does not require a metal as a medium, thus solving the current problem of not being able to prepare metal-free modified pure α-MoC in one step.

The invention relates to a coated substrate, preferably coated tool for use in manufacturing processes, such as machining processes or forming processes, comprising a coated surface, said coated surface formed by a substrate surface made of a first material (1) and a coating system, preferably an arc-PVD-deposited coating system, applied on said substrate surface, said coating system comprising an amorphous carbon film (100), wherein the amorphous carbon film (100) is a tetrahedral hydrogen-free amorphous carbon film in which the share of the sp3 bond percentages of the C—C bonds exceeds that of the sp2 bond percentages. The invention further relates to a method.

The invention discloses a self-healing high-temperature anti-oxidation carbon-ceramic composite material, belongs to the technical field of ceramic-based composite materials, and particularly relates to a method for introducing a self-healing metal-element-free high-temperature anti-oxidation ceramic matrix into a carbon fiber preform. Then introducing a resin carbon matrix and a self-healing inorganic filler through two times of vacuum impregnation and high-temperature cracking, and finally preparing the SiC matrix by adopting high-temperature siliconizing. The carbon-ceramic composite material prepared by the invention does not contain metal impurities, has a self-healing function, and has a long-life anti-oxidation function in a range of 700-1000 DEG C.

The invention provides an antibacterial finishing agent and a preparation method and application thereof, and belongs to the technical field of textile assistants, the antibacterial finishing agent comprises the following raw materials: a chitosan-phytic acid-gallic acid graft copolymer, a citric acid-chitosan oligosaccharide cross-linking agent, sodium polyglutamate, a natural surfactant and water. During application, a padding-baking process is adopted, the finishing agent is diluted into 5-20 g / L working solution, the pH is 6-6.5, two times of padding and two times of rolling are performed, pre-drying is performed for 2-3 min at the temperature of 90-100 DEG C, baking is performed for 2-3 min at the temperature of 150-160 DEG C, an antibacterial layer which is resistant to washing more than or equal to 50 times and has the antibacterial rate more than or equal to 90% can be formed on pure cotton, pure hemp, pure silk and blended fabric thereof, and the finished fabric is soft in hand feeling, free of metal residues and biodegradable.

The invention belongs to the technical field of inorganic nano materials and electro-catalysis, and particularly relates to a cobalt-based spinel oxide nano material as well as a preparation method and application thereof. The cobalt-based spinel oxide nano material comprises a conductive substrate and cobalt-based spinel oxide grown on the surface of the conductive substrate, the molecular formula of the cobalt-based spinel oxide is MxCo1-xO4, and M is transition metal or P-region metal and is selected from one or more of titanium, vanadium, chromium, manganese, iron, nickel, aluminum, cerium and neodymium. Multiple metal elements are doped into a cobaltosic oxide lattice, and the intrinsic structure of spinel is not changed by metal doping. Multiple metal elements are highly uniformly dispersed in the material, so that active sites are comprehensively regulated and controlled, the material shows excellent thermodynamic and chemical stability under harsh conditions of high temperature, large current, concentrated alkali and the like, is suitable for various electrolysis modes, has no metal dissolution risk in long-term operation, can effectively avoid the problems of membrane poisoning and membrane degradation, and has good application prospects. Wide application prospects are shown.

The invention discloses a synthesis method of an oxazole derivative, and belongs to the technical field of chemical synthesis. The oxazole derivative is synthesized from a ketone ester compound and thiourea through a one-pot method, the required raw materials are cheap and easy to obtain, the experimental operation is simple, the reaction condition is mild, a metal catalyst and other reagents are not needed, and the defects that a metal catalysis synthesis method is used, for example, the catalyst is high in price, the reaction synthesis route steps are many, and the synthesis cost is low are overcome. The method has the advantages of mild reaction conditions, low reaction rate, unstable intermediate, low yield and the like, bypasses most complex synthesis steps of a metal-free catalytic synthesis method, and develops a simple, efficient, green and environment-friendly way for synthesizing the oxazole derivative. Under mild conditions, ketone ester substrates with different substituent groups have very strong compatibility, and a new green synthesis way is provided for synthesis of substituted oxazole.

