16 results about "Lone pair" patented technology

The molecular adsorbent according to the present application adsorbs a polar molecule, and contains, as an active ingredient, an ion exchanger having: an ion exchange resin containing an ion exchange group which is a strongly acidic group; and a metal ion or a complex of a metal ion which is ion-exchanged with the ion exchange group. The polar molecule contains a nitrogen atom having a lone pair of electrons. The metal ion is one or more of a metal ion of 3 valence or more, Co 2+ , Cu 2+ , Ni 2+ , Mn 2+ , V 2+ , Cs + , Rb + , and K + .

The present invention provides a novel compound containing a rigid fluorenyl substituent in 1, 10-phenanthroline having lone pair electrons, and an organic light-emitting element comprising the same. When applied to one or more organic layers, including an electron transport layer (ETL), a hole blocking layer (HBL), and an N-type charge generation layer (N-CGL), the novel compound enables the realization of a low-voltage, high-efficiency, long-life organic light-emitting element.

The application provides a catalyst and a preparation method thereof, and a preparation method of 2,2,6,6-tetramethyl-4-piperidinol, and relates to the technical field of catalysts. The catalyst comprises a carrier and a transition metal supported on the carrier, and the carrier is an ordered mesoporous titanosilicate material internally modified with nitrogen-carbon material and containing trivalent titanium. The carrier in the catalyst of the application is an ordered mesoporous titanosilicate material internally modified with nitrogen-carbon material and containing trivalent titanium, the nitrogen in the nitrogen-carbon material can provide a lone pair of electrons, which is a Lewis base site, and the trivalent titanium is in an electron-deficient state, which is a Lewis acid center, and the two form a hindered Lewis acid-base pair in the ordered mesoporous confined space. The hindered Lewis acid-base pair formed in the catalyst is beneficial to anchoring the transition metal active component and promoting the adsorption and activation of the reaction substrate tetramethylpiperidone, thereby helping to improve the reaction kinetics of the catalytic hydrogenation process.

The invention relates to a perovskite precursor solution, a perovskite thin film, a perovskite battery, and a power consumption device. The perovskite precursor solution contains a surfactant, the structure of which comprises a hydrophilic group, a hydrophobic group, and a first functional group, the first functional group being a Lewis base containing a lone pair of electrons, and the lone pair of electrons being located on at least one of the N atom and S atom.

This invention discloses a butterfly-shaped NBS-COFs catalyst and its preparation method, belonging to the field of photocatalysis technology. Firstly, a butterfly-shaped thiophene sulfone-based precursor is reacted with a borate group via a Schiff base reaction to construct a covalent organic framework (BS-COFs) containing an electron-deficient component and a borate sulfone group. The methyl group provides the basis for the subsequent aldol condensation reaction. Secondly, a post-modification method is used to react the aldehyde group on the amino compound with the methyl group on the BS-COFs via an aldol condensation reaction, forming an NBS-COFs catalyst with an aminated, highly conjugated system and an electron-deficient structure. Thirdly, the lone pair electrons on the amino group are directionally anchored to the empty orbitals of Pt, thereby achieving high dispersion of Pt. The introduction of thiophene sulfone expands the light absorption range, and the planar structure facilitates the transport of photogenerated charges along the framework. The combination of thiophene sulfone and the electron-deficient component accelerates the separation and transport of photogenerated carriers, while the conjugated system avoids charge recombination. When used for photocatalytic water splitting to produce hydrogen, it exhibits excellent hydrogen production rate and stability, showing promising prospects in the field of photocatalysis.

The invention relates to a semiconductor wafer after-amination cleaning solution and a preparation method and application thereof, and the semiconductor wafer after-amination cleaning solution comprises the following components by weight: 60-80 parts of an alcohol organic matter; 1-4 parts of a phenolic acid compound; 0.5 to 2 parts of a pyridazine compound; and 10 to 20 parts of ultrapure water. The combination of phenolic acid compounds and pyridazine compounds is adopted, the phenolic acid compounds and the pyridazine compounds contain polar groups of O and N atoms with large electronegativity, the O and N atoms with large electronegativity in the polar groups contain lone pair electrons, and the lone pair electrons interact with metal, so that the electronegativity of the metal is improved. Therefore, a protective barrier is formed between metal and alloy surfaces and a corrosive medium, and the purpose of retarding metal corrosion is achieved.

