139 results about "Rhodamines" patented technology

A system for the synthesis of a cost-effective photocatalyst based on the FeOOH / CuBi2O4 heterostructure, consisting of: a) a CuBi2O4 synthesis plant for the production of CuBi2O4 (CBO) microspheres from Bi(NO3)3·6H2O and Cu(NO3)2.3H2O precursors; b) a heterostructure formation unit is configured to deposit FeOOH nanoparticles onto an outer surface of the CBO microspheres to form an FeOOH / CBO heterostructure; and c) a processing unit configured to wash and dry the FeOOH / CBO heterostructure to obtain the photocatalyst.

The invention discloses a polyacid-based metal viologen framework crystalline material as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalytic materials. The crystalline material is synthesized in one step through a hydrothermal method, the molecular formula is Cu2 (H2O) 2 (L) 2 [PW12O40] [OH]. 2H2O, the crystalline material belongs to a monoclinic system, the space group is P21, the cell parameters are alpha = 90 degrees, beta = 114.208 (2) degrees and gamma = 90 degrees, and the structure of the crystalline material is determined through X-ray diffraction. According to the material, accurate compounding of polyacid clusters and metal viologen on the molecular level is achieved, an effective electron transmission channel is constructed, separation of photon-generated carriers is remarkably promoted, and excellent photocatalytic activity is shown. At the ambient temperature, the crystalline material can be used as a catalyst to efficiently degrade dye pollutants (such as methylene blue and rhodamine B) in a water body, the degradation rate within 60 minutes exceeds 90%, and the crystalline material has good cycle stability and structural durability.

This invention provides a composite aerogel based on Eucommia ulmoides gum and MXene nanosheets, its preparation method, and its application. The aerogel is prepared by reacting a toluene solution of Eucommia ulmoides gum with Ti3C2T... x MXene aqueous solution was mixed and a water-in-oil microemulsion was formed using a combination of ultrasound-assisted shaking. This allowed MXene nanosheets to self-assemble at the microemulsion droplet interface. Following vertical freezing and freeze-drying processes, a three-dimensional network structure of Eucommia ulmoides gum-Ti3C2T was successfully constructed. x MXene composite aerogel. The preparation method of this invention is mild and requires no chemical cross-linking agents. The resulting composite aerogel exhibits excellent adsorption performance for enrofloxacin, malachite green, Congo red, rhodamine, and kanamycin in water, with adsorption equilibrium times all within 10 minutes, enabling rapid removal of organic pollutants from water. This invention provides a new approach for the high-value utilization of Eucommia ulmoides gum and has promising application prospects in the field of water environment remediation.

The invention discloses a mixed valence copper doped bismuth vanadate nanodisk photocatalyst and a preparation method and application thereof, a main body of the catalyst is a bismuth vanadate nanodisk, copper is doped in the bismuth vanadate nanodisk, and the copper is composed of Cu < + > and Cu < 2 + >; the catalyst has the characteristics of high stability, simplicity in implementation, high universality and the like. The doped copper ions not only can improve the light absorption capacity of the bismuth vanadate material, but also can promote the rapid separation of photo-induced electrons and holes of the bismuth vanadate material by virtue of the mixed valence state of the copper ions, and improve the carrier dynamics on the material, so that the photocatalytic efficiency of the bismuth vanadate material is improved. The bismuth vanadate photocatalyst doped with the copper ions in the mixed valence state has an efficient photocatalytic degradation effect on pollutants such as rhodamine B and the like, and has a wide application prospect in the technical aspects of environmental pollutant degradation and green advanced oxidation.

The invention discloses Cu / CuO / Ag nano-particles and a preparation method and application thereof, and the method successfully prepares the Cu / CuO / Ag nano-particles with regular morphology and uniform dispersion by optimizing a dual-stabilizer system and a step-by-step reduction-replacement process. The material has dual functions of SERS enhancement and catalysis: as an SERS substrate, the enhancement factor of rhodamine 6G reaches 5.3 * 10 < 8 >, the detection limit is as low as 5.0 * 10 <-13 > mol / L, and the reproducibility is good (RSD = 6.2%); meanwhile, as a catalyst for hydrazinolysis and reduction reaction, by optimizing a reaction solvent and the pH value of a system, the reaction efficiency is remarkably improved, and an additional incubation step is not needed. The detection limit on the plasticizer DOTP can reach 2.0 * 10 <-9 > mol / L, and the method has the advantages of simplicity and convenience in operation, good reproducibility, high analysis speed and the like, and is suitable for rapid screening and quantitative analysis of plasticizers in food packaging, environmental water bodies and medical instruments.