The invention discloses a method for synthesizing a polysubstituted trifluoromethyl olefin compound from gem-difluoroallyl alcohol. The preparation method comprises the following steps: in a nitrogen (N2) atmosphere, sequentially adding a gem-difluoroallyl alcohol (R1R2OHCR3C = CF2) compound, acetic anhydride (Ac2O), a solvent dichloromethane (DCM) and a fluorine source pyridine hydrofluoride (Py.9HF) reagent into a 10mL Schlenk tube to obtain a mixture, stirring the mixture at room temperature (rt) until the reaction is finished, filtering, washing and drying to obtain the compound. A crude product obtained by the reaction is subjected to silica gel column chromatography separation to obtain the high-selectivity polysubstituted trifluoromethyl olefin compound. The preparation method disclosed by the invention can be carried out under mild conditions and is simple and convenient to operate, most of the adopted raw materials are simple and easily available or commercialized reagents, the reaction raw materials are easily available, the yield of the target product is high, the functional group compatibility of the product is good, and the application range of a substrate is relatively wide; the obtained polysubstituted trifluoromethyl olefin compound contains a plurality of functional groups such as trifluoromethyl, olefin and the like. The method provides a more efficient and safer new strategy for synthesizing the polysubstituted trifluoromethyl olefin under mild conditions, particularly, metal participation is avoided, a new opportunity is provided for green medicine synthesis, and the method is predicted to have wide application prospects in the fields of medicine research and development, natural product derivative synthesis, life science and the like.

The application belongs to the field of medicine synthesis, and particularly relates to a preparation method of mesopram racemate. First, 1-(4-methoxy-3-propoxyphenyl) ethan-1-one, methyl triphenylphosphonium bromide and alkali are reacted in a solvent under inert gas protection to obtain a styrene intermediate I; then the intermediate I, a BocNCl2 reagent and an alkali reagent are reacted in a solvent to generate the mesopram racemate. The method provided by the application has the advantages of short steps, low cost, no metal residue and mild reaction conditions, and is suitable for industrial production.

The invention belongs to the technical field of glycine preparation, and particularly discloses a preparation method of glycine. The method comprises the following steps: controlling the reaction temperature, efficiently synthesizing ammonium chloroacetate from chloroacetic acid and liquid ammonia in a reactor, carrying out catalytic ammonolysis on the ammonium chloroacetate and ammonia gas in a reactor filled with a solid catalyst to realize continuity and reinforcement of the process, and carrying out alcohol precipitation crystallization, separation and purification to obtain glycine. The solid catalyst provided by the invention has the advantages of simple preparation, reproducibility, long service life, no metal pollution, easily available raw materials, controllable cost, long-acting cyclic utilization, high efficiency, simple recovery and the like; the method for preparing glycine by using the solid catalyst solves the problems of high consumption, high recovery cost, low production and purification efficiency and pollution caused by the traditional catalyst, and is a key technology for green and low-cost industrial production of glycine.

This invention discloses a method for preparing a metal-doped anode material with high closed-pore ratio, comprising the following steps: pre-oxidation, liquid-phase coating, isostatic pressing, metal doping, and carbonization. By using glucose to liquid-phase coat pre-oxidized biomass char, followed by isostatic pressing to form a dense and uniform composite carbon framework, the pores are predominantly closed pores of 0.4-2 nm, and the carbon layer is tightly bonded to the matrix without cracks. Furthermore, by gas-phase doping with zinc, zinc is uniformly dispersed in the form of single atoms / clusters and embedded in the carbon lattice, forming a unique Zn-C coordination structure without metal particle agglomeration defects. Simultaneously, the high temperature of 1400-1600℃ promotes the migration of zinc atoms into the carbon lattice depth, improving the microcrystallinity of the carbon material while retaining sodium storage active sites, resulting in stronger structural stability and ultimately achieving a high closed-pore ratio, thereby improving the capacity and rate performance of the anode material.

The invention relates to an HHOF-TGU307 enhanced acrylic acid adhesive as well as a preparation method and application thereof, and belongs to the technical field of macromolecular functional materials. Aiming at the problem that the existing acrylic acid adhesive is difficult to meet the high-performance requirement in the aspects of bonding strength and mechanical property, and particularly the defects of insufficient bonding strength, easy aging, interface failure and the like in the emerging application fields of new energy and the like, HOF-TGU307 (hydrogen bond organic framework) is introduced into an adhesive system; the cohesive force and the adhesion capacity with a base material are obviously improved. The HOF-TGU307 material is a novel crystalline organic porous material with high specific surface area, high crystallinity and adjustable aperture, the HOF-TGU307 material shows unique solution processability and easy regeneration due to reversibility and flexibility of hydrogen bonds, and the HOF-TGU307 material has good biocompatibility and low cytotoxicity due to the metal-free characteristic; the characteristics enable the HOF to become a new platform of functional materials. The adhesive is formed by polymerization of two acrylic monomers in an ethanol solution through ultraviolet initiation, the process is simple and environment-friendly, and the obtained product has good storage and transportation stability. Performance tests show that the bonding strength of the adhesive on a PMMA (polymethyl methacrylate) base material can reach 1.36 MPa, and Fourier infrared spectroscopy and scanning electron microscope analysis verify good compatibility and dispersion state between HOF-TGU307 crystals and a polymer matrix. The adhesive provided by the invention has wide application prospects in the fields of structural bonding, photoelectric materials, automobiles, new energy and the like.

