23 results about "Mixed ligand" patented technology

The invention relates to the technical field of blood purification materials, in particular to a zirconium-titanium bimetal MOF hollow microsphere adsorbent and a preparation method and application thereof. The adsorbent is based on a Zr / Ti bimetallic node and a phosphonic acid-carboxylic acid mixed ligand, a composite MOF hollow microsphere structure with high stability and high specific surface area is constructed through a solvothermal and polymerization synergistic reaction in a water-in-oil suspension system, a phosphonic acid group and Zr are strongly coordinated to improve the stability of a framework, and the composite MOF hollow microsphere structure has a high specific surface area. The carboxylic acid group keeps the hydrophilicity of the pore channel; meanwhile, a cross-linked network of acrylamide and N, N '-methylene bisacrylamide penetrates through crystal gaps in the balling process, so that the material has excellent mechanical strength and fluid stability; and a sulphobetaine amphoteric polymer brush layer is constructed on the surface of the MOF through endogenous initiation point modification and surface in-situ controllable free radical polymerization technologies, so that protein adsorption and platelet adhesion are effectively inhibited, the blood compatibility is remarkably improved, and meanwhile, the channel accessibility is maintained to promote rapid diffusion and adsorption of bilirubin.

The invention provides a patterning composition, a compound, a patterning method, an electronic device and application. The patterning composition includes a compound represented by the following formula: (RaM) b (L1) x (L2) y (L3) z. The patterning composition comprises the metal organic compound coordinated by the specific mixed ligand, so that in the patterning process, the structure can obviously improve the hydrolytic stability of the patterning composition during the patterning process, and the exposure dose is reduced.

The invention discloses a hierarchical pore UiO-66 supported crown ether composite material, a preparation method thereof and application of the hierarchical pore UiO-66 supported crown ether composite material in adsorption and extraction of 6Li < + > from complex systems such as salt lake brine. The preparation method comprises the following steps: preparing terephthalic acid, 2-aminoterephthalic acid and a zirconium source through a solvothermal method to obtain a mixed ligand UiO-66, and then pyrolyzing the mixed ligand UiO-66 in an air atmosphere to obtain the hierarchical pore UiO-66; the hierarchical pore UiO-66 and a crown ether solution are mixed and stirred to react for a period of time, then solid-liquid separation is carried out, solids are collected, and the hierarchical pore UiO-66 loaded crown ether composite material is obtained after cleaning and drying. The hierarchical pore UiO-66 loaded crown ether composite material has the advantages of high specific surface area, high dispersion of crown ether adsorption sites, high crown ether loading capacity, high selectivity of 6Li < + > metal ions and the like, and can realize one-step enrichment of 6Li < + > metal ions in complex systems such as salt lake brine.

The invention discloses a mixed ligand modified cesium lead halide perovskite nanocrystal and a preparation method thereof, and the preparation method comprises the following steps: (1) adding CsBr and PbBr2 in an equal molar ratio into a P-AMDL polymer solution to obtain a CsPbBr3 precursor solution; (2) injecting the precursor solution into a toluene solvent, and then settling and purifying by using an n-hexane solvent to obtain a P-AMDL modified CsPbBr3 solution; (3) introducing an oleic acid oleylamine ligand to obtain CsPbBr3 modified by a mixed ligand; and (4) optimizing an ion exchange method by combining a mixed ligand strategy to obtain the mixed ligand modified CsPbBrxI3-x. According to the invention, the problem of wide particle size distribution of nanocrystals synthesized by an LARP method at room temperature is solved, and the all-inorganic cesium-lead halide perovskite nanocrystals with fewer defects, more regular morphology and better ultraviolet stability are successfully prepared. The'micromolecule + polymer 'mixed ligand strategy gives consideration to the regulation and control precision of the micromolecule ligand and the stability of the polymer ligand, and is an effective means for optimizing the morphology and performance of the perovskite nanocrystal.