The application relates to a surface enhanced Raman detection technology, in particular to a spherical composite SERS substrate and a preparation method and application thereof. The method comprises the following steps: adopting a micro flow injection pump to drop a solution containing silver nanowires and gold nanorods into liquid nitrogen, and then performing freeze drying; wherein, a gun head of the micro flow injection pump is a hydrophobic gun head; the concentration of the silver nanowires in the solution containing the silver nanowires and the gold nanorods is 15-40 mg / mL. The spherical composite SERS substrate prepared by the method has a spherical structure formed by silver nanowires and metal nanorods, the spherical skeleton structure is formed by interweaving silver nanowires into a net, and the metal nanorods are loaded on the silver nanowires, and the spherical composite SERS substrate can realize detection of rhodamine 6G without introducing a modifier.

The application provides a polyimide photocatalytic fiber and a preparation method and application thereof, and the polyimide photocatalytic fiber comprises a polyimide fiber and photocatalytic polyimide loaded on the surface of the polyimide fiber; in the application, the photocatalytic polyimide is loaded on the surface of the polyimide fiber, the problem that the polyimide fiber does not have photocatalytic function is solved, the affinity between the two is high, and problems such as peeling and falling of the photocatalytic material do not occur; the stability and durability of the photocatalytic fiber are improved; under the premise that the mechanical properties of the fiber are not affected, the photocatalytic fiber has excellent photocatalytic effect and high degradation efficiency on photodegradable compounds, such as rhodamine.

The invention discloses a porphyrin-Fe < 3 + > complex nanowire as well as a preparation method and application thereof. The nanowire is prepared by the following steps: dissolving FeCl3. 6H2O and 5, 10, 15, 20-tetra (4-carboxyl phenyl) porphin into a mixed solvent of absolute ethyl alcohol and N, N-dimethylformamide, and carrying out ultrasonic treatment to obtain a mixed solution; performing solvothermal reaction on the mixed solution in a high-pressure reaction kettle, naturally cooling to room temperature after the reaction is finished, and performing centrifugal separation to obtain a solid product, namely the porphyrin-Fe < 3 + > complex nanowire. The porphyrin-Fe < 3 + > complex nanowire provided by the invention has the advantages of large specific surface area, better conductivity and rich carboxyl groups, monodisperse metal nodes and delocalized macrocyclic conjugated structures on the surface, and can be used for photocatalytic degradation of rhodamine 6G dye.

The invention discloses a conductive hydrogel preparation method based on a photocuring 3D printing technology. The photocurable conductive hydrogel is prepared by preparing conductive hydrogel printing ink and utilizing a photocuring 3D printing technology. The preparation method comprises the steps that conductive hydrogel is prepared through two steps of conductive hydrogel printing ink preparation and photocuring 3D printing, the printing ink is prepared from acrylamide, deionized water, glycerol, poly (ethylene glycol) diacrylate, a photoinitiator 819, rhodamine B, magnesium chloride and sodium chloride, the material cost is low, and the preparation process is simple; the printing ink is prepared into the conductive hydrogel in a photocuring 3D printing mode. And a resistance signal detection circuit is used for detecting a resistance signal. The prepared conductive hydrogel can be applied to the fields of wearable equipment, robots and the like.

The application belongs to the technical field of ion detection, and particularly relates to a preparation method of a rapid detection uranyl ion ratio type fluorescent probe, comprising the following steps: dissolving rhodamine B and phosphorus oxychloride in 1,2-dichloroethane to obtain product 1; dissolving the product 1 in acetonitrile, adding 2-aminobenzimidazole and triethylamine, and stirring under heating; after the reaction is completed, column chromatography purification is carried out, and vacuum drying is carried out to obtain the target product fluorescent probe RBN; and the fluorescent probe RBN is dissolved in DMSO to prepare a mother liquor. The fluorescent probe has the advantages of rapid response to uranyl ions, simple synthesis route, simple detection equipment and method, and the like, and can be used for qualitative and quantitative detection of uranyl ions in an environment and a biological system.

