913 results about "Rhodamines" patented technology

The invention relates to a piece of surface enhanced raman detection test paper and the application thereof, which belong to the technical field of ultra-sensitive test analysis, in particular to the piece of surface enhanced raman detection test paper and the application of the paper to detection of biological or chemical probe molecules with raman signals. The surface enhanced raman detection test paper is obtained by covering a precious metal layer on the surface of paper with a natural fiber micro nano multi-grade structure through the physical vapor deposition or chemical plating technology, the paper can be filter paper, parchment paper, napkin, newspaper or printing paper and the like, the precious metal film is gold or silver and the like, and the thickness of the precious metal film is 5 nanometers to 90 nanometers. Combined action of size, period and roughness enables incident light to generate a local electric field on the surface of a multi-stage structure and enables the electric field to be enhanced, and the detection limit can reach 10-10mol/L. The test paper has the advantages of being good in flexibility, low in cost, free of environment pollution, capable of being prepared in batch and the like, thereby being capable of being used in detection of probe molecules such as rhodamine 6G, p-aminothiophenol, riboflavin or ethanol and the like.

The invention relates to a fluorescent ion probe (I) with high selectivity and high sensitivity in detection and the application of the fluorescent ion probe in identifying and detecting heavy metal ion and transition metal ion, wherein, the Y is an organic conjugate group with fluorescence transmitting function such as pyrene, naphthalene, 4-amidogen-1, 8-naphthyl imide, Dan sulfonamide, anthracene, carbazole, benzimidazoins, benzoxazoles, boron fluoride bipyrrole (BODIPY), fluorescein, 3, 4, 9, 10-perylenetetracarboxylic diimide or rhodamine B; the X is acylamino group, sulfoamino group or ester group. The fluorescent ion probe uses the fluorescence peak of fluorescence chromophore aggregate as the response signal to identify metal ion, thereby effectively avoiding the quenching effect of transition metal ion and heavy metal ion on fluorophore; moreover, the fluorescent ion probe realizes selective identification of heavy metal ion and transition metal ion in various solvents and aqueous solution in particular.

Iodine doped bismuthyl carbonate nanosheet and molybdenum disulfide modified carbon nanofiber composites, preparation method and its application in wastewater treatment are disclosed. Bismuth citrate and sodium carbonate as precursors, sodium carbonate as a precipitating agent, dispersed in a mixed solution of water and ethylene glycol, sodium iodide as a iodine source, nano carbon fiber membrane act as the carrier, to synthesis carbon fiber membrane that modified by iodine-doped Bi₂O₂CO₃ nanosheets; then sodium molybdate and thioacetamide as precursors, dispersed in water to react to obtain iodine doped bismuthyl carbonate nanosheet and molybdenum disulfide modified carbon nanofiber composites. The composite material synthesized through a series of steps exhibit excellent photocatalytic activity for the degradation of Rhodamine B and can be recycled for many times. And this invention has the advantages of simple preparation process, easy recovery and multiple use, etc., and has industrial application prospect in water pollution treatment.

The invention relates to a graphene/silver molybdenum oxide compound visible-light catalyst and a preparation method thereof, in particular to a method for preparing the graphene/silver molybdenum oxide-combined visible-light catalyst by water and heat, belonging to the technical field of compound materials and photocatalysis. The preparation method comprises the following steps: taking graphene oxide, silver nitrate and ammonium heptamolybdate as raw materials according to certain proportion, mechanically stirring and mixing the raw materials uniformly in sequence, adjusting the pH value of solution, and then utilizing hydro-thermal reaction to prepare the graphene/silver molybdenum oxide compound visible-light catalyst. The photocatalytic degradation experiment shows that the graphene/silver molybdenum oxide compound visible-light catalyst prepared by the method has a good phtocatalytic degradation effect on rhodamine B due to the irradiation of the visible light and is ideal.

