79 results about "Halogen bond" patented technology

The invention provides a pharmaceutical composition based on a two-dimensional halogen bond organic framework XOFs and application of the pharmaceutical composition in treatment of bacterial keratitis, and the pharmaceutical composition forms a composite drug based on the two-dimensional halogen bond organic framework XOFs by loading new indocyanine green. The compound medicine has a good bacteriostatic effect and a good treatment effect on the bacterial keratitis, provides a new choice for treatment of the bacterial keratitis, can avoid drug resistance caused by long-term use of fixed medicines such as antibiotics and the like, and has a remarkable application prospect.

The invention discloses a halogen bond action auxiliary molecule self-assembly method. The method comprises the following steps: selecting an organic multi-system small molecule material containing a pyridine group at the tail end as a halogen bond receptor; selecting a derivative of 1, 4-diiodobenzene as a halogen bond donor; the halogen bond acceptor and the halogen bond donor are dissolved in a solvent, heating, stirring and ultrasonic treatment are performed, after the solution is clarified and transparent, an assembly solution is obtained, and the solvent is slowly evaporated by controlling the environment temperature to obtain the eutecticum. The invention discloses a preparation method of a eutectic film, which is characterized in that a eutectic system is prepared into the eutectic film matched with a device structure by regulating and controlling a decompression sublimation film forming process. According to the halogen bond action auxiliary molecule self-assembly method, the synthesis process of molecules can be greatly reduced, the controllable accumulation among the molecules can be greatly improved, and the halogen bond action auxiliary molecule self-assembly method can be applied to ultrahigh-density information storage.

The invention provides a preparation method of a carbon-doped carbon nitride material, which is characterized by comprising the following specific steps: (1) prepolymerization: mixing melamine and 2, 4, 6-triaminopyrimidine powder according to a certain proportion, heating to 400-450 DEG C in a protective gas atmosphere, and calcining to form prepolymer carbon-doped melem; (2) supramolecular modification: taking 0.5 g of carbon-doped melem obtained in the step (1), adding the carbon-doped melem into 25 mL of a hydrochloric acid aqueous solution with a certain concentration, carrying out ultrasonic oscillation dispersion, placing the mixture in a fuming cupboard to naturally evaporate water and excessive hydrochloric acid, and further drying and grinding the mixture to obtain a hydrogen-halogen bond connected carbon-doped heptazine supramolecular precursor; and (3) preparing carbon nitride through high-temperature calcination: calcining the hydrogen-halogen bond connected carbon-doped heptazine supermolecule precursor obtained in the step (2) at 500-600 DEG C for 2-6 hours, cooling, crushing and grinding to obtain the carbon-doped carbon nitride photocatalytic material.According to the method provided by the invention, a prepolymer is prepared firstly, has relatively high thermal stability and a heptazine skeleton structure which is the same as g-C3N4, and is used for preparing the carbon nitride photocatalytic material. The preparation method comprises the following steps: firstly, carrying out supermolecule modification through hydrochloric acid, and finally, carrying out high-temperature calcination, so that rich pore structures can be obtained, the absorption capacity of the material to sunlight and the adsorption capacity of the material to reactant molecules can be improved, the framework structure integrity of the material can also be improved, an unblocked transmission channel is provided for photon-generated carriers, and the photocatalytic efficiency is improved.

The invention discloses a synthesis method of a mono / dibromo pyridine derivative, which comprises the following steps: reacting a pyridine derivative with dimethyl butynedioate and methyl pyruvate at room temperature by using acetonitrile as a solvent to generate a dearomatized heteroaromatic compound; in an oxygen environment, copper bromide is used for brominating the dearomatized heteroaromatic compound to realize dibromination, and if potassium carbonate is additionally added in the reaction, monobromination is realized; and finally, respectively generating mono / dibromopyridine derivatives under hydrochloric acid hydrolysis. A carbon halogen bond of bromopyridine has very high activity, and various reactions such as Suzuki coupling, Sonogashira coupling, Heck reaction, amination reaction and the like can be carried out. On the basis, the polysubstituted bromopyridine can be subjected to selective reaction, and many new ideas can be provided for organic synthesis. The method disclosed by the invention is simple and safe to operate and environment-friendly, the cost is lower by using the copper bromide, and the required reaction conditions are simple.

