42results about How to "Long absorption wavelength" patented technology

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 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 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 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 a novel cationic photoinitiator represented by a general formula (I) in the description. According to the invention, the photoinitiator can match a longer absorption wavelengthin an application process, and has excellent photosensitive properties and the characteristics of being not easy to migrate and having yellowing resistance.

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 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 a class of red light aggregation-induced luminescent materials, in particular to a thieno[3,4-b]thiophene-based aggregation-induced luminescent material and a preparation method and application thereof. The light-emitting material uses triphenylamine and thieno[3,4-b]thiophene as core units, and uses 4-(4-(bis(4-methoxyphenyl)amino)phenyl)-6-methylthio Thieno[3,4-b]thiophene-2-carboxylic acid ethyl ester and 1,4-dimethylpyridinium iodide salt synthesis (E)-4-(2-(4-(4-(bis(4- methoxyphenyl)amino)phenyl)-2-(ethoxycarbonyl)thieno[3,4-b]thiophen-6-yl)vinyl)-1-methylpyridinium iodide salt, then dissolved in Acetone is added, and an aqueous solution of potassium hexafluorophosphate is added, and the material is prepared after the reaction. The fluorescence emission of the material is located in the near-infrared region, and the fluorescence brightness is strong, and can be used as a red light material in the imaging field.

The present invention discloses indole chloride, namely 2-[2-[4-[(2-cyanoethyl)-methyl-amino]-phenyl]-vinyl]-1,3,3-trimethyl A new application of ‑3H‑indole chloride in the spectrophotometric determination of platinum. When the compound is used as an organic complexing agent to measure platinum by spectrophotometry, it mainly includes the following steps: preparation of solution, drawing of a standard curve, and determination of samples. The sample determination includes: sample digestion, complexation reaction, liquid-liquid extraction, absorbance measurement. The determination method provided by the invention can avoid the near-ultraviolet saturation absorption zone and the platinum ion absorption band, has rapid color development, stable complexation products, strong anti-interference, good selectivity to platinum, safety and harmlessness, and environmental friendliness. It can be used for the separation, enrichment and detection of trace platinum in environmental water samples, model water samples, and glass.

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.

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 discloses a fluorine-boron dye molecule with a donor and an acceptor and quaternary ammonium salt and a preparation method thereof, and a preparation method of the fluorine-boron dye molecule with the donor and the acceptor. The preparation method comprises the following steps: taking 4-bromobenzaldehyde, pyridine-4-boric acid and potassium carbonate as main reactants to obtain a pyridine-4-formaldehyde compound; taking a pyridine-4-formaldehyde compound, 2-methylpyrrole, an oxidant and boron trifluoride diethyl ether as main reactants to obtain a boron dipyrromethene compound containing a pyridine structure; taking a boron dipyrromethene compound containing a pyridine structure, 4-diphenylaminobenzaldehyde and acid as main reactants to obtain boron dipyrromethene dye molecules with donors and receptors. The invention also includes quaternary ammonium salts of boron fluoride dye molecules having donors and receptors and preparation method thereof. Compared with the conventional BODIPY dyes, the BODIPY containing pyridine and triphenylamine and the quaternary ammonium salt compound thereof have the advantages of long absorption wavelength, favorable photothermal properties and favorable chemical stability, and are suitable for photothermodynamic therapy.