The invention belongs to the technical field of preparation of catalytic materials, and provides a high-density defective polyacid-based metal organic framework catalyst for hydroboration, a preparation method and application. According to the catalyst, a metal organic framework with defects is constructed by adopting a mixed ligand strategy, a polyacid cluster is introduced in situ on the basis of the metal organic framework, and through weak interaction between a cluster object and a subject framework, regulation and control of an oxidation state of a metal node and regulation and control of a supporting effect of an expanded pore space are realized at the same time; therefore, the problem of unstable structure caused by high defect content is overcome, the polyacid-based metal organic framework catalyst with high-density defects is successfully constructed, the catalyst solves the problems that the existing hydroboration reaction is high in temperature, the catalyst is difficult to recycle and the like, efficient conversion of the alkyne hydroboration reaction can be realized, and the yield of the alkyne hydroboration reaction is increased. Moreover, the structure is still stable after repeated cyclic utilization and use, and can be expanded to various alkyne substrates.

The present disclosure includes the preparation of mixed-ligand compounds, such as tin(II) cyclopentadienylide complexes. The compounds of the present disclosure can be used as atomic layer deposition (ALD) precursors for extreme ultraviolet (EUV) lithography. The compounds of the present disclosure can also be used as plasma chemical vapor deposition (CVD) precursors for EUV lithography.

Provided herein are mixed ligand metal organic framework (ML-MOF) materials having rectangular grids characterized by the general formula MaMbF6-n(O / H2O)n(Ligand′)x(Ligand″)y(solvent)z, which are effective for capture of carbon dioxide from a fluid composition.

The invention discloses a hydrated eutectic electrolyte and a preparation method and application thereof, and belongs to the technical field of batteries. The invention provides a mixed ligand hydration eutectic electrolyte strategy based on thermodynamic-dynamic balance. According to the strategy, through functional synergy of acetamide (Ace) and 1, 3-dioxolane (Dol), integrated regulation and control of an electrolyte liquid phase microenvironment and interface chemistry are achieved, so that side reactions are remarkably inhibited, and the electrochemical performance is comprehensively improved.

The invention relates to the technical field of nanometer material synthesis and catalysis, in particular to a gold nanocluster and a preparation method thereof, a catalyst and a preparation method and application of the catalyst. The molecular formula of the gold nanocluster is Au40 (TBBT) 24 (TPMP); wherein the TBBT is 4-tert-butyl thiophenol, and the TPMP is tri (m-phenyl) phosphine. According to the present invention, the gold nano-particles have the accurate number of atoms and the determined molecular structure, the synergistic effect of the mixed ligands (mercaptan and phosphine) on the surface of the gold atomic nucleus further regulates the electronic structure and the surface property of the cluster, and the adsorption and activation ability of the substrate molecule is optimized so as to improve the catalytic efficiency and the stability; especially for reduction reactions such as reduction of 4-nitrophenol, the cluster can realize efficient catalytic conversion under mild conditions.

The invention belongs to the technical field of catalyst preparation, and relates to a method for rapidly and macroscopically preparing an iron-loaded porous molecular organic framework catalyst, which comprises the following steps: by taking 2, 2 '-bipyridine-5, 5'-dicarboxylic acid Bpydc and 4, 4 '-stilbene dicarboxylic acid SBDC as mixed ligands, Al (NO3) 3.9 H2O as a metal source and N, N-dimethylformamide DMF as a solvent, completing a reaction within 1 min by adopting an ultra-rapid solvothermal method, thereby obtaining the iron-loaded porous molecular organic framework catalyst. A gram-level MOF precursor MOF-1 is obtained; dispersing the obtained MOF carrier in an acetonitrile solution to form an MOF dispersion liquid, then adding FeCl3. 6H2O, and anchoring Fe species in pores or surfaces of MOF-1 through an impregnation method; and carrying out vacuum drying treatment on the loaded material for 12 hours to obtain the catalyst. According to the method, the time limitation of a traditional solvothermal method is broken through, the MOF synthesis time is shortened from day to minute, rapid preparation is realized, and the preparation efficiency is high. According to the method disclosed by the invention, complex high-voltage equipment is not needed, the process is simple, amplification is easy, the gram-level high-quality MOF carrier can be prepared at one time, macro preparation is realized, and the mass production capacity is outstanding.

