43results about How to "Long absorption wavelength" patented technology

The invention discloses a high-detective-efficiency single photon avalanche diode (SPAD) detector array unit. The array unit adopts a surrounded type SPAD structure with a deep P well protected by a P-injection layer, a P buried layer and a P-buried layer, i.e., the deep P well is formed in a P type substrate through ion injection, two buried layer regions, i.e., a P buried layer region 3 and a P-buried layer region 4, are arranged in the deep P well, and the upper part of the P-buried layer region 4 is surrounded by a P-injection region 8. The structure of the array unit can effectively improve the photon detection efficiency of an SPAD device, and the dark count rate is very low, so that the overall performance of an SPAD detector is improved very well.

The invention provides a preparation method used for a liquid crystal display panel, comprising the steps as follows: (a) an upper substrate and a lower substrate are provided; (b) liquid crystal material is poured between the upper substrate and the lower substrate; the liquid crystal material comprises at least a liquid crystal molecular and at least two photosensitive monomers, wherein, the absorbing wavelength of at least one photosensitive monomer is more than 300nm; and (d) voltages are applied between the upper substrate and the lower substrate; furthermore, according to the ultraviolet of the first wavelength, most of photosensitive monomers are polymerized as alignment polymers; (d) the ultraviolet of the second wavelength is radiated so as to lead the residual photosensitive monomers to be polymerized, wherein, the second wavelength is more than the first wavelength.

The invention relates to a process for synthesizing 3- or 4- carbonyl substituted coumarin connected by naphthenones and its use. The preparation process using general aldol condensation reaction comprises cyclanone and its corresponding aldehyde compounds with A1 group are added in reactor to produce semi-cyclanone with A1 group; 3- or 4- acetyl substituted coumarin with A2 group and selenious acid are added in another reactor to produce coumarin aldehyde with A2 group; said semi-cyclanone with A1 group dye reacts with coumarin aldehyde with A2 group in the presence of xylene and ethanol mixed solvent to form 3- or 4- carbonyl substituted coumarin connected by naphthenones. The product can be used for visible light polymerization of olefine monomer in photosensitized initiation system and used as photo curing materials, etc.

The invention disclosed a hexaarylbisimidazole like compound, a method for preparing the same, application thereof in the preparation of photooxidant or photoinitiator, as well as a composite containing the same. Compared with the prior hexaaryldiimidazole compound, the compound in the invention can absorb longer wavelength up to 410 nanometers, so the compound and the composite containing the same have higher photosensitivity.

The invention provides a targeted thymidine kinase photosensitizer, a pharmaceutical composition thereof, and applications of the targeted thymidine kinase photosensitizer in treating cancers. The targeted thymidine kinase photosensitizer is capable of increasing photosensitizer selectivity on tumor cells; tolerance is higher; and the blood concentration can be achieved in 24 hours. The targeted thymidine kinase photosensitizer possesses a larger conjugated system absorption wavelength, so that is beneficial for treatment of advanced tumors; no more energy of light output equipment is required by the wavelength zone, and it is even possible for using of LED, so that practicality and economical efficiency of PDT are improved. The targeted thymidine kinase photosensitizer can be used for diagnosis, and for treating prostatic cancer via fluorescence imaging guiding. According to the pharmaceutical composition, chemotherapeutic agents and the targeted thymidine kinase photosensitizer are combined, so that therapeutic effect of PDT is improved further, application range on tumor is enlarged, and excellent curative effects on metastatic tumors are achieved.

The invention provides a method for selecting a maximum absorption wavelength in detecting formaldehyde with an acetylacetone spectrophotometry. The method comprises the following steps of: A, preparing a certain concentration of standard formaldehyde solution; B, using the standard solution to respectively prepare several different concentrations of formaldehyde solutions to be detected; C, respectively taking appropriate amount of formaldehyde solutions to be detected to test tubes, and respectively adding appropriate amount of acetylacetone solutions; D, respectively using 10mm of absorption cells to detect the absorbance As of several different concentrations of formaldehyde solutions to be detected at several different wavelengths of a spectrophotometer; E, using appropriate amount of distilled water and isometric acetylacetone for blank control, and respectively using the10mm of absorption cells to detect the absorbance A0 at several different wavelengths of the spectrophotometer; and F, respectively calculating the absorbance A of several formaldehyde solutions to be detected under different wavelengths, and determining the maximum absorption wavelength. The method has simple steps and convenience for operation, the maximum absorption wavelength is effectively found out, and therefore the accuracy of formaldehyde content detected by the acetylacetone spectrophotometry is ensured.

