355 results about "Fluorescent polymer" patented technology

The invention provides methods to detect molecular recognition events. The invention also provides methods to detect the presence of or identify a target species based on its interaction with one or more probe species. The methods of the invention are based on amplification of the signal due to each molecular recognition event. The amplification is achieved through photopolymerization, with the polymer formed being associated with the molecular recognition event. In an embodiment, a fluorescent polymer, a magnetic polymer, a radioactive polymer or an electrically conducting polymer can form the basis of detection and amplification. In another embodiment, a polymer gel swollen with a fluorescent solution, a magnetic solution, a radioactive solution or an electrically conducting solution can form the basis of detection and amplification. In another embodiment, sufficient polymer forms to be detectable by visual inspection.

A chemical composition including a moiety comprising a quencher (Q), a tethering element (T), and a ligand (L) that associates with and quenches a fluorescent polymer is disclosed. When an analyte sample is introduced, the ligand (L) binds to a target biological agent if it is present, thereby causing the QTL molecule to separate from the fluorescent polymer resulting in an increase in detected fluorescence. The same chemistry is advantageously employed in a competitive assay. An electric field can also be applied to separate the QTL molecule from the fluorescent polymer. A method for detecting targets for these methods are also disclosed.

A detector for detecting vapors emitted from analytes includes a housing, a pump and a sensing assembly. The housing has an inlet, an outlet and an enclosed sensing volume therebetween. The pump communicates with the housing for moving a carrier sequentially through the enclosed sensing volume at a predetermined flow rate. The sensing assembly senses the vapors of the analyte delivered by the carrier as the carrier passes through the housing. The sensing assembly includes a sensing unit constructed of an amplifying fluorescent polymer, a source of excitation, a detector, and a convertor assembly.

A chemical composition including a moiety comprising a quencher (Q), a tethering element (T), and a ligand (L) that associates with and quenches a fluorescent polymer is disclosed. When an analyte sample is introduced, the ligand (L) binds to a target biological agent if it is present, thereby causing the QTL molecule to separate from the fluorescent polymer resulting in an increase in detected fluorescence. The same chemistry is advantageously employed in a competitive assay. An electric field can also be applied to separate the QTL molecule from the fluorescent polymer. A method for detecting targets for these methods are also disclosed.

A chemical composition including a fluorescent polymer and a receptor that is specific for both a target biological agent and a chemical moiety including (a) a recognition element, (b) a tethering element, and (c) a property-altering element is disclosed. Both the fluorescent polymer and the receptor are co-located on a support. When the chemical moiety is bound to the receptor, the property-altering element is sufficiently close to the fluorescent polymer to alter the fluorescence emitted by the polymer. When an analyte sample is introduced, the target biological agent, if present, binds to the receptor, thereby displacing the chemical moiety from the receptor, resulting in an increase of detected fluorescence. Assays for detecting the presence of a target biological agent are also disclosed.

The present invention relates to a novel vascular access port for administering chemotherapeutics and the like that are subintimally implanted and attached to the fascia. By inclusion of one or more UV fluorescing polymers in the port a healthcare worker can shine a UV light in the area of the port and use the fluorescing polymer to find the injection site.

A sensing arrangement detects a compound of interest within a gas sample. An amplifying fluorescent polymer produces an output signal that varies in response to an interaction of the amplifying fluorescent polymer with the compound of interest. Additionally, an infrared illumination source produces infrared electromagnetic energy that causes the amplifying fluorescent polymer to generate the output signal. A MEMS detector is positioned to receive the output signal generated by the amplifying fluorescent polymer, and produces an output electrical signal that is responsive to an interaction between the compound of interest and the amplifying fluorescent polymer. The output electrical signal is responsive to a quenching of the output signal of the amplifying fluorescent polymer. A pattern database stoics pattern data corresponding to characteristics of compounds of interest.

