400 results about "Ultraviolet absorption" patented technology

The invention relates to the technical field of organic material detection, in particular to an imine molecular sensor with a five-detection function, two-component gel as well as a preparation method and application of the imine molecular sensor. The imine molecular sensor has three signal responses of fluorescence on-off, ultraviolet absorption and color change to Fe < 3 + >, Co < 2 + > and Ni < 2 + > in a solution state, and has ultraviolet absorption and fluorescence on-off dual-detection performance to acid and alkali changes; the imine molecular sensor and cholesteryl half ester can form two-component gel through a heating-low-temperature ultrasonic cooling method; after Fe < 3 + >, Co < 2 + >, Ni < 2 + >, NaOH and HCl are respectively added, the orange of the gel becomes milky white, reddish brown, transparent red, milky white and milky white under sunlight, and the fluorescence of the orange of the gel disappears under an ultraviolet lamp, so that the rapid and sensitive detection of Fe < 3 + >, Co < 2 + >, Ni < 2 + >, acid and alkali under two states of the imine molecular solution and the gel is realized. The imine molecular sensor provided by the invention has the advantages of mild synthesis conditions, simple preparation and the like, and creates favorable conditions for popularization and application of the imine molecular sensor.

The invention provides a colorimetric / fluorescent dual-mode sensor, a preparation method of the colorimetric / fluorescent dual-mode sensor and application of the colorimetric / fluorescent dual-mode sensor in histamine detection. The colorimetric / fluorescent dual-mode sensor comprises a horseradish peroxidase-loaded metal organic framework (HRP-AIE-MOF), hydrogen peroxide and a chromogenic substrate o-phenylenediamine (OPD), horse radish peroxidase (HRP) in the HRP-coated AIE-MOF can oxidize colorless OPD into yellow 2, 3-diaminophenazine (DAP), an ultraviolet absorption peak is generated at 425 nm, a strong fluorescence emission peak is generated at 555 nm, the HRP-coated AIE-MOF has a strong fluorescence emission peak at 450 nm, and the HRP-coated AIE-MOF and a fluorescence signal of the DAP can form a ratio fluorescence sensor. According to the invention, the excellent catalytic ability of natural enzyme and the luminescence characteristic of AIE-MOF are integrated in one system, and high-sensitivity histamine detection is realized.

The invention provides a colorimetric / fluorescent dual-mode nano-enzyme sensor, a preparation method thereof and application of the colorimetric / fluorescent dual-mode nano-enzyme sensor in formaldehyde detection. The sensor comprises a metal organic framework nano-enzyme AIE-MOF coated PCN-222 loaded with an AIE-MOF material, hydrogen peroxide and a chromogenic substrate o-phenylenediamine OPD; the metal organic framework nano enzyme PCN-222 in the AIE-MOF-coated PCN-222 can oxidize colorless OPD into yellow 2, 3-diaminophenazine DAP, an ultraviolet absorption peak is generated at the position of 450 nm, a strong fluorescence emission peak is generated at the position of 560 nm, the AIE-MOF-coated PCN-222 has a strong fluorescence emission peak at the position of 446 nm, and the AIE-MOF-coated PCN-222 and a fluorescence signal of the DAP can form a ratio fluorescence sensor. According to the invention, the excellent catalytic ability of the nano-enzyme and the luminescence characteristic of AIE-MOF are integrated in one system, so that high-sensitivity formaldehyde detection is realized.

The utility model discloses an anti-ultraviolet resin lens which comprises a first resin sheet and a second resin sheet. An ultraviolet absorption layer is arranged on the upper surface of the first resin sheet; an ultraviolet reflecting film is arranged on the lower surface of the second resin sheet, a laminated layer is arranged between the ultraviolet absorbing layer and the ultraviolet reflecting film, an organic silicon coating is arranged on the upper surface of the second resin sheet, a first anti-scraping layer is arranged on the upper surface of the organic silicon coating, a first oleophobic layer is arranged on the upper surface of the first anti-scraping layer, and a second oleophobic layer is arranged on the upper surface of the second anti-scraping layer. The first anti-scraping layer is arranged on the lower surface of the first resin sheet, the second anti-scraping layer is arranged on the lower surface of the first anti-scraping layer, the second oleophobic layer is arranged on the lower surface of the second anti-scraping layer, the ultraviolet absorption layer is a zinc oxide ultraviolet absorption layer, the ultraviolet reflection film comprises a first oxidation film and a second oxidation film, and the first oxidation film is arranged on the lower surface of the second resin sheet. The ultraviolet absorption layer and the ultraviolet reflection film are arranged between the two resin sheets, it can be guaranteed that the anti-ultraviolet coating structure cannot be abraded in the using process, and therefore the good using effect is achieved, and the service life is long.

