327results about "Nickel organic compounds" patented technology

The invention provides a ligand compound and a preparation method thereof, a complex and a preparation method and application thereof, and belongs to the technical field of polyolefin, the ligand compound has a structure as shown in formula (I) or formula (II): # imgabs 0 # formula (I) and # imgabs 1 # formula (II); b1, b2, b3, R1 and R2 are respectively and independently selected from any one of hydrogen, substituted or unsubstituted alkyl with 1 to 5 carbon atoms, alkenyl with 2 to 6 carbon atoms, alkynyl with 2 to 6 carbon atoms, alkoxy with 1 to 5 carbon atoms, aryl with 6 to 30 carbon atoms and fused ring aryl with 10 to 50 carbon atoms; r1 and R2 are connected to form a ring or are not connected to form a ring; b1, b2, b3, b4 and b5 are respectively and independently selected from any one of hydrogen, substituted or unsubstituted C1-C5 alkyl, C2-C6 alkenyl, C2-C6 alkynyl and C1-C5 alkoxy; c1, c2 and c3 are respectively and independently selected from any one of hydrogen, substituted or unsubstituted alkyl with 1 to 5 carbon atoms, alkenyl with 2 to 6 carbon atoms, alkynyl with 2 to 6 carbon atoms, alkoxy with 1 to 5 carbon atoms and phenoxy; r1, R2, R3 and R4 are respectively and independently selected from any one of hydrogen, substituted or unsubstituted C1-C5 alkyl, C3-C10 cycloalkyl and substituted phenyl.

The present invention provides an amidinate compound represented by the following general formula (1) or a dimer compound thereof, and a method of producing a thin-film including using the compound as a raw material:where R1 and R2 each independently represent an alkyl group having 1 to 5 carbon atoms, R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, M represents a metal atom or a silicon atom, and “n” represents the valence of the atom represented by M, provided that at least one hydrogen atom of R1 to R3 is substituted with a fluorine atom.

Mixed metal metal-organic frameworks (MM-MOFs) of copper-1,3,5-benzenetricarboxylate (BTC), M-Cu-BTC, wherein M is Zn(II), Ni(II), Co(II), and / or Fe(II) may be made using post-synthetic exchange (PSE) with metal ions. Such MM-MOFs may be used in H2 storage, especially Ni(II) and Co(II) MM-MOFs. Selected metal exchanged materials can provide gravimetric H2 uptake around 1.63 wt. % for Zn—Cu-BTC, around 1.61 wt. % for Ni—Cu-BTC, around 1.63 wt. % for Fe—Cu-BTC, and around 1.12 wt. % for Co—Cu-BTC.

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.

The invention provides a light response type mononuclear nickel / palladium complex for preparing ultra-high molecular weight polyethylene and a preparation method and application of the light response type mononuclear nickel / palladium complex, the structural formula of the light response type mononuclear nickel / palladium complex is as follows: # imgabs0 #. The light response type nickel / palladium complex provided by the invention has a rigid diphenylethylene skeleton and is converted from trans-configuration (E) to cis-configuration (Z) under irradiation of 365nm ultraviolet light; under the irradiation of 405nm ultraviolet light, a cis-configuration (Z) is converted into a trans-configuration (E). Therefore, the ratio of the E-type configuration to the Z-type configuration in the photoresponse type nickel complex can be accurately regulated and controlled by utilizing ultraviolet irradiation, and the photoresponse type nickel complex is used as a catalyst to regulate the reaction rate of two different sites in the olefin polymerization process, so that the molecular weight of a polyolefin material and the insertion rate of a polar monomer are regulated and controlled. The molecular weight distribution of the obtained ultrahigh molecular weight polyethylene is 1.60-2.57, and the molecular weight is 632-1184 * 10 < 4 > g.mol <-1 >. The catalyst has ultrahigh catalytic activity, can be used for producing high-performance polyethylene, can greatly reduce the production cost of the catalyst, and has great industrial application potential.

