280 results about "Coordination complex" patented technology

The invention belongs to the technical field of membrane separation, and particularly relates to a metal-organic coordination complex induced assembled ZIF-8 composite membrane as well as a preparation method and application thereof. The ZIF-8 composite film is formed by tightly adhering ZIF-8 nano-particles of a core-shell structure, the shell of the ZIF-8 nano-particles of the core-shell structure is a metal-organic coordination complex, and the core is a ZIF-8 nano-particle; wherein the average particle size of each ZIF-8 nanoparticle with the core-shell composite structure is about 20 to 100 nm. The preparation of the composite membrane is simple and controllable, and the prepared compact and defect-free self-supporting ZIF-8 composite membrane has excellent H2 / CO2 separation performance. Under the conditions of room temperature and air inlet pressure of 1 atm, the H2 permeation rate of the ZIF-8 composite membrane reaches 1984.8 GPU, and the H2 / CO2 separation selectivity is 176.0. The composite membrane has a good application prospect in the fields of carbon capture before combustion and the like.

Disclosed herein is a compound that is (R)-(2-(3-((((2-ethylbutanoyl)oxy)methoxy)carbonyl)-2-hydroxyphenyl)-1-propionamidoethyl)boronic acid citrate coordination complex, or a pharmaceutically acceptable salt or solvate thereof. Also disclosed herein are methods of treating a bacterial with a compound that is (R)-(2-(3-((((2-ethylbutanoyl)oxy)methoxy)carbonyl)-2-hydroxyphenyl)-1-propionamidoethyl)boronic acid citrate coordination complex, or a pharmaceutically acceptable salt or solvate thereof in combination with ceftibuten.

The invention discloses a slow automatic gas generation foam gel base fluid and a preparation method thereof, and relates to the technical field of oil exploitation and profile control and water plugging. The slow-speed gas self-generating foam gel base solution comprises a gas generating agent, a thickening agent, a pH stabilizer, a cross-linking agent, a foaming agent and water, the gas generating agent comprises an amine substance and a nitrous acid oxidizing agent, the pH stabilizer is a buffer solution, the cross-linking agent is a cross-linking agent, and the foaming agent is a foaming agent. The cross-linking agent is a coordination compound formed by one or more of titanium ions, chromium ions, aluminum ions, zirconium ions or boron ions and organic acid. The slow-speed gas self-generating foam gel base fluid provided by the invention realizes controllability and slow speed of cross-linking reaction and gas generation reaction, and can improve the stability of the base fluid at normal temperature, prolong the cross-linking time and the gas generation period and improve the gas generation efficiency during application. The safety of the system can be enhanced, the injection pressure of the base fluid can be reduced, the plugging strength can be improved, deep profile control and plugging can be realized, and the crude oil recovery rate can be improved.

Molybdenum(0) coordination complexes comprising ligands which each coordinate to the metal center by nitrogen or phosphorous are described. Methods for depositing molybdenum-containing films on a substrate are described. The substrate is exposed to a molybdenum precursor and a reactant to form the molybdenum-containing film (e.g., elemental molybdenum, molybdenum oxide, molybdenum carbide, molybdenum silicide, molybdenum nitride). The exposures can be sequential or simultaneous.

The invention relates to the technical field of catalysts, and provides a catalyst and a preparation method thereof, and an application of the catalyst in carbon dioxide-based degradable plastics, the catalyst is a supported catalyst, and comprises a carrier and an active component; the carrier comprises ternary hydrotalcite, and the active component comprises double metal cyanide and a rare earth yttrium complex; the raw material of the double metal cyanide comprises a cyano coordination compound; the cyano coordination compound comprises potassium hexacyanomanganate and / or potassium hexacyanocobaltate. According to the technical scheme, the problems of low yield and more byproducts when the catalyst is used for catalyzing and preparing the carbon dioxide-based degradable plastic in the related technology are solved.