The invention relates to the technical field of organic chemistry, in particular to a method for synthesizing a benzothiophene coupling product through a non-metal-participated anchoring-migration strategy. The method comprises the following steps: taking a benzothiophene compound or a benzothiophene sulfoxide compound as a reaction substrate, mixing the reaction substrate with an aryl nucleophilic reagent in the presence of an anhydride activator and a solvent, and carrying out nucleophilic substitution reaction to obtain benzothiophene sulfonium salt; the preparation method comprises the following steps: mixing benzothiophene sulfonium salt with an organic solvent, and carrying out metal-catalysis-free intramolecular migration reaction to form a carbon-carbon bond at the C2 site of benzothiophene, thereby obtaining the benzothiophene coupling product. The preparation conditions are mild, the operation is simple and convenient, a traditional oxidation addition-reduction elimination process is replaced by an anchoring-migration strategy, protection of a noble metal catalyst, a complex ligand, strong base or inert gas is not needed, and the problems of high cost, metal residues, harsh reaction conditions and limited substrate applicability in the prior art are fundamentally solved.

Some fluid coupling devices described herein are configured for use in fluid systems for purposes of providing a single-use, aseptic disconnection functionality that substantially prevents fluid spillage when being disconnected. In some embodiments, the coupling portions cannot be functionally reconnected to each other after being disconnected from each other. Some fluid coupling device embodiments described herein include a fluid flow path that is a metallic-free. Moreover, some embodiments of the fluid coupling devices provided herein include no metal whatsoever. That is, the fluid coupling devices are entirely metal-free.

The invention belongs to the field of preparation of conjugated microporous polymers, and particularly discloses a method for synthesizing a conjugated microporous polymer through metal-free catalysis and application of the conjugated microporous polymer. According to the method, triphenylamine (TPA) is taken as a monomer, N-iodosuccinimide (NIS) is introduced to serve as an iodination reagent, the synergistic catalysis of trifluoromethanesulfonic acid (TfOH) is combined, and the synthesis of the conjugated microporous polymer (TPA-CMPs) is successfully realized under the condition that a metal catalyst is not needed. The obtained CMPs material has ultrahigh specific surface area and excellent iodine adsorption capacity, no metal participates in the whole process, the problems of high pollution, high cost and the like in the traditional metal catalytic synthesis process of CMPs are effectively solved, a new thought is provided for green chemical synthesis and functional material development, and the CMPs material has good application prospects in iodine vapor adsorption and iodine adsorption. The catalyst can also be applied to the fields of catalytic carriers, gas separation, environment restoration and the like and has wide application prospects.

The application belongs to the field of organic materials, and particularly relates to a kind of covalent organic framework materials and a synthesis method thereof.The method of the application uses metal-free organic phosphine as catalyst, and monomers containing amino functional groups and monomers containing aldehyde functional groups are obtained through condensation reaction to obtain the covalent organic framework materials.The method of the application can prepare a variety of aggregate states of COFs.

The invention discloses a carbon nitride quantum dot as well as a preparation method and application thereof, and the preparation method comprises the following steps: taking formamide as a precursor and a solvent, taking ammonia water as a doping reagent, taking H2O2 as a redox agent, and carrying out solvothermal reaction to obtain the carbon nitride quantum dot. Wherein the temperature of the solvothermal reaction is 160 to 180 DEG C. The preparation method disclosed by the invention is low in raw material cost, short in synthesis time and simple and convenient to operate, efficient batch production is realized, and the generated carbon nitride quantum dot has good stability, shows efficient peroxidase-like activity as a metal-free nano-enzyme, shows excellent catalytic ability in vitro, and has good application prospects. The compound has a great prospect in the aspect of tumor treatment.

