198 results about "Deprotonation" patented technology

This Invention relates to methods of treating a subterranean hydrocarbons reservoir comprising contacting the formation with a treating fluid comprising an aqueous solution, an acid, a surfactant acting as gelling agent essentially consisting of erucylamidopropyl betaine (or a protonated/deprotonated homolog or salt thereof). The treating fluid may further comprise a lower n-alcohol for improved temperature stability.

Organic lithium salts suitable for use in electrolytes for primary or secondary rechargeable batteries include de-localized bulky anions over Lewis acid fragments, typically BF₃, and organic moieties. The organic moieties may be, for example, anions derived from fused nitrogen heterocycles (e.g. benzeneimidate, benzitriazolate and the like); multi carboxylates (e.g. oxalate, 1,2,4,5-benzenetetracarboxylate and the like), and pyromellitic diimidate. The organic lithium salts of the invention have the general formula: Li_q[Org(MX_n)_m], in which Org represents the organic moieties and MX_n represents an organic or inorganic boron, aluminum or phosphorous containing Lewis acid. The organic lithium salts are conveniently prepared by reacting an organic compound having at least one de-protonation group selected from NH, OH, SH or COOH with an inorganic or organic lithium compound to generate an organic lithium processor salt, and thereafter bringing the organic lithium processor salt into contact with an inorganic or organic Lewis acid to obtain the organic lithium product salt.

The invention belongs to the field of quantum dots, and specifically relates to a light-emitting diode device and a preparation method thereof. The light-emitting diode comprises an anode, a compositelight-emitting layer, an electron transport layer and a cathode which are arranged in a stacked manner, wherein the composite light-emitting layer includes a perovskite quantum dot material and a non-perovskite quantum dot material, and the electron transport layer includes an electron transport material grafted with a defective passivating agent. The light-emitting diode not only can promote thecarrier transport performance, but also can effectively avoid methyl ammonium cation deprotonation between a defective group and the perovskite quantum dot material in the composite light-emitting layer, thereby optimizing the application effect of the perovskite quantum dot material in the light-emitting diode device, promoting the synergistic effect of the perovskite quantum dot material and the non-perovskite quantum dot material to produce excited-state complex electroluminescence, and improving the light-emitting efficiency of the light-emitting diode and the stability of the device.

The invention relates to the following: a method for step-by-step alkylation of primary polymeric amines by step-by-step deprotonation with a metallo-organic base and a subsequent reaction with an alkyl halide; a method for modifying tertiary polymeric amines with other functional groups; polymers with secondary/tertiary amino groups and with quaternary ammonium groups; polymers with secondary/tertiary amino groups and other functional groups, especially cation exchanger groupings; membranes consisting of the above polymers, either non-crosslinked or ionically or covalently cross-linked; acid-base-blends/membranes, and a method for producing same, consisting of basic polymers with polymers containing sulphonic acid, phosphonic acid or carboxyl groups; the use of ion exchanger polymers as membranes in membrane processes, e.g., polymer electrolyte membrane fuel cells, direct methanol fuel cells, redox batteries, or electrodialysis; the use of the inventive hydrophilic polymers as membranes in dialysis and reverse osmosis, nanofiltration, diffusion dialysis, gas permeation, pervaporation and perstraction.

A charged mesoporous silica nanoparticle (MSN)-based drug delivery system for controlled release and enhanced bioavailability is disclosed. The system comprises a positively charged MSN, which has a silica matrix and an array of pores and/or nanochannels in the matrix. The entire substance of the matrix, all the surfaces and the pores and/or nanochannels comprise a plurality of silanol (Si—OH) and quaternary ammonium functional groups. The bioavailability of a negatively charged bioactive compound can be increased by loading it into the pores and/or nanochannels. The silanol (Si—OH) functional groups on the surfaces lining the walls of the pores and/or nanochannels are free to deprotonate in a fluid having pH above the pI of the positively charged MSN and lead to a sustained release of the negatively charged drug from the pores and/or nanochannels, and thereby enhance the bioavailability of the drug.