The invention relates to a salt-resistant biomass interface evaporation material as well as a preparation method and application thereof, and relates to the technical field of interface evaporation materials. The preparation method comprises the following steps: mixing sunflower fiber dispersion liquid, polyvinyl alcohol and carbon-containing molybdenum disulfide, then adding glutaraldehyde, then carrying out liquid nitrogen freezing and freeze drying, sequentially soaking with a tannic acid solution, a calcium chloride solution and a ferric chloride solution, and then carrying out freeze drying. Natural sunflower fibers are used as a main framework, cotton is used as a supporting material, carbon-containing MoS2 is prepared and crosslinked with polyvinyl alcohol, a hydrophilic functional layer is constructed on the surface of the material through tannic acid, and the tannic acid is coordinated and complexed with Ca and Fe < + >, so that a more stable hydrophilic complexed coating is formed on the surface of the material; the surface wettability and the water conveying capacity of the material are further improved, meanwhile, salt crystal deposition and precipitation in the seawater evaporation process are effectively inhibited, and the oxidation resistance and the seawater corrosion resistance of the material are improved.

A method for producing calcium phosphate crystals according to the present invention comprises a step (S11) for preparing a weakly basic phosphoric acid solution containing a complex comprising a rare earth element ion and a coordination compound having a ligand coordinated to the rare earth element ion and a step (S12) for adding a calcium-containing compound to the weakly basic phosphoric acid solution and hydrolyzing. Some of the plurality of calcium ions contained in the structure of the calcium phosphate crystals are substituted by the rare earth element ion.

The invention belongs to the field of photocatalyst and precious metal recovery, and particularly relates to a method for recovering precious metal through photocatalysis. Comprising the following steps: under an illumination condition, in an oxygen-containing environment, in a first solvent added with polyoxometallate and a noble metal-containing material, catalyzing the dissolution of noble metal in the noble metal-containing material by the polyoxometallate to generate a noble metal organic or inorganic coordination compound, so as to obtain a first reaction solution; and polyoxometallate obtained after liquid removal of the first reaction liquid and a precious metal organic or inorganic coordination compound are placed in water containing an electron sacrificial agent, and reduced and recycled precious metal is obtained under the illumination condition. According to the method, polyoxometallate is adopted as the catalyst, the method can be carried out under the illumination condition, no toxic solvent is needed, heavy metal pollution and secondary ecological risks are avoided from the source, the precious metal recovery rate is high, economical efficiency and environmental friendliness are high, and the application prospect is wide.

The invention discloses a covalent organic framework antibacterial material with NO light-controlled release as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. The covalent organic framework antibacterial material is a porous polymer taking a cyclodextrin inclusion compound and a porphyrin metal coordination compound as structural units; a plurality of porphyrin metal coordination compounds surround the cyclodextrin inclusion compound in each structural unit, and the porphyrin metal coordination compounds are not on the same plane; the cyclodextrin inclusion compound is obtained by inclusion of BNN6 with beta-cyclodextrin; the porphyrin metal coordination compound is a coordination compound of porphyrin and copper. The preparation method comprises the following steps: firstly preparing a cyclodextrin porphyrin porous polymer, then matching the cyclodextrin porphyrin porous polymer with copper and entrapping BNN6 to obtain a covalent organic framework antibacterial material, utilizing NO release and combining simulated photo-thermal, photodynamic, peroxidase and glutathione peroxidase to achieve synergistic antibacterial effect, and remarkably accelerating the recovery of bacterial infected wounds.

