48 results about "Metalloorganic Compounds" patented technology

The invention discloses a high-efficiency catalyst and a preparation and application method thereof, and relates to the technical field of nano carbon material preparation, the high-efficiency catalyst comprises the following components: an organic metal compound containing iron, cobalt and nickel, a refractory metal organic compound, a cocatalyst and a functional auxiliary agent, the catalyst is used for preparing the carbon nanotube by a floating chemical vapor deposition method, a high-temperature plasma CVD method or a plasma arc method, all components of the catalyst are uniformly mixed through melting granulation, the defect that the proportion is difficult to accurately control due to independent feeding is avoided, meanwhile, powder feeding can be cracked and evaporated in the subsequent carbon nanotube preparation process, and the carbon nanotube preparation efficiency is improved. The catalyst with higher concentration is obtained, and the preparation efficiency of the single-walled carbon nanotube is remarkably improved.

This invention relates to the technical field of organometallic compound production, and discloses a method and apparatus for synthesizing a homogeneous organic molybdenum-containing compound and its application. The method is implemented in a system containing a first reaction unit and a second reaction unit. The first reaction unit comprises at least two batch reactors connected in series. The batch reactors are cylindrical structures containing an inner cylinder and an outer cylinder. The inner cylinder and the outer cylinder are kept in communication so that the material in the inner cylinder can overflow into the outer cylinder. The method includes: introducing a molybdenum-containing material and an organic ligand material into reaction unit 1 for a first reaction to obtain gas phase I and liquid phase I; introducing the organic ligand material and the liquid phase I into the second reaction unit for a second reaction to obtain gas phase II and the homogeneous organic molybdenum-containing compound. The method provided by this invention features high reaction mass transfer efficiency and high conversion rate.

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

The application provides a circuit board high-density protective film surface treatment method and a circuit board. The circuit board high-density protective film surface treatment method comprises the following steps: obtaining a circuit board; placing the circuit board into a modified OSP solution for soaking, wherein the modified OSP solution comprises an alkyl amide benzimidazole composition, a transition metal salt, an organic acid solvent, a chelating agent and water; using a cooling circulation spraying device to spray the soaked circuit board; and drying the sprayed circuit board to obtain the circuit board. By the method, the heat resistance of a traditional organic compound film is improved, the stability of the metal-organic compound film itself is improved, a high-density metal-organic compound film is obtained to improve the protection of the copper surface, the wastewater discharge amount is reduced, energy saving and emission reduction are achieved, and the water recycling rate is improved.

In one example, an organic light-emitting diode contains an emission material layer comprising a metal-organic compound and various types of host materials. Furthermore, a display device using organic light-emitting diodes is discussed.

The Invention relates to a method Method for making a ruthenium catalyst comprising the steps of - Providing an aromatic dithiol substituted on adjacent aromatic carbon atoms with thiol groups, wherein in a first step an aromatic compound substituted with two leaving groups on adjacent aromatic carbon atoms are reacted with alkali trithiocarbonate to obtain an aromatic benzodithiole-thione, which in a subsequent step is reacted / hydrolysed with a base; - providing a zinc dithiolate compound by reacting the aromatic dithiol with a zinc carboxylate in an organic solvent; Reacting the zinc dithiolate compound with a ruthenium compound wherein X1 and X2 are, independently of each other, are anionic ligands and are the same or different; L and L2 are, independently of each other, neutral electron donor ligands and are the same or different; Ar is an aromatic group which may be substituted and that can be bridged with L, if L is an alkoxy group; - Obtaining a ruthenium catalyst of formula 4 or 4a, wherein R1 to R4 are, independently of each other, are selected from hydrogen, halogen, alkyl, aryl, or R.1 with R3, R3 with R4 or R2 with R4 are forming together an aliphatic or aromatic ring.

