40 results about "Tridentate ligand" patented technology

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 present invention provides a polyurethane epoxy polymer network and its preparation method and application. The present invention belongs to the technical field of braided polymer networks. The preparation method comprises: (1) reacting a polyol, a small molecule chain extender, a diisocyanate and a tridentate ligand to obtain a polyurethane; (2) dissolving the obtained polyurethane in an organic solvent, adding a divalent palladium compound and a monodentate ligand to carry out a coordination reaction; (3) adding an epoxy resin and a curing agent to the reaction solution obtained in step (2), removing the solvent after mixing, and curing to obtain a polyurethane epoxy polymer network. In the present invention, linear polyurethane and epoxy resin are interpenetrated through palladium-coordinated braided nodes, and the braided network is used to enhance the mechanical properties and energy absorption capacity of the polyurethane and epoxy resin, reduce the phase separation tendency between the two polymers, enable the material to withstand higher stress levels, improve its toughness, and improve its maximum elongation and plastic deformation capacity while maintaining the original strength of the polymer.

The invention provides a solid electrolyte coated positive electrode material and a preparation method thereof. The material takes a positive electrode active material as a core layer, and a shell layer contains a glassy-state MOF material, a solid electrolyte and a conductive material. The preparation method comprises the steps of pretreatment of positive electrode particles, preparation of a precursor solution, in-situ MOF coating and the like, wherein parameters such as temperature, pressure, ligand proportion and the like are strictly controlled in each stage of a gradient reaction. Glass MOF is compounded with a conductive material, the crystalline structure stability of the MOF positive electrode material is improved by utilizing a bidentate ligand and a tridentate ligand, and the capacity retention ratio of the positive electrode material is greater than 90% after 1000 times of circulation under 5C multiplying power by virtue of collaborative innovation of gradient defect design and a gradient solvothermal reaction system.

A method of promoting growth in a photosynthetic organism comprising treating the photosynthetic organism with a metal complex or a precursor thereof, wherein the metal complex comprises a metal selected from the group consisting of zinc (Zn), cobalt (Co), copper (Cu), nickel (Ni) and iron (Fe), and a ligand, which is a bidentate or tridentate ligand. Metal complexes and their ligands are also describe.

Disclosed are an organometallic compound, an organic light emitting device including the same, and an electronic device including the organic light emitting device. The organometallic compound is represented by Formula 1, in which M is a transition metal; L1 is a ligand represented by Formula 2 as disclosed herein; L2 is a monodentate ligand, a bidentate ligand, a tridentate ligand, or a tetradentate ligand; n1 is 1, 2, or 3, wherein, when n1 is 2 or more, two or more ligands L1 are the same as or different from each other; n2 is 0, 1, 2, 3, or 4, wherein, when n2 is 2 or more, two or more ligands L2 are the same as or different from each other; and L1 and L2 are different from each other. Formula 1 M(L1) n1 (L2) n2 .

The invention relates to the technical field of DNA intercalating agents, in particular to a near-infrared luminous ruthenium (II) complex, a preparation method thereof and application of the complex as a DNA intercalating agent. The preparation method comprises the following steps: firstly, preparing a precursor 4 '-(1H-benzimidazole-2-yl)-2, 2': 6 ', 2' '-terpyridyl; then, preparing a target precursor, namely, 2-(4-(anthracene-10-yl)-6-(pyrazine-2-yl) pyridine-2-yl) pyrazine as a ligand; and finally, synthesizing a complex [Ru (An-di (2-Pz) Py) (Bitpy)]. The complex is inserted into a DNA base pair as an intercalating agent, has very strong interaction with DNA, and provides basic research for researching the interaction mode of the ruthenium (II) polypyridine complex of the tridentate ligand and DNA and taking the ruthenium (II) polypyridine complex as a diagnosis and treatment reagent.