The invention discloses a Cu (I)-Cys nano material of a bionic plant ethylene receptor protein, an MXene / Cu (I)-Cys nano composite material obtained by compounding the Cu (I)-Cys nano material with MXene, and preparation and application of the MXene / Cu (I)-Cys nano composite material for a wearable sensor, and belongs to the technical field of ethylene sensors. The Cu (I)-Cys nano material provided by the invention is a copper ion-cysteine dimeric complex and is obtained by dimerization of L-cysteine through sulfydryl and chelating of copper ions, and a coordination compound (Cu (I)-Cys) of Cu < + > and L-cysteine can be obtained by regulating the molar ratio of the copper ions to cysteine to be 0.8: 4. The material provided by the invention simulates plant ethylene receptor protein, is low in cost, simple to prepare and high in biocompatibility, can be applied to ethylene room temperature detection, and realizes that the lowest detection concentration reaches 50ppb and the lowest detection limit is 0.043 ppm.

The invention relates to the technical field of sewage treatment, and discloses a treatment agent for sewage generated after cracking of waste tires and a preparation method of the treatment agent. The sewage treatment agent obtained after cracking of the waste tires is obtained by mixing polyferric silicate sulfate, polyaluminum chloride, thioureido sulfobetaine modified chitosan and imidazoline quaternary ammonium salt modified graphene oxide. Sulfur and amino in the thiourea group can form a stable multidentate coordination complex with heavy metal ions, so that efficient adsorption is realized; a thiourea group and sulphobetaine structure is introduced to a chitosan molecular chain, so that the adsorption sites of chitosan are increased, and the sewage treatment effect is improved; nitrogen atoms on an imidazoline ring can form hydrogen bonds in the flocculation process, so that the interaction between the sewage treatment agent and colloidal particles is enhanced, and the aggregation of the colloidal particles is promoted; by introducing imidazoline quaternary ammonium salt into graphene oxide, agglomeration of graphene oxide lamellas is reduced, and the sewage treatment effect is further improved.

A compound is disclosed that has a metal coordination complex structure having at least two ligands coordinated to the metal; wherein the compound has a first substituent R1 at one of the ligands' periphery; wherein a first distance is defined as the distance between the metal and one of the atoms in R1 where that atom is the farthest away from the metal among the atoms in R1; wherein the first distance is also longer than any other atom-to-metal distance between the metal and any other atoms in the compound; and wherein when a sphere having a radius r is defined whose center is at the metal and the radius r is the smallest radius that will allow the sphere to enclose all atoms in the compound that are not part of R1, the first distance is longer than the radius r by at least 2.9 A.

The invention discloses a synthesis method and application of nitrogen-doped carbon-coated Co porous spheres, cobalt nitrate hexahydrate and 4-picolinic acid are dissolved in a mixed solution, the mixed solution comprises dimethylformamide and absolute ethyl alcohol, then the mixed solution is transferred into a reaction kettle for heating reaction, and after the reaction is finished, centrifugal drying is performed to obtain a Co coordination compound precursor; and calcining the precursor in an argon hydrogen atmosphere, and selecting and setting a proper heating rate, a proper calcining temperature and a proper calcining time to obtain the nitrogen-doped carbon-coated Co porous ball. The obtained nitrogen-doped carbon-coated Co porous ball is used as the air cathode of the zinc-air battery, so that high power density and excellent charge-discharge cycle stability are realized.

Disclosed herein is a compound that is (R)-(2-(3-((((2-ethylbutanoyl)oxy)methoxy)carbonyl)-2-hydroxyphenyl)-1-propionamidoethyl)boronic acid citrate coordination complex, or a pharmaceutically acceptable salt or solvate thereof. Also disclosed herein are methods of treating a bacterial with a compound that is (R)-(2-(3-((((2-ethylbutanoyl)oxy)methoxy)carbonyl)-2-hydroxyphenyl)-1-propionamidoethyl)boronic acid citrate coordination complex, or a pharmaceutically acceptable salt or solvate thereof in combination with ceftibuten.