A method of manufacturing a semiconductor device is provided. The method includes providing a wafer including a patterned structure having a top, a bottom and a sidewall. A film can be formed on the wafer by a cyclical deposition process including a cycle of contacting the wafer with a first reactant including a silicon precursor to form an intermediate layer over the patterned structure of the wafer, contacting the wafer with a second reactant to form a material layer, and generating a second plasma including an inert gas species to modify the material layer by delivering the inert gas species anisotropically towards the top of the patterned structure. The silicon precursor includes a silicon-halogen bond. The second reactant includes a precursor generated by a first plasma and selected from the group consisting of a nitrogen precursor, an oxygen precursor and a carbon precursor.

Embodiments of the present application provide a silicon-based composite negative electrode material, a preparation method thereof, a negative electrode sheet and a secondary battery. The preparation method comprises: preparing a precursor fiber by electrospinning a precursor dispersion liquid containing a first silicon source, a second silicon source, a first carbon source and a second carbon source; and obtaining the silicon-based composite negative electrode material by heat treatment of the precursor fiber; the first silicon source is silicon particles; the second silicon source carries one or more of a silicon halogen bond, a silicon oxygen bond and a silicon hydrogen bond in a molecular structure; the first carbon source is a high molecular compound; and the second carbon source is an oxygen-containing small molecule organic compound. The present application adds two silicon sources and oxygen-containing group organic compounds to the spinning precursor dispersion liquid, so as to improve the structural stability and electrochemical performance of the silicon-based negative electrode material, thereby achieving the technical effects of inhibiting volume expansion while ensuring high capacity, significantly improving the cycle stability and safety, and simplifying the preparation process and reducing the cost.

A perovskite solar cell based on a 1,4-diiodotetrafluorobenzene doped hole transport layer and a preparation method thereof, belonging to the technical field of perovskite solar cells. 2 The present invention comprises an electron transport layer, a perovskite active layer, a phenethylammonium iodide surface passivation layer, a spiro-OMeTAD hole transport layer and an Ag electrode. The present invention dopes 1,4-diiodotetrafluorobenzene into the spiro-OMeTAD hole transport layer, and utilizes the halogen bond formed between 1,4-diiodotetrafluorobenzene and the dopant TBP in spiro-OMeTAD to inhibit the corrosion of TBP on the perovskite, thereby reducing the defect density of the perovskite film. At the same time, the dedoping effect of spiro-OMeTAD induced by TBP is inhibited, the conductivity of the spiro-OMeTAD film is stabilized, and the charge can be well transmitted, thereby improving the performance of the perovskite battery device.

The present invention discloses a preparation method of a perovskite thin film transistor based on a self-assembled monolayer, and relates to the technical field of perovskite. The preparation method of the present invention comprises the following steps: (1) a small molecule solution dissolved in an organic solvent is spin-coated on a silicon wafer coated with silicon dioxide, annealed at 100-120°C for 10-15min, and a multilayer small molecule film is obtained, wherein the small molecule solution is Br-2EPO or Br-2EPT; (2) an organic solvent is spin-coated on the multilayer small molecule film. The present invention introduces two self-assembled monolayers of Br-2EPO or Br-2EPT, and the phosphate group reacts with the hydroxyl group on the gate oxide surface to achieve a smaller hydroxyl density arrangement. At the same time, the perovskite is made to achieve a better lattice arrangement through halogen bonds and Lewis acid-base interactions, thereby improving the gate interface state and effectively reducing the internal trap density of the perovskite thin film transistor.

The invention provides the photoinitiator based on the intramolecular halogen bond, and the photolysis can be delayed by adjusting the central skeleton of the photoinitiator based on the intramolecular halogen bond and the type of atoms or atomic groups forming the intramolecular halogen bond action. The invention further discloses an adhesive composition containing the photoinitiator based on the intramolecular halogen bonds and a preparation method of the adhesive composition. The adhesive composition prepared by adopting the photoinitiator based on the intramolecular halogen bonds has a window period for delaying curing, and can be used for bonding low-ultraviolet-light-transmission base materials.