The invention belongs to the technical field of preparation of transition metal organic photocatalysts, and particularly relates to design and a preparation method of a carbazole terpyridyl nickel catalyst. The invention aims to design and synthesize a carbazole terpyridyl nickel catalyst with light / nickel synergistic catalytic activity. The preparation method comprises the following specific synthesis steps: reacting different types of alpha-pyridone pyridinium and alpha, beta-unsaturated ketone in methanol, and carrying out suction filtration, washing, drying and other operations to obtain the corresponding carbazole terpyridyl ligand. The carbazole terpyridyl ligand and anhydrous nickel bromide are subjected to a heating reflux reaction in a tetrahydrofuran solution, and the corresponding carbazole terpyridyl nickel catalyst is obtained through methanol washing, suction filtration, drying and other operations. The terpyridyl nickel catalyst has high catalytic activity in a C-N, C-O and C-S coupling reaction promoted by visible light.

The invention relates to the technical field of polyethylene, in particular to high-performance UHMWPE (ultrahigh molecular weight polyethylene) and a slurry method preparation process thereof, monomer ethylene is used as a raw material, a catalyst is added into a solvent, a polymerization reaction is performed under the conditions that the temperature is 60-100 DEG C and the pressure is 0.1-10 MPa, after the reaction is finished, post-treatment is performed to obtain a UHMWPE product, a late transition metal catalyst with 2, 6-diketone as a skeleton is used as a main catalyst. The bimodal UHMWPE is prepared through one-step reaction by utilizing the high activity and thermal stability of the diimine late transition metal catalyst, and the processing performance of the product is improved.

The invention discloses a full-flexible alpha-diimine catalyst and a catalytic application thereof. According to the invention, 1, 2-cyclohexanedione is taken as a core skeleton, and a flexible and large-steric-hindrance naphthenic imine group is ingeniously grafted on the core skeleton, so that the innovative design greatly improves the efficiency of a catalytic system and promotes the generation of polyethylene with higher branching degree and higher molecular weight. The prepared polyethylene material is expected to become a new favorite of high-performance thermoplastic elastomers by virtue of excellent mechanical properties and excellent elastic recovery capability. In a palladium-catalyzed ethylene polymerization reaction, the full-flexible palladium catalyst shows moderate catalytic activity, and a generated polyethylene product is high in branch density, and the molecular weight is also remarkably improved. More noticeably, under the copolymerization experiment condition, the efficient doping of the polar monomer methyl acrylate is successfully realized, the copolymer with considerable polar monomer content is prepared, and a new path is opened up for the modification and functionalization of the polyethylene material.

This invention relates to nickel catalysts with alkali ions for homopolymerization and copolymerization.

The application discloses an energetic material, a preparation method thereof and application of the energetic material as explosives and self-ignition propellants. I C 12 H 12 N 10 or M Ⅱ C8H6N8; wherein, M I is selected from Co, Ni and Cu; M Ⅱ is selected from Zn. The energetic material is convenient to synthesize, has good thermal stability, excellent mechanical sensitivity, excellent propelling performance and specific impulse, has a significant energy density advantage, can effectively solve the problem of continuous evaporation of hydrazine propellants during storage, avoid the risk of internal pressure increase of a fuel tank, and overcome the problems of liquid fuel in the storage and transportation process. Therefore, the innovative high-performance energetic material has excellent performance and wide application potential, and has great commercial value in the fields of aviation, aerospace and military.

