15 results about "Rhodamine derivative" patented technology

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.

This application discloses a light-converting agent, a method for preparing the light-converting agent, and a light-converting film. The light-converting film in this application is a europium complex copolymer synthesized by free radical copolymerization of an Eu complex and a Rhodamine B derivative. The Eu complex has a double bond structure exposed outside the 5-amino-1,10-phenanthroline molecule, and the exposed double bond position of the Eu complex structure is connected by a substitution reaction between an amino group and an acryloyl chloride. The Rhodamine B derivative has an exposed double bond structure attached to the carboxyl group of Rhodamine B. The method for preparing the light-converting agent in this application sequentially involves synthesizing 5-acrylamido-1,10-phenanthroline, synthesizing the Eu complex, synthesizing the Rhodamine B derivative, and synthesizing the light-converting agent. The light-converting film in this application includes the light-converting agent. The light-converting agent and the light-converting film in this application can convert both ultraviolet and yellow-green light into red light, improving the utilization rate of sunlight in plant photosynthesis.

This invention discloses a highly sensitive intelligent color-changing textile fiber and its preparation method, belonging to the field of materials. The preparation method includes the following steps: S1: The fiber is impregnated in a color-changing coating solution and then subjected to a first-stage photoinitiated polymerization; the color-changing coating solution is formulated by combining a mechanosensitive group with a vinyl monomer; the mechanosensitive group is a rhodamine derivative mechanosensitive group; S2: The fiber obtained in S1 is subjected to multi-stage impregnation-photoinitiated polymerization in a swelling solution to obtain the intelligent color-changing textile fiber; the swelling solution is formulated by combining a vinyl monomer and a crosslinking agent. This invention has advantages such as highly sensitive intelligent color changing.

This invention discloses a highly selective copper ion ratiometric fluorescent probe based on a rhodamine derivative, its preparation method, and its applications, belonging to the field of fluorescent probes. Specifically, the probe of this invention can be used to measure, detect, or screen copper ions, achieving selective recognition of copper ions with strong anti-interference capabilities; it enables rapid and highly sensitive analysis of copper ions; it has colorimetric capabilities, thus facilitating visual detection of copper ions; it is a ratiometric fluorescent probe, eliminating the influence of various environmentally irrelevant factors and improving its sensitivity; it has low cytotoxicity, which is beneficial for application under physiological conditions; and it also has the advantages of simple synthesis, stable properties, and commercial application.

The present invention belongs to the field of antibiotic detection, and in particular to a method for detecting tetracycline in meat products based on a copper-activated upconversion bismuth molybdate sensing system. The steps are: preparing upconversion nanomaterials and rhodamine derivatives, dissolving the two in methanol to obtain two solutions and mixing them in proportion to construct a sensing system. At the same time, the present invention synthesizes a bismuth molybdate-bismuth sulfide complex by a solvent thermal method, effectively improving the decomposition efficiency of tetracycline and copper ion-tetracycline complex in the solution, and shortening the reaction time. By decomposing the copper ion-tetracycline complex and tetracycline, the remaining tetracycline in the complex and the solution can be avoided from continuing to react with the copper ion, further avoiding the interference of the subsequent reaction on the upconversion fluorescence signal, reducing the detection limit of the method, and improving the detection accuracy. In summary, the present invention provides a novel tetracycline detection method, which does not require expensive instruments, reduces the detection cost, can be used for the detection of actual samples, and has broad application prospects.

The invention provides a rhodamine derivative fluorescent probe as well as a preparation method and application thereof, and belongs to the technical field of fluorescence detection. The preparation method comprises the following steps: mixing rhodamine 110 conjugated PEG azide, triethylamine and anhydrous dichloromethane to obtain a mixed solution; and dropwise adding a 2, 4-dinitrobenzenesulfonyl chloride solution into the mixed solution, reacting at low temperature, and reacting at normal temperature in a dark place to obtain the rhodamine derivative fluorescent probe. The rhodamine derivative fluorescent probe shows good stability when being used for detecting the selenocysteine, has low detection limit on the selenocysteine, has high sensitivity and good selectivity, and is suitable for detecting the selenocysteine in livestock and poultry products.

This invention discloses a fluorescent probe for detecting peroxynitrite in living cells and its synthesis method. The fluorescent probe comprises an amphiphilic group, 4-amino-2-methoxyphenol as a recognition unit, and a rhodamine derivative fluorophore, wherein the recognition unit can interact with ONOO. ‑ A specific oxidation reaction occurs, causing significant changes in fluorescence intensity and emission wavelength, thereby enabling real-time imaging and quantitative analysis of peroxynitrite in the cellular microenvironment. The fluorescent probe of this invention possesses high selectivity, strong anti-interference capabilities, and rapid response, making it suitable for the detection of ONOO at the live-cell level. ‑ Dynamic observation.