The present invention relates to a process for the ring-opening polymerization of glycolide using a novel initiator. A polymerization system is composed of glycolide, a catalyst, and an initiator. The initiator contains hydrophilic and hydrophobic groups and heteroatoms such as sulfur and nitrogen. While metal ions in traditional catalysts catalyze polymerization, they will complex with the oxygen atoms of ester bonds to catalyze the cleavage of the ester bonds of polyglycolide (PGA), resulting in a decrease in the molecular weight of PGA and an increase in the chromaticity of the product. The heteroatoms contained in the novel initiator of the present invention have a strong complexing ability with metals, can form a relatively stable coordination complex with the catalyst, prevent the cleavage of PGA, and reduce the chromaticity of the product. In addition, the addition of this novel initiator introduces some flexible chain segments, lowers the freezing point of PGA, and enables the polymerization temperature to be reduced. Compared with the prior art, the present invention has the advantages of high product molecular weight, relatively uniform molecular weight distribution, large operation flexibility in the polymerization reaction time, and wide temperature control window, and is suitable for industrial production.

The invention provides an antibacterial polypropylene master batch and a preparation method thereof. The preparation method comprises the following steps: providing a metal organic framework structure; forming a polyquaternary ammonium salt chain in a pore channel of the metal organic framework structure to obtain an antibacterial inner core; the antibacterial core is dispersed in a buffer solution containing metal ions and polycarboxylic acid ligands, so that the metal ions and the polycarboxylic acid ligands form a dynamic coordination complex network on the surface of the antibacterial core, and part of uncoordinated carboxyl functional groups are reserved; mixing the antibacterial inner core coated with the dynamic coordination layer on the surface with functionalized polyolefin and silicon dioxide with epoxidized surface to form a premixed system; and granulating the premixed system, a polypropylene matrix and an antioxidant under a melt blending condition to obtain the antibacterial polypropylene master batch. The antibacterial polypropylene master batch provided by the invention maintains the original mechanical properties and processing rheological properties of a polypropylene matrix while realizing efficient and long-acting antibacterial properties, and has no adverse effect on the basic properties of the polypropylene matrix.

A novel method for artificial photosynthesis utilizing a chemical system that operates by harnessing visible light and directly capturing carbon dioxide and water from the atmosphere. The system is based on self-organizing complexes comprising visible-light-sensitive chromophores, such as 2-phenyl indole and 2-phenyl benzoxazole, along with titanium tetrachloride, which autonomously perform continuous, complex chemical operations to produce long-chain (C2 to C17) oxygenated organic materials. The process employs earth-abundant metal coordination compounds, including titanium (Ti), zirconium (Zr), hafnium (Hf), and vanadium (V), in the solid state. These compounds form carbonated metal derivatives upon hydrolysis, which are subsequently reduced through proton transfer from water. The system initially generates C1 materials that oligomerize via a novel self-catalyzed mechanism intrinsic to the system's operation. Monitoring and characterization of the chemical transformations have been conducted using high-resolution MALDI-TOF (matrix-assisted laser desorption ionization-time of flight) mass spectrometry, supported by infrared (IR) spectroscopy and nuclear magnetic resonance (NMR) analysis. This innovation represents a sustainable and scalable approach for converting atmospheric CO2 into valuable organic materials.

This composition for forming a coating film for foreign substance removal can form a coating film that can be removed using a remover liquid. The composition contains a film structural component and a solvent, and the film structural component contains a coordination compound.

The invention relates to the technical field of olefin polymerization, and discloses a catalyst for olefin polymerization, a preparation method of the catalyst and an olefin polymerization method. The catalyst is a coordination compound and has a structure shown in a formula (1), and L is selected from O, S or-NH-; m is selected from Ti, Zr, Hf, Cr, Ni or Fe; x is selected from a substituted or unsubstituted C1-C20 oxygen-containing group, F, Cl, Br or I; n is an integer of 2-6; and m is an integer of 1-4. The catalyst can efficiently catalyze ethylene monomer homopolymerization to selectively prepare linear alpha-olefin, is especially suitable for selective preparation of 1-hexene and / or 1-octene, has high catalytic activity and good catalytic stability, and can co-produce 1-hexene and 1-octene with high selectivity. # imgabs0 #

