257 results about "Rhodamines" patented technology

The invention discloses a ratio-type fluorescence analysis method for determining sodium dehydroacetate, which comprises the following steps: under an alkaline condition, synthesizing tetrafluoroterephthalic acid oxide, namely a fluorescent substance TFAox, by oxidizing tetrafluoroterephthalic acid with hydrogen peroxide, and forming a ratio-type fluorescence probe by the fluorescent substance and rhodamine B, a ratio-type fluorescence analysis method of sodium dehydroacetate is constructed based on the ratio-type fluorescence probe, and the method can be successfully applied to determination of sodium dehydroacetate in a water sample and a bread sample. The ratio-dependent fluorescence detection method for determining sodium dehydroacetate provided by the invention has the characteristics of wide linear range, high detection sensitivity, no interference of coexisting substances on determination, good selectivity and the like.

The present invention belongs to the technical field of mechanochromic materials, and specifically relates to a mechanochromic material containing rhodamine with a hydantoin structure, and its preparation method and application. The rhodamine mechanochromic material containing a hydantoin structure is shown in structure (I), with rhodamine B as the matrix, reduced to rhodamine alcohol, oxidized to generate rhodamine aldehyde, and reacted with hydantoin to prepare a six-membered spirocyclic rhodamine containing a hydantoin structure. The rhodamine compound containing a hydantoin structure involved in the present invention has good ion interference resistance, exhibits photochromic properties in a dichloromethane solvent, and has the properties of mechanical stress discoloration and solvent mixing stress discoloration with high contrast and good repeatability. The solid powder of the rhodamine mechanochromic material containing a hydantoin structure has the characteristic of changing color upon grinding. After the action of mechanical force, the color of the powder changes from yellow to pink, and a reversible color change is achieved during the grinding-heating process.

The invention relates to the technical field of medical chemistry, in particular to a bridge oxygen site regulatively modified rhodamine anti-cancer fluorescent compound as well as a preparation method and application thereof. The invention develops the rhodamine anti-cancer fluorescent compound of which the meso site is functionalized by tetraarylethene and the bridge oxygen site can be regulated and modified, the fluorescent compound has adjustable red light-near infrared fluorescence emission and excellent fluorescence quantum yield, and the quantum yield can be as high as 99%; the fluorescent compound specifically targets mitochondria, and mainly inhibits growth of tumor cells by inducing para-apoptosis; under irradiation of 655 nm near-infrared laser, ferroptosis is further triggered, efficient treatment of tumor cells is achieved through chemical-photodynamic synergistic effect, and a new treatment thought is provided for overcoming tumor drug resistance.

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.

The present invention discloses a six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure, a preparation method thereof, and an application thereof. The six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure has the structural formula shown in (I). The preparation method comprises the following steps: weighing equimolar amounts of 2-aldehyde rhodamine B and 2-hydrazine benzothiazole, dissolving them in dry ethanol, heating to 80°C for reaction for 4 hours, cooling to room temperature, and distilling under reduced pressure. The obtained solid is purified by column chromatography to obtain a light pink solid, which is the six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure. The fluorescent probe of the present invention has good sensitivity to copper ions and can qualitatively and quantitatively detect copper ions in a solution.

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 relates to the technical field of preparation of photocatalytic materials, in particular to a preparation method of a ZnWO4 and Bi2WO6 composite photocatalyst, which is characterized in that a monomer photocatalyst of ZnWO4 and a monomer photocatalyst of Bi2WO6 are respectively prepared by a hydrothermal method, and then a binary ZnWO4 / Bi2WO6 composite photocatalyst is prepared by a secondary hydrothermal method. The composite structure of the composite photocatalyst is beneficial to separation and transfer of photon-generated carriers, an organic pollutant rhodamine B solution with the concentration of 10 ppm can be degraded, excellent photocatalytic degradation performance is shown under excitation of visible light, and the preparation method is simple, easy to operate and suitable for application and popularization.

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 invention provides spherical lignin-phenolic resin, a preparation method thereof and application of the spherical lignin-phenolic resin in adsorption of N-containing organic dye, and belongs to the technical field of adsorption materials. The lignin-phenolic resin with the regular spherical morphology can be prepared through a one-step condensation polymerization reaction by taking lignin, hydroquinone and trioxymethylene as raw materials under an acidic catalysis condition and adopting a reversed-phase suspension polymerization method, the lignin belongs to a renewable resource and has the characteristics of low cost and environmental friendliness, and the lignin-phenolic resin can be used for preparing the lignin-phenolic resin with the regular spherical morphology. The phenolic resin can replace phenols to become a main phenol source, the substitution rate can reach 75%, and the yield of the synthesized phenolic resin reaches up to 60-80%. Besides, abundant phenolic hydroxyl groups, sulfonic acid groups and other oxygen-containing groups can be introduced into the resin by selecting the types of monomers, the cross-linked structure of the resin is changed by regulating and controlling the proportion of the monomers, the adsorption capacity of N-containing organic dyes is effectively improved, and efficient adsorption of rhodamine B and methylene blue can be achieved.

The invention relates to the technical field of high polymer materials, particularly discloses a photochromic TPEE thermoplastic elastomer, and also discloses a preparation method and application thereof. The photochromic TPEE provided by the invention is prepared from the following raw materials: purified terephthalic acid, 1, 4-butanediol, a polyether soft segment and a photochromic small molecule, and the photochromic small molecule is Rh6G-2OH. According to the TPEE with the photochromic function, the material structure comprises rhodamine micromolecules, the micromolecules have a spirolactam structure, and based on the structure, the elastomer material provided by the invention has the photochromic function. After being illuminated by ultraviolet rays, the elastomer material can absorb ultraviolet ray energy to generate a light response behavior, so that the material is discolored.

