132 results about "Calixarene" patented technology

The invention belongs to the field of organic chemical materials, and relates to a benzimidazolyl deep calixarene cross-linked polymer as well as a preparation method and application thereof in iodine adsorption. According to the method, a chlorine foot in a benzimidazolyl calixarene synthesis technology with a chlorine substituted foot is replaced by an azide foot, and then an azide group and 1, 6-heptadiyne are subjected to a click reaction catalyzed by cuprous. And the insoluble benzimidazolyl deep calixarene cross-linked polymer NCCP-I is prepared in a relatively short reaction time and a relatively high yield. The NCCP-I is non-porous, is an amorphous compact particle with an irregular crystal structure, and has relatively high thermal stability. When the NCCP-I is used for adsorbing iodine vapor, the saturated adsorption capacity reaches 1.36 g.g <-1 >. The method is simple in synthesis path, good in reproducibility and good in stability, can be recycled, provides reliable guarantee for nuclear safety protection and environmental governance, and has great social value and economic value.

The invention provides a crystalline supramolecular polymer based on snap ring aromatic hydrocarbon. The polymer is obtained by self-assembling snap ring aromatic hydrocarbon (CLP) and a naphthalimide derivative (NDI-8) through a subject and an object. The crystalline supramolecular polymer (NDI-8 (at) CLPalpha) can fully utilize the synergistic effect of a plurality of weak interactions, so that the charge transfer interaction between molecules can be remarkably enhanced very easily. The crystalline supramolecular polymer constructed based on charge transfer shows excellent gasochromic performance. The p-xylene in the NDI-8-coated CLPalpha p-xylene isomer has efficient identification and detection capability, the color is changed from purple to light pink, and a wide application prospect is provided for the development of stimuli-responsive materials.

The invention discloses a heteroatom modified intrinsic microporous polymer material, a preparation method and application, and belongs to the technical field of environmental governance, and the preparation method comprises the following steps: (1) preparing nitro-substituted oxygen atom bridged calixarene from cyanuric chloride and nitro-substituted resorcinol in the presence of a basic catalyst; (2) reducing the nitro-substituted oxygen atom bridged calixarene into amino-substituted oxygen atom bridged calixarene; and (3) carrying out a Schiff base polymerization reaction on the amino-substituted oxygen atom bridged calixarene and a polyfunctional aldehyde group under a solvothermal condition to obtain the heteroatom modified intrinsic microporous polymer material. When the adsorbent is used, the adsorbent is directly added into a metal ion solution, the removal rate of dichromate radicals and manganese ions can reach 90% or above, and the adsorbed material can be repeatedly used after being washed by an acidic aqueous solution. And the polymerized material also has high water body stability, and is beneficial to recycling of the material.

The invention provides an electrochemical etching preparation method of a perforated battery copper foil, which comprises the following steps: firstly, pretreating the copper foil, then performing asymmetric bidirectional pulse etching in a specific electrolyte system by taking the copper foil as an anode and a platinum sheet as a cathode, and gradually decreasing the pulse interval time in a gradient manner in the etching process; and after etching is completed, immediately transferring into an ammonia water solution containing a sulfonated modified calixarene supramolecular corrosion inhibitor to stop the reaction, and drying and annealing to obtain the sulfonated modified calixarene supramolecular corrosion inhibitor. By dynamically regulating and controlling the pulse interval time and cooperating with the electrolyte with specific components and the efficient supramolecular corrosion inhibitor, the uniformity and controllability of the etching process are remarkably improved, and the problems that in the prior art, hole distribution is not uniform, excessive etching is likely to happen, the hole shape is irregular, and efficiency is low are solved; the prepared copper foil has the characteristics of uniform and consistent pore structure, smooth pore wall and excellent mechanical property and conductivity, and the application performance and reliability of the copper foil in a high-end lithium ion battery current collector are greatly improved.

