81results about How to "Has fluorescent properties" patented technology

The invention relates to a preparation method of magnetic fluorescence dual-function silicon oxide hollow microspheres, comprising the steps of: preparing magnetic nanometer particles by a coprecipitation method; diffusing the magnetic nanometer particles in long-chain alkane after the surfaces of the magnetic nanometer particles are modified by oleic acid; mixing the oil phase composed of alkanedispersion consisting of a styrene monomer, a superhydrophobic agent and magnetic nanometer particles, and the orthosilicic acid alkyl ester with water phase in which a surface active agent is dissolved; pre-emulsifying and finely emulsifying the mixture to obtain a fine emulsion drop system; when the drops are in free radical polymerization, adding an alkali catalyst to control the generation ofsilicon oxide and the phase separation of the organic and inorganic components of the system; in the reaction process, adding proper ammonia water and a silane coupling agent which is marked by fluorescein to obtain the hollow compound microspheres which are different in sizes, inorganic shell thicknesses and magnetic particle solid content and have stable fluorescence signals. The preparation method disclosed by the invention is simple, the raw materials are low in cost and easy to obtain; and the obtained fluorescence dual-functional hollow silicon oxide microspheres are narrow in size distribution, high in magnetic substance content and stable in fluorescence performance.

The invention discloses a fluorescent block-grafted copolymer with temperature sensitivity and a preparation method and application thereof. According to the fluorescent block-grafted copolymer and the preparation method and application of the fluorescent-block-grafted copolymer, an acrylate monomer containing a fluorophore is copolymerized with methacrylic glyceride through atom transfer radical polymerization to introduce an azide group to an epoxy group on the side chain, and then, a polymer with temperature response is grafted to the copolymer through clicking chemical reaction so as to form the block-grafted copolymer; and the reaction conditions are mild, and the conversion rate is high. The fluorescent block-grafted copolymer and the preparation method and application of the fluorescent block-grafted copolymer have the advantages that the polymer with temperature response is initiatively polymerized with the side chain of the copolymer with a fluorescence effect through grafting, so that the macromolecular polymer not only has fluorescent characteristics, but also the temperature response, side chain length and hydrophilicity strength of the macromolecular polymer can be controlled through adjusting the length of hydrophilic side chains and grafting efficiency, and the controllable adjustment is realized; and the structure of the copolymer is provided with hydrophilic chain segments, so that not only can kernel fluorescent chromophores be protected, but also the chromophores can be gathered together, thereby improving fluorescence response sensitivity.

In the spinning raw material for producing polyurethane fibre the rare earth element substances can be added, the described rare earth element substances include rare earth halide and rare earth complex. The rare earth elements can be combined with fibre high-molecular matrix by means of coordinate bond, so that its mechanical property can be raised. The tests show that the breaking tenacity, breaking elongation rate and rebound elasticity of polyurethane fibre in which the rare earth element substances are added are improved.

A high-specificity fluorescent probe of human carboxylesterase CES2 and an application thereof. A substrate of the high-specificity fluorescent probe is an ester derivative of a 3-hydroxyl flavonoid compound, which can be used for detecting the existence of the CES2 in different bio-samples and quantitatively measuring the activity of the CES2. A particular measurement process of the enzyme activity includes following steps: selecting a hydrolysis reaction of the derivative of the 3-hydroxyl flavonoid compound as a probe reaction; selecting generation amount of a hydrolytic metabolite, 3-hydroxyl flavonoid, in unit time through quantitative detection with selection of a proper substrate concentration in a linear reaction section so that the actual activity of the CES2 enzyme in various bio-samples, cells, in-vivo organs and overall organs can be measured. The high-specificity fluorescent probe not only can be used for quantitative evaluation of the enzyme activity of the CES2 in the bio-samples from different sources, but also can be used for in-vitro quickly screening an inhibitor of the CES2 by means of the probe reaction.

The invention provides a sericin hydrogel, a preparation method and an application thereof. The preparation method comprises the following steps: 1) extracting sericin and preparing the sericin to powder, 2) preparing hydrazide-modified sericin and preparing the sericin to powder, 3) preparing oxidized glucan and preparing the glucan to powder, 4) preparing a hydrazide-modified sericin solution and an oxidative glucan solution, and 5) mixing the hydrazide-modified sericin solution and the oxidative glucan solution to prepare the sericin hydrogel. The sericin hydrogel has good biodegradability and biocompatibility, a plurality of macromolecular and micromolecular drugs are carried by taking sericin hydrogel as a drug carrier, and the sericin hydrogel can be injected into body for releasing the drugs through hypodermic injection or intramuscular injection. The hydrogel has fluorescence characteristic, can be degraded through fluorescence monitoring gel and can be realized. The sericin hydrogel can be used for skin restoration. The sericin hydrogel scaffold can be obtained through freeze drying, and can be used as a biomedical material.

