34 results about "Fluorescent polymer" patented technology

This invention discloses a photosensitive supramolecular fluorescent polymer, its preparation method, and its anti-counterfeiting application in water, using trifluoroethyl methacrylate, hexafluorobutyl acrylate, 4-(acryloyloxy)butyl4-(2-methyl-3-(2-(2-methylbenzo[b]thiophen-3-yl)-4-oxo-5,6-2H-4H-thiaran[2,3-)b]thiaran-3-yl)benzo[b]thiophen-6-yl)-4-oxobutyrate, 4 This polymer was prepared by a simple one-step free radical copolymerization method using 1,1-(acryloyloxy)butyl3-(3,3,4,4,5,5-hexafluoro-2-(2-methyl-1,1-dioxide benzo[b]thiophene-3-yl)cyclopent-1-en-1-yl)-2-methylbenzo[b]thiophene-6-carboxylate 1,1-dioxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (photoinitiator-819) as raw materials. The polymer exhibits excellent multicolor light-switching performance, high stretch ratio, high self-healing efficiency, strong substrate adhesion, and antifouling properties, especially demonstrating excellent stability under strong acid, strong alkali, and high salt environments. The synthetic route is simple, and it has great application potential in underwater anti-counterfeiting and encryption technologies.

Polymer dots comprising a functionalized fluorescent polymer and an amphiphilic molecule are provided.

The application discloses a one-step preparation method of fluorescent single-chain polymer nanoparticles, and particularly relates to the field of high polymer chemistry. The method comprises the following steps: dissolving polyethylene glycol methyl ether methacrylate, cyanostilbene methacrylate monomer and an initiator in a ninth solvent to obtain a reaction solution; performing a polymerization reaction on the reaction solution under a nitrogen environment to obtain poly((Z)-2-(2-(2-(2-(4-(2-cyano-2-(3,4,5-tri(dodecyloxy)phenyl)vinyl)hydroxyethoxy)ethoxy)ethoxy)ethoxy)methyl acrylate-polyethylene glycol methyl ether methacrylate); dissolving the product in water to obtain a copolymer solution; irradiating the copolymer solution under a UV lamp; and performing freeze-drying separation to obtain fluorescent single-chain polymer nanoparticles. The one-step preparation of the fluorescent polymer single-chain nanoparticles is realized.

A layer structure having a solid substrate having a surface, the surface carrying a layer including a molecularly imprinted polymer, wherein the molecularly imprinted polymer is adapted to bind a glyphosate analyte, wherein the glyphosate analyte is selected from glyphosate, a glyphosate degradation product, a metabolite of glyphosate or a metabolite of the degradation product of glyphosate, wherein a fluorescence characteristic of the molecularly imprinted polymer changes upon binding of the glyphosate analyte. Further, a method for detecting a glyphosate analyte in a sample includes: providing the layer structure having the molecularly imprinted polymer; providing a fluidic contact of the layer structure with the sample or an organic extract of the sample; measuring a fluorescence property of the layer structure; and estimating a concentration of glyphosate or of the glyphosate related analyte at least semi-quantitatively.

The present application belongs to the technical field of environmental detection, and particularly relates to a Turn-On type fluorescent polymer, a synthesis method thereof and application of the fluorescent polymer in detecting uranyl ions. The present application ingeniously uses the structural characteristics of tetraphenyl ethylene tetracarboxaldehyde to synthesize a fluorescent polymer TPE-COPs having a fluorescence enhancement response to uranyl ions at normal temperature. The fluorescent polymer is a "Turn-On" type fluorescent polymer, has advantages of high sensitivity, high selectivity and rapid response in detecting uranyl ions, can simultaneously improve the sensitivity and anti-interference ability, realizes all-round consideration of the detection limit, the detection range and the selectivity, and shows great potential and value in biomedical research and application. Meanwhile, the fluorescent polymer TPE-COPs of the present application can be completed at room temperature, has a simple process, does not need harsh environments such as high temperature, high pressure and oxygen-free, and is more suitable for industrial scale production application.