The invention provides low-viscosity high-wear-resistance vehicle engine oil and a preparation method thereof, and belongs to the technical field of engine oil. According to the preparation method, an ionic liquid group is introduced through a reaction, a nano interlayer compound is constructed by combining surface modification of a metal-ionic liquid complex and silicon dioxide nanoparticles, and a microcapsule structure is formed through coating of a urea-formaldehyde prepolymer; the ionic liquid group provides a low friction coefficient and thermal stability, the silicon dioxide nanoparticles provide physical isolation and wear-resistant protection, and the microcapsules realize controlled release and dynamic repair of the lubricating components; a skeleton polymer is prepared through a reaction of polyamidoamine and epoxy chloropropane so as to provide abundant active sites, and oxidation resistance is improved through a synergistic effect of the skeleton polymer, hindered phenol and calixarene; by combining oleic acid modified nanoparticles, the dispersity and the wear resistance are enhanced, and meanwhile, dynamic protection is provided on a friction interface; the synergistic effect prolongs the service life of the engine oil and improves the high-temperature stability of the engine oil.

The invention discloses a lithium dihydrogen phosphate preparation method, which comprises: S1, mixing a refined lithium sulfate solution with an extraction agent solution, and carrying out standing layering to obtain an upper layer solution; s2, mixing the upper-layer solution with a detergent, washing, and separating to obtain a washing solution; s3, mixing the washing liquid with a phosphoric acid solution, and standing for layering to obtain a lower-layer solution; s4, mixing the lower-layer solution with a component regulator; and carrying out solid-liquid separation. An extracting agent in the extracting agent solution comprises at least one of benzoyl trifluoroacetone, trialkyl phosphine oxide and sulfonated calixarene. The specific extraction agent efficiently selects lithium ions to separate impurities, lithium dihydrogen phosphate is obtained through direct reverse extraction after washing, lithium dihydrogen phosphate does not need to be converted into other lithium products to prepare lithium dihydrogen phosphate, and the process production period is shortened. In addition, lithium dihydrogen phosphate is prepared through washing and reverse extraction after impurities are efficiently selected and separated through an extraction agent; the purity is high; the battery grade lithium dihydrogen phosphate can be obtained.

The invention provides a rubidium and cesium adsorbent and a preparation method and application thereof. The preparation method comprises the following steps: providing a doped and modified Prussian blue analogue, wherein the Prussian blue analogue comprises a Prussian blue matrix material and a transition metal doping element doped in the Prussian blue matrix material; granulating a mixed material containing the doped and modified prussian blue analogue and a granulating agent to obtain a rubidium and cesium adsorbent precursor; a mixed reaction system containing the rubidium and cesium adsorbent precursor and a surface modifier are subjected to a reaction, the surface modifier contains one or more functional structures of an amino group, a sulfonic group, a carboxyl group, a sulfydryl group, an acryloyloxy group, an epoxy group, a crown ether structure and a calixarene structure, and therefore the rubidium and cesium adsorbent is obtained. Through a multi-aspect synergistic strategy of transition metal doping, granulation and surface modification, the prepared rubidium and cesium adsorbent has good stability and high adsorption capacity, and has strong selectivity to Cs < + > / Rb < + >.

The invention relates to the technical field of epoxy resin coatings, in particular to a radiation-resistant self-repairing epoxy resin coating and a preparation method thereof. The radiation-resistant self-repairing epoxy resin coating comprises the following raw materials: a component A, a component B and a component C, wherein the mass ratio of the component A to the component B to the component C is (50-70): (40-50): (10-20); the component A comprises the following raw materials in parts by mass: 50-60 parts of bisphenol F epoxy resin, 8-12 parts of calix [5] arene, 1-2 parts of zinc acetylacetonate and 15-20 parts of a solvent; the component B is prepared from the following raw materials in parts by mass: 30 to 40 parts of octamethylcyclotetrasiloxane, 5 to 10 parts of gamma-aminopropyltriethoxysilane, 1 to 3 parts of vanillin, 0.5 to 1 part of a catalyst and 0.1 to 0.3 part of p-toluenesulfonic acid; and the component C is an amine curing agent.

