134results about "Iron organic compounds" patented technology

Described herein is a catalyst comprising a nitrogen-doped carbon matrix, iron atoms, iron carbide particles, and carbon nanotubes, wherein the carbon nanotubes are dispersed and bonded to the nitrogen-doped carbon matrix, the iron atoms, and the iron carbide particles are dispersed and bonded to the nitrogen-doped carbon matrix and / or the carbon nanotubes. The catalyst may be used to coat an electrode for use in an electrochemical cell and electrolysis.

The invention belongs to the technical field of asymmetric catalysis, and discloses a chiral phosphine nitrogen-nitrogen tridentate ligand based on a ferrocene skeleton as well as a preparation method and application of the chiral phosphine nitrogen-nitrogen tridentate ligand. The structural formula of the ligand is shown as (I) or an enantiomer (II) of the ligand. The preparation method comprises the steps of acylation reaction, oxazoline ring construction, aldehyde group introduction, reductive amination and the like, and application in asymmetric hydrogenation reaction, such as asymmetric hydrogenation of aryl ketone. The ligand has a plurality of chiral factors, simultaneously has a potential hydrogen bond donor, forms secondary interaction with a substrate in an asymmetric catalytic reaction, can further stabilize a reaction transition state, is an efficient novel chiral P, N, N-ligand, has the advantages of high reaction activity, good stereoselectivity, wide substrate range and the like, and has a wide application prospect. # imgabs0 #

The invention relates to a non-gadolinium magnetic resonance contrast agent and a preparation method thereof, and belongs to the field of contrast agents. The invention aims to provide a non-gadolinium contrast agent with high biological safety aiming at the risks of renal fibrosis and cerebral deposition existing in a gadolinium-based magnetic resonance contrast agent. The invention provides a phosphate group modified non-gadolinium magnetic resonance contrast agent. The phosphate group modified non-gadolinium magnetic resonance contrast agent consists of a ligand of a phosphate group substituted trans-cyclohexanediamine tetraacetic acid derivative (tmPCDTA or tqPCDTA) and metal ions Fe < 3 + > or Mn < 2 + >, the contrast agent disclosed by the invention is high in biological safety: endogenous Fe < 3 + > / Mn < 2 + > is used for replacing gadolinium, and cell experiments prove that the survival rate of 4T1 cells is not influenced at the concentration of 500 mu M; clinical applicability is high, kidney excretion is rapid, bladder signals are enhanced 3-5 minutes after mouse intravenous injection, and liver retention is avoided.

The application discloses a method for synthesizing tervalent tetraaryl iron porphyrin from pyrrole, aromatic aldehyde and ferrous salt, which comprises the following steps: adding anhydrous aluminum chloride, aromatic aldehyde, pyrrole and ferrous salt into DMF under stirring, and then heating and refluxing the reaction mixture for 0.5 hours under nitrogen; removing the nitrogen and continuing to heat the reaction mixture for a certain time; stopping the reaction; cooling the reaction mixture; and placing the reaction mixture at 273K overnight; and finally filtering the reaction mixture to obtain the iron porphyrin.

The application discloses a kind of post-transition metal complexes and preparation method and application thereof, and the post-transition metal complex provided by the application can be applied to the polymerization of ethylene as catalyst, and the molecular weight of polymer is regulated by changing ligand structure and polymerization condition;Especially by changing its metal center, the molecular weight distribution of polyethylene has obvious regulating effect, wherein the polyethylene obtained by iron complex catalysis has relatively wide molecular weight distribution (M w / M n :2.0-10.7), and the molecular weight of polyethylene obtained by cobalt complex catalysis is mostly narrow (M w / M n :1.6-2.2), and both can be used to prepare highly linear polyethylene.The preparation method of the complex described in the application has the advantages of mild conditions, short cycle, simple operation, etc.The complex prepared by the method shows high catalytic activity, which can be up to 2.56×10 7 g (PE) (mol Fe) ‑1 h ‑1 , and high thermal stability, which meets the operating temperature of industrial production and has further industrial application prospect.