The application belongs to the field of organic chemistry, material science and corrosion engineering, and discloses synthesis and application of a corrosion inhibitor based on rhodamine 6G. The fluorescent corrosion inhibitor LDS is obtained by synthesizing rhodamine 6G and hydrazine hydrate through a Schiff base reaction and salicylaldehyde. The corrosion inhibitor LDS not only has an inhibiting effect on carbon steel, but also can realize detection functions of corrosion iron ions and environment pH through a fluorescent signal, and further early warning of metal corrosion.

The invention belongs to the technical field of coatings, and particularly relates to an anticorrosive coating based on a ferric ion fluorescent probe as well as a preparation method and application of the anticorrosive coating. The ferric ion-based fluorescent probe takes mesoporous CeO2 microspheres as a core, rhodamine-ethylenediamine fluorescent molecules are loaded in mesopores of the CeO2 microspheres, and the surfaces of the mesoporous CeO2 microspheres are sequentially coated with a chitosan layer, a sodium alginate layer and a chitosan layer. The fluorescent probe based on the ferric ions not only has corrosion resistance, but also has monitoring and early warning functions on the corrosion process. The anti-corrosion coating prepared by applying the anti-corrosion coating material synchronously integrates the three functions of corrosion early warning, damage self-repairing and long-acting corrosion prevention, breaks through the bottleneck that in the prior art, only single or partial functions can be achieved, and multi-function collaborative integration cannot be achieved, and overcomes the key defects that a traditional intelligent coating is single in function, lagged in response and short in protection service life.

The application discloses a kind of stable crystal form photocatalyst and its preparation method, application, belong to photocatalyst technical field, the catalyst is 1-ethyl-3-methyl imidazole tetrafluoroborate ion liquid assisted La doped TiO2 Photocatalyst, La doping ratio 0.12-0.13%, ion liquid content 12-13 mL / mg.It is prepared using sol-gel method, by precisely controlling A, B liquid ratio and 595-605 DEG C, 1.8-2.2h calcination process, realize lattice defect controllable and crystal form stable.When applied, the mass ratio of catalyst and rhodamine B is 99-101:1, and rhodamine B in wastewater can be efficiently degraded under illumination for ≥80 min, with a degradation rate of ≥92%.The degradation rate is still ≥88% after being reused for 5 times.The catalyst has stable crystal form, high photocatalytic efficiency, environmental protection and economy, and is suitable for treating wastewater containing rhodamine B in multiple industries.

The invention relates to the technical field of biosensing, and discloses a pH / viscosity double-lock activated afterglow luminescent small molecule probe as well as a preparation method and application thereof. The structural formula of the afterglow luminescent small-molecule probe is shown in the specification. A rhodamine light-emitting unit and an afterglow light-emitting matrix unit SO are covalently connected through a chemical bond. The luminescent mechanism is as follows: under illumination, molecules generate singlet oxygen to oxidize and activate adjacent SO units, so that active oxygen mediated afterglow luminescence is generated. The afterglow luminescent small-molecule probe has a double-lock activation characteristic, that is, a strong afterglow signal can be generated only when a subacid environment and a high-viscosity condition are met at the same time. And the signal is weak under a single condition or a normal physiological environment. The probe provided by the invention has excellent environmental specificity and high signal-to-noise ratio imaging capability, and provides a powerful tool for realizing accurate imaging in a complex biological system.

The invention provides a Motixazotide-nitrogen mustard conjugate and a preparation method and application of a fluorescent probe of the Motixazotide-nitrogen mustard conjugate, and belongs to the field of polypeptide preparation and biological medicine. According to the present invention, a solid phase polypeptide synthesis method is adopted to covalently link a DNA alkylation reagent nitrogen mustard and a CXCR4 targeting peptide Motixazotide, and further couple with a fluorescent dye so as to successfully prepare a series of novel conjugates and fluorescent probes thereof; experiments prove that the Motixazotide-nitrogen mustard conjugate and the fluorescent probe thereof prepared by the invention can be used for remarkably improving the anti-tumor activity of nitrogen mustard and the targeting property of the nitrogen mustard to tumor cells. Meanwhile, the rhodamine B labeled dinitrogen mustard conjugate BCCR has a specific targeting effect on a CXCR4 receptor and a dual targeting effect on a tumor cell nucleus. The conjugate realizes real-time tracing of the whole process of tumor targeting, cell delivery and nuclear localization, and provides a powerful tool for curative effect evaluation and mechanism research, so that the conjugate has good clinical transformation prospect and application value.