The invention belongs to the technical field of pesticides, and particularly relates to azobenzene calix [4] arene derivatives as well as a preparation method and application thereof. The invention discloses a novel azobenzene calix [4] arene derivative prepared by directional modification through an azo reduction reaction based on a calix [4] arene skeleton. The azobenzene calix [4] arene derivative has the characteristics of green environmental protection, accurate and controllable structure and efficient synthesis. After the derivative and a pesticide form a host-guest compound, the activity of the pesticide can be remarkably improved, the bioavailability of the pesticide at an action site is increased, the problem of low efficiency of the traditional pesticide is effectively solved, and the development of target drug resistance is delayed. The technology breaks through the technical bottleneck of nano-carrier environmental toxicity, provides a new thought for developing a multi-target and low-environmental-risk pesticide synergist, and has important significance for realizing pesticide decrement, synergism and resistance treatment.

The invention provides a polycarboxylate superplasticizer as well as a preparation method and application thereof, and belongs to the technical field of concrete admixtures. The polycarboxylate superplasticizer is prepared from the following raw materials: 100 parts of unsaturated polyether, 11 to 22 parts of diphosphonic acid ester, 17 to 65 parts of unsaturated phosphonated calix [n] arene, 6 to 12 parts of monounsaturated carboxylic acid, 2.5 to 8 parts of initiator and 1.5 to 6 parts of chain transfer agent, the molecular weight of the polycarboxylic acid water reducing agent is 8000 to 15000; the diphosphonic acid ester is an ester compound containing two phosphonate radicals; the unsaturated phosphonic calix [n] arene is a derivative of the phosphonic calix [n] arene. The obtained water reducing agent is good in viscosity reduction effect, the viscosity of the ultra-high performance concrete can be efficiently reduced when the water-binder ratio is 0.12-0.14, the fluidity is improved, the working effect of the ultra-high performance concrete is improved, and shrinkage of the ultra-high performance concrete is reduced to a certain extent.

The invention relates to the technical field of adsorption materials, and provides an imprinted porous polymer adsorption material as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking rubidium ions as template ions and nano TiO2 / Fe3O4 as a composite carrier, carrying out silanization surface modification, coordinating crown ether-calixarene as a united functional monomer with the template ions, carrying out polymerization reaction through a cross-linking agent and an initiator to prepare a porous polymer, and eluting the template ions to obtain the imprinted porous polymer adsorption material. The imprinted porous polymer adsorption material provided by the invention can perform efficient selective adsorption on rubidium ions, is high in adsorption capacity and good in stability, and can realize efficient separation and enrichment of rubidium in a complex system. Meanwhile, the adsorption material can be recycled under the action of an external magnetic field, and rapid separation between the adsorbent and an adsorbed solution is achieved.

The invention belongs to the technical field of nano inorganic filler surface modification, and discloses modified nano calcium carbonate which is prepared by the following steps: reacting a nano calcium carbonate raw material with a compound modifier at 70-80 DEG C, and drying, crushing and grading after the reaction is completed, wherein the compound modifier is composed of a component A and a component B in a molar ratio of 1: (1.2-2.0); the component A is selected from p-sulfo calix [n] arene or salt thereof, and n is an integer from 4 to 8; and the component B is selected from epoxy group modified polyisoprene. According to the present invention, the modification formula of mixing the sulfonic acid calixarene compound and the epoxy group modified polyisoprene is used, the molar ratio of the two components is precisely regulated and controlled, and the exposure ratio of the active hydroxyl group in the system is reasonably controlled, such that the modification formula can be used for the modification of the nano calcium carbonate, the modified nano calcium carbonate can effectively improve the impact strength and thixotropy of the base coat and reduce the viscosity of the base coat, and finally, adaptive balance between the thixotropy and the processing fluidity is achieved.