The application discloses a bisoxazoline pyridine functionalized porous organic polymer and preparation and application thereof; firstly, a styryl functionalized PyBox monomer (VPyBox) is designed and synthesized, and VPyBox, styrene and divinylbenzene are subjected to free radical polymerization under initiation of azobisisobutyronitrile in a certain proportion to obtain a series of porous organic polymers (POP-PyBox); the POP-PyBox can be used as a solid N , N , N tridentate ligand for Co-catalyzed hydrosilylation of arylalkynes with diphenylsilane; the heterogeneous catalyst system developed by the application has a catalytic activity comparable to that of a homogeneous catalyst reported in the literature, and the catalyst is easy to separate and recover; the recovered catalyst can be recycled for more than 6 times, which can not only greatly reduce the preparation cost of vinylsilane, but also simplify the post-treatment process and reduce the three wastes, and has a good practical application prospect.

The invention discloses a chiral P, N, N-tridentate ligand based on a ferrocene skeleton as shown in a formula I, a preparation method of an iridium catalyst containing the ligand and application of the ligand in preparation of a carbon-nitrogen axial chiral compound and a diltiazem intermediate. According to the present invention, the chiral P, N, N-tridentate ligand based on the ferrocene skeleton and the metal iridium precursor [Ir (COD) Cl] 2 are subjected to complexation to obtain the complex as the iridium catalyst, and the catalyst can be used as the iridium catalyst with characteristics of high yield (up to 99%), high enantioselectivity (up to gt; 99% ee) and high diastereoselectivity (up to gt; according to the method, N-aryl indolal or N-aryl indolone is subjected to asymmetric hydrogenation by using N-aryl indolal or N-aryl indolone (R1, R2, R3, R4, R5, R6, R7, R7, R8, R9, R9, R9, the catalyst can also be applied to asymmetric synthesis of diltiazem intermediate (2R, 3S)-3-(4-methoxyphenyl)-2, 3-epoxidized propionate, has the advantages of short synthesis route, high yield, good stereoselectivity (as high as 99% ee, 97 / 3dr) and the like, and has better economic and social benefits.

The present invention discloses a dibromo-1,3-bis(1-butylimidazole-3-yl)benzene ligand modified with an nitrogen heteroaromatic ring and a preparation method thereof, an iridium complex and an organic electroluminescent device. The dibromo-1,3-bis(1-butylimidazole-3-yl)benzene ligand modified with an nitrogen heteroaromatic ring has the following structure: wherein R is an nitrogen heteroaromatic ring group or a derivative thereof. The present invention introduces an nitrogen heteroaromatic ring group or a derivative thereof at position 5 of dibromo-1,3-bis(1-butylimidazole-3-yl)benzene to obtain a dibromo-1,3-bis(1-butylimidazole-3-yl)benzene ligand modified with an nitrogen heteroaromatic ring, which can be used as a tridentate ligand of an iridium complex, increases the rigidity of the ligand and the complex, regulates the luminescent color and efficiency of the complex, increases steric hindrance, reduces molecular stacking, thereby suppressing the non-radiative transition process of the molecule and improving the luminous efficiency of an organic electroluminescent device using an iridium complex.

The application belongs to the technical field of polymer material recycling and catalytic chemistry, and discloses a composite catalyst for PET waste bottle alcoholysis and a preparation method thereof. The composite catalyst is based on biomimetic enzyme engineering and dynamic covalent chemistry strategy, and comprises a binuclear metal cluster active center, a limited microenvironment shell layer and a dynamic covalent network skeleton. The binuclear metal cluster is constructed by zinc / cobalt / manganese ions and a tridentate ligand C9H8N2O4, the shell layer is a polydopamine derived functional polymer, and the skeleton is formed by cross-linking aromatic and aliphatic monomers through borate ester bonds. The application solves the performance degradation problem caused by the instability of the active center of the existing enzyme-like catalyst in industrial circulation application. The catalyst not only has the enzyme-like catalytic characteristics of high activity and high selectivity, but also realizes self-repairing after damage through the built-in multiple dynamic chemical mechanism, thereby providing a new catalytic material with performance and durability for efficient and sustainable chemical recycling of PET waste bottles.

The application discloses a kind of big steric hindrance C-C coupling palladium ligand and synthesis method, ligand is used naphthyl as the main group of stable ligand, this group provides big plane rigid configuration during ligand use, simultaneously, it provides big π electron for complex molecule to stabilize complex;In addition, the configuration of pyridofuran is used, the N coordination point of traditional N-P bidentate ligand is introduced O by furan this functional group in ortho position to adjust the chemical environment of intramolecular N coordination point, so as to modify the traditional N-P bidentate ligand to tridentate ligand, this change can effectively increase the penetration ability of Pd active center in actual ligand use to improve catalytic activity.