The present invention relates to rhodamine 6G hydrazide salicylal azomethine, a synthesization method and an application in the content determination of cupric ions, which belong to the field of the analysis and determination of cupric ions in water sample. The molecular structural formula of the rhodamine 6G hydrazide salicylal azomethine is shown on the right, and the present invention discloses the synthesization method of the rhodamine 6G hydrazide salicylal azomethine and rhodamine 6G hydrazide salicylal azomethine solution used for the content determination of a small amount of cupric ions in water sample: 0 percent to 98.99 percent of ethanol, 99.99 percent to 1 percent of acetic acid / sodium acetate buffer solution with the pH value of 5 to 9, in which the total concentration of acetic acid is 1 to 100 millimoles per litre, 0.01 percent of N, N-dimethylformamide and 1ppm to 100ppm of rhodamine 6G hydrazide salicylal azomethine, all measured in mass percentage. By a spectrophotometer, the solution can be used for the accurate quantitative determination of 0.005ppm to 0.256ppm of cupric ions in water sample as well as the semiquantitative determination of no less than 0.075ppm of cupric ions in water sample by direct naked-eye observation on the change of colors.

The present invention relates to novel fluorinated 3,6-diaminoxanthene compounds derived from the basic structural formula (I) and to their uses as photostable fluorescent dyes, e.g. for immunostainings and spectroscopic and microscopic applications, in particular in conventional microscopy, stimulated emission depletion (STED) reversible saturable optically linear fluorescent transitions (RESOLFT) microscopy, and fluorescence correlation spectroscopy. The claimed compounds are also useful as molecular probes in various spectroscopic applications.

The invention belongs to the field of analytical chemistry and particularly relates to an analysis method for simultaneous detection of amino acids and biogenic amines in foods. The method is characterized in that for the first time, 4'-carbonyl chloride-rhodamine is used as a derivatization reagent to realize simultaneous derivatization of the amino acids and the biogenic amines in the food by means of ultrasonic assistance, in-situ derivation and dispersive liquid-liquid microextraction, and qualitative and quantitative detection and analysis are performed by means of ultra-high performance liquid chromatography coupled with triple quadrupole tandem mass spectrometry in multi-reaction monitoring mode. The method can be used for simultaneous analysis and detection of eight amino acids and nine biogenic amines; by adoption of 1,7-diamino heptane as an internal standard substance, contents of the amino acids and the biogenic amines in different foods can be obtained accurately according to an internal standard method for quantification. The method has advantages of simplicity, quickness, high sensitivity, high selectivity and the like, and high recovery rate is achieved. In addition, by the analysis method, accurate and reliable technical means can be provided for food quality assessment and supervision.

The invention discloses a visible-light-induced photocatalyst Bi4O5Br2 and a preparation method thereof. According to the visible-light-induced photocatalyst Bi4O5Br2 and the preparation method thereof, an improved low-temperature hydrothermal method is adopted, composition of Bi, O and Br in BiOX is controlled by controlling amount of a bismuth source and a bromine source, and a novel layered-cake-shaped visible-light-induced photocatalyst Bi4O5Br2 is prepared successfully. The preparation method is simple in production process, easy to operate, low in synthesis temperature, high in reaction yield, environment-friendly and low in cost and meets the requirement of actual production, the reaction yield is 92%, and raw materials are easy to obtain. The visible-light-induced photocatalyst has good visible-light catalytic activity, can completely degrade various organic pollutants such as rhodamine b, methyl orange and methylene blue in short time under the visible light irradiation, is small in light corrosion and good in reusability, can be applied to industrial production and particularly has a better application value in organic pollutant degradation through solar photocatalysis, and the market potential is large.

The invention discloses a black phosphorus/g-C3N4 composite visible light photocatalytic material. The black phosphorus/g-C3N4 composite visible light photocatalytic material is a product of black phosphorus and g-C3N4 by ball-milling compositing, wherein black phosphorus accounts for 0.5%-50% by weight of g-C3N4. Visible light responding semiconductor black phosphorus is subjected to ball-millingcompositing with g-C3N4 for the first time, and photocatalytic efficiency of g-C3N4 is improved effectively by constructing a heterostructure, so that the prepared black phosphorus/g-C3N4 composite visible light photocatalytic material can be used for degrading organic pollutants, is particularly applicable to degradation of organic photosensitizers and photoinitiators such as rhodamine B and hasgreat application prospect in the field of photocatalytic degradation of organic matter; the black phosphorus/g-C3N4 composite visible light photocatalytic material can be prepared with the ball-milling method, a preparation scheme is simple, and cost is low.