The application discloses a synthesis method of a foamed nickel loaded iron-nickel-phosphorus C3N4 electrocatalytic material, and specifically comprises the following steps: S1, potassium ferricyanide, citric acid and C3N4 are weighed respectively and added into deionized water, and magnetic stirring is performed through a magnetic stirrer until complete dissolution; S2, 2cm*2cm foamed nickel is cut, surface impurities are washed away, and the treated foamed nickel is dried in a vacuum oven at 70 DEG C for 6h, and the dried foamed nickel is placed in the solution prepared in S1, and the reactor is sealed; S3, the foamed nickel in S2 is dried in a vacuum oven at 70 DEG C for 12h, is placed in the upstream of a porcelain boat, 450mg-550mg sodium hypophosphite is weighed and placed in the downstream of the porcelain boat, the porcelain boat is placed in the middle position of a tube furnace, and the foamed nickel is subjected to phosphating reaction in an argon atmosphere, the reaction temperature is controlled to be 345-355 DEG C, the reaction time is controlled to be 115-125min, and the foamed nickel loaded iron-nickel-phosphorus / C3N4 electrocatalytic material is obtained after the reaction is completed. The foamed nickel surface participates in the formation of a metal organic compound, so that the performance of the material is improved, and the service life of the material is prolonged.

The invention belongs to the technical field of semiconductor photoelectric device manufacturing, and particularly relates to an epitaxial growth method of a P-type Bragg reflection layer, a vertical cavity surface emitting laser and an epitaxial growth method of the vertical cavity surface emitting laser. The P-type Bragg reflection layer provided by the invention is grown by adopting a metal organic compound chemical vapor deposition-in-situ reflection monitoring method, and comprises multiple layers of unit structures which are arranged in a laminated manner, each layer of unit structure sequentially comprises a carbon-doped GaAs layer, a first carbon-doped AlGaAs layer, a delta-doped layer and a second carbon-doped AlGaAs layer from bottom to top, the delta-doped layer is located at an optical standing wave node, and the second carbon-doped AlGaAs layer is located at an optical standing wave node. And the delta-doped layer is a third carbon-doped AlGaAs layer. According to the P-type Bragg reflection layer provided by the invention, the resistance of a P-DBR device can be remarkably reduced while high reflectivity is maintained, and the optimal balance of photoelectric properties is achieved through accurate control of a doping position.

The invention relates to the technical field of metal material processing, in particular to a vacuum passivation treatment device and method for low-oxygen niobium powder, and aims to solve the problems that the oxygen control precision of an existing low-oxygen niobium powder passivation process is low, the oxygen content increase rate exceeds the standard due to the fact that the protective layer binding force is weak, and matching devices are insufficient in synergism. The method comprises the following steps: pre-filling low-oxygen niobium powder in an inert atmosphere, carrying out high-vacuum heating to T1 (150-250 DEG C), degassing and activating, introducing metal organic compound vapor to form an alloy transition layer, carrying out pulse oxygen introduction-rapid vacuumizing to realize dynamic micro-oxidation circulation, heating to T2 (300-450 DEG C), and alternately introducing nitriding / carbonizing / silicifying gas to form a nano laminated layer, and cooling and discharging under a protective atmosphere (optional fluorine-containing gas surface modification). The surface of the prepared niobium powder is of an alloy transition layer-initial oxide layer-nanometer lamination composite structure, and the oxygen content increase range is smaller than 200 ppm after the niobium powder is exposed for 120 hours in the environment with the temperature being 40 DEG C and the relative humidity being 75%. The matching device comprises a vacuum reaction chamber, a branch gas source subsystem (inertia / oxygen / nitridation, metal organic and carbonization / silicification), a gas alternating control module and a central control system, can automatically and synergistically complete the whole process, overcomes the defects in the prior art, and is suitable for industrial production.

The invention discloses a preparation method and application of a catalytic char-forming magnesium borate whisker flame retardant and a thermosetting flame-retardant polymer of the catalytic char-forming magnesium borate whisker flame retardant, the special structure of the flame retardant is that a functional layer with atomic-scale catalytic char-forming flame-retardant capability is constructed on the surface of magnesium borate, and the preparation process comprises the following steps: S1, activating and modifying the surface of a magnesium borate whisker; s2, complexing the modified magnesium borate whiskers with metal ions; s3, loading the magnesium borate whisker with a complex structure containing a metal organic compound; the key point of the invention is that a host-guest structure with atomic-scale catalytic char forming ability is loaded on the surface of the magnesium borate whisker by using chemical bonds, so that the magnesium borate whisker polymer composite material is endowed with excellent char forming ability and flame retardant property. The magnesium borate whisker flame retardant capable of catalyzing charring can be applied to the field of flame retardance of thermosetting polymers, the adding amount is 2-4 wt%, the charring capacity of a thermosetting polymer composite material is remarkably improved, the UL-94 grade reaches the V-0 grade, and the limit oxygen index is increased to 30-34%.