The application relates to the technical field of fine chemical synthesis, and discloses a PDI catalyst for preparing cresol trisiloxane, a preparation method and a preparation method of cresol trisiloxane. Me PDI)FeBr2, sodium and nai are dissolved in an ultradry solvent, and the reaction is stirred under a nitrogen atmosphere; the reaction product is post-treated to obtain a PDI catalyst; 2-(2'-hydroxy-3'-methylethenyl-5'-methylphenyl) benzotriazole and the PDI catalyst are dissolved in an organic solvent, the temperature is increased to 50-60 DEG C, bistrimethylsiloxy methylsilane is added dropwise, and the reaction is preserved for 6-10 h; the organic solvent is removed by concentration under reduced pressure, and crystallization is carried out to obtain cresol trisiloxane. The iron complex catalyst is used to replace the traditional platinum catalyst, the material cost is reduced, the risk of heavy metal residue can be avoided, a small amount of the iron complex catalyst can be used, and higher catalytic activity and selectivity can be realized.

The application provides a flexible ortho-aryloxy cycloalkyl substituted pyridine diimine iron and cobalt complex catalyst and a preparation method and application thereof, and belongs to the technical field of olefin polymerization catalysis; a series of 2,4,6-tricycloalkyl arylamine compounds are introduced into 2,6-diacetyl pyridine, and with the change of the space volume of the cycloalkyl, the molecular weight and distribution of polyethylene can be controlled; the substituents in the complex are selected from cycloalkyl, and under the protection of a gas atmosphere, the ligand is reacted with FeCl2.4H2O and CoCl2.6H2O respectively to obtain the complex catalyst of the present application; the complex exhibits extremely high polymerization activity, up to 1.76*10 7 g / mol.h, and generates high linear polyethylene with different molecular weight ranges; and has good industrial potential.

The present invention relates to a cooling / heating method comprising the application and removal of a pressurising gas on a hybrid organic-inorganic porous material (MOF) whereby a breathing transition is produced, in which a change in volume in the structure of the compound occurs when its pores open / close, together with adsorption / desorption of a gas after applying and removing a pressurising gas on the compound; breathing which occurs at temperatures close to ambient temperature (from -20°C to 60°C) and at low pressures (from 10-5 bar up to 50 bar) and with great isothermal entropy changes (> 100 J K-1 kg-1). The invention also relates to a cooling / heating device comprising the hybrid materials defined above.

To provide a method for preparing an in situ metal doped manganese iron oxalate precursor.SOLUTION: Iron source, manganese source, doped metal elements (Mg, Zn, etc.) are weighed according to a stoichiometric ratio, and deionized water is added to the weighed metal to ultrasonically dissolve the weighed metal to obtain a mixed metal solution. The mixed metal solution is added to a prepared oxalic acid solution and subsequently a certain concentration of complexing agent is added to the solution to perform co-precipitation reaction under the protection of inert gas. A resultant suspension of metal doped manganese iron oxalate is recovered and then filtered, washed and dried to obtain a powder of manganese iron oxalate precursor.EFFECT: By using the manganese iron oxalate precursor as the iron and manganese sources, this can effectively avoid the problem of uneven mixing due to the iron and manganese sources. Moreover, lithium manganese iron phosphate synthesized from the manganese iron oxalate precursor after metal doping can significantly improve the electronic conductivity, thereby enhancing the electrochemical properties of lithium manganese iron phosphate.SELECTED DRAWING: Figure 1

The present invention discloses a new method for synthesizing 4-arylbutyronitrile compounds, that is, under visible light irradiation, a catalytic system composed of an iron(III) complex [HIBnBn CN [FeCl4] (where [HIBnBn CN =1-(4-cyanobenzyl)-3-benzylimidazolium cation) and lithium chloride is used to synthesize 4-arylbutyronitrile compounds through the hydroalkylation reaction of acrylonitrile and toluene compounds. This is the first example of the hydroalkylation reaction of acrylonitrile and toluene compounds realized by visible light-induced iron catalysis, providing a new synthesis method for a series of 4-arylbutyronitrile compounds. This method not only has 100% atom economy, but also has mild reaction conditions and can proceed smoothly at room temperature only with visible light, a simple and easily available iron(III) complex and lithium chloride, which is beneficial to large-scale synthesis applications. Therefore, the synthesis method provided by the present invention conforms to the concept of sustainable green synthesis chemistry.

This invention discloses an iron complex with a triazacyclic nonane macrocyclic skeleton, its preparation method, and its applications, belonging to the field of coordination chemistry. The iron complex has a triazacyclic nonane macrocyclic skeleton with two acetate side groups and one pyridine-N derivative side group. The iron complex exhibits excellent catalytic activity in the aerobic oxidation of N-aryltetrahydroisoquinoline, while also possessing good stability. The solvents for the catalytic reaction are water and acetonitrile, resulting in low pollution. This invention features mild reaction conditions, simple synthesis operations, and straightforward post-processing, meeting the requirements of environmental friendliness and clean production.