The invention discloses a class of anti-tumor compounds containing a triazole heterocyclic structure and an application thereof, belonging to the technical field of medicinal chemistry. The compounds containing the triazole heterocyclic structure introduce quintuple 1,2,3-triazole ring in the form of side chains through the amino condensation, bromination, nitrine substitution, link reaction and other reactions on the basis of naphthalimide parent structure, select tetrazolium salt reduction to test 7721 hepatocellular in the experiment of inhibiting proliferation of tumor cells, and also select sulfonyl rhodamine B protein staining method to test MCF-7 breast cancer cells. The experiment results show that the anti-tumor compounds have wide anti-tumor activity and good inhibition effect on the normal growth of tumor cells derived from different tissues of liver cancer, breast cancer and the like.

The invention discloses a synthesis method and an application of a porous carbonitride/copper oxide nanorod composite material with visible light response, and belongs to the fields of composite material preparation technologies and photocatalysis. The problems of small specific surface area, high photo-generated electron-hole recombination rate and low quantum yield of present carbonitride materials are solved in the invention. The composite material is prepared from melamine and copper acetate through a chemical reaction process and a heat treatment process with methanol as a solvent. Compared with carbonitride, the porous carbonitride/copper oxide nanorod composite material prepared in the invention has the advantages of high specific surface area, good photocatalysis performance, and effective degradation of rhodamine B under visible light. The preparation method has the advantages of simple process, cheap raw materials and large scale production; and the obtained composite material has large specific surface area, low photo-generated electron-hole pair recombination and good application prospect.

The invention relates to high-intensity photocatalytic cement-based composite slurry. The high-intensity photocatalyst cement-based composite slurry comprises a photocatalyst composite body, cement, aggregate, an active mixture, a polymer additive, fibers, a water reducing agent and water, wherein the photocatalyst composite body comprises modified rare-earth elements and N co-doped TiO2, activated carbon and conductive fillers. According to the preparation method, the slurry is prepared through the raw materials and then treated by pouring and maintaining and molding with high humidity under a high temperature and other processes to form a face brick and an exterior wall cladding. The product detection result shows that the ultimate bending strength of the product reaches 25 to 30MPa, the ultimate compressive strength reaches 150 to 200MPa, the shock strength reaches 15 to 20kJ/m<2>, an absorption band of a photocatalyst is subjected to redshift to reach a 600nm visible region, the degradation rate for a 1mg/L rhodamine aqueous solution after 6 hours reaches 85 to 90%, and therefore, the product is high in mechanical strength and high in capacity of degrading pollutants with the visible light in a photocatalytic manner.

The invention discloses a zinc coordination polymer as well as a preparation method and application thereof. According to the method, under a solvothermal condition, a zinc complex is prepared firstly, and then is doped with a small amount of cobalt ions, so that a doped complex is obtained. Compared with conventional method, the method disclosed by the invention has the advantages that a zinc complex catalyst doped with the small amount of cobalt ions is better in the reaction effect of catalyzing and light-degrading Rhodamine B, can realize recycling, and keep relatively high catalytic efficiency.

The invention provides a rhodamine fluorescent molecular probe using a quinoline derivative as an identification group and a synthesis method thereof, and relates to a rhodamine fluorescent molecular probe and a synthesis method thereof, solving the problem that the existing rhodamine fluorescent probe molecules based on the quinoline derivative identification group are few. A structural formula of a fluorescent molecular probe is as shown in specifications. A preparation method comprises the following steps: 1, preparing reaction liquid; and 2, adjusting the pH value of the reaction liquid, carrying out spin-drying and performing silica gel column chromatographic separation to obtain the rhodamine fluorescent molecular probe using the quinoline derivative as the identification group. A structural formula of another fluorescent molecular probe is as shown in specifications. A preparation method comprises the following steps: 1, preparing an intermediate rhodamine B hydrazide; and 2, dissolving the intermediate rhodamine B hydrazide and a quinoline-2-aldehyde derivative into absolute ethanol, refluxing under the protection of nitrogen, carrying out spin-drying and performing silica gel column chromatographic separation to obtain the rhodamine fluorescent molecular probe using the quinoline derivative as the identification group. The rhodamine fluorescent molecular probe disclosed by the invention is applied to the field of fluorescent imaging detection of metal ions in biological tissues and cell microenvironments.