The invention discloses a chiral phenol calix [4] aryl porous organic molecular cage material as well as a preparation method and application thereof. A chiral calix [4] arene raceme and an acyl chloride chiral auxiliary agent are used as initial raw materials to react to prepare a pair of diastereoisomers, gram-grade separation is achieved through silica gel column chromatography, then the chiral auxiliary agent is removed respectively, and the single enantiomer chiral phenol calix [4] arene compound with the ee value being 99.9% or above can be obtained. The preparation method comprises the following steps of: synthesizing tetraaldehyde chiral phenol calix [4] arene by introducing an aldehyde group unit on the tetraaldehyde chiral phenol calix [4] arene through Duff reaction, and assembling the tetraaldehyde chiral phenol calix [4] arene serving as a construction element with a polyamino organic synthesizer to prepare the chiral phenol calix [4] arene porous organic cage with a larger cavity. The preparation method of the chiral porous organic cage does not need a catalyst, the preparation process is simple, operation is easy and convenient, expansibility is good, the yield is high, and the prepared chiral molecular cage is large in cavity, large in specific surface area and good in repeatability and can be used for chiral recognition and gas adsorption.

A liquid composition that is an aqueous liquid composition that emits light when irradiated with ultraviolet light contains a resin particle, the resin particle containing a unit that has a polar group and containing a complex composed of a sulfur-bridged calixarene and a lanthanoid ion, the polar group being at least one selected from the group consisting of an ester group, a carboxy group, a hydroxy group, an ether group, an amino group, an amide group and a cyano group.

A skin-care product composition and a pharmaceutical composition for treating skin inflammatory diseases, comprising a sulfonated calixarene compound represented by formula (I) and a skin-care active substance, and new use thereof in skin care and / or treatment of skin inflammatory diseases, wherein R, M and n are as defined in the description.

The invention discloses a preparation method and application of a metal-organic dye adsorbent based on sulfonyl calixarene, Ni (II) is used as a metal node, and the metal-organic dye adsorbent is prepared through a solvothermal directional assembly strategy by utilizing the synergistic coordination effect of a dicarboxylic acid ligand 4, 4 '-dithiobisbenzoic acid and p-tert-butylsulfonyl calix [4] arene (H4TBSC). The sulfonyl calixarene-based structure metal-organic dye adsorbent with definite inner and outer cavity partitions is successfully constructed. The adsorption material comprises a central large cavity and two symmetrically distributed peripheral cavities, and the special structure enables the adsorption material to show excellent selective adsorption performance on Congo red (CR) dye molecules. And efficient separation of a Congo red / rhodamine B (RhB) mixed system can be realized through a molecular size screening effect. The invention provides a new thought and method for developing a multifunctional supramolecular adsorption material based on dynamic coordination engineering, and has a wide application prospect in the fields of dye separation and wastewater treatment.

The invention discloses a method for preparing lithium carbonate from aluminum electrolyte waste residues, which comprises the following steps: adding an organic solvent into a leachate obtained by roasting the aluminum electrolyte waste residues to realize supersaturated precipitation of sodium sulfate and retention of lithium sulfate, and pre-separating impurity sodium ions; then adding a calixarene chelating agent to be complexed with sodium ions, and removing the sodium ions; then a nonionic surfactant is introduced to regulate and control the solvent microenvironment, the polarity, solvation ability and surface tension of the solution are changed, effective contact between the calixarene chelating agent and sodium ions is promoted, and the chelating efficiency is improved; finally, the high-purity lithium carbonate for battery manufacturing is prepared through a carbonization and crystallization step. The synergistic application of calixarene and the surfactant is used for extracting lithium from the aluminum electrolyte waste residues for the first time, the problems of sodium-lithium separation and low recovery rate of a low-concentration lithium ion solution in an aqueous solution system are effectively solved, and the method has the advantages of being environmentally friendly, efficient, high in product purity and high in lithium recovery rate.

