22 results about "Rhodamine" patented technology

The present application relates to a kind of electron donor (alpha-trithiophene) modified rhodamine dye, its synthesis method and application.The dye has strong absorption of 500-600 nm, can emit efficiently in 550-700 nm band, suitable for deep tissue imaging.The structure endows mitochondria targeting ability, can be used as biomarker probe to realize subcellular organelle accurate positioning;Meanwhile, under light, it can efficiently produce reactive oxygen species through type I mechanism, suitable for the photodynamic regulation and biosensing for non-disease diagnosis and treatment purposes.In addition, the dye can also be used as organic photocatalyst for environmental or energy-related photocatalytic reaction.The present application provides a new choice for multi-scene optoelectronic functional materials.

This invention discloses a GSH-functionalized carbon dots / rhodamine B ratiometric fluorescence system, its construction method, and its application in nitrite detection. GSH-CDs are synthesized via a one-step hydrothermal method by mixing citric acid, o-phenylenediamine, glutathione, and hydrochloric acid in water. Unreacted precursors and small molecules are removed by purification, and the GSH-CDs are obtained by freeze-drying. The ratiometric fluorescence system is constructed by mixing rhodamine B, GSH-CDs, and an acidic buffer solution. The fluorescence intensity ratio F of GSH-CDs to rhodamine B is established. 460 / F 590 With nitrite (NO2) ‑ A calibration curve between concentrations was obtained, and the NO2 in the actual sample was experimentally detected using the spiked recovery method. ‑ Content. Under acidic conditions, with NO2... ‑ With increasing concentration, the GSH-CDs / RhB fluorescence intensity ratio (I 460 / I 590 Significant changes occurred, with the fluorescence intensity ratio compared to NO2. ‑ There is a good linear relationship between concentrations. Compared with the detection platform based on GSH-CDs, the ratio fluorescence system provided by this invention has a lower detection limit and significantly higher sensitivity.

This application discloses a fluorescent probe for labeling the outer membrane of Gram-negative bacteria, its preparation method, and its application. The fluorescent probe uses polymyxin (with its hydrophobic tail and two amino acid residue pairs removed) as a targeting group specifically targeting the outer membrane of Gram-negative bacteria. This structure can specifically bind to the lipopolysaccharide structure in the outer membrane, and is then linked to the fluorophore rhodamine, which has switching properties, to design and synthesize a fluorescent dye. This fluorescent probe, possessing fluorescent switching properties, can be applied to super-resolution imaging of the outer membrane of Gram-negative bacteria.

This invention belongs to the field of nanofiltration membrane technology, and particularly relates to a polyamide nanofiltration membrane, its preparation method, and its application. The polyamide nanofiltration membrane provided by this invention includes an ultrafiltration membrane and a polyamide selective layer attached to the ultrafiltration membrane. The polyamide selective layer is formed by a polycondensation reaction of a fully amino columnar aromatic hydrocarbon [5] and 1,3,5-benzenetricarboxyl chloride. The polyamide nanofiltration membrane of this invention can separate organic micropollutants such as Congo red, Rhodamine B, methylene blue, and methyl orange dyes, with a rejection rate of more than 95%. It also has good separation performance for some inorganic salts, with a rejection rate of more than 50%. The polyamide nanofiltration membrane of this invention can adapt to some harsh acid and alkali environments while maintaining excellent rejection performance. The polyamide nanofiltration membrane provided by this invention also has excellent antifouling performance.

The application discloses a fluorescent dye tracer method for tracking hydraulic fracturing cracks and application, and the method comprises the following steps: S1, configuring a fluorescent dye solution: using a water-soluble fluorescent dye rhodamine B to prepare a mass-volume ratio aqueous solution with a concentration of 0.01% to 0.05%; S2, pre-treating and cleaning the cracks of a sample: using a hydrochloric acid solution with a concentration of 1% to 3% to acid-wash the cracks of the sample, and then rinsing the sample with clean water; S3, pre-saturating the crack channel: pre-saturating the crack network of the sample; S4, injecting the fluorescent dye solution under low pressure pulse, so that the crack channel is filled with the fluorescent dye solution; S5, soaking and permeating: after the crack channel is filled with the fluorescent dye solution, stopping the injection and placing the sample, and soaking the sample to make the fluorescent dye solution penetrate into fine cracks and pores; S6, observing the dyeing: after the surface of the sample is dried, cutting the sample along the main crack direction to observe the internal crack direction, and performing quantitative analysis by using image processing software.

The application discloses a preparation method of a pyrite particle electrode based on a mechanochemical method, and adopts a normal-temperature wet-type ball milling process to simultaneously perform particle size refining, surface defect construction and nitrogen-doped carbon coating on natural pyrite and defatted soybean powder in an organic solvent, so that the destruction of a crystal form caused by high-temperature treatment is avoided. Then, the obtained composite powder is mixed with acetylene black, and ion cross-linking forming is performed on sodium alginate and calcium chloride in a low-temperature environment, so that a particle electrode with a three-dimensional porous structure is prepared. The method solves the problems of easy agglomeration and loss of the powder and poor conductivity, and the prepared electrode exhibits excellent charge transfer performance and catalytic activity in a 3DERs-PS system, has high degradation efficiency on rhodamine B and good cycle stability, and realizes efficient treatment of organic wastewater.