The invention discloses a Fe<3+> molecular fluorescence sensor based on Rhodamine B and a preparation method and application of the Fe<3+> molecular fluorescence sensor. Rhodamine B is taken as a precursor, and a target product N1-(benzene[d] thiazole-2-yl)-N4-(2-(3',6'-bi(diethylin)-3-carbonyl screw[iso-indoline-1,9'-xanthene]-2-yl)ethyl) maleimide is synthesized at two steps. Detection on Fe<3+> by using the target product shows that the target product has a very good detection effect on Fe<3+>; and meanwhile the raw materials of the Fe<3+> molecular fluorescence sensor are easy to obtain, synthesis steps are simple, after-treatment is convenient to implement, and large-scale production can be relatively easily achieved.

The invention discloses a preparation method of a WO3/C3N4 mixed photocatalyst. The preparation method comprises the following steps: taking sodium tungstate and sodium chloride as the raw materials, preparing WO3 through a hydrothermal method, subjecting the WO3 to an ultrasonic dispersion treatment to obtain processed WO3; taking urea as the raw material, burning urea to obtain C3N4 in one step, subjecting C3N4 to an ultrasonic dispersion treatment to obtain processed C3N4; mixing the processed WO3 nano powder and processed C3N4 by a mechanical means and ultrasonic waves in sequence, washing the mixture, subjecting the mixture to a centrifugal treatment, and finally drying the mixture at a temperature of 70 to 80 DEG C to obtain the WO3/C3N4 composite photocatalyst. Under the same conditions, the catalytic degradation rate of rhodamine B of the provided photocatalyst is increased by 8%, compared with that of a conventional WO3/C3N4 composite photocatalyst, which is prepared through a grinding method; moreover, the catalytic time is shorter, and one hour after the starting of the catalytic reactions, the catalytic degradation rate of rhodamine B can reach 99%.

The invention relates to a high-molecular pH probe containing a rhodamine lactam group thereof. A synthetic method comprises the following steps: carrying out a reaction on rhodamine with hydroxyl on a site 2 and ethidene diamine to form lactam; carrying out a reaction on lactam and a matter containing an acryloyl chloride group to obtain a monomer containing the rhodamine group; finally, copolymerizing with the matter containing the acryloyl chloride group to synthesize the high-molecular pH fluorescent probe which has fluorescent response to H' specificity and can enter into viable cells.

The invention discloses a silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst and a preparation method thereof. The silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst is formed by loading visible light photocatalyst silver phosphate on oxygen vacancy type titanium dioxide, wherein the mass ratio of the silver phosphate to the oxygen vacancy type titanium dioxide is 1.0 to (0.015-2.0). The preparation method comprises the following steps: firstly, preparing an oxygen vacancy type titanium dioxide material and mixing the oxygen vacancy type titanium dioxide material with silver ions to prepare a uniform solution; adding phosphate ions, carrying out a stirring reaction and filtering; and drying an obtained filtering cake in vacuum to prepare the silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst. The silver phosphate/oxygen vacancy type titanium dioxide compound photocatalyst disclosed by the invention has the high reaction activity on photocatalytic degradation of an organic pollutant Rhodamine B. The preparation method is simple and feasible and low in production cost, has low pollution in a production process and is suitable for industrialized large-scale production.

The invention relates to a rhodamine 6G-based mercury ion detection fluorescent probe molecule; the fluorescent probe molecule has a structure as follows. The invention also discloses a preparation method of the rhodamine 6G-based mercury ion detection fluorescent probe molecule, and application thereof in mercury ion detection. The structure is shown in the description.