The invention belongs to the technical field of pharmaceutical chemistry, radiopharmaceutical chemistry and clinical nuclear medicine, and particularly relates to a rotaxane protection-based radioactive halogen labeled compound as well as a preparation method and application thereof. A rotaxane protection-based radioactive halogen labeled compound comprises: a macrocyclic compound having a cavity, the macrocyclic compound comprising one of cyclodextrin, cucurbituril, calixarene and pillararene; a radioactive halogen-labeled compound: the radioactive halogen-labeled position is located in the cavity of the macrocyclic compound; and the end-capping group is positioned at the opening end of the cavity, is connected to two ends of the radioactive halogen-labeled compound and is used for preventing the radioactive halogen-labeled compound from sliding out of the cavity. The rotaxane protection-based radioactive halogen labeled compound provided by the invention has good in-vivo stability, and solves the problem of poor in-vivo stability caused by dissociation of radioactive halogen and a tracer agent in the existing radioactive halogen labeled compound.

A process for the hydrocyanation of an organic compound containing at least one olefinic group comprising reacting the organic compound with hydrogen cyanide in the presence of a catalyst complex comprising at least one transition metal and a phosphorus-containing ligand comprising a calixarene backbone and at least two aryl phosphite or aryl phosphoramidite groups chemically bonded to the backbone.

The invention discloses an intrinsic micropore degradable polymer material based on biomass and hetero-calixarene and a preparation method and application thereof.The method comprises the steps that firstly, cyanuric chloride and resorcinol serve as raw materials, and oxygen atom bridged hetero-calixarene macrocyclic molecules are synthesized in one step under the alkaline condition through a one-pot method; then introducing the lignin derivative into oxygen atom bridged hetero calixarene by utilizing an aromatic nucleophilic substitution reaction on a triazine ring in a macrocyclic molecule, and carrying out a condensation reaction on the obtained multi-aldehyde functionalized oxygen atom bridged hetero calixarene and polyfunctional mercaptan under an acidic condition to obtain the target degradable polymer material. When in use, the material is directly put into an aqueous solution of elemental iodine, iodine negative ions and divalent mercury ions for adsorption. The removal rate of the material to low-concentration iodine simple substances, iodine negative ions and divalent mercury ions can reach 90% or above, and the material after adsorption can be repeatedly used after being washed by an acidic aqueous solution. The material can be degraded under an alkaline condition.

The invention discloses a sulfonated calix [4] arene derivative and application thereof in resisting I-type herpes simplex virus (HSV-1), and belongs to the field of biological medicine. The invention relates to a sulfonated calix [4] arene derivative, which has a structural general formula as follows: R is equal to The preparation method comprises the following steps: adding sodium hydride into a raw material C4A in a polar aprotic solvent to react with alkyl halide to obtain a C4AH or C4AD intermediate; and reacting the intermediate with chlorosulfonic acid in a chlorine-containing solvent, and adding an alkaline alcohol solvent for treatment to obtain the sulfonated calix [4] arene derivative. The calix [4] arene derivative has a relatively good inhibition rate on expression of HSV-1gB and gD genes, and does not have obvious cytotoxicity.

The invention relates to the technical field of membrane separation, in particular to a composite membrane based on deep-cavity calixarene and a preparation method and application thereof. According to the composite membrane based on the deep-cavity calixarene, the nanofiltration composite membrane for antibiotic desalination is constructed by taking the deep-cavity calixarene as a water-phase monomer, and the composite membrane has the following advantages that the molecular size is large, the diffusion speed of the monomer to an interface can be reduced, and the controllability of an interface polymerization process is improved; rich alcoholic hydroxyl groups with low reaction activity are contained, so that the interfacial polymerization rate can be reduced, and the polymerization degree can be better regulated and controlled; the molecular structure is more distorted, the non-coplanarity of molecules is high, the free volume of the separation layer can be increased, and the looseness of the separation layer structure is improved; the drug recognition capability and the supramolecular cavity structure are more beneficial to improvement of selectivity and flux in the antibiotic desalting process. The test result shows that the composite membrane provided by the invention has excellent desalting performance on antibiotics and excellent stability.

