67results about How to "Increased electron cloud density" patented technology

The invention relates to a heteroatom zeolite adsorbent and a preparation method thereof and mainly aims at solving the problems that purifying accuracy of an adsorbent is low, adsorption capacity is low and regeneration stability is poor in existing olefin adsorption purification. The preparation method comprises the following steps: introducing at least two metal cations by adopting an ion exchange or impregnation method for modifying zeolite, and moulding by virtue of a binding agent, so as to obtain a solid adsorbent. By adopting the technical scheme, the problems are relatively well solved, and the heteroatom zeolite adsorbent provided by the invention can be applied to adsorption purification industrial production and can be used for removing sulphur compounds in various olefin raw materials.

The invention provides a fused ring non-fullerene acceptor material, and a preparation method and an application thereof. The fused ring non-fullerene acceptor material comprises an electron donatingunit and electron withdrawing end groups, the electron donating unit is a carbon-oxygen bridge trapezoidal fused ring structure, the electron withdrawing end groups are connected to two ends of the electron donating unit, and the fused ring non-fullerene acceptor material has a structure represented by formula I or formula II. The prepared fused ring non-fullerene acceptor material prepared through the preparation method has excellent light absorption and carrier transport properties, can be easily dissolved in common organic solvents, has strong visible near-infrared absorption property and high electron mobility (being more than or equal to 10<-5> cm<2>.V<-1>.s<-1>), realizes a high short-circuit current and a high energy conversion efficiency in organic solar cells, and has a broad application prospect and high application values.

The present application provides a nitrogen-containing compound, an organic electroluminescent device, and an electronic device, the chemical structure of the organic compound comprises a carbazole ring, and the organic compound can be used as a light-emitting layer material in the electroluminescent device, improves the efficiency of the organic electroluminescent device, and prolongs the lifetime of the organic electroluminescent device.

The invention discloses naphthofuran-structure-containing biaryl monophosphine ligands, and a preparation method and application thereof. The biaryl monophosphine ligands are compounds disclosed the chemical structural formula (VIII) or antipodes or racemates thereof. According to the biaryl monophosphine ligands, the furan ring is introduced and forms a conjugated structure with the dinaphthalene, thereby increasing the steric hindrance of the phosphine ligands (including antipodes or racemates thereof) and the cloud density of the aromatic ring, and enhancing the stability of the complexes. The steric hindrance of the ligands is regulated, so that the ligands have novel structure. The preparation process comprises the steps of Sonogashira reaction, intramolecular cyclization, C-P coupling reaction and the like. The synthesis method is simple; and the obtained ligands have the advantages of high activity, favorable selectivity and the like when being used for Suzuki-Miyuara reaction.

The invention provides a room temperature cured fluorocarbon coating modified with nano particles and a preparation method of the room temperature cured fluorocarbon coating. The fluorocarbon coating specifically comprises a component A and a component B, wherein the component A comprises, by weight, 30%-45% of FEVE fluorocarbon resin, 20%-30% of nano-titanium dioxide filler, 2%-10% of discoid nano-europium oxide filler, 15%-20% of a solvent as well as a flatting agent, a defoaming agent, a wetting dispersant, a thixotropic agent and pigment which account for 4%-10% of the total mass of the component A; the component B comprises, in percentage by mass, 10%-50% of isocyanate type curing agents and a solvent. The weather resistance of the fluorocarbon coating is further improved through the higher shielding effect of nano-europium oxide for ultraviolet light and the composite effect of nano-titanium dioxide and nano-europium oxide.

The invention provides a carbene iridium catalyst and a preparation method and application thereof, the carbene iridium catalyst has good application in preparation of methyl acetate through methanolcarbonylation, and the carbene iridium catalyst is mainly prepared from a CAAC ligand, 1, 5-cyclooctadiene iridium chloride and bis(trimethylsilane) amino potassium as raw materials. The preparation method comprises the following steps: drying raw materials for preparing the carbene iridium catalyst, replacing with nitrogen, sequentially adding acetone and liquid nitrogen, performing reacting at-78 DEG C, and extracting a reaction product with a solvent. According to the invention, the CAAC-IrCl (COD) catalyst of the CAAC ligand with relatively strong electron donating capability is applied tothe aspect of preparing methyl acetate through methanol carbonylation, so that the stability of the catalyst is improved, the methyl acetate is directly prepared under relatively mild and anhydrous conditions, the preparation process is simplified, and the operation cost is reduced.

The invention discloses an organic dye based on asymmetric terthienyl pyrrole and a preparation method and application thereof, and belongs to the technical field of solar batteries. The organic dye is characterized in that triphenylamine is used as an electron donor, cyano-acrylate is used as an electron receptor, and an asymmetric terthienyl pyrrole unit is used as a conjugate bridge; the terthienyl pyrrole unit has a rigid co-plane structure, the electron cloud density is high, and the red shift dye absorption spectrum is effectively widened; the N-substituting group of the terthienyl pyrrole unit is easily modified, different electrons and space effect groups are conveniently introduced, the energy gap of the molecules is conveniently adjusted, the aggregation of the dye is reduced, and the photoelectric property of a battery device is improved. According to the application of the organic dye based on the asymmetric terthienyl pyrrole as the conjugate bridge in the dye-sensitized solar batteries provided by the technical scheme of the invention, after proofing by testing results, the short-circuit light current density of the battery device is 15.2mA cm<-2>, the open-circuit voltage is 885mV, and the photoelectric conversion efficiency reaches 9.22%.