The application provides a single-chain super-small fluorescent polymer nanodot modified Bacillus subtilis derived nanometer calcium carbonate composite material (SC-PNPs@CaCO3) as a high-sensitivity fluorescent sensing platform for choline acetyltransferase (ChAT) activity detection. The composite material is synthesized through biological mineralization of Bacillus subtilis, the free radical polymerization method is used to prepare the SC-PNPs with positive charges on the surface, and a stable fluorescent sensing system is constructed through self-assembly. Coenzyme A (CoA) is generated in the ChAT catalytic reaction, which can significantly quench the fluorescent signal of the material, realize high-sensitivity detection of the ChAT activity change, and the detection limit reaches 0.00074 mU / mL. The fluorescent sensing platform can realize real-time monitoring of the ChAT activity change, and reveal the regulation effect of the cholinergic signal pathway in the repair process in a skin repair model. The application provides an innovative technical means for choline acetyltransferase activity analysis, and provides a new research direction for exploring the function of the cholinergic system in skin repair and other physiological and pathological processes.

The application discloses a preparation and application of a chiral selective optical filter. The chiral selective optical filter is a chiral film obtained by spin coating of chiral silver clusters; the chiral silver clusters are obtained by coordination reaction of chiral molecules containing mercapto and silver ions; the chiral molecules containing mercapto can be obtained by breaking disulfide bonds of L / D-cystine derivatives. The optical filter has important applications in biological medicine, optical information storage and encryption, optical devices and CP-LED. The corresponding circularly polarized signals can be obtained by using the optical filter, i.e. exciting a light emitting unit and then obtaining the circularly polarized signals through the chiral selective optical filter. The light emitting unit is a non-chiral organic dye molecule, inorganic phosphor material or fluorescent polymer microsphere. The optical filter is located at the rear side of the light emitting unit. The application can obtain the corresponding better circularly polarized signals by using the non-chiral light emitting unit through the chiral selective optical filter, and the preparation method is simple and has strong operability.

A multi-functional near-infrared fluorescent polymer dot (Pdot)-siRNA nanoplatform is disclosed herein. The disclosed technology addresses challenges in siRNA delivery, including poor stability, degradation, and immune recognition, by utilizing positively charged Pdots synthesized from polymers, and electrostatic binding with negatively charged siRNA. The Pdots exhibit dual fluorescence emission at 588 nm and 775 nm, enabling real-time visualization of cellular uptake and siRNA delivery. The nanoplatform demonstrates efficient inhibition of target gene expression, and protein levels in cells. The Pdots provide minimal toxicity and persist in cells for extended periods, offering a robust tool for therapeutic applications, bioimaging, and molecular labeling. This approach combines siRNA delivery with simultaneous imaging, presenting a versatile method for targeted gene regulation and research applications.

This invention relates to the field of fluorescent polymer technology, specifically to a linear fluorescent polymer and its preparation method. The solid-state fluorescence quantum yield of linear fluorescent polymers obtained by reacting tertiary amines with activated alkyne monomers is difficult to reach 10%. Based on the above problem, this invention provides a linear fluorescent polymer obtained by triggering click reactions between a monohydric secondary amino alcohol and an activated alkyne monomer. In this invention, during the click reaction between the monohydric secondary amino alcohol and the activated alkyne monomer, the amino group first reacts with the alkyne group, followed by the hydroxyl group. This results in a higher quantum yield in the obtained fluorescent polymer, exhibiting a high solid-state fluorescence quantum yield, easily reaching over 10%, and even exceeding 20%, achieving better technical results.

The invention discloses a triphenylmethyl free radical polymer with light-sensitive and heat-sensitive characteristics. The triphenylmethyl free radical polymer shows the characteristic that fluorescence can be regulated and controlled. The polymer is dissolved in a solvent, after 365 nm ultraviolet irradiation, free radical signals are weakened, fluorescence is subjected to blue shift, and the maximum emission wavelength is shifted to 470 nm, so that the cyan-blue fluorescent polymer is obtained. After the blue fluorescent solid is heated at 120 DEG C for 2 hours, the free radical signal is enhanced, and the fluorescence reversibly shifts back to the initial red (682 nm). The illumination and heating regulation process can be circulated for multiple times, which shows that the fluorescence of the triphenylmethyl free radical polymer has reversible regulation. The triphenylmethyl free radical polymer disclosed by the invention has the advantages of simple process and convenience in operation due to the fluorescence regulation characteristic, and the obtained fluorescent polymer has application potential in the field of luminescent materials.