The application discloses a kind of light-assisted anticorrosion coating materials and preparation method based on metal coordination structure, the light-assisted anticorrosion coating material is on the basis of traditional anticorrosion metal zinc layer continue to be coordinated with the metal coordination polymer Co (bpy) (dhbq) (bq) with photoelectric conversion capability, and form coordination complex Co (bpy) (dhbq) (bq) @Zn.Because metal coordination polymer Co (bpy) (dhbq) (bq) itself can additionally generate photo-generated electron and photo-generated current after being illuminated, provide redundant charge for Zn layer, make it be in lower potential, strengthen the function of cathodic protection.Corrosion can be inhibited through this mechanism, prolong the service life of Zn layer, provide efficient, green anticorrosion protection for the steel material that needs to be protected.In addition, metal coordination light-assisted anticorrosion technology can also inhibit marine bioattachment by slowly releasing metal ions Co, prevent biofilm formation, reduce microbial growth, prolong the service life of protected material in marine environment, also applicable to underwater bioinduced corrosion and the protection of fouling metal structure.

The application discloses a platinum complex with controllable activity and a preparation method and application thereof, which is formed by coordination of vinyl siloxane, modified ligand and chloroplatinic acid; the modified ligand is prepared by reaction of maleic anhydride, allylamine and hydroxymethyl dimethyl phosphite. The application introduces amide groups and phosphite groups into the molecular chain of maleic anhydride, uses the groups as coordination compounds to coordinate with vinyl siloxane and platinum, and can improve the normal-temperature storage stability of the platinum catalyst while still keeping high catalytic activity of the platinum catalyst on the hydrosilylation reaction; when the platinum complex is used for catalyzing preparation of addition-type liquid silicone rubber, no inhibitor needs to be added, and the silicone rubber has good mechanical properties.

The invention discloses a photo-assisted anti-corrosion coating material based on a metal coordination structure and a preparation method, the photo-assisted anti-corrosion coating material is continuously coordinated with a metal coordination polymer Co (bpy) (dhbq) (bq) with photoelectric conversion capability on the basis of a traditional anti-corrosion metal zinc layer to form a coordination compound Co (bpy) (dhbq) (bq) (at) Zn. Due to the fact that the metal coordination polymer Co (bpy) (dhbq) (bq) can additionally generate photo-generated electrons and photo-generated currents after being illuminated, redundant charges are provided for the Zn layer, the Zn layer is made to be in a low potential, and the cathode protection function is enhanced. Through the mechanism, corrosion can be inhibited, the service life of the Zn layer can be prolonged, and efficient and green anti-corrosion protection is provided for steel and iron materials needing to be protected. In addition, by slowly releasing metal ions Co, the metal coordination light-assisted anticorrosion technology can inhibit marine organism adhesion, prevent biofilm formation, reduce microbial growth and prolong the service life of a protected material in a marine environment, and is also suitable for underwater organism induced corrosion and protection of stained metal structures.

The present invention discloses a preparation method of a single-atom coordinated composite photoelectrocatalyst, which utilizes non-metal defects (sulfur / oxygen vacancies) and an amorphous substrate to synergistically anchor variable-valence single atoms and in-situ growth strategies and methods such as solvothermal method to achieve the coordination and composite of Bi2S3-S V and Co-N4-C. Through the liquid-phase sulfidation method, thioacetamide is used as a sulfur source to in-situ generate Bi2S3-S V , and by regulating the sulfur source ratio and reducing the concentration of thioacetamide, sulfur defects are directly introduced during the sulfidation process. Then, combined with the annealing process, Co single atoms are promoted to migrate to the Bi2S3-S V interface to form Co-S y coordination, while retaining the Co-N4 coordination within the N-C framework, constructing a unique Bi2S3-S V / Co-N4-C composite photoelectrocatalyst with the synergistic effect of sulfur vacancies and Co single-atom double coordination to achieve efficient photoelectrocatalytic hydrogen production and coupling reactions such as formaldehyde oxidation.