A method to control a cooling water system based on the rate of consumption of fluorescent polymer is described and claimed. The method includes providing a cooling water system and a water treatment product including at least one fluorescent polymer and a fluorescent tracer. Measuring the fluorescence of the fluorescent polymer and calculating its rate of consumption provides a way of determining whether to adjust one or more operating parameters in the cooling water system.

Water-soluble fluorescent particles are formed in a simple process. A mixture comprising a solvent, water, a fluorescent polymer dissolved in the solvent, and an amphiphilic molecule is provided. The fluorescent polymer comprises a hydrophobic segment. The amphiphilic molecule comprises hydrophilic and hydrophobic segments. The solvent is removed from the mixture to allow the fluorescent polymer and the amphiphilic molecule to entangle in the presence of water, thus forming the water-soluble fluorescent particles. In the formed particles, the hydrophilic segments of the amphiphilic molecule are entangled with one another, and the hydrophobic segments of the fluorescent polymer and amphiphilic molecule are entangled with one another. The amphiphilic molecule encapsulates the fluorescent polymer and at least some of the hydrophilic segments are exposed to render the particle soluble in water.

An ink composition of a color conversion film is disclosed. The ink composition includes a fluorescent polymer (Formula I, II, III), an aromatic transparent unsaturated resin containing a phenyl or fluorene functional group (Formula IV, V), and a solvent of a cyclic compound, wherein the molecular structure of the aromatic transparent unsaturated resin is compatible to that of the fluorescent polymer. The invention further provides a fabrication method of a color conversion film including dispensing the disclosed ink composition on a substrate, and curing the ink composition to form the color conversion film.

Disclosed is a method of preparing a fluorescent polymer, whereby an ethylenically unsaturated monomer is copolymerized with a polynuclear aromatic hydrocarbon or a substituted aromatic derivative thereof, such that the resultant polymer is fluorescent. Also disclosed are coating compositions containing such fluorescent polymers.

A fluorescent article is disclosed comprising a polymer matrix comprising a polymer having in its backbone repeating units of a U.V. light absorbing moiety, or a moiety capable of being transformed by photo-Fries rearrangement into a U.V. light absorbing moiety, the matrix further comprising a fluorescent dye. The matrix affords surprisingly improved fluorescence protection as compared to prior fluorescent articles having only U.V. light absorbing additives.

A method to control a cooling water system based on the rate of consumption of a fluorescent polymer is described and claimed.

This invention relates to a method for dyeing polymer microspheres to obtain fluorescent polymer microspheres. The method comprises: uniformly mixing fluorescein 0.01-80%, polymer microspheres 0.1-80%, emulsifier 0-10%, tackifier 0-10%, and solvent (one or more of good solvents and poor solvents) 18.9-99.89%, dyeing under 1-101 kPa in dark for 1-720 h, taking out the dyed polymer microspheres, and washing repeatedly. The obtained fluorescent polymer microspheres have such advantages as simple process, high fluorescent brightness, wide fluorescent spectrum range, uniform particle size distribution and low relative standard deviation, and can be used as absolute counting microspheres of flow cytometry, fluoroimmunoassay microspheres, biosensor, microfluidic chip, and calibrator of fluorescence microscope.

The invention provides a fluorescent monomer and a fluorescent acrylic acid polymer and a preparation method of the fluorescent monomer and the fluorescent acrylic acid polymer. The monomer and polymer are respectively shown in formulas (I) and (2), wherein m is 1 or 2, n is 10-120, R1 is H or -CH3, R2 is -CH3, -CH2CH3,-CH2CH2CH3 or -CH2CH2(OH)CH3. The preparation method is as follows: reacting 4-bromine-1,8-naphthalic anhydride with n-propylamine so as to obtain N-propyl-4-bromine-1,8-naphthalimide; reacting the N-propyl-4-bromine-1,8-naphthalimide with ethanolamine so as to obtain N-propyl-4-(2-ethoxyamino)-1,8-naphthalimide; reacting the N-propyl-4-(2-ethoxyamino)-1,8-naphthalimide with PBr3 so as to obtain N-propyl-4-(2-bromomethylamino)-1,8-naphthalimide, and dropwise adding unsaturated compound dimethylaminoethyl methacrylate so that the fluorescent monomer is obtained; and condensing the fluorescent monomer with at least one crylic acid monomer. The fluorescent polymer can be used as a special scale inhibitor for a sea water circulating cooling or sea water desalinization system, and has a good scale dispersion property and a good fluorescent trace characteristic.