The invention discloses a preparation method of a baloxavir key intermediate and the intermediate thereof. The method includes subjecting 3,4-difluoro-2-methyl benzaldehyde shown as a formula (I) as araw material to a bromination reaction to obtain 3,4-difluoro-2-bromomethyl benzaldehyde shown in a formula (II), carrying out a substitution reaction to obtain 3,4-difluoro-2-(((2-bromophenyl) thio)methyl)-benzaldehyde shown in a formula (III), and finally, carrying out a nucleophilic addition reaction to synthesize a target product, namely 7,8-difluorodibenzo[b, e]thiepin-11(6H)-ol shown in aformula (IV). The specific reaction process is shown in the specification. According to the method, 2-bromothiophenol is used for replacing foul and virulent thiophenol, the reaction steps are reducedto three steps, and the preparation method is high in yield, low in cost, environmentally friendly and easy to operate.

The invention discloses a purple fluorescent material containing tertiary butyl fluorene and a preparation method thereof. The fluorescent material is characterized in that it is a fluorene organic compound with a molecular formula C37H42; the fluorescent material is synthesized by mixing and reacting 2,7-dibromo-9,9-diethyl fluorene, 4-tert butyl benzoboric acid, tetrakis(triphenylphosphine)palladium and potassium carbonate according to a certain proportion; and the synthesis has simple steps and reaches yield of 60%-92%. Tert butyl benzoboric acid and fluorene are subjected to a cross-coupling reaction to prepare the organic compound with fluorescence properties; and the conjugated big pi bond rich in electrons is conducive to electron transition and energy transfer, so that the compound has good photoelectric activity namely high luminous efficiency, and has potential application prospect.

The invention relates to a high-efficiency dark blue fluorescence doped material and an OLED organic electroluminescent device. The invention discloses an organic electroluminescent compound and an organic electroluminescent device containing the same, and the structural formula of the organic electroluminescent compound is shown as a formula I. The compound can be used as an organic electroluminescent material, and a seven-membered ring is formed by combining Ra and Rb with Z1, Z2, Z3 and Z4, Z5 and Z6 in a bridging manner. The seven-membered ring increases the material molecule, rigidity andplanarity, can effectively improve the thermal stability of the material molecule and prolong the service life of the material, and the introduction of the seven-membered ring improves the conjugation effect of the material molecule and can increase the electron cloud density of a conjugation system, thereby increasing the luminous efficiency of the material molecule. Experiments show that compared with the prior art, the material provided by the invention has the advantages that the service life is obviously prolonged, and the efficiency is obviously improved.

The invention relates to a modification method for an inorganic carrier. The inorganic carrier is modified by using organic molybdenum. The modification method comprises the following steps: immersingthe inorganic carrier into an organic solution containing the organic molybdenum at the temperature of 25-100 DEG C for 1-12h, and then, drying the inorganic carrier in a 100-300 DEG C nitrogen environment for 5-20h; and placing the dried inorganic carrier into a strong acid solution, immersing the inorganic carrier for 2-10h, and then, drying the inorganic carrier in the 100-300 DEG C nitrogen environment for 5-20h, wherein the content of Mo metal accounts for 0.01wt%-5wt% of the total weight of the inorganic carrier. The invention further relates to a chromium-based polyethylene catalyst. Negative charges on molybdenum atoms are capable of increasing the electron cloud density of chromium atoms to increase the reduction speed of Cr (VI), so that the induction time of a chromium-based catalyst is shortened, and meanwhile, the copolymerization property of Cr (VI) is improved.

The invention provides an oxygen vacancy-contained VOCs eliminating catalyst. The oxygen vacancy-contained VOCs eliminating catalyst comprises a SiO2 carrier and oxygen vacancy-contained cobaltous oxide/cerium oxide loaded onto the SiO2 carrier. The invention further provides a preparation method of the oxygen vacancy-contained VOCs eliminating catalyst. According to the method, cobalt salt, cerium salt, urea and tetraethoxysilane are used as raw materials, and a sol-gel method and a temperature programming controllable hydrogen gas reduction method are adopted for preparing the loaded catalyst with silicon dioxide used as the carrier and the oxygen vacancy-contained cobaltous oxide/cerium oxide used as an active component. The oxygen vacancy-contained cobaltous oxide/cerium oxide has higher electron cloud density, is beneficial for adsorbing an oxygenated chemical formaldehyde and oxygen, and can promote the catalytic combustion activity of the catalyst; moreover, in the catalyst, theactive component is even in distribution, smaller in particle size, and beneficial for improving the activity of the catalyst of catalyzing formaldehyde combustion.