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 application discloses a porous silver nanosheet / zinc oxide nanorod array structure, a preparation method and application thereof. The zinc oxide nanorod is vertically grown on a conductive substrate, and then a layer of gold is decorated on the zinc oxide nanorod and the surface of the substrate where the zinc oxide nanorod is located; and porous silver nanosheets are grown in the gaps between the surface of the gold-plated zinc oxide nanorod and the gold-plated zinc oxide nanorod. The preparation method of the porous silver nanosheet / zinc oxide nanorod array structure is as follows: under the condition of a 90-98 DEG C water bath, zinc oxide nanorod arrays are grown on the surface of a conductive glass placed in a zinc-ammonia solution; then a small amount of gold is decorated on the surface of the zinc oxide nanorod by using a sputtering method; and finally, porous silver nanosheets are electrodeposited on the surface of the zinc oxide nanorod array by using an alkaline silver electrolyte, so as to obtain the target product. The product has high surface-enhanced Raman scattering (SERS) sensitivity, and can be widely applied to SERS detection of organic matters, such as rapid detection of rhodamine 6G.

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 invention discloses a preparation method of a photocatalytic material for wastewater treatment, and belongs to the technical field of photocatalytic materials. The preparation method specifically comprises the following steps: S1, preparing TiO2 (at) GaP (at) Fe2O3; s2, absolute ethyl alcohol is added into TiO2 (at) GaP (at) Fe2O3, dimethyl diallyl ammonium chloride, modified graphene oxide and a silane coupling agent are added after ultrasonic dispersion, and after sufficient dispersion, a photocatalytic material is obtained through drying; the modified graphene oxide is graphene oxide grafted with disulfide bonds and polyacrylic acid. TiO2 is modified through GaP, ferric oxide powder, dimethyl diallyl ammonium chloride and modified graphene oxide, the photocatalytic material for wastewater treatment is obtained, and the photocatalytic material has high photocatalytic performance on wastewater containing methylene blue and / or rhodamine B under natural sunlight; meanwhile, the high photocatalytic performance is still kept after multiple times of recycling.

The present invention discloses a rhodamine B-doped silica / xylan carbon dot composite material and a preparation method thereof. In the method, rhodamine B and tetraethyl silicate are uniformly mixed to form RhB@SiO2. The carbon dots are covalently linked to the RhB@SiO2 to obtain RhB@SiO2 / BCD. A short DNA double helix is ​​formed by grafting a complementary chain onto the surface of the BCD, and a single-stranded aptamer with a quencher attached to one end is coupled to the carbon dots. The single-stranded aptamer specifically targets Vibrio parahaemolyticus. When Vibrio parahaemolyticus is present in the test sample, Apt.D detaches from the BCD surface and binds to a recognition site on the surface of the Vibrio parahaemolyticus, restoring fluorescence. Using the red fluorescence intensity R emitted by RhB@SiO2 as an internal standard, quantitative detection of Vibrio parahaemolyticus is performed based on the ratio of the blue fluorescence intensity B of BCD to R.

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 near-infrared light NIR response-based dual-regulation nano drug delivery system and application thereof, the nano drug delivery system takes mesoporous silica as a carrier, and alendronate sodium is coupled on the surface of the carrier to increase bone targeting; mesopores in the carrier are blocked by rhodamine RH, nitric oxide NO can be consumed to generate rhodamine B, and bioactive drugs in the carrier are released. The invention constructs a systemic drug carrier with bone targeting and diabetic bone microenvironment response release, and solves the problems that the bone healing ability of diabetic patients is significantly reduced, and traditional local treatment is difficult to effectively improve systemic bone microenvironment disorder; the problems that an existing local drug system cannot be released according to needs, local NO and NO in bone marrow are difficult to efficiently remove, and macrophages are difficult to transform to repair-promoting M2 type are solved.

The present invention discloses a fluorescent probe based on a silicon-substituted rhodamine derivative, its preparation method, and its application, relating to the field of biochemistry. The present invention provides the structural formula of the fluorescent probe based on the silicon-substituted rhodamine derivative and also provides a corresponding preparation method. The present invention designs a leucine aminopeptidase-responsive near-infrared fluorescent small molecule probe that can effectively identify head and neck squamous cell carcinoma, effectively addressing the low sensitivity, specificity, and response speed issues of existing technologies.

The application discloses a Bi4Ti3O12 nanosheet piezoelectric catalyst and a preparation method and application thereof. Bi(NO3)3*5H2O, Ti(OC4H9)4 and Ta2O5 are used as raw materials to prepare a precursor through co-precipitation, NaCl and KCl are used as molten salts to mix the precursor, and then ball milling is carried out, the obtained powder after the ball milling is dried, and then a molten salt reaction is carried out, so that the product is obtained, and after washing and drying, the Bi4Ti3O12 nanosheet piezoelectric catalyst is obtained, and is successfully applied to piezoelectric catalytic degradation of rhodamine B. The prepared Bi4Ti3O12 nanosheet piezoelectric catalyst is a nanosheet with high purity and good crystallinity, and a high-activity exposed surface is beneficial to improving the transmission and separation of photo-generated charges, improving the piezoelectric catalytic performance of the Bi4Ti3O12 nanosheet piezoelectric catalyst, and the preparation process is simple.

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.