The present application relates to an additive having the general structure I, wherein R 1 and R 2 are independently of each other hydrogen or C1-C 12 alkyl; R 3 and R 4 are independently of each other hydrogen, halogen or C1-C 12 alkyl; R 5 is hydrogen or C1-C 12 alkyl; R 6 is a 4-20 membered nitrogen-containing heterocyclyl group which is unsubstituted or substituted by a substituent, or a 5-20 membered nitrogen-containing heteroaryl group which is unsubstituted or substituted by a substituent, the substituent being halogen, hydroxyl, primary amino, secondary amino, C1-C 12 alkyl or C1-C 12 alkoxy; m is an integer from 1000 to 10000; n is an integer from 10 to 1000. In the additive of the present application, the group R 6 is a nitrogen-containing heterocyclyl group or a nitrogen-containing heteroaryl group, in which the nitrogen atom has a lone pair of electrons, which can form a strong adsorption to HF in the battery, thereby fixing the HF and avoiding its destruction of the passivation layer on the surface of the positive current collector, so that the corrosion of the positive current collector such as aluminum foil can be greatly alleviated, and the service life of the battery can be prolonged.

The disclosure provides a perovskite film containing a bifunctional additive, a light-emitting diode and a preparation method thereof, wherein the bifunctional additive has a structure as shown in formula (1): wherein A1 is selected from C1-C5 alkyl; X is selected from at least one lone pair electron group containing N, O, F, Cl, Br and I, the lone pair electron group forms an intermolecular hydrogen bond self-assembly structure with the amino group in formula (1) as a physical spacing layer, inhibits the loss of non-radiative energy of the perovskite film caused by the generation of low-energy state exciton complexes at the interface of the charge transport layer, and passivates the unsaturated lead dangling bond caused by halide vacancies, thereby reducing defects in the perovskite film. By using the hydrogen bond or intermolecular force formed between the amino group in the additive and the amino group in formamidinium hydroiodide in the perovskite system, the grain growth during the perovskite film formation process is slowed down, thereby inducing the FAPbI3 perovskite film to have higher crystallinity, and improving the quality and light-emitting efficiency of the film.

The present invention provides an organic compound that can be suitably used as a light-emitting material for displays, and an organic light-emitting device containing such an organic compound. [Solution] An organic compound according to one embodiment of the present invention has a lone pair of electrons and a π electron orbital, and the energy level E of the lowest singlet excited state S1 S1 From the lowest triplet excited state T1, the energy level E T1 The energy difference ΔE after subtracting ST -0.20eV≦ΔE ST It is <0.0090 eV.

The invention relates to a material of the formula SnTiO3 having a crystal structure comprising layers, wherein the layers comprise Sn(II) ions, Ti(IV) ions and corner- sharing O6-octahedra, the corner-sharing O6-octahedra form sub-layers, the Ti(IV) ions are located within 2 / 3 of the corner-sharing O6-octahedra to form corner-sharing TiO6-octahedra, the corner-sharing TiO6-octahedra form a honeycomb structure comprising hexagons within the sub-layers, the hexagons have Ti(IV)-voids within, the Sn(II) ions are located above and below the Ti(IV)-voids with respect to the sub-layers and the crystal structure satisfies at least one of the following features (i) and (ii): (i) the Sn(II) ions have a tetrahedral coordination shell, the tetrahedral coordination shell contains three O ions of the layer and an electron lone pair of the Sn(II) ion, the electron lone pair is located in a top position with respect to the three O ions of the layer, (ii) the layers are stacked in a specific manner.

The application provides an organic compound, an OLED device and a display panel. The organic compound provided by the application introduces a larger conjugated structure containing a nitrogen atom, and the lone pair electrons in the nitrogen atom are conjugated to a benzene ring. The structure formed by the seven-membered nitrogen-containing heterocycle and the large conjugated system generally has good stability, and the hole transport effect is obviously strengthened, which is related to the electronic structure distribution of the seven-membered nitrogen-containing heterocycle. The lone pair electrons of the N atom participate in the construction of the large conjugated system, so that the transmission is more matched. By introducing the seven-membered nitrogen-containing heterocycle in the conjugated system, the charge transport of the molecule can be more balanced, the stability of the host material can be improved, and the light-emitting device prepared therefrom can greatly improve the carrier transport efficiency of the device, and then improve the efficiency and service life of the device.