The invention relates to the technical field of metal material protection, in particular to a surface rust-proof treatment method for a stator punching sheet, which comprises the following steps: performing plasma treatment by using argon-hydrogen mixed gas to form a nano rough structure, and immersing into simulated body fluid to form a biomimetic mineralization coating film; the preparation method comprises the following steps: carrying out supramolecular self-assembly on calixarene derivatives and beta-cyclodextrin, and then coating a gradient composite coating containing zinc-aluminum powder primer, a carbon nanotube transition layer and MXene finish paint; and finally, an organic silicon hole sealing agent containing azobenzene is sprayed, ultraviolet irradiation is carried out, a photoresponse self-cleaning layer is formed, and regulation and control processes such as microwaves and magnetic fields are adopted in all the steps. According to the method, a gradient composite protection layer and a light response self-cleaning system are constructed through cooperation of multiple technologies such as plasma, biomimetic mineralization and supramolecular self-assembly; the anti-rust performance of the stator punching sheet is remarkably improved, the salt spray test duration is longer than 2000 hours, the stator punching sheet has the characteristics of environmental protection and high efficiency, and the upgrading of a motor manufacturing technology is promoted.

This application relates to a polyimide film, its preparation method, and its application, falling within the field of polymer film preparation technology. The preparation method includes: dissolving calix[n]aromatics, monoacyl chloride monomers, and diacyl chloride monomers in an organic solvent at a specific molar ratio to form a hyperbranched structure; adding a diamine monomer to generate an amino-terminated hyperbranched structure; then adding a dianhydride monomer and a diacyl chloride monomer to obtain a polyamic acid solution; and finally, chemical imidization and film-forming treatment to obtain a polyimide film. This application effectively solves the problem that existing polyimide films struggle to simultaneously possess excellent bending resistance and creep resistance, significantly improving the film's applicability in the field of flexible displays.

The invention relates to the technical field of high-performance textile composite materials, in particular to a novel anti-wear curtain fabric and a preparation method thereof. The preparation method comprises the following steps: carrying out surface modification on nano aluminum oxide by virtue of a biomimetic mineralization technology, and constructing an organic-inorganic hybrid layer on the surface of nano particles by virtue of a dopamine-alginic acid composite system; adopting a supramolecular assembly technology to enable calixarene derivatives and cyanate ester resin to form a host-guest compound system; a silicon carbide fiber reinforced composite material base material is prepared through innovative processes such as photo-thermal dual curing and electric field assisted hot-pressing curing; and finally, constructing a gradient ceramic protection system on the surface of the base material by adopting surface treatment technologies such as a laser micro-texturing technology, a magnetron sputtering and plasma spraying composite technology, plasma enhanced chemical vapor deposition and the like. The prepared curtain fabric has the advantages of wear resistance, flame retardance and the like, and the technical problems that a traditional curtain fabric is poor in wear resistance, insufficient in flame retardance and short in service life are solved.

This invention provides a macrocyclic compound and its applications, a precursor for a processing-free thermal image containing the macrocyclic compound, and a processing-free thermal image and its applications. The macrocyclic compound is a product obtained by amine esterification of resorcinol calixarenes (CR) and isocyanate acrylate (ICA). Because the macrocyclic compound contains calixarenes, its macrocyclic cavity can encapsulate infrared absorbers and thermal initiators. Furthermore, the macrocyclic compound contains highly polar amine-activated double bonds, exhibiting high thermosensitive crosslinking activity, and can undergo crosslinking reactions with other components in the imaging layer to form a three-dimensional crosslinked structure, thereby solving the surface migration problem of infrared absorbers and thermal initiators in the imaging layer. In addition, the macrocyclic compound contains highly polar telechelic amine-activated allyl groups, exhibiting high thermosensitive crosslinking activity and abrasion resistance, effectively improving the imaging performance of the processing-free thermal image.