A dual-layer optical encryption fluorescent polymer waveguide chip based on optical pulse code modulation technology belongs to the field of functional photonic chip technology. It consists of a substrate layer, a buffer layer, a cladding layer, a bottom waveguide layer, and a top waveguide layer. The cladding layer is divided into three parts: a lower cladding layer, a middle cladding layer, and an upper cladding layer. The bottom waveguide is located within the middle cladding layer, and the top waveguide is located within the upper cladding layer. The bottom and top waveguides do not overlap in the chip's top-view plane. The waveguide layer material is obtained by doping fluorescent small-molecule oligomer chromophores into a polymer material. This invention achieves signal optical pulse coding by modulating the pump light power intensity. By detecting changes in optical transmission loss in the fiber optic system, it determines whether eavesdropping has occurred. Eavesdropping is indicated by optical transmission loss exceeding a threshold. False information is displayed in the bottom waveguide for disguise, while the modulated information is transmitted encrypted through the top waveguide, thus solving the problems of limited controllability and insufficient security in traditional encryption technologies.

The invention relates to a high-tensile-strength fluorescent self-repairing polyolefin material as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials. In order to solve the problems of poor mechanical properties and lack of self-repairing function of the existing fluorescent polymer, the invention adopts a phosphine-palladium sulfonate catalyst to efficiently catalyze binary or ternary polymerization of ethylene, a coumarin / anthracene / carbazole / triphenylamine / tetraphenylethylene / pyrene-containing polar fluorescent monomer and dicyclopentadiene (DCPD) to obtain the self-repairing polymer. The functional unit is successfully embedded into a polyolefin main chain through a covalent bond. The material shows excellent comprehensive performance: the tensile strength of the material reaches up to 46.79 MPa, and the elongation at break can reach 732%, which are far better than those of similar materials; under the ultraviolet light of 365 nm, the coating has the strong fluorescence characteristic and the efficient self-repairing capacity, and scratches can be completely healed within 30 minutes; in addition, high-resolution patterning can be realized by utilizing the photoinduced fluorescence quenching effect. The invention provides a brand new strategy for preparing an intelligent polyolefin material with excellent mechanical property, damage visualization and self-repairing capability, and has important application value in the frontier fields of information encryption, intelligent sensing, flexible electronics and the like.

The invention discloses a thermal activation delayed fluorescence polymer material based on an octahydrobinaphthalene skeleton and an optical strain film sensor thereof. A pair of chiral thermally activated delayed fluorescence polymers (R / S)-Fr are synthesized through iodination, nucleophilic substitution and Suzuki coupling copolymerization with octahydrobinaphthol as a chiral unit, and the chiral thermally activated delayed fluorescence polymers (R / S)-Fr have good film-forming property, thermal stability and thermally activated delayed fluorescence characteristics. The obtained thermally activated delayed fluorescent material is blended with an elastomer SEBS, an optical strain film sensor is prepared through a spin-coating process, the sensor is in linear response within the strain range of 0%-30% and 30%-60%, the maximum fluorescence amplification reaches 26 times, and the cycling stability and the environmental stability are excellent. The preparation method is simple in process and high in operability, and has a wide application prospect in the field of optical sensing.

The application provides application of a hyperbranched conjugated fluorescent high polymer in fluorescence detection of gasoline, diesel and kerosene, and relates to the technical field of organic synthesis and fluorescence sensing. The hyperbranched conjugated fluorescent high polymer has a structure shown in general formula (I), and is characterized in that a triethynylbenzene structure in the center of the polymer is subjected to a sonogashira coupling reaction with a hydroxyl-substituted benzene derivative to form a two-dimensional network structure, thereby bringing excellent sensing performance to a sensitive film; the sensitive film has on-site rapid detection sensitivity and sub-second (less than 1s) rapid response capability for gasoline, diesel and kerosene, meets on-site emergency detection requirements, and can realize effective anti-interference capability for various substances, and realizes high selectivity detection in a complex matrix environment.