The invention provides a rare earth extraction and separation method which comprises the following step of extracting a rare earth-containing solution through an organic phase containing an extraction agent and a diluent, wherein two extraction agents are selected from ionic liquid, positive ions in the ionic liquid are selected from quaternary ammonium positive ions or quaternary phosphonium positive ions, and negative ions in the ionic liquid are selected from negative ions obtained by performing deprotonation on an acidic phosphine extraction agent. When rare earth elements are extracted by taking two kinds of compounded different bifunctional ionic liquid as the extraction agents, the method has an obvious synergistic extraction effect and is high in rare earth extraction efficiency and good in separation effect. The experimental result proves that the synergistic extraction coefficients of La<3+>, Nd<3+>, Eu<3+>, Dy<3+> and Er<3+> can be 6, 100, 400, 300 and 450, the synergistic extraction coefficients of Ce<3+>, Pr<3+>, Sm<3+>, Ho<3+> and Lu<3+> are respectively 3, 9, 15, 25 and 30, and the method has an obvious synergistic effect.

The purpose of the invention is providing a micro-channel chemical preparation method of porous metal-organic framework material. The method comprises the following steps: respectively injecting a liquid medium containing one or more organic compounds with at least one unidentate ligand, a liquid medium containing one or more metal ions, a liquid medium containing a deprotonation assistant and an inert gas into a micro-channel reactor through different inlets, carrying out a coordination reaction on the above obtained mixed material liquid in the micro-channel at a certain temperature under a certain pressure to form a coordination compound, crystallizing, filtering, washing, and drying to prepare the porous metal-organic framework material, wherein the micro-channel reactor has at least two inlets and one outlet; the addition amount of the deprotonation assistant is 0-50% of the mole number of all metal ions; a ratio of the volume velocity of inert gas added into the micro-channel reactor to the bulk volume velocity of the liquid phase is 0-100:1; and the crystallization process can be omitted. The method has the characteristics of simple and safe operation, high efficiency, large throughput and easy amplification.

Chiral ruthenium catalysts comprising salen and alkenyl ligands are provided for stereoselective cyclopropanation, and methods of cyclopropanation are provided. The chiral ruthenium catalyst is prepared in situ by combining an alkenyl ligand, a deprotonated chiral salen ligand, and a ruthenium (II) metal. A preferred catalyst is prepared in situ by combining 2,3-dihydro-4-venylbenzofuran, deprotonated 1,2-cyclohexanediamino-N,N′-bis(3,5-di-t-butyl-salicylidene) and RuCl₂(p-cymene)]₂.

A wetness sensor for an absorbent article that is formed from an ink is provided. The ink includes a proton-accepting chromogen and a proton-donating agent (or color developer). Prior to use, the ink is generally dry and in a protonated form so that it has a visible color. However, upon contact with bodily fluids (e.g., urine, fecal matter, mucus, menses, vaginal fluid, etc.), water in the fluid can lead to deprotonation of the chromogen, thereby resulting in a shift of the absorption maxima of the chromogen towards either the red (“bathochromic shift”) or blue end of the spectrum (“hypsochromic shift”). To increase the rate of the color change during use, the present inventors have discovered that a specific type of proton-donating agent may be employed. More particularly, the proton-donating agent is an aliphatic carboxylic acid that is highly soluble in the bodily fluid (e.g., urine), and therefore results in a color change that is very rapid and may be detected within a relatively short period of time. The extent of the color change is also generally sufficient to provide a “real-time” indication of wetness on the absorbent article.

The invention discloses a rosin-based CO2/N2 response type polymerizable surfactant. Maleopimaric acid reacts with glycidyl methacrylate (GMA) for introducing polymerizable monomers, and then an imidization reaction is carried out with N,N-dimethyl-1,3-propane diamine for introducing tertiary amine groups capable of responding to CO2. The surfactant has a response property on CO2/N2, and after CO2is introduced, a water solution is weakly acidic, so that tertiary amine is protonated to form a tertiary amine salt and then is positively charged to become a form of a water-soluble cation; and after N2 is introduced to drive CO2, the positively charged tertiary amine salt is deprotonated to be recovered to an original state of a water-insoluble tertiary amine, and good response reversibility is achieved. The invention also discloses emulsification performance and dispersion performance of the surfactant, a Pickering emulsion and carbon nano tube dispersion liquid prepared by using the surfactant also have good responsiveness to the CO2/N2, and end-group double bonds can be used for preparing a high-molecular surfactant by a polymerization reaction.