The preparation method of polypropylene compound material capable of sednign blue-green light under the action of UV light irradiation is characterized by adopting cation exchang method to modifying laminate inorganic nano montmorillonoid material, dispersing agent and organic intercalation agent, then combine them with polypropylene so as to prepare the compound material with fluorescence property. Said prepared compound material can be used as polymer fluorescent material or fluorescence marking material, specially it can be used in application field having need of blue-green light, also can be used as agricultural film.

The invention discloses a method for synthesizing 4-phosphonic acid-1,5-substituted-1,2,3 triazole compounds through catalysis of an ionic liquid and belongs to the technical field of synthesis of the triazole compounds. The technical scheme is characterized in that azide compounds and phosphorus ester compounds are taken as substrates, the ionic liquid is taken as a catalyst, methyl alcohol is taken as a solvent, the materials are subjected to stirring reaction at the temperature of 25-50 DEG C, and the 4-phosphonic acid-1,5-substituted-1,2,3 triazole compounds are prepared. The reaction time for the synthesis method is shorter, the reaction conditions are mild, the reaction temperature is 25-50 DEG C, the method requires no metal catalyst while a traditional click reaction requires transition metal as a catalyst, and accordingly, toxicity of metal ions is greatly reduced; phosphorylation is a method capable of improving properties of an index compound, with the introduction of a phosphoric acid group in drug design, the water solubility of the compound can be improved, so that bioavailability is improved, and part of prepared compounds have the fluorescence characteristic.

The invention discloses a preparation method of a fluorinated polyacrylic copolymer antibacterial composite material and a obtained product and application thereof. A fluorine-free acrylic monomer andA fluorine-containing acrylate monomer are polymerized to form a fluorine-containing polyacrylic copolymer, and then the fluorine-containing polyacrylic copolymer is appropriately cross-linked to form a copolymer with a certain degree of crosslinking. Finally, the crosslinked copolymer is compounded with an antibacterial agent to form a composite antibacterial material. The preparation method ofthe invention has relatively mild reaction conditions, simple operation, and high sample yield. The obtained antibacterial composite material has the characteristics of antibacterial adhesion, sterilization, pH responsiveness, and fluorescence. The product can be made into a film or coating use on the surface of a product, not only can prevent adhesion of bacteria, dust and the like, but also canefficiently kill the bacteria attached thereon, prevent the reduction of bactericidal efficiency caused by the adhesion of dead bacteria or live bacteria. The product has good antifouling and antibacterial effects, and has good application prospects in the fields of medicine, biology, health, food and the like.

The invention discloses an ultraviolet cured rare earth polymer material and a preparation method thereof. The ultraviolet cured rare earth polymer material includes the following components in percentage by weight: 1%-20% of rare earth and acrylic acid complex, 40%-60% of urethane acrylate, 30-50% of active diluent, 1%-10% of photoinitiator and the balance of auxiliaries. The ultraviolet cured rare earth polymer material has the advantages that the rare earth and acrylic acid complex and the matrix resin are subjected to polymerization reaction, thus being good in consistency; the rare earth and acrylic acid complex modified resin is good fluorescence property and wide in ultraviolet absorption peak that the range stretch across the ultraviolet and near-ultraviolet areas; as the coating prepared by the above materials has the characteristics of being quick in photocuring speed, good in film property and friendly to environment; the film can be used for ultraviolet cured paint and luminous paint.

The invention provides a nuclear-shell nanogold composite material and a preparation method and application. The preparation method comprises the following steps: CTAB, a chloroauric acid solution, a silver nitrate solution, an ascorbic acid solution and a sodium borohydride solution are mixed to obtain a gold nanorod solution; a TEOS methanol solution is dripped after ultrasonic processing of the gold nanorod solution for the reaction to prepare a mesoporous silicon dioxide gold nanorod solution; an APTES methanol solution is added for an amination reaction to obtain an aminated mesoporous silicon dioxide gold nanorod solution; and a gold nanocluster solution is fed in the aminated mesoporous silicon dioxide gold nanorod solution for a reaction to obtain the nuclear-shell nanogold composite material. The material improves the photothermal performance of gold nanorods, enables gold nanorod carriers to achieve fluorescence characteristics, and achieves excellent application potential on photothermal therapy and biological imaging. The preparation method solves the problems of weak biocompatibility and weak stability of the gold nanorods.