The invention discloses a seawater desalination membrane. The seawater desalination membrane comprises one millipore filtration membrane, a carbon-containing composite layer and one millipore filtration membrane, the aperture of every millipore filtration membrane is 10 nm to 100 [mu]m, every millipore filtration membrane is made of polymer, metal or oxide, and the carbon-containing composite layer contains partially reduced graphene oxide, CdS and nanometer titanium oxide. Two sides of the composite layer are protected by the two millipore filtration membranes, so the carbon-containing composite layer have high mechanical performances, and is difficult to destroy. The carbon-containing composite layer allows water molecules to go through, and the pass rate of sodium ions, calcium ions and magnesium ions in seawater is extremely low. The seawater desalination membrane has a high desalination efficiency, and allows the salt removal rate to be 98% or above.

The invention relates to an aqueous free radical photo initiator and a corresponding preparation method, wherein the initiator is 2-hydroxy-(2'-thioxanthone oxyl)-propyl sulfonate. The preparation method comprises adding concentrated sulfuric acid into o-sulfhydrylbenzoic acid solution to be reacted, mixing, adding fenol to extract, mixing, increasing temperature to 75-80 DEG C when the reaction solution is orange-red turbid solution, reducing temperature T under 45 DEG C after complete reaction, washing and filtering the reaction solution, drying to obtain 2-hydroxy thioxanthone dry product, adding 2-hydroxy thioxanthone dry product and sodium-hydroxide into tetrahydrofuran solution, increasing temperature to refluxing state, mixing and reacting to obtain red suspending liquid, adding halogenated sulfonate into the red suspension liquid, adding phase transfer catalyst, refluxing, mixing and reacting completely, quenching the reaction liquid into solvent, drying and filtering to obtain final product. The preparation method can avoid environment pollution, improve water solubility and reduce product cost with simple preparation.

The invention relates to the technical field of preparation of building coatings, in particular to a preparation method of a photocatalytic shell powder coating. The method comprises the following steps: oxidizing sulfhydrylated halloysite powder by using hydrogen peroxide and methanol to obtain a photocatalytic nanotube carrier; dispersing ethyleneimine, tetraethylenepentamine and bisphenol A epoxy resin in absolute methanol, dissolving the components and sequentially adding silicone acrylic emulsion, sepiolite powder, diatomite, shell powder and the like to obtain the photocatalytic shell powder coating. Nano-crystalline cellulose is carbonized and then is supported on the photocatalytic nanotube carrier, so that the photocatalytic nanotube carrier has very high adsorption capacity; after the photocatalytic nanotube is mixed with nano titanium dioxide, photo-induced electrons generated by titanium dioxide can be easily received, and the efficiency of photocatalytic degradation of indoor organic toxic gases is improved. The shell powder and the photocatalytic nanotube carrier both provide a porous structure, so that the indoor photocatalytic oxidation efficiency is improved, and the adsorption rate of chromium ions in the photocatalytic nanotube carrier in low-concentration organic toxic gas can be improved. The product is healthy and environment-friendly and has a wide application prospect.

The invention relates to a chlorin compound of which an intermediary site is substituted by 4-carboxyl butyl, a preparation method of the chlorin compound, and application of the chlorin compound in the field of medicines. The preparation method comprises the following steps: (1) with pyrrole and 5-methoxycarbonyl-1-valeraldehyde as raw materials, synthesizing an important intermediate 5,10,15,20-4-(4-methoxycarbonylbutyl)-porphine; (2) in an organic solvent medium, hydrolyzing the 5,10,15, 20-4-(4-methoxycarbonylbutyl)-porphine under an alkaline condition to obtain 5,10,15,20-4-(4-carboxybutyl)-porphine; (3) reducing the 5,10,15,20-4-(4-carboxybutyl)-porphine, and performing column chromatographic separation to obtain a target compound. The target compound, as a photosensitizer, is mainly applied to treatment of tumors, port wine stains and other diseases.

