172 results about "Bridging ligand" patented technology

Atomic layer deposition (ALD) type processes for producing metal containing thin films comprise feeding into a reaction space vapor phase pulses of metal containing cyclopentadienyl precursors as a metal source material. In preferred embodiments the metal containing cyclopentadienyl reactant comprises a metal atom that is not directly bonded to an oxygen or halide atom. In other embodiments the metal atom is bonded to a cyclopentadienyl compound and separately bonded to at least one ligand via a nitrogen atom. In still other embodiments the metal containing cyclopentadienyl compound comprises a nitrogen-bridged ligand.

A method of using a metal complex as an n-dopant for doping an organic semiconducting matrix material in order to alter the latter's electrical characteristics is provided. In order to provide n-doped organic semiconductors with matrix materials having a low reduction potential, while achieving high conductivities, the n-dopant is a neutral electron-rich metal complex with a neutral or charged transition metal atom as a central atom and having at least 16 valence electrons. The complex can be polynuclear and can possess at least one metal-metal bond. At least one ligand can form a π complex with the central atom, which can be a bridge ligand, or it can contain at least one carbanion-carbon atom or a divalent atom. Methods for providing the novel n-dopants are provided.

A movel bridging ligand and its metallic match for the catalytic polymerization of olefin are disclosed. Said metallic match as the precursor of catalyst can be used in conjunction with cocatalyst for higher catalytic activity. The resultant resin has wide or dual-peak distribution of molecular weights.

A novel binuclear metal complex according to the present invention is an asymmetric binuclear metal complex represented by the general formula: (L¹)₂M¹(BL)M²(L²)₂(X)_n, wherein M¹ and M², which may be identical or different, represent a transition metal; L¹ and L², which are different, represent a chelate ligand capable of polydentate coordination and two L¹s may be different and two L²s may be different; BL represents a bridge ligand having at least two heteroatom-containing cyclic structures, the heteroatoms contained in the cyclic structures being ligand atoms coordinating to M¹ and M²; X represents a counter ion; and n is the number of counter ions needed to neutralize the charge of the complex. And the binuclear metal complex is useful as a metal complex dye.

The invention discloses high-temperature hyper-salinity water-base fracturing fluid consisting of thickening liquid, a cross-linking agent and a gel breaker, wherein the thickening liquid comprises the following components in percentage by weight: 0.4-0.7% of a thickening agent, 0.1-0.8% of a cleanup additive, 0.01-0.1% of a sterilizing agent, 0.1-0.3% of a temperature stabilizing agent, and the balance of hyper-salinity seawater or stratum produced water; the thickening agent is sulfonyl hydroxypropyl guar gum, sulfonyl betaine amphoteric guar gum or sulfonyl carboxymethyl guar gum; the cross-linking agent is a stable complex formed from reaction of 9-18% of a zirconium compound, 3-40% of a boron compound, 9-18% of a chelating ligand and 5-19% of a bridging ligand by mass; the gel breaker is either ammonium persulfate or sodium persulfate. The fracturing fluid is directly prepared from hyper-salinity water and realizes effective utilization of seawater and hyper-salinity produced water from land, and is applicable to seaborne and terrestrial high-temperature oil-gas wells.

The invention relates to a method for detecting phosphate ions based on a dual-emission europium metal organic framework material. The dual-emission lanthanide europium metal organic framework material is used as a ratio-type fluorescence probe for being applied to high-selectivity high-sensibility detection of the phosphate ions. The chemical general formula of the adopted dual-emission lanthanide europium metal organic framework material is [Eu2(L)2(H20)2(DMF)2], wherein a Eu2O2 cluster is used as an inorganic node, a rigid asymmetric tricarboxylic acid ligand terphenyl-3,4'',5-tricarboxylicacid (H3L) is used as an organic bridging ligand, and preparation is successfully conducted by means of a simple and convenient one-pot solvothermal technology. The invention further discloses application of the metal organic framework material in the aspect of selectively detecting phosphate anions. In a detecting process, along with increase of the content of the added phosphate anions, obviouscolor change from pink to purple which is easily observed with naked eyes is presented under radiation of an ultraviolet lamp, and thus the detecting process becomes more convenient and practical.

The invention provides a preparation method of a ferromagnetic nanoparticle supported rhodium complex hydroformylation catalyst. The method comprises the following step: bonding a rhodium complex to the surface of the superparamagnetic Fe3O4 nanoparticles by a bridging ligand to obtain the ferromagnetic nanoparticle supported rhodium complex hydroformylation catalyst. The invention provides a catalyst prepared by the method and application of the catalyst in hydroformylation reaction. According to the SPION-Rh catalyst, the nanoparticles with huge surface area are combined with rhodium to construct the nano catalytic cluster, thereby being beneficial to enhancing the catalytic efficiency. The catalyst has favorable activity in hydroformylation reaction. After introducing the magnetic particles, the metal rhodium can be simply recovered by applying an external magnetic field, thereby easily solving the problem of difficulty in recovery of rhodium in the homogeneous catalysis in industry.