The invention belongs to the technical field of ion exchange membranes, and relates to a nonionic hydrophilic side-chain polybenzimidazole (PBI) membrane and a preparation method thereof. The method is completed by the steps of deprotonation of PBI, nucleophilic substitution, membrane formation, acid absorption and the like. The nonionic hydrophilic side chain induces the formation of a microscopic phase separation structure and hydrophilic nano channels in the membrane; and as an effective proton transfer path, the hydrophilic nano channels obviously enhance the proton conductivity of the membrane. Meanwhile, due to the moderate pore size of the hydrophilic nano channels and the Donnan effect of the protonated PBI, the vanadium ion permeability of the membrane is low. In addition, no ion-exchange group is introduced, so the grafted PBI membrane maintains favorable chemical stability of the original PBI membrane in an all-vanadium redox flow battery. The nonionic hydrophilic side-chainPBI membrane has favorable comprehensive properties, i.e., has superhigh proton conductivity, high ion permselectivity and favorable chemical stability.

The invention relates to a novel method for preparing a p-aramid nanofiber solution, belongs to the field of macromolecules and also belongs to the field of nano-materials. According to the solution, p-aramid nanofibers have the diameter of 20-50nm and the length of about 10 microns. The method comprises the steps: purging a dry three-mouthed bottle with nitrogen gas for 10 minutes under the protection of nitrogen gas, adding a deprotonation reagent (sodium hydride or potassium hydride or lithium hydride) and anhydrous dimethyl sulfoxide under the protection of nitrogen gas, mechanically stirring, heating to the temperature of 70 DEG C within 20 minutes, continuously reacting for 40 minutes, and then, cooling to the temperature of 30 DEG C; and then, slowly adding poly-p-phenylene terephthalamide staple fibers, and reacting for 6-72 hours at the temperature of 30 DEG C, thereby obtaining an orange-red solution containing the p-aramid nanofibers, wherein the weight percent of the p-aramid nanofibers is 0.05-3.6%. The method disclosed by the invention is simple and is strong in operability, and a feasible method is provided for the low-cost and large-scale preparation of p-aramid nanofiber materials.

The invention discloses a preparation method of aramid nanofiber/mica composite insulating paper. The preparation method of the aramid nanofiber/mica composite insulating paper aims at achieving the self-film-forming coating and interface enhancement effects of aramid nanofibers on mica by turning macro aramid fibers into aramid nanofibers through deprotonation and utilizing an in-situ depositionmethod, achieves that the adaptability of the particle diameter of the mica is wide, and the uniformity, mechanical strength and dielectric strength of the aramid nanofiber/mica composite insulating paper are much higher than the properties of common aramid mica insulating paper, solves the problems of existing aramid mica insulating paper during wet papermaking that (1) the particle diameter of the mica is limited by the properties, (2) the mechanical strength is low, (3) due to voids and pore diameters which are generated by free accumulation and distribution of the mica, the dielectric strength is low, (4) the two faces of paper forming have large difference and low uniformity, is simple in operation, has a significant effect, and provides a novel method for the preparation of a motor insulation material with higher performance.

The present invention provides a photothermographic material containing a non-photosensitive silver salt of an organic acid, a photosensitive silver halide, a reducing agent for silver ions and a binder on one surface of a support, which comprises at least one compound represented by the following formula (I) and at least one compound producing imagewise a chemical species that can form development initiation points on and in the vicinity of the non-photosensitive silver salt of an organic acid: (X)k-(L)m-(A-B)n wherein X represents a silver halide adsorption group or a light absorption group, L represents a (k+n)-valent bridging group, A represents an electron-donating group, B represents a leaving group or a hydrogen atom, A-B is dissociated or deprotonated after oxidation to generate a radical A', k represents 0-3, m represents 0 or 1, and n represents 1 or 2. Thus, there is provided a photothermographic material that shows low fog and high Dmax (maximum density), has photographic characteristics of high sensitivity and high contrast, and shows little increase of fog even if it is stored for a long period of time after development

Disclosed is a release on demand type corrosion inhibitor composition for a metal substrate formed from only non-electrically conductive film forming copolymer(s); a nitrogen containing functional group X, where the group X comprises a pyridine, a dihydropyridine, a pyrrole, an imidazole, or a mixtures thereof; and a metallate anion. The metallate anion binds to a nitrogen in the functional group X by ion pairing. A localized rise in pH is believed to cause release of the anion via a protonation/deprotonation reaction and the released anion suppresses the corrosion formation. The coating composition includes no electrically conductive polymers.