This invention relates to the field of catalyst technology for the hydrogenation of carbon dioxide to methanol, and discloses a modified metal-organic framework material and its preparation method and application. The method includes: (1) reacting a first inorganic metal compound, an aromatic organic acid, an organic acid, and a first organic solvent, followed by solid-liquid separation to obtain product I; (2) mixing product I, a second organic solvent, and a second inorganic metal compound, followed by solid-liquid separation to obtain product II; (3) mixing product II, a second organic solvent, and a metal-organic compound, followed by solid-liquid separation to obtain product III; (4) reacting product III, a Lewis acid compound, a second organic solvent, and a modifier; wherein the first inorganic metal compound and the second inorganic metal compound are different, the aromatic organic acid and the organic acid are different, and the modifier is selected from at least one of haloalkanes, alcohols, and alkenes. The material prepared by this method exhibits a methanol selectivity greater than 95% and a CO2 conversion rate greater than 25%.

The invention relates to the technical field of semiconductor material preparation, in particular to a preparation method of a niobium-containing metal organic compound. The method comprises the following steps: S1, adding an n-butyllithium solution into a reactor, cooling, then adding tert-butylamine, heating to room temperature, and stirring for reaction to obtain a first intermediate solution; s2, cooling the first intermediate solution, then adding niobium pentachloride, heating to room temperature, and stirring for reaction to obtain a second intermediate solution; s3, cooling the second intermediate solution, introducing HNR1R2, and stirring for reaction to obtain a product mixed solution; and S4, sequentially carrying out solid-liquid separation and reduced pressure distillation on the product mixed solution to obtain the niobium-containing metal organic compound. The method is simple in step and short in reaction time, meanwhile, non-toxic alkane n-hexane is used, harm to the human body and the environment is reduced, n-hexane can be repeatedly used, no waste is generated, and the method is suitable for industrial large-scale production.

This disclosure relates to methods and components for a cyclic deposition process for depositing Group IV to Group VI transition metals on a substrate. The method includes providing a substrate in a reactor chamber, introducing a gaseous organometallic compound as a metal precursor and a gaseous Lewis acid reactant to react with the metal precursor, thereby forming a transition metal material on the substrate. The method may include introducing a gaseous co-reactant. This disclosure also relates to semiconductor processing components for performing the methods according to this disclosure.

The invention provides a high-voltage lithium cobalt oxide positive electrode material, a preparation method, a positive plate and a lithium ion battery. The preparation method comprises the following steps: mixing a cobalt source, a lithium source and an additive, and performing solid-phase sintering to prepare the high-voltage lithium cobalt oxide positive electrode material, the additive comprises a transition metal organic compound. In the preparation process of the high-voltage lithium cobalt oxide positive electrode material, the transition metal organic compound is added as an additive, so that the convective reaction effect of the raw material powder in the solid-phase sintering process is enhanced, and the phenomenon that residual lithium carbonate is randomly retained due to insufficient reaction of the raw materials is avoided; the problem that residual lithium in a local area of the surface of the prepared high-voltage lithium cobalt oxide positive electrode material is enriched to cause black spots is solved, and the uniformity and the electrochemical performance of the high-voltage lithium cobalt oxide positive electrode material are effectively improved.

The application discloses a kind of metal organic compound energy prediction methods based on deep learning, belong to compound property prediction technical field.It includes the following steps: obtaining the molecular structure information of metal organic compound and calculating electronic structure characteristics, constructs molecular graph and encodes generation geometry feature vector;Global fusion features are output through multimodal feature fusion model;Total energy value and molecular structure are predicted through multi-task prediction network;The mean and variance of the total energy value are obtained by statistical prediction, and the energy prediction value and confidence interval are obtained.The application constructs molecular graph and extracts geometric features, and simultaneously utilizes cross attention and gate fusion network to realize the deep interactive fusion of geometric and electronic structure features, solving the problem of inaccurate feature representation of metal organic compounds and poor multimodal feature fusion effect of traditional methods.