This invention belongs to the field of analytical detection, and relates to small molecule fluorescent probes, specifically a near-infrared fluorescent probe, its preparation method, and a dual-response detection method for Cu. 2+ Applications in Aβ aggregates. The probe is modified on the fluorophore of a rhodamine derivative to redshift its emission wavelength to the near-infrared region. The fluorescent probe of this invention is named ( E )-2-amino-6'-(diethylamino)-4'-(4-(piperidin-1-yl)benzylmethyl)-1',2',3',4'-tetrahydrospiro[isoindoline-1,9'-oxanthracene]-3-one, its outstanding feature is: this fluorescent probe can achieve the detection of Cu in Alzheimer's disease (AD). 2+ Simultaneous detection of Aβ aggregates is simple to prepare, and its near-infrared fluorescence emission (765nm) can effectively avoid background interference, exhibiting high sensitivity and good selectivity.

The application relates to the technical field of rhodamine derivatives, and specifically discloses a selenium-containing rhodamine derivative and application thereof. The application innovatively proposes a selenium-heavy-atom-containing rhodamine derivative, which has a visible light absorption wavelength close to the near-infrared region of 700 NM, which enables it to penetrate deeper tissue sites for deep treatment; meanwhile, the selenium-heavy-atom-containing rhodamine derivative also exhibits a high triplet state conversion rate, and can efficiently generate reactive oxygen species under light excitation conditions, thereby strengthening the killing effect on cancer cells and cancer tissues. Compared with the prior art, the selenium-heavy-atom-containing rhodamine derivative of the application can realize efficient removal of cancer cells and cancer tissues at a concentration of only nanomolar order, thereby significantly improving the treatment efficiency and reducing the drug dosage; meanwhile, the preparation process of the rhodamine derivative provided by the application is simple and easy to implement, and a relatively high synthesis yield can be obtained, and the rhodamine derivative is more suitable for large-scale, low-cost production and application.

This invention discloses a bifunctional fluorescent probe that simultaneously distinguishes between adenosine triphosphate (ATP) and hydroxyl radicals (·OH). The chemical structure of the bifunctional probe is as follows: This bifunctional fluorescent probe combines a rhodamine derivative and a coumarin derivative through a simple condensation reaction, utilizing the specific interaction between the nitrogen-containing group and ATP, and the aromatic hydroxylation of ·OH, to detect and distinguish between ATP and ·OH. When the probe reacts with ATP, it emits red fluorescence at 590 nm under an excitation wavelength of 520 nm; when it reacts with ·OH, it emits green fluorescence at 496 nm under an excitation wavelength of 420 nm. This probe exhibits excellent selectivity and high sensitivity in detecting ATP and ·OH, and has great application prospects in analytical chemistry, life sciences, biomedicine, and other technical fields.

The invention discloses a preparation method of a flexible color developing film or an array device based on dye and doped metal oxide nanoparticles and application of the flexible color developing film or the array device in oxygen / ammonia gas detection, and belongs to the field of ammonia gas and oxygen gas detection. The preparation method comprises the following steps: S1, respectively preparing a precursor solution containing Cu or Fe-doped metal oxide nanocrystals and a polymer solution; s2, mixing the two solutions prepared in S1, adding rhodamine derivative dye powder, and uniformly stirring and mixing to obtain a mixed solution of dye / metal oxide precursor / polymer; s3-A, carrying out spin coating or blade coating on the mixed solution on the surface of glass to form a film, and then drying to obtain a thin film; or S3-B, dripping the mixed solution into the arrayed grid pattern on the surface of the glass, and drying to obtain the arrayed device. The device has the advantages of low cost and easiness in manufacturing, can be simultaneously applied to the field of oxygen and ammonia gas detection, and can be repeatedly used.

The invention relates to a molecular complex emitting fluorescent light comprising, or consisting essentially of: ⋅—a fluorophore, and ⋅—a nucleic acid molecule, wherein said fluorophore has of the following formula 3

The present application relates to a kind of new fluorescent probe RH based on rhodamine derivative, is specially used to quickly, sensitively detect hypochlorous acid (HOCl) in aqueous solution.The fluorescent probe RH of the present application can effectively exclude the interference of common active small molecules, ensure to realize accurate detection in complex physiological environment.The experimental results show that probe RH can realize the significant fluorescence enhancement of HOCl at the fluorescence emission wavelength of 552 nm, the detection limit is as low as 18.6 nM, has the fast response time 2 minutes, and keep good response characteristics when coexisting with other interfering substances.The present application provides a new, efficient detection technology for real-time monitoring of HOCl, has wide application prospect, especially in biological imaging, environmental monitoring and public health and other fields, can provide more reliable tool for related research and practical application.