The invention discloses a defect-state Zr-La bimetal MOF adsorbent as well as a preparation method and application thereof, and relates to the technical field of water treatment and adsorption materials. Comprising the following steps: mixing zirconium salt, lanthanum salt, a solvent and an organic ligand, fully stirring and dissolving, carrying out hydrothermal reaction, centrifugally washing, drying, and collecting to obtain the defect-state Zr-La bimetal MOF adsorption material, the organic ligand is selected from 1, 3, 5-benzenetricarboxylic acid or a mixture obtained by replacing 1, 3, 5-benzenetricarboxylic acid with a hybrid organic ligand in a set proportion, and the hybrid organic ligand is selected from any one of terephthalic acid, isophthalic acid, phthalic acid, p-hydroxybenzoic acid, pyridine-3, 5-dicarboxylic acid and 2-aminoterephthalic acid. According to the defect-state Zr-La bimetal MOF adsorbent provided by the invention, accurate control on a material defect structure is realized through methods such as ligand mixing, reaction condition regulation and control and post-synthesis modification, controllable defects are introduced into a frame structure, the porosity is improved, and additional active sites are generated, so that the fluorine adsorption performance is remarkably improved.

The present invention provides a method for one-step synthesis of adiponitrile. In the method, starting materials butadiene and hydrogen cyanide directly react under the action of a rare earth metal-mixed ligand catalyst and an auxiliary agent to produce adiponitrile, wherein the rare earth metal-mixed ligand catalyst comprises a rare earth metal, a monodentate phosphite ligand, and a multidentate phosphite ligand. According to the present invention, by using the rare earth metal as a catalyst, together with the monodentate phosphite ligand and the multidentate phosphite ligand, the rare earth metal-mixed ligand catalyst with high catalytic performance and high stability is formed, which, in combination with the auxiliary agent, efficiently catalyzes the simultaneous reaction of butadiene with two molecules of hydrogen cyanide to directly obtain adiponitrile. The method greatly simplifies the process flow of producing adiponitrile by using butadiene and hydrogen cyanide as starting materials, and features a high starting material conversion rate, high adiponitrile selectivity, and low operating costs, thus being suitable for large-scale industrial production.

The invention discloses a method for realizing controllable synthesis of polyhedral cuprous oxide based on sound wave temperature control, which comprises the following steps: (1) preparation of a mixed solvent, (2) preparation of a temperature control environment, (3) preparation of a mixed ligand complex precursor, (4) sound wave reaction, and (5) washing and drying of a material. A mixed ligand complex system formed by common coordination of acetate, ethylene glycol molecules and water molecules slowly releases Cu < 2 + >, and the anisotropic growth rate of the crystal can be controlled to induce huge development of the morphology of pure-phase cuprous oxide through differential extreme temperature differences between local high temperature and different temperature environments by virtue of an ultrasonic cavitation effect. The method has the characteristics of low raw material cost, simple equipment, environmental friendliness and the like, the synthesis process is simple, convenient, feasible and highly controllable, Cu < 2 + > is slowly released skillfully based on a mixed ligand complex system, the difference extreme temperature difference between the local high temperature and the external environment of the ultrasonic cavitation effect is utilized, and the method is suitable for industrial production. The controllable development of the pure-phase cuprous oxide polyhedral morphology is successfully realized, and the diversity of the material in the aspects of morphology design and structure regulation and control is expanded. The material has a wide application prospect in the aspect of functional material development in the field of clean energy.