This invention discloses a method for synthesizing a full-carbon quaternary carbocyclic ketone-spirocyclic pseudoindole derivative. This method uses a metal carbonyl compound as a safe carbonyl source and involves a catalytic cycle from zero-valent palladium to divalent palladium. Specifically, it involves the oxidative addition of palladium(O) via a carbon-halogen bond, the coordination and migration insertion of CO to form a carbonyl palladium species, followed by nucleophilic attack of the indole C3 ring to achieve dearomatization of the indole ring, and then reductive elimination to obtain the full-carbon quaternary carbocyclic ketone-spirocyclic pseudoindole derivative. Specifically, compound 1 and the metal carbonyl compound Co2(CO)8 are reacted under heating conditions with palladium as a catalyst, organophosphine as a ligand, and sodium salt as a base to obtain the full-carbon quaternary carbocyclic ketone-spirocyclic pseudoindole molecule. This method is a novel synthetic method for full-carbon quaternary carbocyclic ketone-spirocyclic pseudoindole derivatives, solving the problems of existing technologies such as the need for multiple reaction steps, harsh reaction conditions, narrow substrate range, and high toxicity of starting materials.

A solid catalyst component for the polymerization of olefins comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least and at least two electron donor compounds one being selected from a specific class of 1,3-diethers and the other from diester organic compounds are endowed with high polymerization activity and stereospecificity even in the absence of external donors.

The present invention relates to a catalyst for propylene polymerization, a catalyst system for propylene polymerization and preparation and use thereof. The catalyst for propylene polymerization comprises: an activated magnesium halide, a titanium compound supported on the activated magnesium halide containing at least one Ti-halogen bond, and an internal electron donor compound selected from one or more of compounds having a structure of below Formula (1), wherein R1 and R6 are each independently selected from a C1-C12 straight or branched alkyl, a C3-C15 cycloalkyl or aryl, and R′ is H, a C1-C5 straight or branched alkyl, or phenyl; R2, R3, R4, and R5 are each independently selected from H, halogen, a C1-C12 straight or branched alkyl, a C3-C8 cycloalkyl, a C6-C15 aryl, or arylalkyl. The present invention can provide a catalyst showing high polymerization reaction activity and excellent stereospecificity, by applying a novel type of internal electron donor.

The application belongs to the technical field of wastewater treatment, and provides an electrochemical anode-cathode combined system, wherein a diaphragm divides an electrolytic cell into an anode chamber and a cathode chamber, the anode chamber is provided with a counter electrode and filled with activated carbon, the cathode chamber is provided with a working electrode and a reference electrode, the working electrode comprises a conductive base and a modified electroactive biofilm arranged on the surface of the conductive base, and the modified electroactive biofilm comprises an electroactive biofilm and palladium nanoparticles loaded on the electroactive biofilm.In the application, H* generated on the surface of the palladium nanoparticles on the electroactive biofilm can attack the carbon-halogen bond in PFASs, meanwhile, the electroactive biofilm can reduce nitrate by using electrode electrons, and then the activated carbon particles passing through the anode can be adsorbed and further purified and filtered, so that the electrochemical anode-cathode combined system provided by the application can effectively remove perfluoro / polyfluoroalkyl compounds and nitrate in wastewater at the same time.

The invention is applicable to the technical field of environmental pollutant detection, and provides a dioxin SERS (Surface Enhanced Raman Scattering) sensing analysis method and device based on fluorine-functionalized MOFs (Metal Organic Frames.The method comprises the following steps: synthesizing a zirconium-based-MOF or iron-based-MOF carrier through a solvothermal method, carrying out fluorine-containing functional modification, loading a noble metal nanostructure unit in situ, and preparing a fluorine-containing functionalized MOF composite material; after a to-be-detected sample is subjected to surfactant dispersion pretreatment, 2, 3, 7, 8-TCDD is captured through the synergistic effect of F-Cl halogen bonds and pi-pi accumulation of the composite material, and ultra-trace sensing analysis is achieved in combination with SERS. The invention solves the problems of low sensitivity, complex operation and insufficient stability in the prior art, and is suitable for ultra-trace sensing analysis of 2, 3, 7, 8-TCDD in sample matrixes such as food, water, soil and the like.

The invention relates to the technical field of computational chemistry and drug screening, and discloses a fluorinated derivative screening method based on computer-aided design, which comprises the following steps: acquiring an initial binding conformation of fluorine-containing molecules and a target system, and constructing a follow-up local orthogonal coordinate system by taking the axial direction of a fluorocarbon bond as a reference; projection coordinates of the environmental particles relative to the fluorocarbon bonds are calculated and mapped as a spherical coordinate index, a preset anisotropic potential energy surface grid is called, and a potential energy value is calculated through interpolation; the method comprises the following steps: generating an anisotropic correction term, monitoring the modulus length of the energy gradient in real time, and when the modulus length of the energy gradient exceeds a sensitive threshold value, adaptively and nonlinearly reducing a sampling step length and executing high-frequency local sampling in a sensitive area. The problem of false negative activity prediction caused by insufficient sampling when a traditional equal-step algorithm is used for processing anisotropic distribution of fluorine atom electron clouds is solved, and the recognition precision and screening efficiency for weak directional interaction such as halogen bonds are improved.

