42results 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 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 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 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 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 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 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.