The present invention provides a degradable polyurethane material, a preparation method thereof, and an application thereof. The present invention belongs to the field of polymer chemistry. The preparation method comprises the following steps: (1) reacting a polyol, a small molecule chain extender, a diisocyanate, and a tridentate ligand to obtain a linear polyurethane; 2) performing a coordination reaction between the linear polyurethane obtained in step (1) and a divalent palladium compound and a monodentate ligand; (3) performing a coordination reaction between an o-phenanthroline ligand and a monovalent copper compound; and (4) mixing the solution obtained in step (3) with a diprimary amine compound and the solution obtained in step (2), removing the solvent, and hot pressing to obtain the degradable polyurethane material. The polyurethane material of the present invention has good tensile strength and toughness and has degradability.

The invention discloses a preparation method and application of a semi-sandwich type iridium complex containing a tridentate ligand. The structural formula of the complex is shown as a formula (I), a ligand and a dimer react under the reaction condition, sodium bicarbonate is continuously added into a reaction system, proton H on coumarin unit carbon in the ligand can be selectively removed, and therefore the semi-sandwich type iridium complex (I) of the CNS tridentate ligand is obtained. Wherein a coordination carbon atom (C, blue) in the tridentate chelate ligand is derived from a coumarin unit, a nitrogen atom (N, red) is derived from a Schiff base structure, a sulfur atom (S, pink) is derived from thiosemicarbazide, the obtained iridium complex shows good anticancer activity, the performance of the iridium complex is close to or even superior to that of commercial cis-platinum, and the iridium complex is a very potential anticancer drug.

The invention relates to the technical field of research and development of tumor photodynamic therapy photosensitizers, photothermal therapy photothermal reagents and sonodynamic therapy sonosensitizers, and provides a preparation method and application of a binuclear metal complex of a polythiophene bridging ligand. The invention relates to a ruthenium complex TBLRu3a-TBLRu6a and a ruthenium complex TBLRu3b-TBLRu6b of a polythiophene bridged tri-bidentate ligand, a ruthenium complex TTLRu1-TTLRu12 of a polythiophene bridged bis-tridentate ligand, and an osmium complex TTLOs1-TTLOs6 of a polythiophene bridged bis-tridentate ligand, which are respectively designed and invented by the invention. The invention further relates to a preparation method of the ruthenium complex TBLRu3a-TBLRu6a and the ruthenium complex TBLRu3b-TBLRu6b of the polythiophene bridged tri-bidentate ligand and a preparation method of the ruthenium complex TTLRu1-TTLRu12 of the polythiophene bridged bis-tridentate ligand. The polythiophene bridged metal complex has extremely high stability and excellent two-photon absorption characteristic, has excellent biotoxicity and photothermal conversion capability under the action of infrared exciting light, and can induce A549R cell apoptosis. The polythiophene bridged metal complex provided by the invention is a potential novel two-photon absorption photodynamic therapy photosensitizer, a photothermal therapy photothermal reagent and a sonodynamic therapy sonosensitizer, and has a wide application prospect in photodynamic therapy, photothermal therapy and sonodynamic therapy of tumors.

The application discloses a synthesis method of a deuterated aryl compound promoted by a tridentate ligand. An aryl compound shown in formula I is subjected to a deuterium substitution reaction with a deuterium source reagent in an organic solvent reaction medium under catalysis of a complex formed by a palladium catalyst and a tridentate ligand, and a silver salt is used as a reaction aid. The reaction product is separated and purified to obtain a deuterated aryl compound shown in formula II. The tridentate ligand has high reactivity in a Pd-catalyzed HIE reaction and can form a stable catalyst.