The present invention discloses an inorganic-organic hybrid carbonyl radical luminescent material, its preparation method and application, belonging to the technical field of luminescent materials. In the inorganic-organic hybrid carbonyl radical luminescent material provided by the present invention, the common feature is that the tris-carbonyl substituted benzene derivative molecule after weak coordination with metal is used as the guest, and a series of imidazolium salt ionic liquid molecules are used as the host, and a supramolecular assembly is formed by the way of host-guest doping; the electrostatic interaction and electron delocalization effect generated in the system protect the carbonyl radical to emit stable light; the metal ions coordinated with the radical molecules in the assembly regulate the photophysical properties of the inorganic-organic hybrid carbonyl radical luminescent material through charge transfer. The synergistic effect of the three components enables the inorganic-organic hybrid carbonyl radical luminescent material of this type to obtain the property of adjustable emission color and realize the dual-mode detection of Cd<supgt;3+< / supgt; (turn off type) and Pb<supgt;3+< / supgt; (turn on type).

The invention discloses a low-background iron-based magnetic resonance contrast agent and a synthesis method and application thereof.According to the low-spinning ferrous iron-based contrast agent, a group capable of breaking bonds through a biological orthogonal catalytic reaction is introduced, amine is generated through biological orthogonal catalytic cracking, obtained aniline is unstable, then 1, 6-elimination occurs in molecules, triazole groups are removed, and the contrast agent is prepared. And then the rest part of the plumbing arm is cracked to finally become a high-spinning ferrous contrast agent. The relaxation rate of the contrast agent is improved through conversion of high and low spin states, low-background activation is achieved, the contrast ratio of magnetic resonance imaging signals is improved, and imaging of a focus area is expected to achieve early detection of serious diseases.

This application discloses a dialkylphosphine hybrid salt, its preparation method, and its application. The dialkylphosphine hybrid salt is selected from at least one compound having the chemical formula shown in formula (I). The dialkylphosphine hybrid salt with the composition of formula (I) provided in this application requires a small amount to add, has high flame retardant efficiency for various polymer materials, and is economical. It not only overcomes the disadvantage of low flame retardant efficiency of diethylphosphine salt for polymer materials, but also overcomes the disadvantage of excessive volatility and low flame retardant efficiency of diisobutylphosphine salt for polyesters. It can be widely used in the flame retardant application of various polymer materials that require high-temperature processing.

The present application relates to a kind of methods for adsorbing and separating propylene and propane, which includes the adsorption separation of propylene and propane with metal organic framework, wherein the metal organic framework material is formed by the coordination assembly of divalent metal ion, malic acid and pillar supporting ligand.The metal organic framework material involved in the present application is stable in structure and performance, has high adsorption capacity for propylene, can realize the efficient thermodynamic-kinetic synergistic separation of propylene and propane, and the adsorption performance remains the original effect after repeated adsorption-regeneration multiple times.The performance in the adsorption separation of propylene and propane is far superior to most solid adsorbents.

The invention discloses an iron complex with a triazacyclononane macrocyclic skeleton as well as a preparation method and application of the iron complex, and belongs to the technical field of coordination chemistry. The iron complex has a triazacyclononane macrocyclic skeleton, and is attached with two acetate side groups and one pyridine-N derivative side group; the iron complex shows excellent catalytic activity in the aerobic oxidation reaction of N-aryl tetrahydroisoquinoline and has good stability, solvents for the catalytic reaction are water and acetonitrile, and pollution is small. The method is mild in reaction condition, simple in synthesis operation and simple in post-treatment, and meets the requirements of environment friendliness and clean production.

The invention provides a complex, a catalyst composition, a preparation method and application and an ethylene oligomerization reaction method, and relates to the technical field of ethylene oligomerization. The structural formula of the complex is shown as a formula (I), in the formula (I), R1-R13 are the same or different and are independently selected from any one of hydrogen, C1-C6 alkyl, halogen, C1-C6 alkoxy, nitryl and C6-C10 aryl; and R14-R16 are the same or different and are respectively and independently hydrogen or C1-C20 alkyl groups. The complex can be completely dissolved in an organic solvent, the concentration of the complex can be accurately metered in industrial operation, and stable operation of the reaction is ensured. The catalyst composition comprises the complex, so that under the action of the catalyst composition, the ethylene oligomerization reaction is rapid in initiation, stable in operation and good in repeatability.