A method is provided for forming an electroluminescent device. The method comprises: providing a type IV semiconductor material substrate; forming a p+ / n+ junction in the substrate, typically a plurality of interleaved p+ / n+ junctions are formed; and, forming an electroluminescent layer overlying the p+ / n+ junction(s) in the substrate. The type IV semiconductor material substrate can be Si, C, Ge, SiGe, or SiC. For example, the substrate can be Si on insulator (SOI), bulk Si, Si on glass, or Si on plastic. The electroluminescent layer can be a material such as nanocrystalline Si, nanocrystalline Ge, fluorescent polymers, or type II-VI materials such as ZnO, ZnS, ZnSe, CdSe, and CdS. In some aspect, the method further comprises forming an insulator film interposed between the substrate and the electroluminescent layer. In another aspect, the method comprises forming a conductive electrode overlying the electroluminescent layer.

A method is provided for forming an electroluminescent device. The method comprises: providing a type IV semiconductor material substrate; forming a p+ / n+ junction in the substrate, typically a plurality of interleaved p+ / n+ junctions are formed; and, forming an electroluminescent layer overlying the p+ / n+ junction(s) in the substrate. The type IV semiconductor material substrate can be Si, C, Ge, SiGe, or SiC. For example, the substrate can be Si on insulator (SOI), bulk Si, Si on glass, or Si on plastic. The electroluminescent layer can be a material such as nanocrystalline Si, nanocrystalline Ge, fluorescent polymers, or type II–VI materials such as ZnO, ZnS, ZnSe, CdSe, and CdS. In some aspect, the method further comprises forming an insulator film interposed between the substrate and the electroluminescent layer. In another aspect, the method comprises forming a conductive electrode overlying the electroluminescent layer.

The invention discloses amphipathy photoswitch fluorescent polymer nano particles and a preparing method of the amphipathy photoswitch fluorescent polymer nano particles. Methyl methacrylate, polymerizable green fluorescence dye and a polymerizable photochromic compound are taken as monomers, hexadecane is taken as hydrophobe, a polyoxyethylene macromolecular chain transfer reagent is taken as a surface active agent, a one-step reversible addition-fragmentation chain transfer (RAFT) miniemulsion polymerization method is adopted for preparing the novel amphipathy photoswitch fluorescent polymer nano particles. The amphipathy photoswitch fluorescent polymer nano particles can emit intense macroscopic green or red fluorescence under irradiation of visible light and ultraviolet light, and have fast photoresponse capacity and good repeated fluorescence reversible switch performance. The amphipathy photoswitch fluorescent polymer nano particles have wide application prospects in the fields of cell imaging, bioanalysis, optical storage and the like.

Disclosed is a method for preparing fluorescent polymer beads, belonging to methods for preparing nano-material and micron material and aiming at providing a preparation method which requires no strict conditions and is easy and convenient to operate, and the raw materials are safe, easy to get, low in cost and high in reproducibility and efficiency. The method includes the following steps:(1)preparing stabilizing agent solution; (2) preparing monomer solution; (3)blending for reaction; (4)cleaning repeatedly for 3-5times; the deposit finally got is fluorescent beads. The invention is capable of preparing a plurality of fluorescent beads with even granularity distribution through dispersion-polymerization in one step; requirements to fluorescent dye are low, and the fluorescent dye is low in cost and is of no need to change the intrinsical structure of the fluorescein, thus avoiding changing the fluorescence and solving the problem that the fluorescent dye is easy to lose in direct adsorption method. The monodisperse particles of the fluorescent polymer beads prepared through the method are 1-5 microns and the fluorescent polymer beads are of high reproducibility and high efficiency and of no special compatibility to biological tissue cells.

