52results about How to "Improve electron-attracting ability" patented technology

The invention discloses an azaxanthone compound and applications of the azaxanthone compound in organic electroluminescent devices. According to the present invention, the azaxanthone compound uses azaxanthone as the core, the molecules are not easily crystallized and are not easily aggregated, and the azaxanthone compound has good film forming property; and with the application of the azaxanthone compound as the light emitting layer main material of the OLED light emitting device, the current efficiency, the power efficiency and the external quantum efficiency of the device are greatly improved, and the service life of the device can be remarkably improved.

The invention relates to a 2-[(N- alkyl carbazolyl) vinyl]-1, 8-naphthyridine derivative as well as a preparation method and an application thereof, which relates to the 1,8-naphthyridine derivative and a preparation method and an application thereof, and solves the problems in the existing bi-photon absorption material that a molecular synthesis route of a large yoke system is long, the efficiency is low, the heat stability is poor and the photochemical stability is poor. The structural formula of the 2-[(N- alkyl carbazolyl) vinyl]-1, 8-naphthyridine derivative is as follows: the preparation method of the 2-[(N- alkyl carbazolyl) vinyl]-1, 8-naphthyridine derivative is characterized in that 2- methyl-1, 8-naphthyridine is linked with N-alkyl carbazole to have Knoevenagel reaction under the condition by adopting zinc chloride (ZnCl2) as condensing agent and dimethyl formamide (DMF) as solvent. The 2-[(N- alkyl carbazolyl) vinyl]-1, 8-naphthyridine derivative has strong fluorescent absorption performance and bi-photon absorption performance and good photochemical stability and heat stability. The 2-[(N- alkyl carbazolyl) vinyl]-1, 8-naphthyridine derivative is applied to the field of the laser three-dimensional micro machining and the conversion of bi-photon fluorescent.

The invention discloses an fPP (fluoropyridine [3,4-b] pyrazine) compound, a fPP-based copolymer material and an application of the fPP-based copolymer material. The fPP-based copolymer material is prepared from the fPP compound, benzodithiophene containing an alkylthrophene or alkylthio-throphene side chain as well as other components through Stille coupling, has good solubility, is processed into a film easily and has a good photoelectric conversion function, when the material is used for preparing organic solar cell devices, the photoelectric conversion efficiency all exceeds 5%, and the highest photoelectric conversion efficiency of single layer device is as high as 6.2%.

The invention relates to a hydrogenation catalyst for preparing hydrogenation petroleum resin and a preparation method thereof; the hydrogenation catalyst is a Pd / Ag / group VB metal / gamma-Al2O3 composite catalyst. The preparation comprises the steps: preparing a palladium salt, a silver salt and a group VB metal compound, and dissolving in a solvent, to obtain a mixed solution; and placing a carrier gamma-Al2O3 in a fluidized bed reactor, uniformly spraying the mixed solution onto the carrier to obtain a composite carrier, drying, roasting, reducing, and thus obtaining the product. The catalyst has relatively strong catalytic activity in preparation of the hydrogenation petroleum resin, and has relatively good resistance to toxicity of sulfur, nitrogen, halogen and other impurities, and has a relatively long catalyst service life.

The invention discloses an azaxanthone compound and its application in an organic electroluminescent device. The compound takes azaxanthone as the core, and has the properties that it is not easy to crystallize and aggregate between molecules, and has a good composition. Membrane characteristics. When the compound of the present invention is used as the main material of the light-emitting layer of the OLED light-emitting device, the current efficiency, power efficiency and external quantum efficiency of the device are greatly improved; at the same time, the life of the device is significantly improved.

The invention discloses organic light-emitting materials containing a dinitrogen difluoride-boron-oxygen heterocyclic receptor structural unit that are as shown in the formula (1) or the formula (2) and application thereof. By using the high-eletrophilicity dinitrogen difluoride-boron-oxygen heterocyclic structural unit as the receptor and combining different donors, a thermotropic delayed fluorescent material with high quantum efficiency, easily-adjustable emitting color, good device performance and high device luminance can be formed. The material has a huge application prospect in the fieldof OLED materials.

The invention discloses preparation and application of a thermally active delayed fluorescent material on the basis of an isoindigo unit. By introducing four cyano groups into the isoindigo unit, a novel strong absorption electron structural unit is constructed, reduction of overlapping of the highest occupied molecular orbital and lowest unoccupied molecular orbital of molecules is facilitated, correspondingly the energy level difference between the singlet state and triplet state of the molecules is reduced, and thermally active delayed fluorescence is obtained. Furthermore, the material isused as a light-emitting layer dopant, an organic electroluminescent device is prepared through a solution method, and the maximum external quantum efficiency of up to 14.1% is obtained.

The invention provides chlorosulfonated poly(propylene carbonate) which has a structure as shown in a formula I. Compared with existing poly(propylene carbonate) and chlorinated poly(propylene carbonate), the chlorosulfonated poly(propylene carbonate) with a specific structure is obtained through design, due to the combined action of sulfonyl groups and chlorine elements, the electronegativity is greatly enhanced, the electron withdrawing capacity is sharply improved, the chlorosulfonated poly(propylene carbonate) can have better interaction with other materials, and can be applied to the fields of adhesives, non-setting adhesives, coatings and the like. According to the invention, a high-activity chlorosulfonyl active group is introduced to a poly(propylene carbonate) molecular chain, so that the molecular weight of a final product can be reduced to different extents, and the interfacial compatibility between poly(propylene carbonate) and different substrates is effectively regulated and controlled, thereby changing the form and viscosity of the product. Meanwhile, the chlorosulfonated poly(propylene carbonate) is a full-biodegradable material.