The invention discloses a neutral phosphine phenol nickel catalyst based on a tert-butyl structure. The catalyst has a structure shown as a formula (I), wherein R1 and R2 are respectively and independently selected from hydrogen, C1-C20 alkyl, fluorine, chlorine, bromine, iodine, nitryl, hydroxyl, substituted silicon group and C1-C20 substituted alkyl; r3 is independently selected from C1-C20 alkyl, C1-C20 substituted alkyl, phenyl or substituted phenyl, R4 and R5 are independently selected from hydrogen, fluorine, chlorine, bromine, iodine, C1-C20 alkyl, aryl, an oxygen-containing group, a nitrogen-containing group, a sulfur-containing group, a boron-containing group, an aluminum-containing group, a phosphorus-containing group, a silicon-containing group or a tin-containing group; tert-butyl is introduced into para-position and meta-position of a ligand phenol oxygen ring, and a protection barrier is formed by utilizing the steric hindrance effect of the t-butyl, so that decomposition and deactivation of the catalyst under a high-temperature condition are inhibited, the catalyst can stably play a catalytic role in an industrial common medium-high-temperature polymerization environment, and the process adaptation range of the catalyst is widened.

The present invention relates to novel ligands of formula 1, wherein R1 is each substituted or unsubstituted alkyl, perfluoroalkyl, aryl or cycloalkyl; a cyano group; a sulfonyl-SO2-R10 wherein R10 = a C1-C5 alkyl group, a C5-C6 cycloalkyl group, a C5-C10 aryl group, each unsubstituted or substituted by a C1-C4 alkyl group or a C1-C4 perfluoroalkyl group; silyl-Si (R20R30R40), wherein R20, R30 and R40 are, independently of each other, a C1-C6 alkyl group or a C5-C10 aryl group, which are each unsubstituted or substituted by a C1-C4 alkyl group; r2 is each substituted or unsubstituted alkyl, cycloalkyl, adamantyl or aryl; r3, R4 and R5 are each alkyl, cycloalkyl or aryl, which may be unsubstituted or substituted; or at least two of R3, R4 and R5 are alkyl or alkyl ether bridges and form a heterocyclic ring together with the phosphorus atom, or wherein R3 and R6 and / or R4 and R7 and / or R5 and R8 form an alkyl or alkyl ether bridge together with the nitrogen atom to which it is attached form a heterocyclic ring; r6, R7 and R8 are alkyl or aryl, which may be unsubstituted or substituted, or form a heterocyclic ring, alone or together, with R3, R4 or R5 and the nitrogen atom to which it is attached; m, n and o are 0 or 1, with the proviso that at least one of m, n and o is 1, metal complexes thereof and use for catalytic purposes. # imgabs0 #

The invention provides an alpha-diimine ligand compound, an alpha-diimine nickel catalyst and a preparation method and application of the alpha-diimine ligand compound and the alpha-diimine nickel catalyst, and belongs to the technical field of organic synthesis. Wherein R1 is selected from hydrogen, methoxyl or tertiary butyl; r2 is selected from methyl, ethyl or isopropyl; and R3 is selected from hydrogen or methyl. The alpha-diimine nickel catalyst prepared by adopting the alpha-diimine ligand compound can catalyze olefin to carry out homopolymerization reaction or copolymerization reaction, so that not only is excellent catalytic performance shown, but also a polyolefin material obtained by catalyzing olefin monomer homopolymerization reaction has excellent elastic recovery performance; and the catalyst has certain application potential in olefin polymerization industry.

The invention provides a transition metal nickel complex as well as a preparation method and application thereof. The transition metal nickel complex has a structure as shown in a formula (I), wherein R1, R2, R3, R4 and R5 are independently selected from the following groups substituted by one or more Ra: H, C1-6 alkyl, C1-6 alkoxy, C6-20 aryl or C6-20 heteroatom aryl. The complex provided by the invention has higher catalytic activity and stability in catalysis of olefin polymerization, especially for polymerization of ethylene, has very strong regulation and control performance on the molecular weight of polyethylene, and can be used for preparing highly branched polyethylene.

The present disclosure pertains to a method of sensing an analyte in a sample by: (1) exposing the sample to an electrode that includes a covalent-organic framework with a plurality of metal-coordinated aromatic units that are linked to one another by aromatic linkers; (2) detecting a change in a property of the electrode; and (3) correlating the change in the property to the presence or absence of the analyte. The present disclosure also pertains to said covalent-organic framework and methods of making the covalent-organic frameworks.