According to the invention, three [3 + 2 + 1] coordination mode red light iridium (III) complexes are synthesized: Ir (diqzb) (CF3PhCF3py) Cl, Ir (diqzb) (CF3ppy) Cl and Ir (diqzb) (ppy) Cl. A rigid tridentate ligand diqzb is coordinated with bidentate ligands CF3PhCF3py, CF3ppy and ppy, so that the ligand is synthesized. The emission wavelength of the OLED device is 616 to 649 nm, the current efficiency is 8.6 to 25.6 cd.A <-1 >, and the EQE is 21 to 28%. When the EQEmax of Ir (diqzb) (CF3ppy) Cl reaches 28%, the same type of records are refreshed; and the CIE coordinate (0.703, 0.292) of the Ir (diqzb) (ppy) Cl is close to the standard red coordinate of ITU-R BT.2020. The invention discloses a complex structure, synthesis and a device manufacturing method.

An organometallic compound represented by Formula 1:M(L1)n1(L2)n2  Formula 1wherein M is a transition metal, L1 is a ligand represented by Formula 2 as provided herein, n1 is 1, 2, or 3, wherein, when n1 is 2, two L1 groups are identical to or different from each other, and when n1 is 3, two or more of three L1 groups are different from each other, L2 is a monodentate ligand, a bidentate ligand, a tridentate ligand, or a tetradentate ligand, and n2 is 0, 1, 2, 3, or 4, wherein, when n2 is 2 or greater, two or more L2 groups are identical to or different from each other, and L1 and L2 are different from each other.

The invention belongs to the technical field of high polymer material recovery and catalytic chemistry, and discloses a composite catalyst for alcoholysis of a PET waste bottle and a preparation method of the composite catalyst. The composite catalyst is based on bionic enzyme engineering and a dynamic covalent chemical strategy and comprises a binuclear metal cluster active center, a confinement microenvironment shell layer and a dynamic covalent network framework, a binuclear metal cluster is constructed by zinc / cobalt / manganese ions and a tridentate ligand C9H8N2O4, the shell layer is a functional polymer derived from polydopamine, and the dynamic covalent network framework is constructed by zinc / cobalt / manganese ions and a tridentate ligand C9H8N2O4. And the skeleton is formed by cross-linking aromatic and aliphatic monomers with boric acid ester bonds. According to the invention, the problem of performance degradation caused by active center instability of the existing enzyme-like catalyst in industrial cyclic application is solved. The catalyst not only has high-activity and high-selectivity enzyme-like catalytic characteristics, but also realizes self-repair after damage through built-in multiple dynamic chemical mechanisms, and provides a novel catalytic material with both performance and durability for efficient and sustainable chemical recovery of PET waste bottles.

A porous coordination network is represented by the following formulas (I) to (VIII), in which M2+ is a divalent metal ion, M3+ is a trivalent metal ion, L1a and L1b are tridentate ligands having hexaazaphenalenyl, L2a and L2b are bidentate or tridentate ligands containing a carboxy group, L3− is a tertiary ligand ion that is an anion of triazole or a triazole derivative, and Y is a cation.

The invention provides a chiral amino-pyridine-phosphine tridentate ligand, a manganese complex as well as a preparation method and application of the chiral amino-pyridine-phosphine tridentate ligand and the manganese complex. Specifically, the invention relates to a chiral amino-pyridine-phosphine tridentate ligand as shown in a formula I. The ligand can be complexed with high-yield metal to form a metal complex, and the metal complex can be used for catalyzing asymmetric hydrogenation reaction. The metal complex catalyst provided by the invention has high catalytic activity and shows excellent enantioselectivity in an asymmetric hydrogenation reaction.

The invention belongs to the field of organic chemical ligands, and particularly discloses an oxazoline-derived tridentate N, N, N-ligand and a synthesis method and application thereof.Chiral oxazoline and quinoline sulfonamide are used as core frameworks, the tridentate N, N, N-ligand of a novel structure is developed, the ligand is shown in the general formula (I), and the structural formula (I) is shown in the description. The specific compound shown in the general formula (I) is successfully applied to the asymmetric catalytic reaction. The novel chiral ligand has abundant structural characteristics, induces excellent enantioselectivity, and can be widely applied to three-dimensional convergent free radical asymmetric cross-coupling reaction of tertiary halogenated alkane and (hetero) arylamine. The method has important guiding significance for developing a novel catalytic system to solve other types of three-dimensional convergent free radical asymmetric reactions.