A solid catalyst component for the polymerization of olefins made from or containing a magnesium halide, a titanium compound having at least a Ti-halogen bond, and at least an electron donor compound selected from 1,3-diethers.

A catalyst component for the polymerization of olefins obtained by a process comprising: (a) reacting in an inert hydrocarbon suspension medium a Mg(OR1)(OR2) compound, in which R1 and R2 are identical or different and are each an alkyl radical having 1 to 10 carbon atoms, with a tetravalent transition metal compound having at least a Metal-halogen bond, used in amounts such that the molar ratio metal / Mg is from 0.05 to 5, thereby obtaining a solid reaction product dispersed in a hydrocarbon slurry and (b) contacting the product obtained in (a) with ethylaluminum dichloride.

This invention relates to a new stationary phase carrying functional groups comprising a halogen substituted aromatic ring. Target molecules can interact with this stationary phase by halogen bonding. The stationary phase is suitable for SPE or chromatographic separations.

Halogen bonding receptors are described, as well as their use in sensing dicarboxylates.

A solid catalyst component for the polymerization of olefins comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least and at least two electron donor compounds one being selected from a specific class of 1,3-diethers and the other from diester organic compounds are endowed with high polymerization activity and stereospecificity even in the absence of external donors.

The invention discloses a simple and low-cost preparation method of a dark blue organic light emitting diode material benzo [k] fluoranthene. The method comprises the following steps: by taking aryl halide as an initial raw material, activating the aryl halide and inorganic alkali under heating under the action of a catalytic system, carrying out DA reaction under the light irradiation under the synergistic catalysis of polycyclic aromatic hydrocarbon and a metal catalyst, and oxidizing by an oxidant to obtain the benzo [k] fluoranthene. Wherein the polycyclic aromatic hydrocarbon has an autocatalytic effect under illumination, and cooperates with metal halide as a reaction catalyst to activate carbon halogen bonds on halogenated aromatic hydrocarbon, so that the halogenated aromatic hydrocarbon and the polycyclic aromatic hydrocarbon are subjected to cycloaddition Diels-Alder reaction, and then aromatization is performed to obtain the target product benzo [k] fluoranthene. All raw materials involved in the synthetic route are cheap and easy to obtain, and expensive and dangerous chemical raw materials are avoided. The reaction is carried out under illumination, the condition is mild, compared with a traditional high-temperature reaction condition, the condition is better, and the green chemistry and sustainable development concepts are met.

This invention relates to the field of alkali metal-based battery technology, and particularly to a fluorinated cyclic triphosphazene compound, a flame-retardant electrolyte, and an alkali metal-based battery. The fluorinated cyclic triphosphazene compound provided by this invention has the general structural formula shown in Formula I: Formula I; R1~R6 are each independently selected from -F or ; and one or two of R1~R6 are ; R7 is selected from substituted or unsubstituted alkylene groups, substituted or unsubstituted chain ether groups, substituted or unsubstituted cyclic ether groups; substitution means that at least one hydrogen in the group is independently replaced by a halogen, cyano, olefinic, or alkyne group. This invention applies a fluorinated cyclic triphosphazene compound containing a specific difluoromethyl terminal group to a flame-retardant electrolyte. Utilizing the unique hydrogen bonding and supramolecular halogen bonding interactions between the molecules of this compound, a stable phosphazene supramolecular network is formed inside the electrolyte, thus simultaneously ensuring battery safety, high-voltage stability, and high-temperature adaptability.

The present invention belongs to the field of catalyst technology and discloses a catalyst component for ethylene polymerization, a preparation method thereof, a catalyst, and applications thereof. The catalyst component comprises the reaction product of the following components: 1) a solid catalyst component B; 2) an alcohol compound; 3) an organic epoxy compound; and 4) a titanium compound. The solid catalyst component B comprises a titanium compound having at least one Ti-halogen bond supported in an active form on a magnesium halide. The catalyst has a good particle shape and exhibits high polymerization activity and hydrogen modulation sensitivity when used in ethylene polymerization.