The invention discloses a cross-linking agent applicable to highly-mineralized water fracturing fluid. The cross-linking agent is stable complex which is formed by reaction of a zirconium compound, a boron compound with a chelating ligand and bridging ligand in aqueous liquor. The zirconium compound is zirconium acetate or zirconium oxychloride with content of 9wt%-18wt%; the boron compound is boric acid or borax with content of 3wt%-40wt%; the chelating ligand is N, N-di(2-hydroxyl ethyl) glycine with content of 9wt%-18wt%; the bridging ligand is one, two or a mixture of more than two of glycerol, mannitol, sorbitol and triethanolamine, with content of 5wt%-19wt%, and the balance of water. The cross-linking agent disclosed by the invention can be cross-linked with a thickening agent under a weakly alkaline condition, not only contains heavy metal zirconium, but also contains boron, so that damages to stratums by the fracturing fluid are effectively lowered; moreover, highly-mineralized water can be adopted to directly prepare the fracturing fluid, so that fresh water resources are saved, and expenditure cost of oilfield enterprises in treating and producing highly-mineralized water is reduced.

The present invention discloses a new type of organic antimony compound bearing a nitrogen-bridged ligand. The structural formula of the ligand is [PhCH2]N[R][CH2Ph], wherein R is a substituent on nitrogen atom; group X that directly links antimony is an anion with strong charge pulling ability; and in this antimony compound, Sb<3+> not only forms bonds with the two carbon atoms of the ligand but also forms a coordinate bond with the nitrogen atom of the ligand and an ionic bond with the corresponding anion. The present invention also provides the preparation method of this organic antimony compound, as well as its application in organic synthesis as a catalyst.

The invention discloses a method for producing hydrogen peroxide by electrocatalytic reduction of oxygen, wherein the method comprises the following steps: (1) an electrocatalytic thin film with a single-layer thickness is prepared, wherein the electrocatalytic thin film is composed of a first organic bridging ligand and a metal organic single layer formed by metal clusters connected with the first organic bridging ligand, or composed of a second organic bridging ligand containing hydroxyl groups and a metal organic single layer composed of first metal ions connected with the second organic bridging ligand; and (2) oxygen is catalyzed to be reduced into hydrogen peroxide by the electrocatalytic thin film. The ultra-thin two-dimensional metal organic single-layer material electrocatalytic thin film is synthesized by the chemical method, has the characteristics of large specific surface area, fast diffusion rate and the like, thereby facilitating the electrocatalytic oxygen reduction process; hydrogen peroxide can be produced with high efficiency and high selectivity, and hydrogen peroxide with the highest selectivity of 80% can be produced in the process of oxygen reduction.

The invention provides a novel quadridentate bridging ligand, an iridium complex thereof, and a bimetallic complex of iridium and rare-earth ions. The quadridentate bridging ligand is a bipyridine derivative containing beta-diketone, the bimetallic complex has a structure of formula (III), wherein, RE is rare-earth element; L1, L2 are cyclic metal ligands combined with Ir; D1, D2 and D3 are anion ligands; X, Y are C or nitrogen atom; m, n is the number of the atom, m+n=0, 1 or 2; R1, R2, R3 are hydrogen atom, halogen atom, nitryl, amido, alkyl, alkenal, alkynyl, alkoxy, aryl or heterocyclic aryl, R4 is alkyl, halogen-substituted alkyl, aryl or heterocyclic aryl. The iridium-rare-earth bimetallic complex is luminescent through the iridium complex sensitizing rare-earth ions, has an important characteristic excited by visible light, thereby the iridium-rare-earth bimetallic complex has wide application as new luminescence material.

The invention relates to a preparation method of an organic hybrid trinuclear platinum complex possessing a Y type structure synthesized by supermolecules self-assembly as well as treatment for gastric adenocarcinoma cells. The MTT experiment data shows that the compound can cross a drug resistance mechanism of cisplatin, and can specifically target to the gastric adenocarcinoma cells. A platinum ligand Pt(NH3)2Cl(NO3)] in which the chloride ion is replaced by nitrate and a bridge ligand (2,4,6-tri(pyridin-4-yl)-1,3,5-triazine) are subjected to self-assembly, thereby the novel and latent medicine for treating gastric adenocarcinoma with excellent anticancer activity and tumor targeting is obtained. Because the complex enables specific recognition of the gastric adenocarcinoma cells, and can induce the G-rich sequence of the oncogene to form a G-quadruplex structure, the activity of telomerase can be inhibited, thereby the complex possesses high gastric adenocarcinoma resistance activity. The preparation method has the advantages of simple process and low cost, can be completed in a general chemical laboratory, and the production process is environmentally-friendly. The trinuclear platinum complex possessing Y type structure can be taken as the novel and latent gastric adenocarcinoma resistance medicine.