The present invention provides a diimine ligand having a general structure shown in Formula L, wherein R1 to R8 are independently selected from H, C1-C6 alkyl, C1-C6 alkoxy, C6-C 12 Aryl or halogen. The diimine ligand is prepared by acid catalysis using a 1,2-diketone compound having an isatin skeleton and a bulky hindered aromatic amine having an aniline skeleton. The present invention also provides a late transition metal polyethylene wax catalyst using the diimine ligand coordinated with a late transition metal salt. The catalyst has high catalytic activity over a wide temperature range and excellent high-temperature stability. The catalyst is used in the preparation of polyethylene wax, and the product has characteristics such as a narrow molecular weight distribution, low branching, and good chemical and physical properties.

The present invention discloses a class of perfluorophenyl-substituted salicylaldimine nickel complexes, a preparation method thereof, and an application thereof in highly active catalytic norbornene polymerization. The preparation method includes the following steps: first metallizing a neutral ligand with sodium hydride, then reacting it with a nickel metal raw material compound in an organic medium, and then obtaining the target compound through filtration, concentration, and recrystallization steps. The perfluorophenyl-substituted salicylaldimine nickel complex of the present invention is a highly efficient norbornene addition polymerization catalyst. The perfluorophenyl-substituted salicylaldimine nickel complex of the present invention has very obvious advantages: the raw materials are easily available, the synthesis route is simple, the product yield is high, the polymerization performance can be regulated by adjusting the substituent structure, and it has a wide application prospect. Its structural formula is shown as follows:

A metal-organic framework according to the present invention provides a metal-organic framework satisfying chemical formula 1. (Chemical formula 1) M+COO--(CH2)n- COO-M+ (M is a metal having a standard reduction potential of -0.8 V to 1.8 V, and n is an integer between 2 and 15.)

A method for producing a metal-organic framework, a metal-organic framework produced therefrom, and a solid-state battery anode comprising the metal-organic framework are provided. The method comprises preparing a precursor solution by introducing a basic additive into a mixed solution containing a co-precursor and an organic ligand (S1), introducing a nickel precursor into the precursor solution and obtaining a precipitate (S2), and obtaining the metal-organic framework by purifying and drying the precipitate (S3).

The present invention relates to a method for the deuteration of organic compounds, particularly the deuteration of silanes (primary, secondary, and tertiary), as well as of the particular borane "pinacolborane", by reacting deuterium gas (D2) and said silanes and / or borane at certain deuteration reaction conditions in the presence of a deuteration reaction catalyst which is an organometallic complex comprising Ni (II) and an organic ligand comprising phosphorous and boron.

The present invention relates to a method for producing a zero-valent nickel compound and a method for producing a polymer.

The invention provides a bidentate aza-matched nickel complex, a preparation method and a nickel metal catalyst for catalyzing olefin polymerization, the bidentate aza-matched nickel complex has a structure as shown in a formula (I), in the formula (I), R1 and R2 are the same or different, and are independently selected from substituted or unsubstituted C1-C10 alkyl, C1-C10 alkoxy, C2-C10 alkenyl or C6-C10 aryl, and R2 and R3 are the same or different and are independently selected from substituted or unsubstituted C1-C10 alkyl, C1-C10 alkoxy, C2-C10 alkenyl or C6-C10 aryl; r3 is selected from hydrogen, methyl, methoxyl and trifluoromethyl; x is selected from chlorine or bromine. According to the bidentate aza-nickel complex provided by the invention, the binding force between amido and nickel metal is stronger, and meanwhile, the imine is substituted by aryl, so that the nickel metal catalyst has a higher heat stabilizer, and is obviously superior to the traditional alpha-diimine nickel catalyst.