The application discloses a tetraphenyl ethylene-based fluorescent monomer and a preparation method and application thereof, and belongs to the technical field of polymer light-emitting materials.The application connects a tetraphenyl ethylene group containing an aggregation-induced emission active group with a specific polymer skeleton to prepare a fluorescent monomer.The fluorescent polymer prepared by using the fluorescent monomer and a specific polymerization monomer can be used for detecting copper ions, and has high sensitivity and good repeatability during detection, and visual observation can be realized.

The application discloses a coral-like nitrogen-sulfur co-doped carbon fluorescent polymer and a preparation method and application thereof, and the method is to synthesize a novel coral-like water-soluble nitrogen-sulfur co-doped carbon fluorescent polymer by a one-step hydrothermal method, with p-aminobenzenesulfonic acid, sodium hydroxide and DMSO as raw materials.The coral-like nitrogen-sulfur co-doped carbon fluorescent polymer has the advantages that: (1) when the coral-like nitrogen-sulfur co-doped carbon fluorescent polymer is applied as a fluorescent probe for pH detection, the coral-like nitrogen-sulfur co-doped carbon fluorescent polymer has good selectivity and high sensitivity, and has a short response time and can realize real-time detection; (2) the polymer has superior optical properties and good water solubility; when the polymer is applied as a fluorescent probe for pH detection, the polymer has good selectivity and high sensitivity, and has a short response time and a linear range of 3.0-9.0 for pH response.The fluorescent probe can be used for pH detection of commercially available phosphate buffer, and the result is consistent with the result measured by a laboratory pH meter, and the above results show that the prepared fluorescent probe has practical application potential in biochemical research.

The present invention is directed to nanoparticle-polymer composites for efficient emission of light. Certain nanoparticle-polymer composites of the present invention have been found to exhibit higher photoluminescence quantum yield and narrower photoluminescence linewidth than the same materials disposed in liquid solvents. In some embodiments, the composites include quantum dots that have a first semiconductor core material made from CuInSexS2-x, CuInGaSexS2-x, AgInSexS2-x, AgInGaSexS2-x, PbS, PbSe, InAs, InP, Cd3P2, CdS, CdSe, and CdTe semiconductor compositions. In some embodiments the composites include a polyolefin elastomer polymer. Furthermore, the tunability of emission peaks from these novel fluorescent polymer composites make them suitable for down-conversion of visible and UV light into visible and NIR light. In some embodiments these nanoparticles are incorporated into solar modules to improve power conversion efficiency.

The present application relates to the technical field of fluorescent sensor, in particular to a method for regulating the wavelength emission of aliphatic amine type unconventional fluorescent polymer to sequentially red shift. At present, there is a lack of method for regulating the fluorescent color of aliphatic amine type non-conjugated fluorescent polymer to sequentially change from blue light to red light. In view of the above technical problem, the present application provides a method for regulating the wavelength emission of aliphatic amine type unconventional fluorescent polymer to sequentially red shift. The method is for aliphatic amine type unconventional fluorescent polymer, by sequentially changing the length of straight-chain secondary amine alcohol carbon chain, the type of substituent group on the amino group and the relative position of amino group and alkyl alcohol hydroxyl group in the reaction raw material, so that the aliphatic amine type unconventional fluorescent polymer sequentially red shifts according to the adjustment order. The method is simple, controllable and environmentally friendly, and has good application prospect in the fields of fluorescent sensor, biomedical imaging, photodynamic therapy and the like.