The invention relates to the field of glass, in particular to lithium-free alkali aluminosilicate glass as well as a preparation method and application thereof. According to the glass, SiO2, Al2O3, Na2O, K2O, MgO and ZrO2 serve as main components, the content of Li2O is lower than 100 ppm, a nitrate-sulfate-carbon powder composite clarifying agent is adopted, the number of bubbles and the content of residual sulfur are effectively reduced, and use of a toxic or ultraviolet absorption type clarifying agent is avoided. ZrO2 is obtained by calcining a zirconium-based metal-organic framework material and is good in dispersity, and the devitrification resistance is improved. During float forming, through micro-positive pressure, high-purity protective atmosphere and four-zone gradient temperature control, the tin penetration depth is controlled within 15 microns, and the surface tin content is smaller than or equal to 4 micrograms / cm < 2 >. The obtained glass has high light transmittance, high hardness and excellent chemical strengthening performance, and is suitable for the high-end fields of electronic display cover plates, vehicle-mounted screens, touch panels, photovoltaic substrates and the like.

The invention discloses an infrared shielding polyurethane glass film and a preparation method thereof, and relates to the technical field of high polymer materials. When the infrared shielding polyurethane glass film is prepared, an organic nickel complex and 3-imidazole-1-propionic acid react to prepare a functional cross-linking agent; the preparation method comprises the following steps: reacting 4-aminophenylacetonitrile with 3-hydroxypropyl acrylate and quinoline-4-formaldehyde in sequence to prepare an ultraviolet absorption monomer; the preparation method comprises the following steps: carrying out reaction polymerization on polypropylene glycol, an ultraviolet absorption monomer, 1, 4-butanediol and 4-chloromethyl-1, 3-phenyl diisocyanate to prepare polyurethane; the tungsten-doped titanium dioxide and chloropropyltriethoxysilane are subjected to a reaction, and modified titanium dioxide is prepared; uniformly mixing polyurethane, modified titanium dioxide, a functional cross-linking agent and acetone, and coating and curing to obtain the infrared shielding polyurethane glass film. The infrared shielding polyurethane glass film prepared by the invention has excellent infrared shielding, anti-aging, antibacterial and mechanical properties.

The invention discloses an ultraviolet absorption gas analyzer, and relates to the technical field of gas analyzers. The ultraviolet absorption gas analyzer comprises an analyzer outer shell, the analyzer outer shell is connected with a first supporting seat and a second supporting seat, the first supporting seat is fixedly connected with a light source supporting seat, the light source supporting seat is provided with an ultraviolet light source generator, a rotating disc is rotatably connected between the first supporting seat and the light source supporting seat, and the rotating disc is provided with a rotating shaft. A plurality of groups of optical filter main bodies are arranged on the rotating disc, a measuring air chamber is arranged between the first supporting seat and the second supporting seat, and a light source receiver is arranged on the second supporting seat. According to the ultraviolet absorption gas analyzer, on one hand, protection is provided for the optical filter main body, the optical filter main body is isolated from the external environment, on the other hand, when the optical filter main body is replaced, the replacement of a plurality of groups of optical filter main bodies can be realized only by rotating the rotating disc, and the replacement process is convenient to operate, time-saving and labor-saving.

The invention relates to the technical field of anti-aging agents, and discloses a preparation method of an anti-aging agent and application of the anti-aging agent in plastics, the anti-aging agent contains styrene groups, and can be well fused and grafted with polyolefin such as polypropylene under the action of an initiator dibenzoyl peroxide or dicumyl peroxide, so that the anti-aging agent has a good anti-aging effect. The influence on the mechanical strength of the polyolefin plastic is very small, and the problem that physical blending can cause great influence on the mechanical strength and the use performance of the plastic can be avoided. Meanwhile, a phenol triazine structure contained in the anti-aging agent has a unique ultraviolet absorption effect, and a hindered amine structure is contained, so that the photo-oxygen degradation reaction of the polyolefin plastic can be inhibited through multiple ways of capturing free radicals and decomposing hydroperoxide, and through an accelerated aging experiment of xenon lamp irradiation, the plastic keeps very high tensile strength, and the anti-aging effect is good. And excellent thermo-oxidative aging resistance and ultraviolet radiation aging resistance are shown.