The invention discloses a pyrrolopyrrole diketone-benzothiadiazolyl conjugated derivative and a preparation method and application thereof. The pyrrolopyrrole diketone-benzothiadiazolyl conjugated derivative has the general structure shown in the description. The preparation method comprises the following steps of: under the protection of nitrogen, putting 4,7-bis (thiophene-2-yl) benzo[c][1,2,5]thiadiazole and pyrrolopyrrole diketone bithiophene compounds into a reaction system catalyzed by palladium acetate, carrying out carbon-hydrogen activation direct coupling reaction, and separating and purifying the prepared crude product to obtain the pyrrolopyrrole diketone-benzthiadiazolyl conjugated derivative. According to the invention, the dithienyl pyrrolopyrrolopyrrolodione and the benzothiadiazolyl derivative are coupled, so that the prepared material has good visible near-infrared light absorption performance, and higher hole mobility, solubility and photoelectric conversion efficiency.

The invention provides a fluoroborate dipyrrole fluorescent dye, a preparation method and application thereof, and belongs to the field of fluorescent dyes. The invention provides a fluoroboron dipyrrole fluorescent dye, centering on BODIPY, introducing toluene at the 8th position, increasing the conjugated system, introducing propylene at the 3rd and 5th positions, improving the electron-absorbing ability, making The ultraviolet absorption spectrum and the fluorescence emission spectrum of the obtained fluoroboron dipyrrole fluorescent dye have a large red shift, a strong absorption peak in the green light range, and a strong emission peak in the green light range in the fluorescence emission spectrum.

The invention provides a method for cracking sludge by virtue of singlet oxygen and relates to a sludge cracking method. The method comprises the steps of adding a catalyst pyroracemic acid and antioxidants peroxides (peroxymonosulfate and percarbonate) into to-be-cracked sludge, stirring to react, pumping supernate of the cracked sludge back into an aeration tank, and carrying out treatments including dehydration and the like on the residual sludge. According to the method, a bisepoxy intermediate is generated by catalyzing peroxides by virtue of pyroracemic acid and further reacts with peroxides to generate singlet oxygen and pyroracemic acid, peroxides are continuously catalyzed by generated pyroracemic acid, and generated pyroracemic acid plays a role of circular catalysis during reaction, generated high-activity singlet oxygen is capable of damaging the structure of sludge floc and releasing bound water, improving the dehydration performance of sludge and damaging the cell structures of microorganisms. The method has the characteristics that the sludge treatment effect is good, toxic and harmful products are not generated, a required carbon source is provided for sewage treatment, and the catalyst pyroracemic acid and the antioxidants peroxides are environmentally friendly and safe and have no toxic and side effects.

The invention relates to a water treatment method for decontamination by catalyzing peroxide to generate singlet oxygen, which relates to a water treatment method. The invention provides a water treatment method for generating singlet oxygen by catalyzing peroxide to remove pollution. The water treatment method of the present invention: add the catalyst pyruvic acid and the oxidizing agent peroxide (peroxymonosulfate, percarbonate) into the water to be treated, and stir. In the water treatment method of the present invention, pyruvic acid catalyzes the peroxide to produce a double epoxy intermediate, and the double epoxy intermediate further reacts with the peroxide to produce singlet oxygen and pyruvic acid, and the generated pyruvic acid continues to catalyze the peroxide, and in the reaction It plays the role of cyclic catalysis, and the generated highly active singlet oxygen degrades organic matter to achieve the purpose of decontamination. The invention has high pollution removal efficiency, does not produce toxic and harmful by-products, the catalyst pyruvic acid and the oxidant peroxide are green, safe, and has no toxic and side effects, the reaction is less affected by water conditions, can be applied on a large scale, and is more suitable for emergency treatment.

The invention provides a seven-membered nitrogen-containing heterocyclic derivative and an organic electroluminescence device thereof, which relate to the technical field of organic photoelectric materials. The compound connects a seven-membered nitrogen-containing heterocyclic group derived from triphenylamine containing a double bond to a six-membered conjugated ring containing at least one nitrogen atom. First, the seven-membered nitrogen-containing heterocyclic ring has a large steric hindrance, and the compound The thermal stability of the compound is good; the seven-membered nitrogen-containing heterocyclic ring is connected with a six-membered conjugated ring containing at least one nitrogen atom, so that the compound has enhanced electron-absorbing ability and good electron transport ability when an appropriate voltage is applied; the seven-membered nitrogen-containing heterocycle The intermolecular aggregation of nitrogen heterocyclic derivatives is small, and the film-forming property is good. The compound is used as an electron transport layer material and a light-emitting layer host material in organic electroluminescent devices, which can reduce the driving voltage of the device, and can also significantly improve the luminous efficiency and life of the device. It is a kind of organic electroluminescent device with excellent performance Material.