The invention belongs to the technical field of preparation of carbon nanometer materials, and particularly relates to a polymer dot, a preparation method and an application thereof as the fluorescent material. The polymer dot with a fluorescent property is synthesized by linear non-conjugated polymers such as polyvinyl alcohol (PVA) under a hydrothermal condition. The non-conjugated polymers such as the PVA, polyetherimide (PEI), polyethylene glycol (PEG) or polyethylene oxide (PEO) are prepared into an aqueous solution with the concentration of 0.01-100mg / ml, the aqueous solution is transferred to a reaction kettle for hydrothermal reaction at a temperature of 160-250 DEG C for 2-10 hours, the reaction kettle is cooled to the room temperature after the reaction to obtain the polymer dot aqueous solution. The synthesized polymer dot not only has the fluorescent property, but also better maintains the properties of polymer chains. The polymer dot aqueous solution prepared by the PVA can emit aquamarine blue fluorescence under a portable ultraviolet lamp, and fluorescent screens and fluorescent filaments can be produced through methods such as spin coating and electrospinning simultaneously.

The invention relates to a composite material constructed by a molecular engram polymer and a fluorescence conjugated polymer and preparation and application thereof. The invention is characterized in the composite material consists of the fluorescence conjugated polymer, a connection unit and the molecular engram polymer, wherein the connection unit is used for the covalent connection between the side bond of the fluorescence conjugated polymer and the molecular engram polymer, meanwhile, the connection unit and the molecular engram polymer are in the covalent connection. The preparation process comprises the following steps: a functional monomer which can form the molecular engram polymer is introduced to the side chain of the fluorescence conjugated polymer through the covalent bond; and by taking various biological or / and chemical matter molecules as a template and adding a cross linking agent and an initiator, the polymerization reaction is initiated under the condition of heating or illumination, and a template molecule is removed by extraction, and the molecular engram- fluorescence conjugated polymer composite material which can detect various biological and chemical matter molecules simultaneously is obtained. The composite material can be used as a sensing material which can detect various biological and chemical matters simultaneously.

The present invention provides a highly reflective fluorescent polymer composition comprising a benzoxzolyl naphthalene optical brightener and a polymeric substrate support material formed into three dimensional articles or fibers. The enhanced light reflectivity of the instant compositions occurs over a wavelength range of from about 400 to 700 nanometers. The fiber embodiment comprises a body or support portion made of a flexible and durable thermoplastic material which is at least partially translucent and bis(benzoxazolyl)napthalenes optical brightener molecularly dispersed throughout the polymeric body potion of the fiber. The fibers are fluorescent to a UV source and can be effectively utilized for artificial hair for toy dolls as well as for various other textile applications.

The invention discloses a magnetic fluorescent polymer microsphere with high load stability and a preparation method of the magnetic fluorescent polymer microsphere, belonging to the technical field of functional polymer materials. The preparation method comprises the following steps: on the basis of polystyrene-divinylbenzene copolymer microsphere the surface of which is carboxylated, obtaining multi-stage pore polymer microspheres with pore size ranging from 0.4nm to 15nm adopting a micropore knitting method firstly; and then successively loading magnetic particles and fluorescent matters by using an in-situ coprecipitation method and a swelling method to obtain the magnetic fluorescent polymer microspheres with the particle size being 1-10 microns. With the adoption of the preparation method, the multi-stage pore polymer microspheres can be controlled within a scale range equivalent to the loaded magnetic fluorescent material, and then with fixed functions combined with a functional group, the loading function and the stability of the magnetic fluorescent material are remarkably improved, flexible loading of the functional microspheres with different magnetic strengths, different fluorescent strengths and different fluorescent wave lengths can be further realized, and thus the preparation method has an important application value in the biological medicine field.