The invention relates to the technical field of material performance testing, in particular to a method and a system for testing the sunscreen performance of a composite sunscreen thermal insulation material. According to a surface temperature field distribution image, a heat distribution disorder index and a heat distribution disorder variable coefficient of the surface of the material are analyzed, and an interface dynamic effect intensity factor of the material is quantified; the influence of thermal resistance and thermal expansion difference on heat conduction stability is accurately evaluated; meanwhile, based on spectral data of all wave bands and surface average temperature data, correlation characteristics of the ultraviolet absorption amount, the heat loss amount and the surface temperature rise rate are analyzed, a photothermal conversion efficiency index is established, the thermal stress accumulation process is tracked in combination with the temperature gradient and the thermal stress history, and performance deviation caused by the cross-scale dynamic effect is revealed; the relation between the dynamic effect and the thermal stress is further analyzed, a real-time compensation value is generated, a traditional static test result is corrected, and therefore system errors caused by photothermal conversion nonlinearity, interface thermal stress accumulation and multi-layer structure anisotropy are overcome.

The present invention provides an oxime ester photoinitiator, a photocurable resin composition and an application. The above-mentioned oxime ester photoinitiator has a structure shown in the general formula (I): compared with the existing oxime ester photoinitiators, the oxime ester photoinitiator with the general formula (I) structure has better stability, so under the irradiation of ultraviolet light, it can effectively suppress the generation and volatilization of small molecule fragments, and almost no overflow gas is generated after curing; at the same time, because the above-mentioned oxime ester photoinitiator has a specific substituent group, it has a strong ultraviolet absorption performance, thereby improving its sensitivity, and the oxime ester photoinitiator also has a high yellowing resistance. In addition, the oxime ester initiator with the structure shown in the general formula (I) can be used in a UV-LED light curing system, and is particularly suitable for initiation under the action of a 365nm light source.

The invention relates to the technical field of coatings, in particular to a double-layer super-hydrophobic passive daytime radiation cooling coating and application thereof. The super-hydrophobic passive daytime radiation cooling coating is developed through a two-step spraying process. And the bottom layer is formed by combining a high refractive index TiO / Al2O3 composite material and modified polydimethylsiloxane. The top layer employs high band gap SiO to mitigate ultraviolet absorption and combines unmodified PDMS to ensure high thermal emissivity and low surface energy. By accurately controlling the particle size distribution and concentration gradient between the two layers of structures, the optimized SPDRC coating shows excellent optical performance, the solar reflectivity is 93.2%, and the mid-infrared thermal emissivity is 95.4%. Under the direct irradiation of the sun, the temperature reduction of 10 DEG C is obviously lower than that of the environment, and the radiation cooling power of 125 Wm <-2 > is realized. In addition, the coating has a water contact angle of 155 degrees, has strong super-hydrophobicity, can ensure excellent self-cleaning performance and long-term durability, and is suitable for actual outdoor application of building cooling.

The invention relates to the technical field of nano biosensing, in particular to a cerium-based metal organic framework loaded gold nano-cluster composite material as well as a preparation method and application thereof. A fluorescent and colorimetric dual-channel sensing platform is formed by compounding AuNCs and Ce-MOF and is used for detecting alpha-glucosidase and screening an alpha-glucosidase inhibitor, the cerium-based metal organic framework loaded gold nano-cluster composite material catalyzes and oxidizes a colorless substrate ABTS to generate colored oxABTS, and the oxABTS has characteristic ultraviolet absorption at 410 nm, so that the detection of alpha-glucosidase and screening of an alpha-glucosidase inhibitor can be realized. And the fluorescence of the cerium-based metal organic framework loaded gold nano-cluster composite material can be efficiently quenched through an inner filtering effect. Alpha-glucosidase catalyzes hydrolysis of a substrate AAG to generate AA, the AA can inhibit oxidation of ABTS regulated and controlled by a cerium-based metal organic framework loaded gold nano-cluster composite material, and then reduction of oxABTS ultraviolet absorption and fluorescence recovery of ACM are caused, so that dual-channel detection of alpha-GLU is realized through dual-signal output of colorimetric and fluorescence signals.

