10 results about "Halogen bond" patented technology

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.

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.

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.

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.

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

This invention provides a method for constructing ordered porous organic crystalline materials based on templates. This method utilizes supramolecular interactions such as hydrogen bonding, halogen bonding, and π-π interactions to successfully construct ordered porous structures, particularly ordered macroporous structures. This method innovatively solves the problem of achieving large-sized (diameter greater than or equal to 50 nanometers) ordered permanent pores in traditional (hydrogen-bonded) organic crystalline materials, while ensuring the material's excellent stability and ordered macroporous properties. The ordered porous (especially ordered macroporous) (hydrogen-bonded) organic crystalline materials constructed by this invention, due to their unique structure and properties, are expected to show broad application prospects in catalysis, biomedicine, and other fields.

A class of metal halide-based metal-organic frameworks (MOFs) materials with multicolor tunable long-lasting emission and white light properties were synthesized by self-assembly of 15-crown ether-5 (CE) ligands and metal halide salts (CdX2), resulting in three complexes (15-5-CdCl2, 15-5-CdBr2, and 15-5-CdI2). In the solid state, the complexes (15-5-CdCl2, 15-5-CdBr2, and 15-5-CdI2) all exhibited near-standard white light emission under 340 nm ultraviolet radiation at room temperature, with CIE coordinates of (0.28, 0.32), (0.31, 0.39), and (0.30, 0.34), respectively. Simultaneously, they exhibit excitation-dependent room-temperature phosphorescence (RTP) ranging from blue / cyan to green / yellow, with 15-5-CdCl2 and 15-5-CdBr2 exhibiting multicolor tunable and visible light luminescence (LPL) with time-resolved luminescence lifetimes as high as 1-2 seconds. Single-crystal X-ray diffraction analysis and theoretical calculations indicate that the bright LPL of 15-5-CdCl2 and 15-5-CdBr2 originates from the aggregation state induced by the 15-crown ether-5 ligand and halogen bonds. The LPL obtained in this way can be widely used in lighting and display devices, optical recording devices, biological imaging, security systems, and other fields.

This invention discloses a polyimide flexible circuit board and its fabrication method, relating to the fields of micro-nano fabrication and electronic materials technology. The fabrication method includes: coating a photosensitive polyamic acid solution containing halogen bonds onto a substrate to form a film; exposing the film using a grating mask to obtain a polyamic acid thin film substrate with an M-type micro-nano structure; immersing the substrate in a palladium ion activation solution, removing it, washing, drying, and thermal imidizing to obtain a polyimide substrate; and immersing the polyimide substrate in a chemical copper plating solution for chemical plating to form micro-nano fine circuitry with an M-type embedded mechanical interlocking effect. The embedded mechanical interlocking of this invention completely encapsulates the conductive circuitry within the substrate. The substrate material itself has excellent barrier properties, effectively isolating external corrosive media such as oxygen, moisture, and salt spray, significantly slowing down the oxidation and aging process of the circuitry, extending its service life, and meeting the processing requirements of high-density flexible circuit boards.

This application discloses a germanium-bromine-based perovskite material with halohalogen bonds, its preparation method, and its applications, belonging to the field of perovskite materials. The chemical formula of the germanium-bromine-based perovskite material is (ClC6H5CH2CH2NH3)2GeBr4. This material introduces unique halohalogen bonds into its crystal structure, thereby endowing it with unique electronic structure and physical properties. Furthermore, this two-dimensional germanium-bromine-based perovskite material exhibits significant ferroelectricity, representing the first discovery of a ferroelectric two-dimensional germanium-bromine-based perovskite. This provides new insights for exploring and utilizing ferroelectric properties in next-generation electronic devices.

The application relates to a halogen and benzimidazole connected polymer membrane for H2 / CO2 separation and a preparation method. A support is soaked in an aqueous solution of an amino monomer, and the aqueous solution is fully immersed in the support. Then the support is taken out of the aqueous solution and naturally air-dried until no visible liquid exists on the surface. Further, the support is soaked in an organic phase solution containing a halogen-containing aldehyde monomer, and an interfacial polymerization reaction occurs between the amino group and the aldehyde group at the interface of the two phases to generate a halogen-containing benzimidazole connected polymer on the surface of the support. The introduction of halogen not only forms a halogen bond, but also cooperatively controls the hydrogen bond and the pi-pi interaction in the polymer, thereby realizing accurate control of the instantaneous gap of the polymer. Under the condition that the test temperature is 150 DEG C and the total pressure is 2 bar, the membrane can exhibit a H2 / CO2 selectivity as high as 475 + 108, and even if the test pressure is increased to 16 bar, the membrane still has a H2 / CO2 selectivity of 94.1.