The invention provides a CN (at) PDI-CS metal-free photocatalyst with a biomass-based D-A structure as well as a preparation method and application of the CN (at) PDI-CS metal-free photocatalyst, and belongs to the technical field of photocatalytic materials and environmental remediation. The preparation method of the CN (at) PDI-CS metal-free photocatalyst comprises the following steps: (1) mixing PTCDA, CS and imidazole, and carrying out a reaction 1 under a protective atmosphere to obtain PDI-CS; and (2) mixing the PDI-CS, the g-C3N4 and imidazole, and carrying out a reaction 2 to obtain the CN (at) PDI-CS metal-free photocatalyst. According to the catalyst disclosed by the invention, the charge separation efficiency and the visible light absorption capacity are synergistically enhanced through a D-A structure and an electronic push-pull effect, and the recombination rate of photon-generated carriers is reduced, so that the CN (at) PDI-CS material has efficient photocatalytic degradation performance.

The utility model relates to the technical field of sampling, in particular to a photovoltaic liquid additive sampling device without metal contact. Comprising a box body, two rodless air cylinders are installed in an assembly chamber of the box body, sliding blocks of the rodless air cylinders are connected with connecting frames, the tail ends of the connecting frames are connected with pressing plates, the pressing plates are in sliding fit with adjacent sampling chambers, supporting rods are arranged on the pressing plates, and blocking covers used for blocking through holes are rotationally arranged on the supporting rods. Sampling devices capable of extending into the corresponding sampling chambers are inserted into the blocking covers. By adopting the rodless cylinders, the corresponding pressing plates are driven to move up and down, so that the sealing performance between the pressing plates and the sampling chambers can be accurately controlled, leakage or cross contamination is avoided in the sampling process, and the sampling accuracy and reliability are improved; a plurality of samples can be sampled in a concentrated manner at the same time, so that the manual operation time is shortened, and the sampling efficiency is greatly improved.

The application is suitable for the technical field of scrap steel recycling, and provides a scrap steel iron processing and recycling device and a recycling process.The specific steps of the method are as follows: step one: pour the raw materials to be recycled into the recycling box, and the raw materials are scattered into the recycling box under the action of the scattering unit, and the magnetic force of the magnetic rod is generated to magnetically attract the steel iron under the control of the control box, and the raw materials that are not magnetically attracted fall into the recycling drawer; step two: start the pulling-out unit, the pulling-out motor rotates to drive the reciprocating screw rod to rotate, and the reciprocating sliding block is driven to move, so that the recycling drawer is pulled out; step three: start the lifting unit, the lifting cylinder drives the recycling drawer to move upward, and the recycling drawer is moved to the position where the inclined plate is flush, so that the recycling drawer is inclined, and the raw materials fall into the recycling box again; step four: send the recycling drawer back to the original position, pull out the blocking plate, and repeat the above steps until there is no metal in the recycling drawer, and the magnetic force of the magnetic rod disappears under the control of the control box, and the steel raw materials fall into the recycling drawer.

The application relates to a high-salt-resistant and shear-resistant double-network fracturing fluid thickening agent and a preparation method thereof, relates to the technical field of oilfield chemistry and fine chemistry, and comprises the following steps: crosslinking and polymerizing non-ionic monomers and a crosslinking agent under the action of an initiator to form a first network structure, and utilizing a flexible polymer filled in the first network structure to form a second network structure. The flexible polymer is alkyl phenol polyoxyethylene ether. The flexible chain in the alkyl phenol polyoxyethylene ether structure still retains the function of a "sacrificial bond", can absorb the damage of high shear and high temperature to the rigid network structure, and enables the system to still have good resistance performance under the condition of no metal crosslinking. Meanwhile, due to the existence of benzene rings in the alkyl phenol polyoxyethylene ether structure, the pi-pi stacking effect can be increased on the basis, the intermolecular force is strengthened, and the resistance of the double-network structure is further improved. The double-network fracturing fluid thickening agent is simple in preparation, excellent in performance and high in practical value.

The invention discloses a processing method for obtaining a fused quartz optical element with low surface metal impurity content, which sequentially comprises the steps of blank cutting, milling and grinding forming, laser pretreatment, fine grinding, rough polishing, acid pickling, two times of fine polishing and ion beam fine trimming. A silicon dioxide polishing solution is adopted for carrying out metal-pollution-free polishing, ultrasonic-assisted pickling is used for deeply removing metal impurities, and through the synergistic effect of zero-pressure fine polishing and non-contact ion beam fine trimming, the surface damage layer is finally removed, the surface shape precision is controlled, meanwhile, the content of the surface metal impurities is reduced to the ppb level, and the surface quality is improved. Particularly, the cerium element content is reduced by more than 90%, and an ultra-smooth surface with root-mean-square roughness superior to 0.5 nm is obtained. The method solves the technical problem that low surface roughness and low metal impurity content are difficult to consider in the traditional process, and is suitable for batch and stable manufacturing of high-end optical elements.