The invention discloses a high-specificity fluorescent probe for human carboxylesterase hCE2 and an application thereof. The substrate of the specific probe is an ester derivative of a 4-trifluoromethyl-7-umbelliferone compound and can be used for detection for the existence of hCE2 in different biological samples and quantitative determination for the vitality of hCE2. A specific flow for determining the enzymatic activity is as follows: selecting a hydrolysis reaction of the 4-trifluoromethyl-7-umbelliferone ester derivative as a probe reaction, selecting a proper substrate concentration, and determining the actual activity of the hCE2 enzyme in various biological samples, cells, carriers and overall organs by quantitatively detecting the generation amount of a hydrolysis metabolite 4-trifluoromethyl-7-umbelliferone in a unit time within a linear reaction interval. The high-specificity fluorescent probe disclosed by the invention can be used for quantitative evaluation for the activity of the hCE2 enzyme in biological samples from different sources; in addition, the probe reaction can also be used for rapidly screening an hCE2 inhibitor in vitro.

The invention provides a fluorescent material which contains a mesoporous material and a modified silicon nanocrystal. The modified silicon nanocrystal is prepared by performing silicon hydrogenation reaction on a silicon nanocrystal and silane compounds of which the general formula is R1Si(OR2)3, wherein R1 is an alkenyl group, and R2 is a substituted or unsubstituted alkyl group. The invention also provides a preparation method of the fluorescent material, which comprises the following step: in the presence of an organic solvent, mixing and contacting the modified silicon nanocrystal and the mesoporous material, wherein the modified silicon nanocrystal is prepared by performing silicon hydrogenation reaction on the silicon nanocrystal and silane compounds of which the general formula is R1Si(OR2)3, wherein R1 is an alkenyl group, and R2 is a substituted or unsubstituted alkyl group. The invention also provides application of the fluorescent material as a drug conduction carrier. The fluorescent material has fluorescent characteristic, and has the advantages of high capacity for resisting photofading and better drug slow-release property.

A method for synthesizing water-solubility fluorescence silver nanocluster by electrochemistry comprises the following steps: (1) preparing coordination agent, mass percentage concentration of the coordination agent in solution is 0.35% to 2%; (2) using acid solution to adjust potential of hydrogen (PH) of reaction system to be 6 to 8; and (3) using two pure silver bars as electrodes, interval between the electrodes are 8mm to 10mm, enabling direct current stabilized power supply to be conducted electrolytic reaction for 2min to 10min and obtaining fluorescence silver nanocluster water solution, wherein the reaction voltage is 4V to 8V. The method for synthesizing the water-solubility fluorescence silver nanocluster by the electrochemistry has the advantages of being simple in operation, easy to control, low in cost, fast in synthesizing, environment-friendly, and the like. The prepared water-solubility silver nanocluster has a fluorescence characteristic.

The present invention relates to a preparation method of a polysubstituted nitrogen-containing heteroaromatic compound. The polysubstituted nitrogen-containing heteroaromatic compound has a structurerepresented by general formula (I) or (II). The method concretely comprises the following specific steps: a transition metal catalyst, a 2,2'-bipyridine ligand and a solvent are added into a reactionvessel, and are uniformly mixed, a raw material A and a raw material B are added, the obtained mixture is sufficiently reacted at room temperature, a precursor of a raw material C or a raw material Dor a raw material D is added, and then the obtained mixture is sufficiently reacted at -10-150 DEG C to obtain the polysubstituted nitrogen-containing heteroaromatic compound. The method is characterized in that the nitrogen-containing heteroaromatic compound is prepared from alkenyl azide, isonitrile and an alkyne compound through a one-pot process under the action of the transition metal catalyst. The reaction involved in the method of the invention has very good tolerance and universality to functional groups, can be used for synthesizing various polysubstituted aminopyridines and aminoisoquinolines without strict anhydrous anaerobic conditions, and is very simple to operate.

The invention belongs to the field of functional materials, and more particularly relates to a redox-responsive color-changing rare earth supramolecular gel fluorescent material and a preparation method thereof. The redox-responsive color-changing rare earth supramolecular gel fluorescent material is prepared by mixing a mixed solution of an aqueous solution containing rare earth ion europium ionsand alkali liquor with an organic solution containing gel factor 3,5-dinitrosalicylic acid. Under alkaline conditions, the rare earth supramolecular gel fluorescent material is self-assembled by utilizing the coordination effect of the gel factor 3,5-dinitrosalicylic acid and rare earth ion europium ions and the PI-PI interaction of benzene rings of the 3,5-dinitrosalicylic acid. The gel formed has unique fluorescence characteristics of the rare earth ions, good luminous intensity and high fluorescence efficiency, and the excitation spectrum is located in a visible light region and has stronganti-interference capability. The rare earth supramolecular gel has redox responsiveness, simple and rapid preparation process, no need of heating treatment, and easily available gel factor, and therare earth supramolecular gel material has better application prospect in the high-end anti-counterfeiting field.