The present invention relates to a phthalate free propylene-ethylene copolymer having high ethylene content characterized by low hexane extractable and xylene soluble properties, while showing excellent mechanical properties. The preparation of the copolymer is carried out in the presence of a phthalate free catalyst system comprising (a) phthalate free catalyst component obtained by contacting a magnesium halide, a titanium compound having at least a Ti-halogen bond and one or more electron donor compounds comprising urea, a carbonate ether, and a 1,3-diether; (b) an alkyl aluminum compound; and (c) an external electron donor compound.

The application provides a drug composition based on a two-dimensional halogen bond organic framework XOF and application thereof in treating bacterial keratitis, the drug composition is formed by loading new indocyanine green to form a composite drug based on the two-dimensional halogen bond organic framework XOF, the composite drug has good bacteriostatic effect and can have good treatment effect on bacterial keratitis, and provides a new choice for the treatment of bacterial keratitis, can avoid drug resistance caused by long-term use of fixed drugs such as antibiotics, and has a significant application prospect.

The invention belongs to the field of silica gel stationary phase materials for chromatographic analysis, and particularly relates to a fluorine-rich covalent triazine skeleton functionalized silica gel stationary phase as well as a preparation method and application thereof. The fluorine-rich covalent triazine skeleton functionalized silica gel stationary phase comprises a silica gel substrate, and a fluorine-rich covalent triazine skeleton is arranged on the surface of the silica gel substrate. A fluorine-rich covalent triazine skeleton is constructed on a silica gel matrix, multiple interactions such as hydrophobicity, pi-pi, C-F... pi, hydrogen bonds and halogen bonds are generated between the fluorine-rich covalent triazine skeleton and analytes, and high separation selectivity can be provided for analytes with similar structures.

A solid catalyst component for olefin polymerization comprises magnesium halide, a titanium compound having at least a Ti-halogen bond, and at least two electron donor compounds, one of which is selected from a specific class of 1,3-diethers, and the other of which is selected from diether organic compounds. The solid catalyst component exhibits high polymerization activity and stereospecificity even in the absence of an external donor.

The present invention pertains to a composite semipermeable membrane comprising: a porous support layer; and a separation function layer provided on the porous support layer. The separation function layer contains a polyamide including a halogen. The ratio of the number of carbon atoms to which a halogen is bonded with respect to the number of all carbon atoms on the surface of the separation function layer is 0.002-0.016. The composite semipermeable membrane exhibits a boron removal rate of at least 90% when an aqueous solution at 25°C having a pH of 6.5 and a sodium chloride concentration of 32000 mg / L and a boron concentration of 5 mg / L is caused to pass through the composite semipermeable membrane with an operation pressure of 5.5 MPa.

Ge-centered octahedral perovskites have heretofore not been achievable due to collapse of the perovskite structure into non-octahedral units due to a lack of B site support from the small-radius Ge atom, which breaks Goldschmidt's rules for constructing octahedral perovskites. To overcome this shortcoming, a strategy was developed to form a strong cage with the A sites in which the octahedron is forced to remain intact. Strong intermolecular interaction between the organic A site cations were used to stabilize the symmetric Ge octahedral perovskite beyond the Goldschmidt's rules. The molecules used based on Y-PMA (Y: F, Cl, Br, I) that facilitated strong halogen bonding to form the cage around the octahedral. Octahedral Ge perovskites exhibit a direct bandgap in contrast to the indirect bandgap of non-octahedral Ge perovskites are demonstrated. In addition, the octahedral Ge perovskite exhibited a dramatic increase in the carrier mobility. A photodetector made with the stabilized octahedral perovskite material exhibited a vastly better responsivity than non-octahedral Ge perovskites.

The invention relates to a method for treating halogenated organic pollutants in halogenated organic contaminated soil through combination of chemical leaching and electron beam irradiation, and belongs to the technical field of soil remediation and treatment. According to the method, leacheate and halogenated organic contaminated soil are mixed, oscillated and leached, so that halogenated organic pollutants in the halogenated organic contaminated soil enter the leacheate, and the leacheate contains an organic solvent and / or a nonionic surfactant; after leaching, centrifugal treatment is conducted, supernate is subjected to electron beam irradiation, free radicals generated in the irradiation process destroy carbon halogen bonds, and therefore dehalogenation and mineralization of halogenated organic pollution are achieved. Electron beam irradiation can be carried out at normal temperature and normal pressure, chemical reagents are not needed, and the risk of reagent residues is avoided. The leacheate can be directly recycled after being irradiated, so that the treatment cost is reduced. Compared with other repairing technologies, the combined technology is short in repairing period and high in adaptability.