The application belongs to the field of photocatalysis, and particularly relates to a preparation method and application of a cadmium sulfide in-situ polymerized maleic anhydride photocatalytic material. In order to overcome the serious photocorrosion phenomenon of single CdS, the application polymerizes maleic anhydride on cadmium sulfide in-situ under the initiation of ultraviolet light by using a sulfur source, a cadmium source and a monomer maleic anhydride as raw materials, so as to obtain a cadmium sulfide in-situ polymerized maleic anhydride photocatalytic material. The material has a strong degradation on rhodamine B under visible light, and the stability and repeatability of the material are also relatively excellent. Meanwhile, the preparation method of the application is simple and safe in process, does not need any external initiator, is mild and green in condition, and is extremely easy to mass-produce, so that the application improves the limitation of the photocatalytic performance of current single CdS, and has an extremely wide application prospect in degradation of polluting dyes.

The application discloses the technical field of photocatalytic materials, and discloses a water-stable perovskite CsPbI3@PVP photocatalyst as well as a preparation method and application thereof. The preparation method is that a hydrophilic polymer PVP is used as an encapsulating material, CsPbI3 is encapsulated in the hydrophilic polymer PVP, and thus a water-stable perovskite CsPbI3@PVP photocatalyst is obtained. In the application, CsPbI3 is encapsulated in the hydrophilic polymer PVP, and the photocatalytic degradation of CsPbI3 in water is successfully realized. The direct band gap semiconductor CsPbI3 is used in the efficient photocatalytic degradation experiment, and for the first time, the perovskite degradation dye efficiency is improved to 100% rhodamine b degradation in 20 minutes.

This invention provides a method for preparing and applying a class of Motixafortide-nitrogen mustard conjugates and their fluorescent probes, belonging to the fields of peptide preparation and biomedicine. This invention utilizes a solid-phase peptide synthesis method to covalently link the DNA alkylating agent nitrogen mustard with the CXCR4 targeting peptide Motixafortide, and further couple it with a fluorescent dye, successfully preparing a series of novel conjugates and their fluorescent probes. Experimental verification shows that the Motixafortide-nitrogen mustard conjugates and their fluorescent probes prepared in this invention can significantly enhance the antitumor activity and targeting of nitrogen mustard to tumor cells. Simultaneously, the rhodamine B-labeled dinitrogen mustard conjugate BCCR exhibits specific targeting of the CXCR4 receptor and dual targeting of the tumor cell nucleus. These conjugates enable real-time tracking of the entire process of tumor targeting, cell delivery, and nuclear localization, providing a powerful tool for efficacy evaluation and mechanism research, thus possessing promising clinical translational prospects and application value.

The application belongs to the technical field of biological detection, and particularly relates to a probe compound for CoA detection, a fluorescent probe and application, comprising a modified rhodamine series fluorescent dye, a pantothenate kinase inhibitor, a HaloTag, a Nanoluc luciferase and a pantothenate kinase fusion protein; through protein labeling, a series of biosensors are obtained, coenzyme A concentration in living cells can be rapidly detected, and rapid screening of coenzyme A drugs is regulated; through rational design and modification of the chemical probe molecules, and engineering modification of the sensor proteins, the chemical probes can label the sensor proteins in living cells, and then the bioluminescent sensors working in living cells are obtained, the requirements of rapid and high-sensitivity detection of CoA can be met, and the drugs capable of regulating the change of coenzyme A concentration can be high-throughput screened.

The application discloses a method for ultrafast degradation of organic dye pollutants through a microdroplet system, and belongs to the technical field of degradation of organic dye pollutants. The method comprises the following steps: forming microdroplets by spraying a solution containing organic dye pollutants to be treated through a spraying device, and making the microdroplets contact with a solid substrate to realize degradation of the organic dye pollutants; the solid substrate is a metal substrate; the organic dye pollutants include at least one of methyl blue, chrome black T, crystal violet and rhodamine B. The method has wide applicability to various toxic dyes (including methyl blue, chrome black T, crystal violet and rhodamine B), and can achieve a degradation rate of more than 90% under a circulating spraying operation. The achievements provide basic scientific support for water purification, and open up a new path for sustainable environmental remediation technology.