The invention relates to the technical field of fluorescence detection, in particular to temperature-sensitive fluorescent composite hydrogel for amino acid fluorescence detection and a preparation method of the temperature-sensitive fluorescent composite hydrogel. Traditional fluorescent hydrogel is not sensitive enough to fluorescence detection signals of amino acid. In order to solve the problems, the invention provides the temperature-sensitive fluorescent composite hydrogel for amino acid fluorescence detection, which is a product obtained by adsorbing and wrapping a phenanthrene-based quaternized fluorescent polymer into a three-dimensional polymer network structure of the hydrogel through a hydrophilic effect in a process of crosslinking temperature-sensitive xerogel in an aqueous solution to form the hydrogel, the hydrogel can generate rapid fluorescence response in the presence of amino acid, the detection time is short, and the detection efficiency is high. The three-dimensional network of the phenanthryl quaternized fluorescent polymer molecules and the temperature-sensitive hydrogel forms a physically wound double-network structure, so that the sensitivity of amino acid fluorescence detection is improved.

The invention relates to the technical field of fluorescent polymers, in particular to a non-conjugated fluorescent polymer independent of excitation wavelength. The emission wavelength of the traditional non-conjugated fluorescent polymer depends on the change of excitation wavelength, and fluorescent signal interference is easily generated. In order to solve the problems, the invention provides the non-conjugated fluorescent polymer independent of excitation wavelength, the non-conjugated fluorescent polymer is a fluorescent polymer obtained by carrying out click polymerization reaction on secondary amine alcohol or primary amine monomer and activated alkyne monomer, and the non-conjugated fluorescent polymer has a light-emitting structure with specific spatial conformation. Decoupling of excitation wavelength and emission wavelength is achieved, stable emission wavelength can be kept in a wide excitation wavelength range, and the defect of signal interference of a traditional non-conjugated fluorescent material is effectively overcome.

The invention discloses a fluorescent elastic fiber with dual response and a preparation method thereof. The synthesis of the fluorescent polymer and the preparation of the fluorescent elastic fiber are specifically covered. When the environment temperature rises, the fluorescence intensity of the fiber is obviously changed (light response) and is accompanied by reversible shrinkage deformation (mechanical response). Based on the double response characteristics, the method realizes high-sensitivity and visual early warning of temperature abnormity, has potential application value in the fields of industrial equipment overheating monitoring, intelligent protection equipment and the like, and provides a new thought and scheme for development of functional materials and temperature early warning technology.

This invention discloses an aromatic amine polymer containing a sulfone group and its preparation method, belonging to the field of polymer chemistry. The main chain of this sulfone-containing aromatic amine polymer contains the structural segment shown in formula (I): Formula (I); wherein R is selected from alkyl groups having 4 to 12 carbon atoms. This sulfone-containing aromatic amine polymer introduces large-volume aryl sulfone structures on both sides of the nitrogen atom, forming a significant steric hindrance effect. Simultaneously, the strong electron-withdrawing effect and structural stability of the aryl sulfone structures on both sides result in a fluorescent polymer with improved acid resistance and hot water stability.

The application discloses an azobenzene-based heterochain fluorescent polymer and a preparation method and application thereof, and relates to the technical field of heterochain polymer luminescence. The method uses azobenzene epoxide alkane as raw material, and obtains the azobenzene-based heterochain fluorescent polymer through bulk polymerization, melt polymerization or solution polymerization under the action of a catalyst; the azobenzene-based heterochain fluorescent polymer obtained by the method has good solubility in various organic solvents, and the luminescence property of the polymer can be changed by adjusting the concentration and inducing photoisomerization of the azobenzene group, so that the azobenzene-based heterochain fluorescent polymer has good application potential.

The invention belongs to the technical field of fluorescent polymer synthesis, and provides a ratio-type fluorescent probe for detecting the polarity of a lipid droplet, and a preparation method and application of the ratio-type fluorescent probe. The structural formula of the fluorescent probe is shown in the specification. The compound can be prepared into a fat droplet tracer for detecting cells or organisms or a reagent for detecting polarity change of fat droplets. The probe is strong in water solubility and good in light stability, can be developed into a good biocompatibility lipid droplet tracing and polarity detection reagent, and has wide application value in medical diagnosis and clinic.