The invention discloses a method for preparing an iron-nickel loaded nanotube carbon material through plasma heating vapor deposition. According to the method, an iron-nickel bimetal organic compound is used as a precursor, and controllable growth of the nanotube is realized under the low-temperature condition of 300-600 DEG C through plasma-assisted chemical vapor deposition. The method specifically comprises the steps that a precursor solution with the iron-nickel molar ratio being 1: 1-1: 3 is prepared, after a substrate is cleaned through plasma, vapor deposition is carried out in the CH4 / H2 / Ar atmosphere, meanwhile, NH3 / N2 is introduced to achieve in-situ nitrogen doping, and finally annealing treatment is carried out at the temperature of 500-800 DEG C. The obtained material has the pipe diameter of 5-20 nm and the length of 1-10 [mu] m, iron-nickel nanoparticles (3-10 nm) are uniformly dispersed, the nitrogen doping amount is 5-10 at% (pyridine nitrogen accounts for 50-70%), and the specific surface area is 500-1200 m < 2 > / g. The method breaks through the limitation of a traditional high-temperature process, and the prepared material shows excellent performance.

The invention relates to a method for producing a MOF, wherein a MOF is a structured metal-organic compound comprising a bi- or tri-dimensional porous network consisting of inorganic entities that are connected by polydentate chelating ligands bonded to multiple metal centers; the polydentate chelating ligands being selected in particular from the group comprising C5-C24 heteroaromatic ligands and aromatic ligands, comprising at least one carboxylic acid function, preferably benzyl or naphthyl di-, tri- or tetracarboxylate, and the aromatic or heteroaromatic ligands optionally bearing, on at least one aromatic ring, a group selected from among —NH2, —OH, —CH3, —NO2, —CF3, —COOH, —SO3H, —SH, —OCH3.

The application discloses a preparation method of tetra (dimethylamine) hafnium and belongs to the technical field of group IVB metal organic compound preparation. The preparation method comprises the following steps: S1, once rectification of tetra (dimethylamine) hafnium crude product, and collection of the first main distillate; S2, dissolution of the first main distillate, and recrystallization to obtain crystals; S3, dissolution of the crystals for secondary rectification, and collection of the second main distillate. The tetra (dimethylamine) hafnium crude product is derived from waste liquid in a production process of cyclopentadienyl tris (dimethylamine) hafnium, and the crude product contains ≤8.0 ppm of Fe and ≤1.0 ppm of Ti; the application realizes 6N level (more than 99.9999%) ultra-high purity recovery of TDMAHf product in CpHf synthesis waste liquid by optimizing key parameters such as rectification and recrystallization parameters, the recovered product fully meets the strict requirements of high-end fields such as semiconductor thin film deposition on metal precursors, the preparation method has the advantages of short process cycle, high processing efficiency and no introduction of other impurities, and can realize industrial application.

This invention discloses the application of a non-metallic organic compound in the catalytic synthesis of polyester, the polyester itself, and its preparation method. The non-metallic organic compound acts as a polycondensation catalyst and copolymer monomer, catalyzing its own polycondensation reaction with polyester esters (such as BHET). The non-metallic organic compound is a hydroxyl-containing benzimidazole derivative. It is obtained by esterification or transesterification of a benzimidazole compound with a diol, followed by neutralization and purification of the esterified solution. This compound can replace traditional metal-based polycondensation catalysts, catalyzing its own melt polycondensation with polyester raw material monomers to prepare a metal-catalyst-free copolyester, avoiding the adverse effects of residual metal catalysts.

The present application belongs to the technical field of water electrolysis catalytic materials, and particularly relates to a cobalt oxide-graphene aerogel self-supporting material loaded with iridium monatomic atoms, a preparation method and application thereof. The preparation method provided by the present application utilizes a solvothermal reaction of a soluble cobalt salt and glycerol to form a metal organic compound with multiple glycerol coordination to create an oxygen-rich environment, then iridium metal ions are added to soak into the interlayer of the metal organic compound, and then graphene is added to form an aerogel precursor which is calcined, thereby anchoring nanometer monatomic iridium at defect vacancies of a metal oxide carrier in the process of in-situ formation of metal defects to form a lattice-confined monatomic iridium electrocatalyst material. The above method of the present application can realize single-atom-level dispersion of Ir, and the metal defects well anchor the Ir monatomic atoms, and the graphene aerogel forms a solid three-dimensional porous network, thereby synergistically improving the electrocatalytic activity and catalytic stability, and being suitable for oxygen reduction catalyst preparation and application.