The invention relates to a tetraalkoxy phenyl sulpho-diene nickel and a preparation method thereof, belonging to the synthesis technology of organic chemistry. A diketone route synthesis method is adopted to prepare tetraalkoxy phenyl substituted sulpho-diene nickel complex; the aim of increasing the maximum absorption wavelength of the sulpho-diene nickel complex can be achieved by utilizing the adjustability of the maximum absorption wavelength of the sulpho-diene nickel complex. Dialkoxy substituted benzene reacts with oxalyl chloride under the catalysis of anhydrous aluminium trichloride to generate corresponding ortho-diketone which then reacts with phosphorus pentasulfide to generate corresponding sulphur phosphide, and finally the obtained sulphur phosphide reacts with nickel chloride water solution to obtain the tetraalkoxy phenyl sulpho-diene nickel. The prepared tetramethoxyl phenyl sulpho-diene nickel C has the maximum absorption wavelength lambda max within the range of 940-980nm in methylbenzene, 1, 2-dichloroethane, N, N-dimethyl formamide (DMF) solution, can be used for preparing near-infrared absorption filter material, and has great practicability.

The invention discloses an iridium coordination aza-pyrrolidone optical diagnosis and treatment reagent as well as a preparation method and application thereof. The complex is composed of a cyclo-metal ligand, a metal center and an aza-pyrrolidone auxiliary ligand, the overall preparation process is simple, and the prepared complex has a long absorption wavelength, so that the complex has a deep tissue penetration depth in the field of living body application and is more suitable for biological imaging. The complex has strong absorption in an ultraviolet region and a near-infrared region, andcan be excited by near-infrared light, so that the damage of an excitation light source to a biological sample can be weakened; and the complex can be used in the field of photodynamic photo-thermal combined therapy guided by biological imaging, and has important application prospects.

The invention belongs to the technical field of decorative material preparation, and particularly relates to a preparation method of a sound-absorbing wall cloth. The method comprises the steps that methyl methacrylate and butyl acrylate are adopted as raw materials and subjected to initiating polymerization to obtain a self-crosslinking acrylate emulsion, dioctyl phthalate and halloysite nanotubes are mixed to obtain a reaction product, then the self-crosslinking acrylate emulsion is spray-coated onto the surface of a honeycomb fabric loaded with titanium dioxide, coating of a filling liquidis conducted after standing and solidification, and the sound-absorbing environment-friendly wall cloth is obtained through drying and calendering. According to the method, the cotton thread pore density of the honeycomb fabric made of cotton threads is large, and pores are sealed after spray coating of the self-crosslinking acrylate emulsion to form closed pores, so that the honeycomb fabric preliminarily has a certain sound insulation capacity; in addition, the titanium dioxide shows higher catalytic activity under visible light, the catalytic degradation concentration of organic pollutantscan be reduced, the method has great superiority compared with a mode of directly doping activated carbon and other adsorbing materials in a wall cloth, and the application prospect is broad.

The invention relates to the use of photosensitizer in biological and pharmacy, wherein tricarbocyanine photosensitizers are utilized into the cell models for treating solid cancer through photodynamics, and in developing medicament for treating tumor.

The invention belongs to the technical field of preparation of optoelectronic materials and particularly relates to a copper-doped red-light perovskite quantum dot and a preparation method thereof. According to the method, a cesium salt or a formamidine salt, copper acetate, lead bromide and lead iodide are adopted as raw materials, organic acids and organic amine are adopted as ligands, and the stable and efficient copper-doped red-light perovskite quantum dot processable in solutions are rapidly synthesized through a thermal injection method. The stability of the red-light perovskite quantumdot is greatly improved through copper doping, and meanwhile, it is ensured that the high-fluorescence quantum efficiency of the quantum dot approaches 90%. According to the quantum dot, the absorption wavelength is increased along with the increase of the doping amount of copper, and a blue shift phenomenon of corresponding fluorescence emission wavelength of the quantum dot occurs. Obtained red-light perovskite quantum dot powder has high stability and can still be stored for more than 15 days under the condition that the air humidity is higher than 85%. The preparation method is simple andenvironmentally friendly, and the obtained red-light perovskite quantum dot can be applied to photoelectric devices such as light-emitting diodes, photoelectric detectors, laser devices and solar cells.