The application discloses a preparation method of SnO2 / SnIn4S8 heterojunction photocatalytic film and application thereof. The preparation method comprises the following steps: taking borosilicate glass as a substrate, firstly, depositing SnCl2.2H2O powder on the surface of the substrate by a gas phase deposition method to form a SnO2 film, and then, placing the substrate in a precursor solution containing SnCl4.5H2O, InCl3, ascorbic acid and thioacetamide, and growing a SnIn4S8 film on the surface of the SnO2 film in situ through a hydrothermal reaction to obtain the SnO2 / SnIn4S8 heterojunction photocatalytic film. The SnO2 / SnIn4S8 heterojunction photocatalytic film is prepared by using a two-step method, i.e., a gas phase deposition method and a hydrothermal crystallization method, and has the advantages of simple preparation process, low cost and easy availability of raw materials. The prepared SnO2 / SnIn4S8 heterojunction photocatalytic film has the advantages of high catalytic degradation reaction rate, reusability, wide application range, low cost and industrialization.

The application discloses an artificial light capturing system and a construction method and application thereof, and belongs to the technical field of agricultural light regulation and functional materials, wherein the artificial light capturing system comprises a donor and an acceptor, the donor is a complex formed by a compound DBI and a metal cation, and the acceptor is a fluorescent dye capable of receiving the energy of the donor and emitting fluorescence. The application constructs the artificial light capturing system by taking the complex formed by the small-molecule compound DBI and the metal cation as the donor and taking rhodamine 6G as the acceptor, and has the characteristics of simple synthesis, low cost, excellent light conversion capacity (converting short-wavelength light into long-wavelength light) and adjustable donor-acceptor ratio; the artificial light capturing system is used for preparing a light conversion film, and can promote the growth of legume plants such as Dutch beans.

The study is concerned with synthesizing copper oxide nanoparticles with leaf extract Vitex Agnus-Castus (VAC). The leaf extract VAC is a reduction agent for the synthesis of the nanoparticles. The leaf extract was prepared and then processed in the precipitation using copper salt solutions. The results of scanning electron microscopy (SEM) and dynamic light scattering (DLS) revealed that the green synthesized copper oxide nanoparticles (CuO NPs) are spherical in shape and have a mean particle size of 22 nm. The XRD graph showed the crystalline and monoclinic phases of CuO NPs. The adsorption characteristics of the nano-adsorbents were investigated using Rhodamine B (RhB) as a target model. Box-Behnken design (BBD) in response surface methodology (RSM) was used to optimize various process parameters, such as pH solution (A: 3-11), adsorbing dose (B: 0.2-2 g.L-1), Concentration dye (C: 20-80mg.L-1). A second-order polynomial equation was used to calculate the experimental results. In conclusion, we have illustrated an effective and environmentally friendly nano-adsorbent for removing pollutants from waters, which will also be attractive for multifunction applications. Keywords: Green synthesis, CuO, Nanoparticles, Removal dye, Rhodamine blue. BBD, RSM

The present application belongs to the field of environmental pollution detection and treatment technology, and particularly relates to a preparation method of AgCl / Ag composite material and application of the AgCl / Ag composite material in detection and degradation of rhodamine B. The present application provides a SERS substrate based on the AgCl / Ag composite material, which realizes SERS spectrum detection and quantitative analysis of rhodamine B. Silver nitrate and hydrochloric acid are reacted to generate AgCl, polyvinylpyrrolidone is used for dispersion, Ag nanoparticles are grown on the surface of AgCl by introducing silver ammine solution to form a core-shell structure, and the Raman signal is significantly enhanced. In view of the great harm of rhodamine B to water environment, the present application further coats tetrabutyl titanate on the surface of AgCl / Ag, hydrolyzes and calcines to form a TiO2 shell layer, constructs an AgCl / Ag / TiO2 composite material, and realizes efficient degradation of rhodamine B.

The application discloses an oxygen-rhodamine near-infrared fluorescent dye, and a structural formula of the oxygen-rhodamine near-infrared fluorescent dye is shown in formula (a) or formula (c), wherein R1 and R2 are respectively selected from hydrogen, an alkyl group or an alkenyl group; R5-R9 are respectively selected from hydrogen, an alkyl group, a methoxy group, an ethoxy group, halogen, a carboxyl group, a sulfonic acid group, a glycol group, a hydroxyl group or an amino group, and N is an integer greater than or equal to 0. The application further discloses a preparation method and application of the fluorescent dye. The compound is novel in structure, excellent in performance, simple in preparation method, and good in application prospect.

The application discloses a method for detecting rhodamine B by using solvent-induced fluorescence enhancement. The method synthesizes up-conversion nanoparticles NaYF4:20%Yb,2%Er@NaYF4:30%Nd (UCNPs) with small particle size, uniform size and good water solubility by a thermal decomposition method, and the up-conversion nanoparticles can emit 541 nm fluorescence under the excitation of 808 nm light and the fluorescence is absorbed by rhodamine B. A simple, stable, rapid and high-sensitivity method for detecting rhodamine B based on fluorescence enhancement of the up-conversion nanoparticles is established by changing the medium environment of the UCNPs by using a mixed solvent of N,N dimethylformamide and water. The method is simple in operation, high in selectivity and fast in response speed, and is successfully applied to tomato sauce actual samples.