The invention discloses a method for preparing aramid nanofibers by using a mechanical coupling chemical alkali dissolution method. According to the method provided by the invention, fibrillation treatment is coupled with homogenization treatment, so that the size of aramid fibers is greatly reduced before a deprotonation reaction is performed, the specific surface area and surface activity of thearamid fibers are improved, the sub-micron-sized aramid fibers and a KOH/DMSO system are more easily subjected to a rapid deprotonation process, the reaction time is greatly shortened, the reaction concentration is increased, the reaction efficiency is significantly improved, and industrialized production is facilitated; the method has a simple preparation process, realizes short-process preparation and is easy to control; and the prepared aramid nanofibers have a small diameter, good size homogeneity, a large length-diameter ratio, high strength and excellent heat resistance, can be used asa novel construction enhancement unit of construction of macro composite materials, and has broad application prospects in the fields of composite materials, biology, medicine, electronics, energy sources and the like.

The present invention provides a thermally developable photosensitive material including a support, the image-forming layer containing a non-photosensitive organic silver salt, a photosensitive silver halide, a reducing agent, a binder and a compound represented by the following formula (I), wherein after the material is exposed and thermally developed at 121° C. for 24 seconds, at least 90% of the developed silver is in contact with the photosensitive silver halide grains after development;<paragraph lvl="0"><in-line-formula>(X kL mA-B)n Formula (I)</in-line-formula>wherein: X represents a silver halide-adsorbing group or light-absorbing group; L represents a (k+n)-valent linking group; A represents an electron-donating group, B represents a leaving group or a hydrogen atom, and after oxidized, (A-B) is eliminated or deprotonated to form a radical A'; and k falls between 0 and 3; m represents 0 or 1; n represents 1 or 2, but if k=0 and n=1, then m=0.

3-substituted dihydronepetalactone is prepared by deprotonation of nepetalactone and treatment with Grignard reagent to form alkyl and aryl substituted compounds. The compounds so prepared are odorous and have a wide range of utility ranging from insect repellents to fragrance compounds, such as perfumes, among others.

The invention provides an electrochemical CO₂ capture device and methods employing proton-coupled redox active species, e.g., a quinone, phenazine, alloxazine, isoalloxazine, or polyoxometalate, whose protonation and deprotonation can be controlled electrochemically to modify the pH of an aqueous solution or aqueous suspension. This change in pH can be used to sequester and release CO₂. The CO₂ capture device can be used to sequester gaseous CO₂ from a point source, such as flue gas, or from ambient air.

The invention discloses an insulin carrying microsphere. A polyesteramide material of which the side chain contains a carboxyl and a hydrophobic isobutyl group at the same time serves as a carrier, wherein the carboxyl endows entericsolubility to the insulin carrying microsphere. Under a strong-acidity environment of gastric juice, because of deprotonation of the carboxyl, the polyesteramide material is not dissolved, the microsphere has certain contractile effect, and then a protein medicament is protected. Under a neutral condition of a small intestine, because of ionization of the carboxyl, the polyesteramide material is gradually dissolved, the microsphere is corroded, and then the wrapped medicament is released. On the other hand, the hydrophobic isobutyl has the effect of regulatingthe pH sensitivity of the material, the hydrophobicity of the insulin carrying microsphere is improved, and the effect with an intestinal cell membrane is enhanced. Therefore, the insulin carrying microsphere has high pH sensitivity, and the releasing and absorption of the insulin in an intestinal tract can be realized.

The invention relates to a preparation method of a gradient porous metal organic framework ZIF (Zeolitic Imidazolate Framework)-8. The preparation method comprises the following steps of dissolving anorganic ligand 2-methylimidazole in deionized water, after the 2-methylimidazole is thoroughly dissolved, adding a polydiallyl dimethyl ammonium chloride solution, and uniformly agitating; dissolvinga divalent zinc slat in deionized water, thoroughly dissolving, then mixing with an organic ligand solution, and carrying out an agitation reaction to obtain suspension liquid; filtering or centrifugally separating the suspension liquid to obtain a solid product, washing with deionized water, and then drying, so that a ZIF-8 series material is obtained. Due to the control, to deprotonation balance and the growth process of a crystal, of the positive ions of polydiallyl dimethyl quaternary ammonium, the prepared ZIF-8 series material has microporous and mesoporous structures at the same time,further, is adjustable in mesoporous volume and stable in performance, and is wide in application prospect, and the preparation method disclosed by the invention is simple, convenient, easy and feasible, is green and pollution-free and is convenient to industrially operate.