The present application relates to the technical field of organic compound reagent, specifically relates to a silicon-based rhodamine compound and a preparation method thereof, fluorescent modified nucleotide and kit, wherein the fluorescent modified nucleotide can be applied to the nucleic acid sequencing reaction of sequencing by synthesis. The present application creatively improves -COR 11 The connection structure between the fluorescent compound dye core structure adopts a heteroalkyl structure containing dioxygen -O-(CH2) m -O-(CH2) n -COR 11 As the connection structure, the connecting group -COR The silicon-based rhodamine compound is connected to the fluorescent compound core structure, and the fluorescence stability, fluorescence intensity and incorporation efficiency of the modified nucleotide formed by the silicon-based rhodamine compound as a modified molecule used in the nucleic acid sequencing reaction are improved.

The application provides a spherical lignin-phenolic resin and a preparation method and application thereof in adsorbing N-containing organic dyes, and belongs to the technical field of adsorbing materials. The lignin-phenolic resin with regular spherical morphology is prepared by one-step condensation polymerization reaction through the reverse suspension polymerization method under acid catalysis, wherein lignin, hydroquinone and trioxane are used as raw materials. The lignin belongs to renewable resources, has the characteristics of low cost and environmental friendliness, can replace phenol as the main phenol source, and the replacement rate can reach 75%. The yield of the synthesized phenolic resin is as high as 60-80%. In addition, the monomer type can be selected to introduce rich phenolic hydroxyl groups, sulfonic acid groups and other oxygen-containing groups in the resin, the monomer ratio is controlled to change the crosslinking structure of the resin, the adsorption capacity of the resin for N-containing organic dyes is effectively improved, and efficient adsorption of rhodamine B and methylene blue can be realized.

The invention discloses a fluorescent probe for recognizing lithium ions and a preparation method and application thereof.The method comprises the steps that rhodamine B, HATU and methyl 3-amino-3-methyl-1-butyrate are mixed and subjected to a first-step reaction, a first reactant is obtained, the first reactant, ethyl alcohol and sodium hydroxide are mixed and subjected to a second-step reaction, a second reactant is obtained and subjected to a third-step reaction, and the fluorescent probe for recognizing the lithium ions is obtained. And mixing the second reactant, crown ether, EDCI and HOBT, and carrying out a third-step reaction to obtain the fluorescent probe. According to the method, lithium ions in a complex environment can be efficiently recognized, and raw material waste and resource loss in the production process are avoided.

This invention discloses a method for preparing an h-BN / Fe-ZnO / g-C3N4 composite photocatalyst. The preparation method includes the following steps: first, mixing an iron source and zinc acetate dihydrate, titrating with an alkaline solution, filtering, washing, vacuum drying, and grinding to obtain a Fe-ZnO precursor; then mixing the Fe-ZnO precursor with urea, h-BN, and ascorbic acid in a covered alumina crucible and calcining in a muffle furnace to obtain a solid material; finally, grinding the solid material to obtain the h-BN / Fe-ZnO / g-C3N4 composite photocatalyst. The h-BN / Fe-ZnO / g-C3N4 composite photocatalyst prepared by this invention can effectively separate electron-hole pairs, reduce the electron-hole recombination rate, and thus effectively improve photocatalytic activity. This material exhibits excellent degradation performance for Rhodamine B water pollutants. Using 40 mg h-BN / Fe-ZnO / g-C3N4 composite photocatalyst under a 300W xenon lamp with a wavelength λ≥420 nm to simulate visible light, 100 mL of Rhodamine B with a concentration of 20 mg / L was degraded. After 90 minutes, the degradation efficiency reached 98.4%, and after five cycles, the degradation rate still reached 80.1%, demonstrating good reusability.