The invention discloses an extraction process of prinsepia utilis royle pigment, and belongs to the technical field of extraction of natural pigment. The prinsepia utilis royle pigment is subjected topreliminarily qualitative treatment to determine an optimal extraction solvent and a maximum absorption wavelength, a secondary universal rotary combination design is adopted to optimize the extraction process of the prinsepia utilis royle pigment on the basis of a single-factor experiment, and the in vitro anti-oxidation activity of the prinsepia utilis royle pigment is researched; optimal processes for extraction of the prinsepia utilis royle pigment, obtained by research, are as follows: an extraction solution is 1% hydrochloric acid / ethanol in a volume ratio of 1.86:98.14, the extractiontime is 30 min, the extraction temperature is 80 DEG C, and the liquid-to-material ratio is 25:1; and the determination of the in vitro anti-oxidation activity of the prinsepia utilis royle pigment shows that the prinsepia utilis royle pigment has higher anti-oxidation activity, thereby providing a new idea for development and utilization of prinsepia utilis royle.

The invention discloses a benzo-pyronine near-infrared fluorescent dye. The benzo-pyronine near-infrared fluorescent dye has the following structural formula I. The invention also discloses a preparation method of the dye. The dye has good biocompatibility and light stability, near-infrared fluorescence emission and high fluorescence quantum yield, and is used for covalent or non-covalent fluorescence labeling of fluorophore and biomacromolecules of fluorescent probes.

The present invention discloses new application of a benzazole chloride, namely, 2-[2-[4-[(2-cyanoethyl)-methyl-amino]-phenyl]-vinyl]-1,3,3-trimethyl-3H-benzazole chloride into spectrophotometry-basedplatinum measurement. When the compound, used as an organic complexing agent, is applied to spectrophotometry-based platinum measurement, the process mainly includes the following steps of: solutionpreparation; standard curve drawing; and sample measurement. The sample determination step further includes the steps of sample dissolution, complexation, liquid-liquid extraction, and absorbance measurement. The measuring method provided by the invention can avoid a near-ultraviolet saturated absorption zone and a platinum ion absorption band, has the advantages of rapid color development, stablecomplexation products, high anti-interference performance, good selectivity to platinum, high safety, innocuity, and environmental friendliness, and can be used for separation, enrichment and detection of environmental water samples, model water samples and glass trace platinum.

The invention relates to a chlorin derivative, a preparation method of the chlorin derivative, a photoacoustic sensitive agent containing the chlorin derivative, an antitumor drug containing the chlorin derivative, and application of the chlorin derivative in preparation of the antitumor drug. The chlorin derivative of the present invention can be used for photodynamic therapy and sonodynamic therapy so as to effectively suppress and treat cancer.

The invention relates to the technical field of photo initiators, and provides an application of anthracene ring pillar aromatic hydrocarbon as a photo-polymerization initiator and a preparation method thereof. Anthracene ring pillar aromatic hydrocarbon has a large ring structure formed by methylene bridged anthracene units. The initiator is a novel photo initiator. Under light irradiation, anthracene ring pillar aromatic hydrocarbon large ring molecules are broken to form double-free-radical straight-chain oligomers, and the photo-polymerization reaction of monomers can be efficiently initiated. Compared with developed pillar aromatic hydrocarbons and anthracene ring pillar aromatic hydrocarbon initiators, the absorption wavelength of the anthracene ring pillar aromatic hydrocarbons is long, strong light absorption is achieved between 200 nm and 450 nm, and photo-induced polymerization of near ultraviolet visible light can be achieved. Compared with a traditional commercial photo initiator, the photo initiator provided by the invention is safe and non-toxic, small molecular fragments are not generated after light irradiation, and the migration of the photo initiator can be greatly reduced, so that the problems of toxicity, odor and the like of a photo-polymerization curing product are avoided.