The invention relates to the technical field of catalysts, in particular to a neutral nickel catalyst as well as a ligand, a preparation method and application thereof, and the ligand has a structure as shown in a formula I. According to the invention, a series of novel neutral nickel complexes with sandwich-like structures are developed based on an amide-aryl ketone skeleton structure for the first time; the series of catalysts are simple and efficient to synthesize, the ligand synthesis yield is greater than or equal to 80%, and the catalyst synthesis yield is greater than or equal to 80%; nuclear magnetic resonance monitoring shows that the nickel catalyst provided by the invention has high stability in air and does not deteriorate within 72 hours; during polymerization, no extra cocatalyst needs to be added, and the catalyst shows extremely excellent thermal stability and capability of inhibiting chain transfer side reaction in a solution copolymerization process and can resist poisoning of acrylate monomers at the same time.

The application provides an alpha-diamino nickel complex for catalytically preparing polyethylene, realizes control of polymer molecular weight and branching degree by regulating N-aryl ortho groups in the alpha-diamino nickel complex molecules and polymerization conditions, and has the advantages of high catalytic activity, low cost, stable performance and the like. The prepared polyethylene has high molecular weight, narrow molecular weight distribution, high branching degree and excellent mechanical mechanical performance.

The present application relates to a kind of diimine ligand with the general structure shown in formula L, the post-transition metal catalyst prepared by its coordination and its preparation method and application, wherein R1-R6 are independently selected from H, C1-C6 alkyl, C1-C6 alkoxy, C6-C 12 Aryl or halogen. The present application constructs diimine post-transition metal catalyst with different chemical environment of bimetallic active site and rigid parent ring skeleton structure, not only improves catalytic activity and thermal stability, but also can be used for preparing bimodal UHMWPE by ethylene polymerization.

The present invention provides: an alkoxide compound represented by general formula (1); a thin film-forming material containing said compound; and a method for manufacturing a thin film. (In the formula, R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1-5 carbon atoms, or a fluorine atom-containing alkyl group having 1-5 carbon atoms, R3 and R4 each independently represent an alkyl group having 1-5 carbon atoms or a fluorine atom-containing alkyl group having 1-5 carbon atoms, R5 represents a hydrogen atom, a group containing a fluorine atom, or an alkyl group having 1-5 carbon atoms, R6 represents a group containing a fluorine atom, M represents a metal atom or a semimetal atom, and n represents the valence of an atom represented by M. However, if M is a copper atom, R3 and R4 each independently represent an alkyl group having 1-2 carbon atoms, and R5 represents a hydrogen atom.)

This invention provides a highly thermally stable, photoresponsive α-diimine nickel complex, its synthesis method, and its applications, aiming to develop novel olefin polymerization catalysts with both excellent thermal stability and photoresponsive properties. The core photoresponsive switch of this type of nickel complex is a rigid diphenylethylene derivative, which can achieve reversible photoisomerization of the E / Z configuration under 365 nm and 405 nm ultraviolet light irradiation: the E configuration has a relatively open coordination environment; after light irradiation, the Z configuration has a more compact spatial structure, which can form a dual regulatory mechanism: steric hindrance and potential metal-aryl π interactions. Due to this dual regulatory mechanism, the complex exhibits excellent thermal stability at 150 °C. o Even at high temperatures, it still maintains a high value of 0.8 × 10⁻⁶. 6 g·mol ‑1 ·h ‑1 The nickel complex of this invention exhibits enhanced catalytic activity and effectively inhibits chain transfer and chain walking reactions during high-temperature polymerization. By synergistically enhancing thermal stability through configurational tautomerism, and possessing both photoresponsive properties and high catalytic activity, it holds significant research value and broad application prospects in the precise synthesis of functionalized polyolefin materials.

The invention discloses a quantum dot precursor, a preparation method thereof and a quantum dot, and relates to the field of quantum dots. The structural formula of the quantum dot precursor is as shown in a formula (I): # imgabs0 #. The quantum dot precursor provided by the invention is high in stability.