The invention discloses a high-performance polymer interpenetrating network and a preparation method thereof. The preparation method comprises the following steps: 1) mixing alkynylated polyethylene glycol, dimethyl ethylenediamine, trimethylolpropane tripropiolate and a monodentate ligand in a first solvent for reaction, adding palladium acetate and the tridentate ligand for coordination reaction after the reaction is finished, and removing the first solvent after the coordination reaction is finished to obtain a polyethylene glycol network; and 2) in the presence or absence of a catalyst, mixing the polyethylene glycol network, polyol, a chain extender, polyisocyanate and a cross-linking agent to react to obtain a polyethylene glycol-polyurethane polymer interpenetrating network, and curing to obtain the high-performance polymer interpenetrating network. According to the invention, the mechanical property and energy absorption capacity of polyurethane and polyethylene glycol can be enhanced, so that the material can bear higher stress level, the toughness of the material is improved, and the maximum extensibility and plastic deformation capacity of the material are improved while the original strength of a polymer is maintained.

Provided is a novel hydrosilylation reaction catalyst using inexpensive and abundant iron, which is suitable for use in the silicone industry. An iron complex compound represented by formula (1): (L) FeAn1 (1) [in the formula, n1 is 2 or 3, A is each independently-OR1,-OC (= O) R2, or-NR3R4; r < 1 >, R < 2 >, R < 3 > and R < 4 > are independently alkyl groups which have substituent groups and have 13 to 24 carbon atoms, or-Si (CH3) 2-[OSi (CH3) 2] m-CH3, and m is an integer of 0 to 11; when two of A are-OR1 and R1 is a hydrocarbon group having 13 to 24 carbon atoms and optionally having a substituent, R1 may be linked to each other to form a cyclic structure-O-C (Ra)-O-, and Ra is a hydrocarbon group having 13 to 24 carbon atoms and optionally having a substituent; l represents a tridentate ligand having a specific structure. ].

The invention discloses a broad-spectrum alkyne metathesis catalyst and a preparation method of a ligand of the broad-spectrum alkyne metathesis catalyst. In an inert gas atmosphere, in the presence of a palladium catalyst and alkali, pinacol borate substituted triphenylmethane and aryl halide are subjected to a heating reaction in a mixed solvent of an organic solvent and water, and the tridentate ligand is obtained. The method comprises the following steps: mixing a tridentate ligand and a molybdenum carbine precursor in an organic solvent, stirring and reacting to obtain a tridentate ligand metal catalyst, then adding a metathesis substrate, and catalyzing alkyne metathesis reaction at 25-110 DEG C. The invention provides a simple, convenient and efficient preparation process, synthesis of various ligands can be realized, and a new technical approach is provided for expansion of a ligand library. The catalyst prepared by using the ligand has high solvent and substrate applicability, overcomes the dependence of a known catalyst system on a high-toxicity solvent carbon tetrachloride, and can realize efficient conversion of a substrate which is generally difficult to carry out alkyne double decomposition reaction.

The invention relates to the technical field of organic synthesis chemistry and asymmetric catalysis, in particular to an amino acid-derived N, N, N-tridentate ligand and a preparation method and application thereof.The ligand has the structure shown in the general formula (I) or comprises an acyl / sulfonyl unit part and an amino acid-derived diamine unit, wherein R1 is selected from substituted or unsubstituted aryl, heteroaryl, alkyl or styryl, and the diamine unit is derived from natural or artificial amino acid. The ligand is wide in source, simple and convenient to synthesize, diverse in structure, low in price and easy to obtain, can be coordinated with a copper catalyst to be used for catalyzing S-functionalization and other asymmetric free radical reactions of sulfenamide, shows excellent catalytic activity and enantioselectivity, has the yield of 80% or above and the enantiomeric excess (ee) value of 90% or above, and is suitable for industrial production. The quinine alkaloid ligand overcomes the defects of single structure, high price and difficulty in modification of the existing quinine alkaloid ligand.