The invention belongs to the field of a functional high molecular material, and particularly relates to a series of side chain type electroactive fluorescent polymers, a preparation method and use for detecting an oxidizing or reducing substance. Fluorescence detection of the oxidizing or reducing substance is realized by utilizing the characteristic that the fluorescence intensity of the electroactive fluorescent polymer reversibly changes along with an oxidation reduction state of an aniline chain segment. The preparation method comprises the following steps of: synthesizing the fluorescentpolymer containing the aniline chain segment and a fluorescent group on a side chain through a ternary polymerization method; after preparing polymer into solution, keeping the aniline chain segment in the polymer in a reducing state or intermediate oxidizing state by using a chemical oxidation reduction method or electrochemical method; and then testing a fluorescence response situation of the aniline chain segment to the oxidizing or reducing substance by using a fluorescent spectrometer. The detection method has the advantages of wide variety of detection objects, high stability, low detection lower limit, reusability and the like, and has extremely broad application prospect in the fields of biology, chemistry, foods, environment and the like.

The invention discloses cysteine and citric acid derivative fluorescent powder and a preparation method therefor, and belongs to the field of fluorescent materials. According to the preparation method for the cysteine and citric acid derivative fluorescent powder, natural products cysteine and citric acid are adopted as raw materials, and the raw materials react in oleic acid to prepare fluorescent polymer with a high quantum yield; and the fluorescent polyme emits bright blue light under irradiation of 365nm ultraviolet light. The synthesized product is characterized by ultraviolet light, fluorescent light and the like, wherein the quantum yield of the fluorescent polymer can reach 74.2%. The cysteine and citric acid derivative fluorescent powder is coated on a silica-gel carrier so as to obtain light-emitting fluorescent powder. The invention provides a method for synthesizing polymer with a high fluorescence quantum yield from biocompatible nonfluorescent raw materials, and a method for simply preparing the fluorescent powder.

The invention discloses a novel polymer fluorescent material which takes a Beta-dione aggregative structure as a fluorescent luminophor and can be prepared through emulsion polymerization, solution polymerization and body polymerization. The luminous material can be a polymer emulsion or aggregative state solid and film. The invention is characterized in that a polymer is successfully dispersed in a water medium by adopting a novel emulsion polymerization technology to form nano-grade emulsion particles and the polymer forms a Beta-dione aggregative luminous fluorescent structure in a nano limit space. The Beta-dione aggregative luminous fluorescent structure acts with substances of an amine group to form a fluorescent composite so that the polymer emulsion has remarkably enhanced fluorescence and emits strong macroscopic fluorescence under UV light. When the polymer forms an aggregative state solid or film, the Beta-dione aggregative structure emits fluorescence which can be further enhanced by the substance containing the amine group. The material has no toxicity or nocuity and environment protection.

Compositions, methods and related apparatus, as can be used for selective pathogen detection and identification.

A methacrylate fluorescent monomer with thiazolepyridine structure and a preparation method thereof are disclosed. The methacrylate fluorescent monomer with the thiazolepyridine structure is prepared using thiazolepyridine-3-carboxyl and hydroxyethyl methacrylate as starting materials or thiazolepyridine-3,7-dicarboxyl and hydroxyethyl methacrylate as starting materials. A synthetic method of the invention has few side products, the prepared methacrylate fluorescent monomer is high in product purity and high in quantum yield, the synthetic method is simple to operate, has mild reaction conditions and allows large-scale preparation and easy industrialization, and fluorescent polymers are easy to prepare through polymerization reaction.

The invention relates to a fluorescent monomer, a fluorescent tracing polymer and its preparation method. Its synthetic method comprises the following steps of: dissolving 7-diethylamino-4-methylcoumarin in a solvent, adding dropwisely bromopropylene, heating, cooling to obtain the fluorescent monomer allyl-7-diethylamino-4-methylcoumarin-ammonium bromide, and copolymerizing the fluorescent monomer with acrylamide and acrylic acid. The fluorescent polymer can be used as an oil field tracer to be applied in oilfield water-flooding and polymer flooding processes, and has good fluorescent tracer ability and chemical stability.