The invention belongs to a chemical synthesis method and in particular relates to a preparation method of a polyacid-like late transition metal-organic network catalyst material. The polyacid-like late transition metal-organic network catalyst material has a (3,4,24)-connecting topological polyacid-like salt-organic compound structure, is a crystalline catalyst which is obtained by converting a late transition metal salt and an organic bridging ligand into a metal organic network under appropriate pH and temperature, and has a chemical component of [M16(HPO3)4]L3, wherein L is the organic bridging ligand, and M contains Zn, Cd, Cu, Co, Ni and the like. The polyacid-like late transition metal-organic network catalyst is a late transition metal oxygen cluster and breaks through the traditional polyacid limit; and as late transition metal ions are introduced into the catalyst, the stability, selectivity and catalytic activity of the catalyst can be effectively improved.

The invention discloses a hybrid perovskite material with barocaloric effects and application thereof. The hybrid perovskite material with the barocaloric effects is in an ABX3 perovskite structure with the barocaloric effects, wherein A is ammonium cation, B is metal cation, and X is organic bridging ligand. With the barocaloric effects, the hybrid perovskite material achieve higher refrigerating efficiency compared with traditional refrigerating materials and can be applied to refrigeration equipment. Compared with traditional barocaloric materials, the hybrid perovskite materials with the barocaloric effects has the advantages of being simple in component regulation, low in cost, good in water solubility and the like and broadens the application prospect.

The invention relates to a taurine separation and purification device. The taurine separation and purification device is suitable for a method for synthesizing taurine by taking oxirane as a raw material. The method specifically includes the steps that an ionization multi-channel nozzle device is utilized to mix the oxirane with sodium hydrogen sulfite and other gas, liquid and solid phase catalysts through nanoparticles to prepare sodium 2-hydroxyethanesulfonate, then sodium taurate is prepared through the high temperature and high pressure and concentration, and the sodium hydrogen sulfite is adopted to neutralize sodium taurate material liquid; and in a ceramic nano metal molecular cage assembly, through a self-assembly reaction of a tridentate bridging ligand containing organic sulfurand nitrogen and bivalent nickel, palladium or platinum ions, a cubic metal-organic cage with O<h> symmetry is constructed, meanwhile, exchange of hydrogen ions and sodium ions and solvent molecular catalysis are accommodated, and thus the taurine is obtained. A mother solution is concentrated and separated to obtain sodium sulfite to serve as a raw material of an oxirane reaction, a carrier for absorption and transport of sulfur dioxide, and a raw material for neutralization of the sodium taurate material liquid. Waste-liquid-free cycle production of the taurine is achieved.

The invention discloses a Cu-Eu red fluorescent and magnetic microporous structure complex and a preparation method thereof. The preparation method comprises the following steps: by taking pyridine dicarboxylic acid as a bridging ligand, dissolving pyridine dicarboxylic acid into deionized water according to a certain molar ratio, adding CuCl2 and EuCl3, stirring and filtering to obtain a light blue solution, and standing for three days to obtain blue-green hexagonal micro-crystals. A prepared 3d-4f metal compound can be used for greatly improving the photo-conversion efficiency based on the ligand, copper ions and pyridine dicarboxylic acid can play roles as antennae and can be used for transferring the energy of ultraviolet light to rare earth ions, and by virtue of the 3d-4f metal compound, the copper ions and pyridine dicarboxylic acid, novel geometric and topological structures can be provided, and the overall luminous efficiency of the complex can also be improved. According to the complex disclosed by the invention, metal ions are in anti-ferromagnetic coupling in a range of 300-100K, and the metal ions have ferromagnetic coupling interaction effects in a range of less than 100K.

The invention relates to an ionic rare-earth metal organic coordination polymer and a preparation method thereof. The coordination polymer is obtained in a way that carboxyl-functionalized ionic liquid brominated 1, 3-diacetate imidazole is taken as bridging ligand and reacts with ethanol and water mixed solvent. The coordination polymer has potential ion exchange function, catalytic function and gas storage function and has a great value of application in the field of material science.