This invention relates to the field of organometallic compound production technology, specifically disclosing a method and apparatus for synthesizing a homogeneous organic molybdenum-containing compound, its application, and a tower reactor. The method includes: (1) introducing a molybdenum-containing stream and an organic ligand stream I into a first reaction unit to carry out a first reaction, obtaining a gas phase I and a liquid phase stream I; (2) introducing the liquid phase stream I and the organic ligand stream II from the upper middle and lower parts of the tower reactor, respectively, into the tower reactor in a second reaction unit to carry out a second reaction, obtaining a gas phase II and a liquid phase stream II as the homogeneous organic molybdenum-containing compound. The method of this invention is simple in process, flexible in operation, and has low energy consumption, and can overcome the scale-up effect of complex reaction systems.

The application discloses an organic detection method of a metal organic compound, and comprises the following steps: dissolving a sample to be detected in a deuterated solvent to obtain a solution to be detected; gradually reducing the temperature of the solution to be detected from a starting temperature to a final temperature, collecting the sample to be detected at different temperatures 1 H-NMR spectrum; comparing H-NMR spectra at different temperatures 1 H-NMR spectrum, and if an impurity peak originally overlapping with a main peak appears, the sample to be detected contains the impurity. The application separates the nuclear magnetic resonance signal peaks overlapping at normal temperature by gradient reduction of the temperature, realizes qualitative and quantitative analysis of trace impurities, and solves the problem of insufficient detection sensitivity of trace impurities in the prior art.

The invention relates to the technical field of polymer and nano particle compounding, and discloses a nano-silica-added enhanced PVB (polyvinyl butyral) composite material which comprises polyvinyl butyral resin, a plasticizer, epoxy vegetable oil, a titanium source, alcohol amine, a boron source and hydrophilic nano-silica. According to the preparation method, active precursor slurry is prepared through liquid phase component pre-coordination, micro pre-dispersion is achieved through solid-liquid infiltration curing, and finally in-situ surface modification and forming are completed through vacuum-assisted reactive extrusion. The reaction activity of the metal organic compound is regulated and controlled through competitive coordination of alkylol amine, a titanium-boron heteronuclear double-dynamic network is constructed at an interface, and the problems that hydrophilic nanoparticles are difficult to disperse in a hydrophobic matrix and are prone to gelation in the processing process are effectively solved. The obtained composite material has excellent optical transparency, high storage modulus and impact toughness, and is suitable for high-performance safety glass intermediate films.

The application discloses a composite material and a preparation method and application thereof. The composite material is composed of a porous carbon material as a carrier and a metal organic compound as a precursor; wherein oxygen groups of the porous carbon material are connected with metal centers of the metal organic compound through coordination bonds. The composite material is prepared by using a heating reflux method, and the composite material of graphene oxide loaded MOFs with high water stability is prepared by taking graphene oxide as a functionalized carrier. After adding a small amount of GO, the composite material shows smaller aggregated particles compared with MOFs, which is attributed to the coordination between oxygen groups in graphene oxide layers and metal centers in MOFs, so as to prevent the aggregation of MOFs microcrystals and increase the dispersity of the microcrystals, more adsorption active sites can be provided to increase the adsorption performance, and the composite material can be used for efficient capture of CO2.

The application discloses a high-light-efficiency GaN-based white light epitaxial structure and a preparation method thereof. The GaN-based white light epitaxial structure comprises, from bottom to top, a CPSS substrate, an AlN layer, a buffer layer, a UGaN layer, an NGaN layer, a multi-quantum well active region layer and a PGaN layer. The buffer layer comprises a buffer 1 layer and a buffer 2 layer. The preparation method comprises the following steps: selecting a SiO2 composite substrate as the CPSS substrate, forming an epitaxial structure on the CPSS substrate by adopting a metal organic compound chemical vapor deposition method, and growing the AlN layer, the buffer 1 layer, the buffer 2 layer, the UGaN layer, the NGaN layer, the multi-quantum well active region layer and the PGaN layer on the epitaxial structure from bottom to top. The traditional buffer layer is divided into two segments, two segments of ultra-thin buffer 1 layer and buffer 2 layer are formed, the mismatch stress generated by the lattice mismatch between the GaN thin film and the substrate and the thermal stress generated by the thermal expansion coefficient are released, the lattice mismatch of the LED chip is effectively reduced, and the light extraction efficiency is improved.