To provide a structure for manufacturing a container in which different components are attached together with an adhesive, thereby improving the efficiency of observing biologically derived substances. [Solution] The structure comprises a base material having a plurality of through holes opening in the vertical direction, and an adhesive layer provided on the lower surface of the base material, to which a sheet that closes the through holes is attached. The adhesive layer is formed by attaching a test piece cut to a size of 10 mm × 10 mm, with an opening diameter of 16.2 mm, a well depth of 18 mm, and a well volume of 3.5 mL, to the bottom surface of a tissue culture polystyrene well having an opening below the through holes, with an outer shape in plan view larger than the outer shape of the through holes, and filling the well with 0.5 mL of a phosphate-buffered saline solution with a concentration of 5 μM rhodamine B, and letting it stand at 23°C for 48 hours, and the adhesive is formed by an adhesive such that the remaining percentage of rhodamine B in the solution is 20% or more. The adhesive is an acrylic or silicone-based adhesive.

The application discloses a fluorescent aptamer sensor and a method for detecting prostate specific antigen, wherein the fluorescent aptamer sensor comprises a solvent, and 5-carboxyltetramethylrhodamine labeled aptamer sequences and quencher PCN-223 dispersed in the solvent. The fluorescent aptamer sensor provided by the application has excellent selectivity and sensitivity in the detection of prostate specific antigen, and has a good application prospect.

The application discloses a preparation method and application of a cellulose-based material loaded cobalt-doped metal organic framework compound catalyst. The composite catalyst takes a cellulose-based material as a carrier, and is subjected to hydrothermal treatment together with an aqueous solution of ferric chloride hexahydrate and fumaric acid, so as to obtain a metal organic framework compound MIL-88A which is in-situ grown on the cellulose-based material, and then the MIL-88A is subjected to freeze drying. After the treatment, the obtained cellulose-based material loaded MIL-88A is added into a mixed aqueous solution of cobalt nitrate nonahydrate and urea, and is subjected to water bath treatment at 90 DEG C, and then the cellulose-based material loaded MIL-88A obtained after the treatment is subjected to freeze drying, so as to obtain the cellulose-based material loaded cobalt-doped MIL-88A catalyst. The prepared heterogeneous catalyst can efficiently degrade dyes by activating potassium monopersulfate. The catalyst is easy to recover, and can be used in an intermittent or continuous dye degradation process. In the continuous degradation of a dye rhodamine B, when the flow rate is 6 ml / h, the catalyst can still maintain high catalytic degradation activity for 72 h.

A method for determining nitric oxide concentration in biological samples. The method includes for determining nitric oxide concentration in a sample including: (i) providing a nucleic acid complex comprising a first single-stranded nucleic acid molecule comprising a fluorophore crosslinked to the first strand, the fluorophore comprising diaminorhodamine-4-methylamine (DAR-4M) conjugated, to dibenzocyclooctyne-polyethylene glycol (DBCO-PEGn) linker, wherein n equals 4-12 and a second single-stranded nucleic acid molecule that is partially or fully complementary to the first single-stranded molecule, wherein the nucleic acid complex further comprises a first label and a targeting moiety conjugated to the first single-stranded nucleic acid molecule or the second single-stranded nucleic acid molecule, the first label is capable of producing a signal, wherein the intensity of the signal is dependent at least on concentration of the nucleic acid complex in the sample; (ii) contacting the sample with the nucleic acid complex; (iii) measuring the intensity of the signal: and (iii) determining the nitric oxide concentration from the measured signal. Compositions for determining nitric oxide concentrations in biological samples are also included.

The present application relates to the technical field of water pollution, and more particularly to a method for degrading RhB by synthesizing P-doped tubular carbon nitride to drive photocatalytic activation of PMS. The steps are as follows: S1: preparing P-doped tubular carbon nitride; S2: applying the P-doped tubular carbon nitride obtained in step S1 to photocatalytic activation of PMS; and S3: using the photocatalytic activation of PMS to degrade RhB. The method for degrading RhB by synthesizing P-doped tubular carbon nitride to drive photocatalytic activation of PMS provided by the present application uses phosphoric acid and melamine as raw materials, and prepares P-doped carbon nitride (5P-TCN) with a tubular structure by a method of precursor self-assembly, and evaluates the PMS-photocatalytic effect of the 5P-TCN on a typical organic pollutant, Rhodamine B (RhB), under the action of visible light through batch experiments.