This application relates to the field of polishing slurry technology, and in particular to cerium oxide polishing slurry, its preparation method and application. The cerium oxide polishing slurry includes a solvent and a solute. The solvent includes water, and the solute includes cerium oxide, 4-sulfonylcalix[6]arene, sodium 2,3-dihydroxynaphthalene-6-sulfonate, a lubricant, a zwitterionic dispersant and a pH adjuster. In the cerium oxide polishing slurry, the mass percentage of cerium oxide is 4.0%~13.0%, the mass percentage of 4-sulfonylcalix[6]arene is 0.3%~1.3%, the mass percentage of sodium 2,3-dihydroxynaphthalene-6-sulfonate is 0.1%~1.0%, the mass percentage of lubricant is 0.1%~0.55%, and the mass percentage of zwitterionic dispersant is 0.3%~1.3%. The pH value of the cerium oxide polishing slurry is 3.8~4.2. Using the cerium oxide polishing slurry provided in this application reduces the formation of Ce-Si-O that is difficult to clean during the polishing process and improves the cleaning yield and stability after polishing.

A calix[4]arenes of the formula (1a),wherein: Y1, Y2, Y3 and Y4 are selected from hydrogen, halogen, NO2, N3, CN, CHO, COOR′, CONR″2, NR2, triazole moiety and C1-C3-alkyl group, the C1-C3-alkyl group being optionally substituted, Z is a heterocyclic moiety which is selected from the group including of imidazole, benzimidazole, benzothiazole, benzoxazole, purine, tetrazine, oxazole, pyrazole and thiazole, the heterocyclic moiety being optionally substituted, R1 and R2 are selected from hydrogen and C1-C8-alkyl, the C1-C8-alkyl group being optionally substituted, n being an integer between 1 and 4, They exhibit high cytotoxicity against cancer cells.

To provide a hematoxylin formulation comprising racemic hematoxylin.SOLUTION: A first aspect of the present disclosure is a hematoxylin formulation including racemic hematoxylin and at least one additive (e.g., at least one additive selected from a solvent, a chemical oxidant, a mordant, a stabilizer, and an antioxidant). Another aspect is a method for staining a biological sample, comprising contacting the biological sample with a racemic hematoxylin formulation. In some embodiments, the racemic hematoxylin formulation includes a solvent, hematoxylin, an amount of a chemical oxidant sufficient to convert at least a portion of the hematoxylin into hematein, a mordant, an antioxidant, and a stabilizer. In some embodiments, the stabilizer is selected from the group consisting of a polysaccharide, a cryptand, a cryptophane, a cavitand, a crown ether, a dendrimer, a nanotube, a calixarene, a valinomycin, and a nigericin.SELECTED DRAWING: None

The present invention belongs to the technical field of oil and gas recovery, and provides a silicon-based adsorbent for oil and gas recovery and a preparation method thereof. First, calix[4]arene reacts with 4-bromomethylpyridine and chloromethyl(diphenyl)phosphine to obtain phosphine-calix[4]arene, and then reacts with 3-chloropropyltriethoxysilane and zinc chloride to obtain metal-coordinated calix[4]arene; secondly, choline chloride, glycerol, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, glycidyl acrylate and nickel ion-containing solution are mixed, and N,N-methylenebisacrylamide and azobisisobutyronitrile are introduced for reaction to obtain an ionic liquid mixture; the porous silicon material is immersed in the metal-coordinated calix[4]arene solution and the ionic liquid mixture to prepare a multifunctional composite silicon-based adsorbent to solve the problem that traditional adsorbents are prone to failure under high temperature or complex working conditions.