The invention relates to the technical field of quartz glass processing, in particular to a method for preparing a gold infrared reflecting layer on a quartz glass product, which comprises the following steps: S1, cleaning: cleaning the quartz glass product; s2, pre-treating: pre-treating the cleaned quartz glass product in a hydrofluoric acid solution for a certain time, and washing the quartz glass product after the pre-treatment is finished; s3, coating: uniformly coating the surface of the quartz glass product with the prepared gold coating, and drying to form a gold infrared reflecting layer on the surface of the quartz glass product; and S4, performing high-temperature heat treatment, namely performing high-temperature heat treatment on the dried quartz glass product at 950-1100 DEG C in an atmospheric environment. By optimizing the pretreatment process, the coating formula and the heat treatment process, the defects in the prior art are effectively overcome, high infrared reflectivity, strong binding force and excellent corrosion resistance are considered, metal impurity pollution is avoided, the process is simple and efficient, and the coating has wide application prospects in the high-end fields of semiconductors, aerospace and the like.

The invention belongs to the technical field of polymer synthesis, and discloses polyether as well as a preparation method and application thereof. The polyether has a structural general formula as shown in formula (I), n is an integer of 2-200, and R1 and R2 are the same or different organic groups. The preparation method comprises the following step: in an inert or air atmosphere, carrying out polymerization reaction on a binary alkyne aldehyde compound and a binary hydroxyl compound in an organic solvent to obtain the polyether. According to the invention, the alkyne aldehyde monomer is designed and synthesized, and the high reaction activity of the monomer enables the monomer to be polymerized with a hydroxyl compound under the condition of no metal catalysis. The method is simple and efficient, and the polymer with high molecular weight and good thermal stability can be synthesized. The obtained polyether contains an aldehyde group side chain, so that selective detection and high-sensitivity detection of hydrazine are realized; and the structure and the function of the polymer can be expanded through a post-modification way. Formula (I)

The invention belongs to the field of chemical homogeneous catalysis technology and chemical process, and provides an imidazolyl basic ionic liquid catalyst, and a preparation method and application thereof. The catalyst provided by the invention is obtained by carrying out quaternization reaction on N-methylimidazole and halogenated hydrocarbon (such as methyl iodide, bromoethane and the like) in a solvent to generate an intermediate halogen quaternary ammonium salt, and then carrying out ion exchange reaction on the intermediate, sodium hydroxide and an imidazole derivative (such as imidazole or 2-methylimidazole) in the solvent. The catalyst can be applied to catalysis of transesterification of methanol and propylene carbonate to prepare dimethyl cyclic carbonate, and has the advantages of efficient preparation process, mild reaction conditions, no metal, no pollution and simple catalytic system, and the highest yield of dimethyl carbonate can reach 95%.

This invention provides a method for preparing 4,1-disubstituted pyrrolo[1,2-a]quinoxaline-1-yl ketone derivatives, belonging to the field of organic synthesis technology. This invention uses 2-(1H-pyrrolo-1-yl)aniline compounds and α-carbonyl acids as reactants, employing only ammonium persulfate as an oxidant. Under metal-free catalysis, a one-pot tandem reaction is carried out to simultaneously complete the cyclization of the pyrrolo[1,2-a]quinoxaline nucleus and the C-1 acylation modification. The substituents at the 4- and 1-positions of the product can be flexibly controlled by changing the α-carbonyl acid with different structures. This method requires no pre-modified substrate, eliminates the need for metal catalysts, avoids the risk of metal residue, and features simplified steps and high functional group compatibility, providing a new green and low-cost route for the synthesis of polysubstituted pyrrolo[1,2-a]quinoxaline ketone derivatives.