The invention provides a passive radiation refrigeration fabric as well as a preparation method and application thereof, and belongs to the technical field of automotive interior parts. According to the invention, the polymer of the pre-laid layer can provide good interface bonding force and has good sunlight refraction capability. The inorganic matter can provide good solar ray reflection performance, ultraviolet absorption capacity and thermal radiation performance and has good heat resistance and thermal stability, the resin can evenly disperse the inorganic matter, the structural stability of the cooling layer is guaranteed, and the reflection capacity and thermal radiation performance of the cooling layer can be further enhanced.

The invention relates to the technical field of water quality detection, in particular to a method for evaluating the toxicity level of halogenated disinfection byproducts based on protease. According to the invention, fluorescence spectrum, synchronous fluorescence spectrum and ultraviolet absorption spectrum technologies are adopted to research the interaction of seven cyclic and heterocyclic halogenated disinfection byproducts with pepsin and trypsin. A fluorescence quenching mechanism is analyzed through a Stern-Volmer equation, a double logarithmic equation and the like, and the influence of the halogenated disinfection by-product on the conformation of the protease is disclosed in combination with constants and thermodynamic parameters. The binding force of the halogenated disinfection by-product and protease is in positive correlation with cytotoxicity, a new index is provided for toxicity evaluation of the halogenated disinfection by-product, and optimization of a drinking water disinfection process and formulation of a water quality standard are facilitated.

The invention relates to the field of water quality detection, in particular to a water quality sampling detection method and device applied to a small and micro wetland unit. The method comprises the following steps: determining a turbidity coefficient according to scattered light intensity of a target water sample under different wavelengths, absorbance of a target interval in an ultraviolet absorption spectrum and fluorescence intensity of a target area in a fluorescence spectrum; determining a scattering equivalent absorption value of each wavelength according to the scattered light intensity of the target water sample under each wavelength, the absorbance corresponding to each wavelength in the ultraviolet absorption spectrum and the turbidity coefficient; determining a real ultraviolet absorption signal of each wavelength according to the absorbance corresponding to each wavelength in the ultraviolet absorption spectrum and the scattering equivalent absorption value of the wavelength; correcting the fluorescence spectrum according to the turbidity coefficient and the scattering equivalent absorption value of each wavelength to obtain a corrected fluorescence spectrum; and detecting the water quality according to the corrected fluorescence spectrum and the real ultraviolet absorption signal of each wavelength. According to the invention, accurate water quality sampling detection can be provided.

The invention provides a method for simultaneously detecting the purity of an antibody conjugate and the coupling ratio of a drug antibody based on a size exclusion chromatography method and application of the method. The method comprises the following steps: detecting and analyzing the purity of an ADC (Analog to Digital Converter) sample to be detected and the coupling ratio of the drug antibody by adopting an SEC-UPLC (Single Emission Computation-Ultra Performance Liquid Chromatography) serially connected with an ultraviolet detector; collecting a signal of the sample under the antibody characteristic ultraviolet absorption wavelength and the small molecule characteristic ultraviolet absorption wavelength at the same time; calculating the DAR value and the monomer purity of the ADC molecule according to the chromatographic absorption peak area; a mobile phase adopted by the SEC-UPLC is a sodium chloride-phosphate buffer solution containing 0-10vol% of an organic solvent; the ADC sample to be detected is an ADC molecule coupled with Dxd type small molecules. The invention provides an analysis method which is widely applicable to determination of the DAR value and the monomer purity of the ADC molecule coupled with the Dxd small molecules. The method can simultaneously solve the problems that the DAR value detection and analysis flux of the Dxd small molecules is low and the applicability is limited.

The invention relates to the technical field of coatings, in particular to a wind power blade protective coating and a preparation method thereof. The preparation method comprises the following steps: preparing polyhydroxyalkanoate grafted modified sepiolite; preparing a composite anti-ultraviolet filler; preparing a copolymer emulsion; and preparing the wind power blade protective coating. Lignin and dopamine monomers are compounded to form a lignin / polydopamine composite material, zinc ions are introduced and inserted into the lignin / polydopamine composite material, finally, the composite anti-ultraviolet filler is obtained, lignin is biomass waste, low in cost and reproducible, rich phenolic hydroxyl groups and amino groups can be introduced through polydopamine coating, and the composite anti-ultraviolet filler is prepared. According to the invention, lignin is added to enhance the chemical activity and adsorption capacity, polydopamine can chelate zinc ions, promote uniform nucleation of the zinc ions on the surface of the composite material and prevent agglomeration of free zinc ions, lignin and polydopamine have good ultraviolet absorption capacity and have synergistic interaction with broadband ultraviolet shielding of the zinc ions, and the full-wave band anti-ultraviolet performance is improved.