The invention relates to an ionic iridium (III) complex based on (+ 3, + 2, + 1)-[Ir (NCN / NNN) (CN) (R)] < + / 2 + > configuration and a preparation method and application thereof, and the preparation method comprises the following steps: 1, reacting a tridentate ligand NCN / NNN with iridium chloride trihydrate in a specific solvent to obtain a first intermediate; 2, reacting the obtained first intermediate with a bidentate ligand HCN to obtain a second intermediate; and step 3, substituting the second intermediate with a monodentate cyanide ligand R to obtain a target product. The complex is efficient in synthesis method, has good photophysical properties, and has low cytotoxicity and high phototoxicity index for lung cancer cells, colon cancer cells and liver cancer cells, which shows that the complex has good application prospects in the field of metal anti-cancer drugs.

The invention belongs to the technical field of organic synthesis, and discloses an application of a chiral phosphine-nitrogen-nitrogen tridentate ligand in asymmetric allyl substitution reaction, the chiral phosphine-nitrogen-nitrogen tridentate ligand is constructed by taking ferrocene as a skeleton, the ligand has a plurality of chiral factors and has a potential hydrogen bond donor, and the chiral phosphine-nitrogen-nitrogen tridentate ligand has a high chiral selectivity. In an allyl substitution reaction, the compound can form a hydrogen bond with a hydrogen bond acceptor of a substrate. Therefore, the ligand disclosed by the invention has the advantages of high reaction activity, good stereoselectivity, wide substrate range and the like in asymmetric allylic substitution reaction.

This invention discloses a cyclohexyltriamine organic ligand and its synthesis method, belonging to the field of organic chemistry. Using cis,cis-1,3,5-cyclohexyltricarboxylic acid as a starting material, this invention first synthesizes cis,cis-1,3,5-cyclohexyltriamine (TachH3) through a multi-step reaction. Then, using cis,cis-1,3,5-cyclohexyltriamine as a starting material, it synthesizes cyclohexyltriamine organic ligands with structural formulas as shown in Formula I (compounds 5A-5D) and Formula II (compounds 6A-6D). The method of this invention enables large-scale, low-cost preparation of TachH3 and its extended ligands. The cyclohexyltriamine organic ligands provided by this invention are rigid tridentate ligands, which can be widely applied in the basic research and application exploration of organometallic ligands, and have broad application prospects.

The invention provides a chiral glycoside compound and a synthesis method thereof, and belongs to the technical field of metal organic catalysis. The invention provides a chiral glycoside compound and also provides a synthesis method of the chiral glycoside compound, and the synthesis method comprises the following steps: by using a chiral anion catalyst consisting of a chiral NNN tridentate ligand and low-cost and low-toxicity transition metal copper, synthesizing the chiral glycoside compound through an exosphere nucleophilic attack mechanism, thereby obtaining the chiral glycoside compound. The free radical asymmetric oxygen alkylation reaction of the tertiary alkyl halogenated hydrocarbon electrophilic reagent and various glycosides is realized. The synthesis method has the advantages of simple and easily available raw materials, mild reaction conditions, wide substrate universality, good functional group compatibility, high yield, high diastereoselectivity and the like, can realize later structural modification of various glycosides, and has great application prospects and practical values.

The invention provides a pincerlike tridentate cobalt complex containing imidazo [1, 2-alpha] pyridyl as well as a preparation method and application of the pincerlike tridentate cobalt complex, and belongs to the technical field of organic chemical synthesis. The pincerlike tridentate cobalt complex comprises four symmetric structures and three asymmetric structures, and the structural formula is shown in the specification. According to the preparation method, 2, 6-diacetylpyridine is taken as a starting material, and the difference is as follows: a symmetric bis-imidazo [1, 2-alpha] pyridyl pincerlike tridentate ligand is constructed by bromination and cyclization reaction on two sides of a symmetric complex; one side of the asymmetric complex is brominated and cyclized to form an imidazo [1, 2-alpha] pyridine structure, and acetyl on the other side of the asymmetric complex is subjected to condensation reaction with amino, so that the asymmetric pincerlike tridentate ligand is obtained. The two ligands respectively react with anhydrous cobalt chloride to successfully prepare seven target cobalt complexes. In catalytic performance research, some cobalt complexes show certain catalytic activity in styrene hydrosilylation reaction, and show good application potential.