The present invention relates to a composition for inducing dendritic cell differentiation, comprising a metal-organic framework, and a use thereof, the composition having the effect of not only enabling the increasing of the expression of surface protein markers of dendritic cells, but also enabling the inducing of differentiation into dendritic cells having enhanced viability and migration properties when administered into an individual.

Disclosed herein is an invention that refers to hydrochloride metformin complexes with transition metals and group P elements, such as cobalt (II), nickel (II), copper (II), zinc (III), iron (II), bismuth (III) and their preparation method. Additionally, the present invention offers crystalline forms of the metformin-cobalt (II) complex, metformin-nickel complex and metformin-copper complex as well as methods for therapeutic use in patient treatment and their preparation method.

The invention discloses a metal carborane quaternary ammonium salt compound as well as a synthesis method and application thereof. The structural formula of the compound is as shown in a formula I in the specification. According to the synthesis method, n-hexyl carborane is taken as a starting raw material and is subjected to four-step efficient reaction, and the synthesis method comprises the following steps: 1, carrying out boron removal reaction to generate a nested carborane intermediate; 2, preparing trimethylamine salt and converting the trimethylamine salt into carborane trimethylamine salt; 3, carrying out coordination reaction on the carborane trimethylamine salt and ferrous chloride to form a metal carborane precursor; and 4, further processing to finally form the target metal carborane quaternary ammonium salt compound. The compound disclosed by the invention shows potential application value in the fields of homogeneous catalysis, solid propellant burning rate regulation and control and the like. I.

This decomposition catalyst is used for the decomposition of an organic fluorine compound. This decomposition catalyst has a carrier and a complex. The complex is supported by the carrier. The carrier is composed of a conductor or a semiconductor. The complex is represented by formula (1) and is formed of a transition metal and a π-electron-containing organic ligand. The organic fluorine compound may be a perfluoroalkyl compound and / or a polyfluoroalkyl compound. In formula (1), M may be at least one element that is selected from the group consisting of Mn, Fe, Co, Ni, Cu, Ru, Rh, Cr, V, Mo, Re, and Os.　

The present application provides a continuous reaction system, a manganese iron oxalate precursor, a lithium manganese iron phosphate, and a manufacturing method and a secondary battery. The manufacturing method of the manganese iron oxalate precursor provided by the present application is a continuous manufacturing method, which improves production efficiency, simplifies the manufacturing process, and can obtain a manganese iron oxalate precursor with small particle size, narrow particle size distribution, uniform element distribution, high crystallinity, regular shape, and high batch production stability and consistency.

Disclosed is a method for preparing a metal-carbon composite. The method includes synthesizing a planarized ligand compound via planarization-modification of a polyphenol-based ligand compound; synthesizing a metal-organic composite via hydrothermal synthesis of a mixed solution of the planarized ligand compound and metal ions; drying the metal-organic composite to prepare precursor powders; and carbonizing the precursor powders.

The invention relates to the fields of coordination chemistry and metal organic chemistry, and discloses a single iron hydrogenase model compound containing 3, 4 and 5-substituted pyridine ligands, the chemical structural formula is as follows: # imgabs0 #, R1 and R2 are identical or different monodentate ligands or R1 and R2 represent bidentate ligands, and R3 and R5 are identical or different and represent H or C1-C6 alkyl. R4 represents H or hydroxyl. The recombinase obtained by recombining the single iron hydrogenase model compound and decoenzyme has better stability and higher catalytic activity.

To provide a method for preparing an in situ metal doped manganese iron oxalate precursor.SOLUTION: Iron source, manganese source, doped metal elements (Mg, Zn, etc.) are weighed according to a stoichiometric ratio, and deionized water is added to the weighed metal to ultrasonically dissolve the weighed metal to obtain a mixed metal solution. The mixed metal solution is added to a prepared oxalic acid solution and subsequently a certain concentration of complexing agent is added to the solution to perform co-precipitation reaction under the protection of inert gas. A resultant suspension of metal doped manganese iron oxalate is recovered and then filtered, washed and dried to obtain a powder of manganese iron oxalate precursor.EFFECT: By using the manganese iron oxalate precursor as the iron and manganese sources, this can effectively avoid the problem of uneven mixing due to the iron and manganese sources. Moreover, lithium manganese iron phosphate synthesized from the manganese iron oxalate precursor after metal doping can significantly improve the electronic conductivity, thereby enhancing the electrochemical properties of lithium manganese iron phosphate.SELECTED DRAWING: Figure 1