The invention discloses a bulky electron-rich phosphine ligand compound and a preparation method thereof. The structural formula of the phosphine ligand is shown in formula I; wherein, R represents an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group or an aryl group substituted by an alkane. The method for preparing the compound of formula I comprises the following steps: reacting the compound shown in formula II with the compound shown in formula III at -90°C to -60°C for 2-5h, and then reacting at room temperature for 5-15 hours, namely have to. The lone electron pair on the methoxyl oxygen in the large-volume thiophene-containing ligand synthesized by the present invention can increase the electron cloud density of the molecule, which is beneficial to stabilizing the Pd intermediate in the reaction process, preventing cyclization, and increasing steric hindrance. Improve catalyst life. In addition, the thiophene ring is a group with a stronger electron supply than aryl or alkyl, which is beneficial to increase the electron cloud density on the phosphine and improve the activity of the ligand. The ligand of the present invention is coordinated with the palladium catalyst and then applied to Suzuki coupling or polymerization reaction to synthesize photoelectric polymer materials with high molecular weight and high yield.

The invention belongs to the technical field of water treatment, and discloses a modification method for improving chlorine resistance of a polyacrylonitrile forward osmosis membrane. The method comprises the steps: dissolving polyacrylonitrile in an organic solvent N-methyl pyrrolidone, adding a pore-foaming agent, putting the mixture into an ultrasonic cleaning machine for degassing treatment after the mixture is completely dissolved, and removing gas generated in the stirring process to form a membrane casting solution; pouring the membrane casting solution on a glass plate, scraping the membrane by using a membrane coating device, then immediately putting the membrane into a deionized water coagulating bath, and obtaining a polyacrylonitrile support membrane by using an immersion-precipitation phase inversion method; and preparing a polyamide functional layer by virtue of an interfacial polymerization method, then cleaning with n-hexane, and removing unreacted 1,3,5-trimesoyl chloride on the surface, so as to obtain the cyclohexylamine modified polyacrylonitrile forward osmosis membrane. On the premise of ensuring the flux of the polyacrylonitrile forward osmosis membrane, the chlorine resistance of the membrane is greatly improved.

The invention discloses bicyclo-imidazoline laurate. The bicyclo-imidazoline laurate has a symmetrical molecular structure, comprises two imidazoline heterocycles and two alkyl long chains of lauric acid, and thus, plenty and dense electronic clouds and good hydrophobicity can be provided. The invention further discloses a bicyclo-imidazoline laurate synthesis method, which is low in raw materialcost and high in reaction yield and can achieve industrial production. The invention further discloses an application of the bicyclo-imidazoline laurate. The electrotransport type cationic bicyclo-imidazoline laurate is obtained through activating bicyclo-imidazoline laurate and is applied to the rusting prevention of reinforced concrete.

The invention discloses a non-aqueous electrolyte and a lithium ion battery containing the non-aqueous electrolyte. The non-aqueous electrolyte comprises a sulfonamide additive. Furthermore, the non-aqueous electrolyte also comprises an ester additive. In the electrolyte provided by the invention, the sulfonamide additive can be oxidized into a CEI film with good high-temperature stability on the surface of a positive electrode so as to inhibit the catalytic oxidation decomposition of a high-nickel positive electrode material on the electrolyte. Besides, the sulfonamide additive and the ester additive are matched with each other, so that the acidity of the electrolyte is inhibited from being increased, the ester additive can be reduced into an SEI film with good mechanical property on the surface of the negative electrode, and the normal-temperature circulation, high-temperature circulation and high-temperature storage performance of the battery are remarkably improved through the mutual synergistic effect of the sulfonamide additive and the ester additive.

The present invention relates to a composite catalyst, preparation process thereof, and process for catalyzing the trimerization of butadiene using the composite catalyst. The composite catalyst comprises: (A) a titanium compound catalyst active component, (B) an organometallic compound co-catalyst component, (C) a sulfoxide compound catalyst-modifying component, (D) a monoester compound catalyst-modifying component, and (E) a solvent component. The composite catalyst has advantages of excellent selectivity, high catalytic activity, easy preparation and so on.

The invention relates to a high-fluorine-containing C9 resin hydrogenation catalyst, which is composed of an active component M1, an auxiliary agent component M2 and a carrier component M3. Based on 100% of the total weight of the catalyst, the content of the M1 component is 37%-54%, the content of the M2 component is 4%-6%, and the balance is the M3 component. The component M1 contains Ni, Mo, Cu and Al, the component M2 contains Sm and Na, and the component M3 is amorphous silicon-aluminum MgAl2O4 composite oxide. The invention also discloses a preparation method and application of the catalyst. The catalyst provided by the invention is used for hydrogenation removal of fluorine and sulfur in C9 resin, and can effectively delay fluorine and sulfur poisoning of a rear-stage hydrogenation catalyst.