The invention provides a fluorescent material which contains an ordered mesoporous material and a modified silicon nanocrystal. The modified silicon nanocrystal is prepared by performing silicon hydrogenation reaction on a silicon nanocrystal and silane compounds of which the general formula is R1Si(OR2)3. The invention also provides a preparation method of the fluorescent material, which comprises the following step: in the presence of an organic solvent, mixing and contacting the modified silicon nanocrystal and the ordered mesoporous material, wherein the modified silicon nanocrystal is prepared by performing silicon hydrogenation reaction on the silicon nanocrystal and silane compounds of which the general formula is R1Si(OR2)3. The invention also provides application of the fluorescent material as a drug conduction carrier. The fluorescent material has fluorescent characteristic, and has the advantages of high capacity for resisting photofading and better drug slow-release property.

The invention provides a preparation method of fluorescent ammonia carboxylate. The preparation method comprises the following steps of dissolving carboxylic acid and organic amine into distilled water, putting into a flask with a cork under the nitrogen protection condition, oscillating to dissolve by ultrasonic waves, stirring and reacting for 12-36h at the temperature of 0 to 30 DEG C, and obtaining a water solution with main ingredient of ammonia carboxylat mixture; washing the water solution with the ammonia carboxylat mixture for three times by petroleum ether, and performing water-phase pressure relief and rotary evaporation, so as to obtain the fluorescent ammonia carboxylate. The ammonia carboxylate prepared by the preparation method has the advantages that the preparation method is simple, the yield is high, the fluorescent property is excellent, the transmitting wavelength also changes along with the change of exciting wavelength, and the reliance of exciting wavelength is realized; the ferric ions can be well identified, and a linear relationship is formed between the concentration of ferric ions and the degrading of fluorescent intensity.

The invention belongs to the technical field of fine chemical engineering, and relates to a preparation method and application of a binuclear Ir (III) metal-organic supramolecular cage compound. According to the preparation method, aliphatic diamine A is used as a connecting body; L1 and L2 are used as pre-assembled metal-based ligand Ir (III) complexes, then sodium borohydride is added to reduceSchiff base -C=N- double bonds in the obtained cage structure into -CH-NH-, finally, the compound with the metal-organic cage structure is prepared, and the synthetic route of the compound is: A+L1 toA-L1 or A+L2 to A-L2. The preparation process is simple, the design idea is novel, the yield of the target compound is high, the obtained functional material is stable in chemical property, and the pre-assembled body is easy to modify. The compound A-L1 or A-L2 is used in oxidation of 1-oxo-2,3-dihydro-1-indene-2-methyl formate to generate 2-hydroxy-1-oxo-2,3-dihydro-1-indene-2-methyl carboxyl ate, the yield is as high as 83%, and the compound A-L1 or A-L2 is easier to put into practical application.

The invention discloses a self-repairing polysiloxane elastomer. The polysiloxane elastomer is prepared by taking aminopropyl double-terminated polydimethylsiloxane (NH2-PDMS (Polydimethylsiloxane)-NH2), diisocyanate and citryl chloride converted from citric acid as raw materials, and carrying out a reaction. According to the invention, two different diisocyanate and aminopropyl double-terminated polydimethylsiloxane are subjected to a reaction at room temperature, and an isocyanate group and an amino group generate carbamate. Hydrogen bonds are formed among the carbamates to generate physical crosslinking. And then controlling reaction conditions to enable two acyl chloride groups of the prepared citryl chloride to react with amino to generate amido bonds. The generation of amido bonds and the action of hydrogen bonds enable the elastomer to have fluorescence characteristics under a specific wavelength. The method is suitable for the field of high-molecular intelligent materials.

The invention relates to a 4-sulfophthalic acid rare earth metal complex, a preparation method therefor and an application thereof. A general chemical formula of the 4-sulfophthalic acid rare earth metal complex is [Ln( H2O )2( SP )], wherein the Ln are plus trivalent lanthanide-series rare-earth ions Dy (III), Tb (III) and Er (III), and SP is a negative trivalent anion of the 4-sulfophthalic acid. The 4-sulfophthalic acid rare-earth metal complex is prepared by a solvent-thermal method which has a high yield, good reproducibility and high thermal stability. Under ultraviolet excitation, the solid-state complex can emit feature red light, green light or blue light, and has a high application value in the field of material science while being used as a photoluminescent material.