A photoluminescent nanocomposite material according to one aspect of the present invention includes a carrier matrix, a plurality of photoluminescence nanostructures distributed in the carrier matrix, and an additive including one or more coordination complexes having thiol and lipophilic properties.

The present invention primarily relates to a coordination complex obtained or obtainable by a process as defined herein and to a process for producing a coordination complex as defined herein. Moreover, the present invention relates to a coordination complex as defined herein. The present invention further relates to the use of a coordination complex obtained or obtainable according to the process as defined herein or of a coordination complex as defined herein as a catalyst. Finally, the present invention relates to a process, preferably a hydrogen transfer reaction, more preferably for the isomerization of a double bond in a substrate, as defined herein.

The invention belongs to the field of biological catalytic materials, and particularly relates to a palladium monatomic-based biological catalyst, a biological catalytic compound thereof, a preparation method and application of the biological catalyst. The invention designs a coordination complex (Pd-Tpb) based on a palladium single atom from the beginning and finds that the coordination complex can be used as a biocatalyst with radiation-enhanced ROS (reactive oxygen species) generation activity and tumor killing performance for the first time. On the basis, Pd-Tpb is used for modifying lactobacillus probiotics, the obtained biocatalytic compound is used for biocatalysis and radiosensitization treatment, and it is found that the biocatalytic compound has the remarkably improved radiosensitization effect and has the effect of eradicating primary and metastatic tumors.

The invention discloses a polyving akohol-based composite film with multiple functions and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite film is prepared by taking polyvinyl alcohol (PVA) as a matrix and introducing an iron-tannic acid coordination complex (Fe-TA) and nano zinc oxide (ZnO NPs). The preparation method comprises the following steps: preparing a PVA solution; the preparation method comprises the following steps: coordinating ferric chloride hexahydrate with tannic acid to form a Fe-TA complex solution, and compounding the Fe-TA complex solution with a PVA solution; and adding the nano-zinc oxide dispersion liquid into the composite liquid, and carrying out defoaming, curtain coating and drying to form the film. Through the synergistic effect of Fe-TA and ZnO NPs, the problems that a pure PVA film is high in hydrophilicity and single in function are effectively solved. The obtained composite film has excellent mechanical strength, high oxygen and water vapor barrier property, efficient near-infrared light thermal response capability and long-acting antioxidant activity, and has wide application prospects in the fields of food active packaging, intelligent packaging and the like. The method is simple in process, environment-friendly and easy for large-scale production.

The present invention provides a composition suitable for use in switchable mirror devices, said composition comprising, dissolved in a solvent, a reducing compound E, a metal cation Mn+, and an organic ligand L able to form a coordination complex with Mn+, wherein E does not spontaneously reduce oxidized metal present in the composition, and wherein L comprises the following moiety I: Wherein X and X' are independently selected from O, and.

The application belongs to the field of biological catalytic materials, and particularly relates to a biological catalyst based on a palladium single atom, a biological catalytic complex thereof, and a preparation method and application thereof. A coordination complex (Pd-Tpb) based on a palladium single atom is designed from scratch, and it is found for the first time that the coordination complex can be used as a biological catalyst with ROS generation activity and tumor killing performance with radioenhancement. On this basis, the Pd-Tpb is used to modify lactobacillus probiotics, and the obtained biological catalytic complex is used for biological catalysis and radiosensitization treatment, and it is found that the biological catalytic complex has a significantly improved radiosensitization effect and has the effect of eradicating primary and metastatic tumors.

Coordination complexes are provided comprising at least one metal atom; and organic ligands comprising one or more coordination sites associating with the at least one metal atom. Related methods and articles having a metal carbide coating are also provided, the metal carbide coating being derived from one or more coordination complexes.