The application discloses a method for preparing graphene supported high-entropy alloy by a sacrifice template method, and belongs to the field of metal chemistry. In view of the problem that in the prior art, the physical and chemical property differences of different elements will limit the uniform mixing of the elements, and not only the ideal high-entropy state is difficult to obtain, but also the selection of elements is limited, in the technical scheme of the application, the characteristics of the carbon nitride surface rich in lone pair electrons are used to adsorb metal ions, and the reducing gas generated in-situ near the metal in the heating process of the carbon nitride is used to cooperatively reduce the Gibbs free energy change of the high-entropy alloy; meanwhile, in addition to the part of the carbon nitride generating the reducing gas, the remaining carbon nitride will be converted into defect-rich graphene in-situ under the catalysis of the generated metal, so that the preparation of the graphene supported high-entropy alloy can be realized at a lower temperature.

The application provides a preparation method of deuterated betaine, and relates to the technical field of betaine. In suitable alkaline conditions, the positive methyl in deuterated iodomethane attacks the nitrogen atom containing a lone pair of electrons in N,N-dimethyl glycine to form a quaternary amine nitrogen to generate deuterated betaine. Then, the pH is adjusted to be neutral to remove sodium salt, and then impurities are effectively removed through a predetermined washing liquid. The method is simple to operate and convenient, and does not need recrystallization. Then, the pH is adjusted to be weakly acidic, so that deuterated betaine hydrochloride is not generated, deuterated betaine can be effectively separated, impurities are further removed, the yield of the product is high, and the separation is simple.

The invention provides a substituted imidazole compound, a rhenium extraction agent, a preparation method of the rhenium extraction agent and a method for separating molybdenum and rhenium, and relates to the technical field of hydrometallurgy. The structural formula of the substituted imidazole compound is shown in the specification. The substituted imidazole compound takes an imidazole ring as a molecular skeleton, the imidazole ring is modified through a substitution reaction, a plurality of aromatic ring functional groups are introduced, and the hydrophobic property, steric hindrance and electron density of a rhenium extraction agent are adjusted, so that the rhenium extraction agent is more favorable for being combined with ReO4 <-> to realize separation, and the water-phase solubility of the extraction agent is reduced, thereby reducing the dissolution loss of the extraction agent; a large-steric-hindrance aromatic ring is introduced to react with quaternization, an aliphatic chain is introduced to an N-active site, and the electrical property of an imidazole ring and the distribution condition of electron clouds are adjusted, so that a Z-bond network is formed in an organic phase and can be effectively bonded with perrhenic acid radical ions; lone pair electrons of the N-activation site and imidazole ring conjugated electron cloud cooperate with each other, so that perrhenate ions can be combined to the maximum extent.

The invention relates to a silicon precursor composition for preparing a silicon nitride film and a preparation method and application of a doped silicon nitride film. The silicon precursor composition comprises a phosphorus-containing compound with a structure as shown in a chemical formula I and / or a chemical formula II. The silicon precursor containing the phosphino group and the amino group is used for preparing a doped silicon nitride film, and because phosphorus atoms in the phosphino group have lone pair electrons and have very strong electron donating ability, the phosphorus atoms and most metal precursors can form strong and stable coordinate bonds, so that metal can be better deposited on the surface of the film; meanwhile, amino and phosphino serve as catalytic sites, reaction of precursor molecules on the surface of a substrate is greatly promoted, and cracking and bonding can be achieved at the low temperature; in addition, doping of phosphine can replace nitrogen atoms in a network, the average bond length is shortened, metal atoms can be effectively contained, and atom accumulation is optimized. Therefore, the density of the film is increased, and the purity of the film is improved.

The application discloses application of a kind of non-conjugated small molecule containing heteroatom in fluorescence field.The non-conjugated small molecule containing heteroatom has any one of the following formula (I)-(IV) structure: compared with most non-conjugated polymers (such as polyacrylonitrile) containing a large number of heteroatoms, the application makes full use of four heteroatoms in small molecules to form intramolecular stable space interaction between lone pair electrons, thereby realizing more efficient luminescent performance, realizing efficient use of lone pair electrons brought by heteroatom.