This invention discloses a controllable preparation method for core-shell structured silver sulfide-iron carbide heterostructures using a seed-growth chemical liquid-phase method. Silver sulfide quantum dots, an organometallic compound of iron, and ammonium bromide salt are dissolved in a high-boiling-point organic solvent and subjected to a high-temperature carbonization reaction. The core-shell structured silver sulfide-iron carbide heterostructure is then precipitated via a polar organic liquid. This material exhibits ferromagnetism with a high maximum magnetic saturation intensity. Simultaneously, these heterostructured nanoparticles exhibit excellent near-infrared II luminescence properties. This invention prepares high-quality silver sulfide-iron carbide heterostructured nanoparticles using silver sulfide quantum dots, an organometallic compound of iron as a precursor, and an ammonium chloride salt. Water-soluble silver sulfide-iron carbide heterostructured nanoparticles are obtained through water-soluble modification with distearate phosphatidylethanolamine-polyethylene glycol. These nanoparticles have potential applications in optics, biomedicine, environmental science, materials science, catalysis, energy, and magnetic storage. The preparation method is simple and easy to implement, suitable for industrial production.

The Invention relates to a method Method for making a ruthenium catalyst comprising the steps of - Providing an aromatic dithiol substituted on adjacent aromatic carbon atoms with thiol groups, wherein in a first step an aromatic compound substituted with two leaving groups on adjacent aromatic carbon atoms are reacted with alkali trithiocarbonate to obtain an aromatic benzodithiole-thione, which in a subsequent step is reacted / hydrolysed with a base; - providing a zinc dithiolate compound by reacting the aromatic dithiol with a zinc carboxylate in an organic solvent; Reacting the zinc dithiolate compound with a ruthenium compound wherein X1 and X2 are, independently of each other, are anionic ligands and are the same or different; L and L2 are, independently of each other, neutral electron donor ligands and are the same or different; Ar is an aromatic group which may be substituted and that can be bridged with L, if L is an alkoxy group; - Obtaining a ruthenium catalyst of formula 4 or 4a, wherein R1 to R4 are, independently of each other, are selected from hydrogen, halogen, alkyl, aryl, or R.1 with R3, R3 with R4 or R2 with R4 are forming together an aliphatic or aromatic ring.

Forming an oxide superconducting film includes a step of laminating a superconducting layer of an oxide superconducting material. The step of laminating the superconducting layer includes a pyrolyzed film forming step, a polycrystallization step, and a sintering heat treatment step. The pyrolyzed film forming step includes a coating film forming step and a pyrolyzing heat treatment step. In the coating film forming step, a solution of a metal organic compound is applied to form a coating film. In the pyrolyzing heat treatment step, the coating film is heat-treated to thermally decompose an organic component of the metal organic compound so as to form a pyrolyzed film. In the polycrystallization step, the pyrolyzed film is heat-treated to form a polycrystal layer containing polycrystals of the oxide superconducting material. In the sintering heat treatment step, the polycrystal layer is heat-treated to orient the polycrystals so as to form the superconducting layer.

This invention relates to a method for preparing bis(pentamethylcyclopentadienyl)ruthenium(II), belonging to the field of noble metal organometallic compound synthesis technology. The method involves de-airing a solvent and pentamethylcyclopentadiene to obtain a pretreated solvent and pretreated pentamethylcyclopentadiene, respectively. Under a protective atmosphere, ruthenium chloride is dissolved in the pretreated solvent to obtain a ruthenium solution. A reducing agent and pentamethylcyclopentadiene are added sequentially to the ruthenium solution, and the mixture is heated uniformly to 50-90°C and stirred for 4-10 hours. After cooling and crystallization, the solid and liquid are separated. The solid is washed sequentially with deionized water and methanol, and dried to obtain crude bis(pentamethylcyclopentadienyl)ruthenium(II). The crude bis(pentamethylcyclopentadienyl)ruthenium(II) is dissolved in hot anhydrous ethanol, filtered to remove impurities, and the filtrate is cooled and crystallized. After solid-liquid separation, the solid is dried to obtain high-purity bis(pentamethylcyclopentadienyl)ruthenium(II). This invention has a simple method, a product yield greater than 74%, and a purity of over 98%.

The invention relates to Organic light emitting diode comprising at least one emission layer, an electron injection layer and at least one cathode electrode, wherein:the electron injection layer comprises an organic phosphine compound, wherein the electron injection layer is free of a metal, metal salt, metal complex and metal organic compound;the cathode electrode comprises at least a first cathode electrode layer, whereinthe first cathode electrode layer comprises a first zero-valent metal selected from the group comprising alkali metal, alkaline earth metal, rare earth metal and / or a group 3 transition metal; andthe electron injection layer is arranged in direct contact to the first cathode electrode layer.