The invention discloses an environment-friendly damp-proof UV gloss oil and a preparing method thereof. The environment-friendly damp-proof UV gloss oil comprises a polyurethane-acrylate prepolymer, anano-bimetallic oxide adsorption material, a photoinitiator, a stabilizer, a flatting agent and a defoaming agent. The preparing method of the environment-friendly damp-proof UV gloss oil includes the steps of weighing all the raw materials, and putting all the raw materials into a high-speed disperser to be dispersed to obtain the environment-friendly damp-proof UV gloss oil. The polyurethane-acrylate prepolymer does not contain volatile organic matter or reactive diluents and is harmless to a human body and environmentally friendly; the nano-bimetallic oxide adsorption material has strong adsorption performance and can adsorb damp water and prevent water mist; the compound photoinitiator has the advantages of being short in curing time and large in absorption wavelength and has the optimal photo-curing speed; the environment-friendly damp-proof UV gloss oil is high in adhesive force, high in curing speed and almost free of water mist.

The invention provides a series of benzotriazole compounds with a diphenol substituted structure, and the general formula of the chemical structure of the benzotriazole compound is [3-(2H-benzo[d][1,2,3]triazole-2-yl)-4',5-disubstituted-[1,1'-biphenyl]-2-phenol], wherein R1 is selected from alkyl, alkoxy, aryl, amino or halogen groups; when R3 is hydrogen, R2 is selected from alkyl, alkoxy, aryl,amino or halogen groups; and when R3 is a methoxy group, R2 is benzene or 4-substituted phenyl. The light absorption main peak of the compound is near 350 nm, and the red shift of the compound is about 10 nm compared with that of a common benzotriazole ultraviolet absorbent, so that the absorption wavelength of the compound is obviously increased, and the maximum coverage range of the absorption wavelength can exceed 420 nm. The compound has the characteristic of absorbing short-wavelength blue light, and can be used as a blue light absorbent.

The invention relates to a dihydroporphyrin derivative and a preparation method and an application. The dihydroporphyrin is porphyrin hydrogenated at sites 2 and 3. The meso-N substituted dihydroporphyrin compound derivatization prepartaio method is simple and feasible, and the catalyst is cheap and easily available, so that the preparation method is an environment-friendly preparation method. According to the dihydroporphyrin derivative, by introducing nitrogen atoms into the molecular structure, the conjugated system of the target compound is further enhanced, and the target compound has a relatively long absorption wavelength and a relatively high fluorescence quantum yield. Through a phototoxic experiment, the applicant verifies that the dihydroporphyrin derivative has photosensitive activity and lays a solid foundation of being developed to a novel photosensitizer.

The invention relates to the technical field of light diagnosis and treatment, in particular to a perylene diimide derivative and a preparation method and application thereof. The structure of the perylene diimide derivative is shown as a formula I. The novel perylene diimide derivative PDI-R-4b successfully prolongs the absorption wavelength of perylene diimide to 697 nm, and an aggregate of the perylene diimide derivative PDI-R-4b has strong absorption and excellent photo-thermal performance in a first near-infrared biological window (650-950 nm), has high photo-thermal conversion efficiency as high as 59.4%, shows extremely strong anti-tumor capability in an in-vitro tumor experiment; the anti-tumor activity of the PDI-R-4b@SNC on breast tumor cells and the biotoxicity of the PDI-R-4b@SNC are low, and the PDI-R-4b@SNC is basically harmless to the cells under a dark condition; compared with an existing photo-thermal preparation, under the same anti-tumor effect, the dosage of the PDI-R-4b@SNC is greatly reduced; and the PDI-R-4b@SNC with low dosage and low toxicity provides a novel photo-thermal preparation for developing an effective cancer treatment method with high curative effect and low side effect.

The invention discloses a composite membrane. The composite membrane is composed of a microporous filtering film, a carbon-containing composite layer and a microporous filtering film in sequence. The bore diameter of the microporous filtering films is 10 nm to 100 microns, the microporous filtering films are made of macromolecules or metal or oxide, and the carbon-containing composite layer contains partially-reduced oxidized graphene or ZnS or nano-titanium oxide. According to the composite membrane, as the two microporous filtering films are arranged on the two sides for protection, mechanical performance is high, and it can be guaranteed that the carbon-containing composite layer cannot be easily damaged. The carbon-containing composite layer can allow water molecules to pass through, but the passing rates of sodium ions, calcium ions, magnesium ions and the like in seawater are quite low. The salt removing efficiency is high, and the removing rate is 96% or above.