The application provides a one-step synthesis method of adiponitrile, in which raw materials of butadiene and hydrocyanic acid are directly reacted to generate adiponitrile under the action of a rare earth metal mixed ligand catalyst and an auxiliary agent; the rare earth metal mixed ligand catalyst comprises a rare earth metal, a monodentate phosphite ligand and a polydentate phosphite ligand. The application forms a rare earth metal mixed ligand catalyst with high catalytic performance and high stability by taking a rare earth metal as a catalyst, a monodentate phosphite ligand and a polydentate phosphite ligand, and combines with an auxiliary agent to efficiently catalyze butadiene and two molecules of hydrocyanic acid to directly obtain adiponitrile. The method greatly simplifies a process flow of producing adiponitrile by taking butadiene and hydrocyanic acid as raw materials, has high raw material conversion rate and adiponitrile selectivity, has low operation cost, and is suitable for large-scale industrial production.

The invention discloses a defect control synthesis method for a zeolite imidazole framework material with pre-component introduction and selective etching and catalytic hydrogenation application, and belongs to the field of inorganic and organic material design. According to the invention, a method of mixing ligands at room temperature is adopted, the proportion of two ligands added during synthesis is controlled to prepare a zeolite imidazole framework material with an adjustable and controllable ligand proportion, and the heating condition of the zeolite imidazole framework material is controlled to completely remove the thermally unstable ligands without influencing the structure of the thermally stable ligands. And further obtaining the zeolite imidazole framework material with quantitative defects. According to the method, defects are constructed, and meanwhile, a hindered Lewis acid-base pair (FLP) is formed and can be used for catalytic hydrogenation reaction. The synthesis method is simple in preparation process and can be widely applied to various different mixed ligand zeolite imidazole frameworks, so that FLP defect sites are obtained, and the defect amount and FLP catalytic sites in a zeolite imidazole framework material are controlled.

The application relates to the technical field of metal organic framework functional materials, and discloses a ZIF-8-based super-hydrophobic MOF as well as a preparation method and application thereof. The ZIF-8-based super-hydrophobic MOF is prepared by the following method: 2-methyl imidazole and fluorine-containing ligand FL are used as mixed ligands to perform a coordination reaction with Zn ions to obtain ZIF-8-FL material; the ZIF-8-FL material is grafted and modified with a modifying agent under the action of an acid-binding agent, and the ZIF-8-based super-hydrophobic MOF is obtained; wherein the modifying agent is alkyl acid chloride or fluorine-containing anhydride. The ZIF-8-based super-hydrophobic MOF is prepared by introducing mixed ligands and grafting and modifying, and has the advantages of simple process, low cost and suitability for large-scale production. The ZIF-8-based super-hydrophobic MOF prepared by the application has high chemical stability and excellent hydrophobic performance in an acidic environment, avoids the defect that conventional MOFs are prone to degradation, has excellent separation efficiency and selectivity in an oil-water separation process, can effectively separate oil-water mixtures in various complex systems, and has wide market application prospect and economic benefits.

The invention belongs to the technical field of catalytic materials, and particularly relates to a carbon dioxide cycloaddition reaction catalyst and a preparation method and application thereof. Two novel metal organic framework carbon dioxide cycloaddition reaction catalysts are prepared by adopting mixed ligands, and the structures of the catalysts are characterized. The catalytic efficiency of cycloaddition of the compound to epoxypropane within 24 h is the highest and reaches 99% or above, and the structure of the compound is kept stable after three times of circulation. In addition, under the conditions, the catalyst also has certain catalytic activity on epoxy chloropropane, epoxy bromopropane, styrene oxide and other epoxy compounds. Especially, the epoxypropane structure is kept stable after three times of circulation. Therefore, the invention provides a new technical path for efficient utilization of carbon dioxide under mild conditions, and also provides a good foundation for designing a better heterogeneous catalytic system in the field of global climate control to continuously fix carbon dioxide.

