168results about "Iron organic compounds" patented technology

The invention belongs to the field of fine chemical engineering, and particularly relates to an N-heterocyclic carbene complex catalyst and application of the N-heterocyclic carbene complex catalyst in pipelined continuous synthesis of a silane coupling agent. The invention provides an N-heterocyclic carbene complex catalyst, which comprises a ligand and an active component, the ligand is an N-heterocyclic carbene ligand, and the active component is a transition metal; the molar ratio of the N-heterocyclic carbene ligand to the transition metal is 1: 1. The invention also provides a method for pipelined continuous synthesis of the silane coupling agent, which comprises the following steps: carrying out homogeneous hydrosilylation reaction in a pipelined reactor by taking hydrogen-containing silane and unsaturated hydrocarbon as raw materials in the presence of an N-heterocyclic carbene complex catalyst to obtain the silane coupling agent. The spatial configuration and the electronic property of the N-heterocyclic carbene ligand precursor are designed and regulated, so that the N-heterocyclic carbene ligand precursor is matched with transition metal, and the N-heterocyclic carbene ligand precursor can be applied to hydrosilylation reaction.

A process for preparing a mixed-metal metal-organic framework. The process comprises providing a hydrogen bonded metal organic framework (HM1OF); soaking the hydrogen bonded metal organic framework (HM1OF) in a metal (M2)-comprising solution; and forming a mixed-metal MOF (M1OF-M2), where M1 and M2 are different metals.

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 #

Some embodiments relate to precursors, including intermediate precursors, and related methods. To produce the intermediate precursor, a mixture of bis(arene) metal complexes is combined with a first arene. The mixture of bis(arene) metal complexes first arene is heated and then cooled. Upon cooling, the bis(first arene) metal complexes precipitate out of solution to produce the high purity intermediate precursor. To produce the precursor, the bis(first arene) metal complexes are contacted with a second arene to produce the high purity precursor.

Compounds with redox molecular cores and branched molecular tails comprising ionic functionalities for uses as electrolytes in redox flow batteries are described, as well as methods of synthesis and use thereof. The compounds have redox active perylene diimide or ferrocene molecular core decorated with the branched molecular tails having multiple ionic functionalities to improve water solubility of the molecular core, and, as such, its performance as the electrolyte.

The present application discloses a dialkylphosphinic acid hybrid salt and its preparation method and use, and the dialkylphosphinic acid hybrid salt is at least one selected from compounds having the chemical formula shown in formula (I). The dialkylphosphinic acid hybrid salt having the composition of formula (I) according to the present application has a small amount of addition, a high flame retardant efficiency for various polymeric materials, and is economically excellent, which not only overcomes the disadvantages of diethylphosphinic acid salt, which is low in flame retardant efficiency for polymeric materials, but also overcomes the disadvantages of diisobutylphosphinic acid salt, which is too volatile and low in flame retardant efficiency for polyester, but can also be widely used in the flame retardancy of various polymeric materials that require high-temperature processing. JPEG2024536906000030.jpg50153

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.

To provide high purity ferric citrate which substantially does not contain β-iron oxide hydroxide.SOLUTION: Provided is high purity ferric citrate which substantially does not contain β-iron oxide hydroxide, where a content of β-iron oxide hydroxide relative to the total weight is less than 6 wt%; preferably, high purity ferric citrate where a content of β-iron oxide hydroxide is less than 2.5 wt%; and more preferably, high purity ferric citrate where a content of β-iron oxide hydroxide is less than 1.0 wt%.SELECTED DRAWING: None

The present invention relates to a compound of formula (I) as well as to an organic electronic device comprising a semiconductor layer which comprises a compound of formula (I).

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 compound represented by Formula (I), wherein M is a metal; L is a charge-neutral ligand, which coordinates to the metal M; n is an integer selected from 1 to 4, which corresponds to the oxidation number of M; m is an integer selected from 0 to 2; R1, R2 and R3 are substituents; a semiconductor material comprising at least one compound of formula (I), an semiconductor layer comprising at least one compound of formula (I) and an electronic device comprising at least one compound of formula (I).

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 provides a flexible o-aryl cycloalkyl substituted pyridine diimine iron and cobalt complex catalyst as well as 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-diacetylpyridine, and the molecular weight and distribution of polyethylene can be regulated and controlled along with the change of the cycloalkyl space volume; a substituent group in the complex is selected from naphthenic base, a ligand is respectively reacted with FeCl2. 4H2O and CoCl2. 6H2O in a protective gas atmosphere to obtain the complex catalyst in the scheme, the complex shows extremely high polymerization activity which is as high as 1.76 * 10 < 7 > g / mol.h, and high linear polyethylene with different molecular weight ranges is generated; and the method has good industrial potential value.

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 a quinoxaline-5-carboxylic acid coordinated catalyst and a preparation method thereof. B is a sodium ion, a magnesium ion, a calcium ion, an aluminum ion, a rubidium ion, a cesium ion, an ammonium ion, a tetradecyl dimethyl benzyl ammonium ion, a tetradecyl trimethyl ammonium ion, a hexadecyl trimethyl ammonium ion, a hexadecyl dimethyl benzyl ammonium ion, a tributyl octyl phosphonium ion, a tetrapropyl phosphonium ion and a dipropyl dibutyl phosphonium ion; the phosphonium ions are dibutyl dihexyl phosphonium ions, tetraheptyl phosphonium ions, tetrabutyl phosphonium ions, tetrabenzyl phosphonium ions, tetraheptyl ammonium ions, dimethyl diethylammonium ions, benzyl trihexyl ammonium ions, tribenzyl phenyl phosphonium ions or tetraphenyl ammonium ions; m is Sc, Ti, Mo, Fe, Ni, Tc, Zn, Zr, Cr, Mg or W; r is alkyl with 1 to 25 carbon atoms; x is an integer between 1 and 20; and y is an integer between 1 and 40. The catalyst can improve the oxidation reaction selectivity and conversion rate of ortho-nitrotoluene.

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 process for the hydrosilylation of an unsaturated compound containing at least one alkene or at least one alkyne functional group with a compound containing at least one hydrosilyl functional group, said process being catalyzed by an iron complex C of formula (1): Fe[Si(SiR3)3]2L n (1) (wherein each R is independently a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms which may be substituted with one or more halogen atoms, and each L is an ether ligand, and n=1, 2 or 3.) The present invention also relates to a method for producing the iron complex, and to the use of the iron complex as a catalyst for hydrosilylation of alkenes or alkynes.

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.