This invention relates to the field of X-ray imaging technology and discloses an X-ray imaging scintillator screen based on chiral perovskite nanocrystals and its fabrication process. The screen comprises: a flexible transparent substrate made of polyethylene terephthalate or polyimide film; a chiral perovskite nanocrystal composite layer; an inorganic oxide protective layer composed of SiO₂ or Al₂O₃; and a composite reflective layer comprising: a TiO₂ nanorod array layer located on the substrate surface; and a reflectance enhancement layer doped with 1-10 vol% rhodamine 6G or coumarin derivatives covering the surface of the TiO₂ nanorod array layer. By using a high-transmittance, low-roughness polyester or polyimide material on the flexible transparent substrate, combined with the surface-grown TiO₂ nanorod array and chiral perovskite nanocrystal composite layer, the light reflection efficiency and imaging contrast are significantly improved. Furthermore, the optimized light extraction path, achieved through a microprism structure, enhances the efficiency of X-ray conversion to visible light.

The invention discloses an orange fluorescent silicon nanodot, a preparation method thereof and an application of the orange fluorescent silicon nanodot in mitochondrial imaging in living cells, the method comprises the following steps: S1, dissolving tetramethyl rhodamine methyl ester in ultrapure water, then adding N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, uniformly stirring, and carrying out hydrothermal reaction on the obtained mixture; and S2, cooling after the reaction is finished, purifying the product by using a chromatographic column, eluting by using an eluent, collecting the eluent, and drying to obtain the orange fluorescent silicon nanodot. The silicon nanodot provided by the invention has the advantages of good light stability, high quantum yield and the like, and can be successfully applied to positioning imaging of mitochondria in living cells; compared with common blue-green fluorescence, orange fluorescence has better tissue penetrating ability and background interference resistance; the O-SiNDs prepared by the invention also has the property similar to that of lipophilic cations, and can realize high-specificity targeted marking on mitochondria of living cells.

The invention relates to a stomach adhesion type double-network hydrogel sensor capable of realizing long-time gastric acid imaging and application of the stomach adhesion type double-network hydrogel sensor. The RHO-PDI probe takes perylene bisimide as a framework and rhodamine B as an acid response unit, pKa is approximately equal to 1.97, and 500-650 nm fluorescence is emitted in gastric acid. The double-network hydrogel is formed by crosslinking sodium polyalginate-calcium ions and polyethylene glycol dithiol-four-arm maleimide, has excellent mechanical strength and gastric wall adhesiveness, and realizes long-term, stable and non-invasive dynamic monitoring of gastric acid and circadian rhythm hormone change tracking.

The invention belongs to the technical field of degradation of rhodamine B by a cobalt-based catalyst, and particularly relates to experimental equipment and a method for degrading rhodamine B by a biomass charcoal modified cobalt-based catalyst. The experimental equipment comprises a catalyst preparation mechanism; the catalyst preparation mechanism is placed at the left end of the table top, and the catalyst preparation mechanism is used for preparing cobalt-based catalysts with different lignin addition amounts; the catalyst preparation mechanism is arranged at the right end of the table top, the solution preparation and adsorption mechanism is arranged at the right end of the catalyst preparation mechanism, the solution preparation and adsorption mechanism is placed at the right end of the table top, and the solution preparation and adsorption mechanism is used for preparing an RhB solution and a PMS solution. The experiment can be more coherent, and multiple complex procedures of the experiment are reduced, so that the experiment speed is increased, and meanwhile, experiment substances can be displayed more clearly.

The application belongs to the field of fluorescent sensing, and discloses a sulfur rhodamine peroxynitrite probe containing an indole bottom ring, a preparation method and application thereof. The new compound SR-In of the application is not fluorescent due to PET effect, and generates a new fluorescent substance, thioxanthone, after reacting with peroxynitrite. Since the spectral range of sulfur rhodamine and thioxanthone is completely different, the fluorescent signal can be greatly changed before and after detection, and high-sensitivity detection of peroxynitrite is realized. In addition, the indole bottom ring in the structure of SR-In can only be combined with peroxynitrite and oxidized into thioxanthone, so SR-In does not react with other common active oxygen in the organism, and good peroxynitrite selectivity is shown.