The invention relates to a rare earth terbium-based metal organic framework fluorescent probe, preparation and application of the rare earth terbium-based metal organic framework fluorescent probe in detection of ciprofloxacin in a water environment. The structural formula of the rare earth terbium-based metal organic framework fluorescent probe is [Tb2 (TFPA) 3 (Terpy) 2 (H2O) 3] n 2nEtOH, Tb < 3 + > serves as a rare earth sensitization luminescence center, tetrafluoroisophthalic acid (TFPA) and terpyridine (terpy) serve as mixed ligands, and the rare earth terbium-based metal organic framework fluorescent probe is synthesized in a mixed solvent of water and ethyl alcohol through a normal-temperature volatilization method. The preparation method is mild in condition and convenient to operate. The obtained Tb-MOF fluorescent probe shows high-selectivity fluorescence recognition capability on antibiotic ciprofloxacin (Cip), and has the advantages of high detection sensitivity (the detection limit is 26.17 nM), short response time (2 minutes), macroscopic fluorescence change and the like. The invention provides an effective means for rapid and high-sensitivity detection of ciprofloxacin in a water system.

This invention discloses a thiol-functionalized polyvinyl alcohol (PVA) / sodium alginate (SA)@ZIF-67 composite hydrogel, its preparation method, and its applications. The preparation method uses PVA and SA as matrices, forming hydrogel spheres through ionic crosslinking. After adsorbing cobalt ions, thiol-functionalized ZIF-67 crystals are grown in situ in a mixed ligand solution containing 2-methylimidazole and 2-mercapto-1-methylimidazole to obtain the PVA / SA@SH-ZIF-67 composite hydrogel. This invention achieves efficient adsorption and integrated "adsorption-reduction-fixation" removal of Cr(VI) by introducing thiol-functionalized ZIF-67 into the hydrogel network, utilizing the strong coordination and chemical reduction effects of thiol groups on hexavalent chromium. This composite hydrogel has advantages such as large adsorption capacity, high removal efficiency, and easy separation and recovery, and has broad application prospects in the field of heavy metal wastewater treatment.

In the production of the MOF film composite, a CAU-10-type MOF seed crystal is adhered to a support (step S12), an Al source solution, which is an aqueous solution containing an Al ion source, is prepared (step S13a), and a ligand solution in which an organic ligand used in the synthesis of the CAU-10-type MOF is dissolved in a solvent is prepared (step S13b). Next, a raw material solution is prepared by mixing a ligand solution with an Al source solution at a rate that does not cause turbidity (step S14). A support is immersed in a raw material solution, and a MOF film, which is a CAU-10-type MOF, is formed on the support by solvothermal synthesis (step S15).

A layered semiconductor device comprising a mixed ligand compound, the mixed ligand compound comprising: a cyclophosphazene core moiety, a first ligand moiety, and a second ligand moiety. The first ligand moiety and the second ligand moiety are each bonded to the core moiety. A composition comprising a plurality of compounds, each compound thereof comprises a cyclophosphazene core moiety, and at least one ligand moiety bonded to the cyclophosphazene core moiety; the plurality of compounds comprises at least one ligand moiety in common.

A layered semiconductor device comprising a mixed ligand compound, wherein the mixed ligand compound comprises a cyclophosphazene core portion, a first ligand portion, and a second ligand portion. The first ligand portion and the second ligand portion are each bonded to the core portion. A composition comprising a plurality of compounds, each of which comprises a cyclophosphazene core portion and at least one ligand portion bonded to the cyclophosphazene core portion, wherein the plurality of compounds all have at least one ligand portion in common.

The invention belongs to the field of biochemical engineering, and particularly relates to double-ligand calcium-based metal organic framework immobilized nitrilase as well as a preparation method and application thereof. The binary metal organic framework immobilized nitrilase (Nit (at) MOF (1)) is formed through competitive coordination by utilizing a mixed ligand strategy, and the enzyme activity recovery rate, the protein loading rate and the thermal stability of the prepared immobilized nitrilase are improved. The immobilized enzyme carrier constructed by the invention has better biocompatibility, has the advantages of easiness in separation, reusability and high enzyme loading amount, and is an ideal immobilized enzyme carrier. According to the metal organic framework immobilized nitrilase constructed by the invention, the interaction between the carrier and the enzyme is finely adjusted by changing the pore channel microenvironment, and the preparation method is simple, mild in reaction condition and easy to operate.