A heat stabilizer additive for reducing thermal degradation and / or surface resistivity of plasticized PVC compounds comprising: 1.0-25.0 wt % of a carbodiimide; and 75.0-99.0 wt % of a heat stabilizer comprising: (1) zinc-containing component selected from neutral or overbased zinc salts of C1-C24 linear, branched, cyclic aliphatic or aromatic organic acids, zinc diketonates, zinc alcoholates, zinc oxide, zinc hydroxide, zinc phosphite, zinc perchlorate, zinc carbonate and mixtures thereof, or metal-free nitrogen-containing compounds selected from thiourea, triethanolamine, 6-amino-1,3-dimethyl-uracil, 6-amino-1,3-di-n-propyl-uracil, 6-amino-1,3-di-n-butyl-uracil, 6-amino-1,3-diethyl-thiouracil, 6-amino-1,3-di-n-butyl-thiouracil or mixtures thereof, and optionally (2) co-stabilizers selected from hydrotalcites, zeolites, nitrogen-containing compounds, organic phosphite esters, diketones, and mixed metal compounds; and polymer compounds comprising: 30.0-89.0 wt % of a PVC homopolymer or PVC copolymer; 10.0-69.0 wt % of a primary plasticizer comprising an epoxidized natural oil or it's blends with epoxidized fatty acid monoesters; 0.01-5.0 wt % of the carbodiimide; and 0.3-5.0 wt % of the heat stabilizer.

The present invention describes the preparation of heterogeneous catalysts of mixed oxides based upon niobium and mixed oxides of zinc, manganese, nickel, cobalt and / or aluminum, originating from hydrotalcites (HTs) as precursor phase of heterogeneous catalysts, and application thereof in the chemical recycling of poly(ethylene terephthalate) (PET) for the production of metal free bis(hydroxy)ethylene (BHET) monomers and oligomers having a processing performance similar to that of the homogeneous catalysis system.

The application discloses a force-ultraviolet-X ray three-mode excited doped organic room-temperature phosphorescent material and a preparation method and application thereof. The doped organic room-temperature phosphorescent material comprises a guest compound and a host compound, and the host compound comprises halogenated benzophenone or unsubstituted benzophenone. The doped organic room-temperature phosphorescent material provided by the application can generate stable phosphorescent emission under external force stimulation, ultraviolet light and X ray excitation. Moreover, the preparation method is simple, the cost is low, the excitation mode is various, and the doped organic room-temperature phosphorescent material can emit light in the condition of no light source. The doped organic room-temperature phosphorescent material provided by the application adopts pure organic material, is not doped with metal, the structure is convenient to modify, is more green and economical, and is more in line with the development trend of green chemistry. The material can be used in the field of force-induced light emission and can be applied to the field of X ray imaging.

The invention discloses a hydrogen bond donor-terminated ionic polymer which is prepared by the following steps: by taking cyanuric chloride, a pyridine ligand or imidazole ligand and a pyridyl hydrogen bond donor as raw materials, carrying out reflux reaction in the presence of a solvent at 80-100 DEG C for 24 hours, cooling a reaction product to room temperature, carrying out solid-liquid separation, and washing and drying a solid, the hydrogen bond donor-terminated ionic polymer has the characteristics of simplicity and convenience in synthesis, high chemical stability, excellent performance, mild reaction conditions and the like, and more importantly, different catalytic active sites generated by the design can realize synergistic catalysis, so that the overall catalytic efficiency is remarkably improved, and the application prospect is broad. The material can catalyze the cycloaddition reaction of carbon dioxide (CO2) and an epoxy compound to generate cyclic carbonate under the conditions of no metal, no solvent and no cocatalyst, and shows high catalytic activity, high selectivity, remarkable catalytic effect, good recyclability and wide substrate adaptability.

The invention relates to the fields of medicine, organic chemical industry and fine chemical industry, and particularly discloses a method for synthesizing a perfluoropyridine substituted glycine derivative through photooxidation reduction catalysis. According to the method, an N-arylglycine derivative and perfluoropyridine are taken as initial raw materials, and various alpha-(perfluoro-4-pyridine) phenylglycine derivatives and N-(perfluoro-4-pyridyl) phenylglycine derivatives can be efficiently synthesized under the condition that visible light and a photosensitizer participate in catalysis. Accurate regulation and control of reaction region selectivity are realized by regulating and controlling the type and proportion of the additive alkali, and alpha-C (sp3)-H and N-H substituted polyfluoro heteroarylation products are respectively obtained. The method has the advantages of mild reaction conditions, no metal participation, no need of additional oxidant, high reaction yield and the like. In addition, the method is simple to operate, excellent in regioselectivity and good in substrate functional group compatibility, and a new thought can be provided for polyfluorinated heteroarylation modification of amino acid.