The invention discloses a scorpion fluorescent polymer film as well as a preparation method and application thereof, the film is prepared by blending fluorescent structure macrocyclic phthalate extracted from scorpion cuticle, butyl acrylate and N-isopropylacrylamide, and the film has a structure as shown in a formula (I). While the macrocyclic phthalic acid ester is doped, the butyl acrylate and the N-isopropylacrylamide are subjected to free radical copolymerization, and the macrocyclic phthalic acid ester is bonded with a polymer chain through a hydrogen bond. The preparation method has the advantages that (1) macrocyclic phthalate is used as an additive to prepare the fluorescent film, so that the transparency is good, and the mechanical property is excellent; (2) macrocyclic phthalate is added in a blending manner, so that the shielding effect on ultraviolet rays is outstanding; and (3) the preparation process is simple, the structure is stable, and the method is suitable for large-scale preparation. Formula (I)

An emissive layer for a stretchable organic light emitting diode (OLED) comprises a plasticized film including a thermally activated delayed fluorescence (TADF) polymer and a plasticizer distributed within the TADF polymer. A method of making an emissive layer for a stretchable organic light emitting diode (OLED) comprises co-dissolving a plasticizer and a thermally activated delayed fluorescence (TADF) polymer at a predetermined ratio in a solvent to form a precursor mixture, depositing the precursor mixture onto a substrate to form a coating, and removing the solvent from the coating to form a plasticized film comprising the TADF polymer and the plasticizer distributed in the TADF polymer.

The application discloses a ketone-containing arylamine polymer and a preparation method thereof, and belongs to the technical field of polymer chemistry. The main chain of the ketone-containing arylamine polymer contains a structural fragment shown in formula (I): formula (I); wherein R is selected from one of alkyl with 4-12 carbon atoms. The ketone-containing arylamine polymer introduces bulky aryl ketone structures on both sides of a nitrogen atom, forms a significant steric hindrance effect, meanwhile, the strong electron-withdrawing effect of the aryl ketone structures on both sides is achieved, and thus a fluorescent polymer with intrinsic acid resistance and oxidation medium stability is obtained.

The application relates to the field of new materials, and discloses a multifunctional monodisperse homogeneous fluorescent microsphere, a fluorescent microsphere with a core-shell structure and a preparation method. The average particle size of the monodisperse homogeneous fluorescent microsphere is 80-500 nm, the PDI is 0.008-0.182, and the fluorescent peak value is 415-625 nm. The fluorescent polymer microsphere with homogeneity and a core-shell structure is prepared by using the monodisperse homogeneous fluorescent microsphere, the brightness of the above microsphere is controllable, the microsphere is high in light emission efficiency, and the microsphere shows great application potential in the fields of biomedicine, electronic information, analysis and detection and the like.

The application discloses a controllable response type fluorescent polymer material and a preparation method and application thereof. The controllable response type fluorescent polymer material is prepared by mixing and reacting a fluorescent monomer solution, a solvent, an acrylamide compound, a metal salt, water, a crosslinking agent solution, a promoter and an initiator. The fluorescent detection material is fixed in a three-dimensional network with stable structure in a covalent bond form through a chemical copolymerization technology, so that disordered migration of the fluorescent detection material in a production, storage and detection process is avoided, the stability of detection is effectively improved, and good result reproducibility is ensured.

The invention discloses a boron-containing solid-liquid double-state fluorescent polymer material with solvent polarity responsiveness. The boron-containing solid-liquid double-state fluorescent polymer material with solvent polarity responsiveness can emit light in both solid and liquid states, and after the polymer is dissolved in organic solvents with different polarities, the solution fluorescence can be subjected to red shift along with the increase of the polarity of the solvents and can be subjected to red shift from cyan blue to yellow green. The invention also provides a preparation method of the boron-containing solid-liquid double-state fluorescent high polymer material with solvent polarity responsiveness, the synthesis method is simple in process, convenient to operate and low in cost, the application of the material in the field of fluorescence detection is greatly widened, and the material has a good application prospect on the basis of the unique and sensitive fluorescence response characteristic of the material to the solvent polarity. The fluorescent probe shows relatively important application potential in the fields of fluorescence sensing, chemical detection, microenvironment probes and the like, and is expected to be widely applied to the leading edge directions of environment monitoring, biomedical detection and the like.