The invention provides a preparation method for a BiOCl photocatalyst with a controllable morphology and a crystal face, and belongs to the technical field of environmental chemical engineering photocatalysis water treatment. The preparation method is characterized by comprising the following steps: adding Bi(NO3)3.5H2O into a certain amount of water, ethyl alcohol or a dimethyl formamide solvent, uniformly stirring, then adding a certain amount of chlorination-1-butyl-3-methylimidazole, stirring for 20min for uniform mixing, performing ultrasonic treatment under room temperature for 10-60min, and reacting to generate white precipitate; washing the precipitate by water and ethyl alcohol, and drying the precipitate under the temperature of 60 DEG C to obtain BiOCl photocatalyst powder with different morphologies. According to the preparation method provided by the invention, the BiOCl preparation period is short, and the use of a surfactant is avoided; by control on the solvent, the preparation method for implementing BiOCl crystal surface control (101 and 102) and morphology control (a nano sheet shape, a flower-like structure and an irregular disk shape) can be conveniently realized. The preparation method is completed in the next step under the room temperature, has the advantages of simple process, extremely short preparation period, environment friendliness and the like and is favorable for engineering large-scale preparation. The catalyst has outstanding degrading effects on rhodamine B, methyl orange, quinoline blue and the like by visible light and sunshine and has an actual application prospect.

The invention provides a preparation method of a zinc oxide nanorod/g-C3N4 nanosheet composite photocatalyst material. The zinc oxide nanorod/g-C3N4 nanosheet composite photocatalyst material is prepared by adopting melamine, zinc acetate dehydrate, sodium hydroxide, hexadecyltrimethyl ammonium bromide and absolute ethyl alcohol as main raw materials through a hydro-thermal synthesis method; zinc oxide in the composite material is a one-dimensional zinc oxide nanorod with uniform morphology; the morphology of g-C3N4 is a two-dimensional nanosheet structure. The product respectively degrades an organic pollutant rhodamine B under simulated sunlight and visible light (lambda is larger than 420nm), so that the photocatalyst material is proved to have an excellent photocatalytic performance. The morphology and the size of the zinc oxide nanorod prepared by the method are uniform, and the thickness of the g-C3N4 nanosheet is less, so that the zinc oxide nanorod and the g-C3N4 nanosheet are tightly combined, the migration of photo-induced electron is facilitated, and the photocatalysis efficiency is improved. The material has good response in ultraviolet and visible light areas, so that the material not only has a better application prospect on the environmental protection field such as water pollution control, but also has a better development prospect on developing and utilizing renewable resources such as solar energy.

The invention discloses a preparation method of fluorescent microspheres based on a cross-linked polymer, wherein a fluorescent substance in the microspheres is an organic fluorescent dye. The preparation method comprises the following steps: 1, dissolving a dispersing agent polyvinylpyrrolidone into an alcohol-water polar medium in a certain proportion, and dispersing to obtain a clear and transparent solution; 2, adding an initiator azodiisobutyronitrile, a rhodamine fluorescent monomer and a polymer monomer into the system; 3, adding a cross-linking agent solution dissolved with an initiator and a monomer, uniformly stirring and dispersing the solution, and carrying out polymerization reaction at a certain temperature under the protection of nitrogen to obtain the monodisperse cross-linked polymer fluorescent microspheres. On the basis of adopting a traditional dispersion polymerization method, the feeding time is changed, so that the monodispersity of the fluorescent microspheres is improved; rhodamine fluorescent dyes are used and can be directly obtained; the fluorescent microsphere prepared by copolymerizing and wrapping the fluorescent dye with the cross-linked polymer hasa stable body structure and fluorescence efficiency, and good solvent resistance and thermal stability.

Provided are a The molecular formulas are as follows: [Cu(3-bpah)(5-MIP)].2H20; [Ni(3-bpah)(5-MIP)].H20; [Co(3-bpah)(5-MIP)].H20; [Cu(4-bpah)(5-MIP)(H20)]; [Ni(4-bpah)(5-MIP)(H20)].H2O; [Co(4-bpah)(5-MIP)]. Transition metal chlorides, semi-rigid bispyridine bisamide ligands and 5-methyl isophthalic acid are added into deionized water, after pH adjustment, the above mixture is reacted under hydrothermal conditions, and products are obtained. The transition metal compounds are advantageous in that the transition metal compounds have a simple synthetic method, have strong affinity to organic pollutants of methylene blue, methyl orange and rhodamine B, and have good catalytic degradation effects.