The invention discloses an LC-MS (liquid chromatography-mass spectrometry) detection method for N, N-diethyl-N ', N'-dimethylethylenediamine in chlorpheniramine maleate, and belongs to the technical field of analytical chemistry. The method comprises the following steps: firstly, preparing a test solution and a reference solution for later use; then setting liquid chromatography-mass spectrometry detection conditions, and detecting N, N-diethyl-N ', N'-dimethylethylenediamine in chlorpheniramine maleate by adopting a Shim-pack Scept Diol-HILIC-120 chromatographic column, taking a 0.1% difluoroacetic acid aqueous solution-acetonitrile mixed solution as a mobile phase and taking a 1% diethylamine acetonitrile solution as a solvent. According to the method, a liquid chromatography-mass spectrometry technology is adopted, the problem that N, N-diethyl-N ', N'-dimethyl ethylenediamine has no ultraviolet absorption can be effectively solved, and meanwhile, the method is high in specificity, high in sensitivity and high in efficiency.

The application discloses application of 2-amino isophthalic acid (2-AIA) as a MALDI matrix in characterization of oligosaccharide additives in food. The skeleton structure of 2-AIA has a strong ultraviolet absorption group and a protonation site, which is beneficial to laser energy transmission and desorption ionization process of the measured object. Meanwhile, 2-AIA has multiple polar functional groups, which can effectively enhance the directional combination of the hydroxyl group of 2-AIA and oligosaccharide, and improve the anti-interference ability of impurities in a complex system. In addition, 2-AIA and a traditional organic matrix alpha-cyano-4-hydroxycinnamic acid (CHCA) are combined as a binary matrix (CHCA / 2-AIA), which can play a synergistic role of the double matrix, significantly improve the detection sensitivity of oligosaccharide. On the other hand, the combination of CHCA and 2-AIA with different pH values can significantly improve the uniformity of the co-crystallization, and improve the accuracy and reproducibility of quantitative detection.

The application belongs to the field of pesticide residue detection, and particularly relates to a method for determining pesticides in water samples. The method comprises the following steps: amino modification is performed on MIL-100(Fe) to obtain an amino-functionalized MIL-100(Fe) material; and the pesticides in the water sample are analyzed and detected by using SALDI-TOF-MS with the amino-functionalized MIL-100(Fe) material as a substrate. The application forms a special MOF material by performing amino functionalization modification on MIL-100(Fe), which can enhance the interaction force between the substrate and the analyte, exhibits good ultraviolet absorption and energy transfer capacity, and thus improves the desorption / ionization efficiency in LDI detection. The method is used to detect pesticide residues, and in the low mass region, lower background noise and higher signal intensity are exhibited, so that the detection of pesticide substances in the small molecule region is greatly broken through, and the detection limit is greatly reduced.

The application discloses an anti-ultraviolet aging polycarbonate modified material and application thereof, and belongs to the technical field of polymer material modification. The material comprises synergistically modified polycarbonate, an organic small-molecule functional regulator, an antioxidant, a light stabilizer, a lubricating dispersant and an inorganic filler, wherein the synergistically modified polycarbonate is constructed into a multiple synergistic network by introducing a borate dynamic covalent structure, a Schiff base structure and a rare earth coordination structure, and the organic small-molecule functional regulator is p-hydroxybenzophenone. The preparation method comprises preparation of the synergistically modified polycarbonate and a subsequent melt blending and extrusion process. Through the technical scheme, the synergistic effect of ultraviolet absorption, energy transfer and free radical inhibition is realized, the yellowing degree of the material is significantly reduced, the mechanical property retention rate and the optical stability are improved, and the material is suitable for the fields of automobile transparent parts, outdoor optical materials and electronic and electrical shell.

The invention relates to the technical field of automobile glass surface treatment, in particular to heat management coated glass and a preparation method thereof, and the heat management coated glass is prepared by compounding two pieces of composite glass through an adhesive film; the composite glass sequentially comprises a glass substrate, an ultraviolet absorption functional layer and an infrared reflection functional layer, the preparation raw materials of the ultraviolet absorption functional layer at least comprise a SiO2 sol matrix and an inorganic ultraviolet absorbent; the preparation raw materials of the infrared reflection functional layer at least comprise tetraethoxysilane, acetylacetone, hydrochloric acid and antimony-doped tin oxide nanoparticles. The surface of the glass is coated with the optimized ultraviolet absorption functional layer and the infrared reflection functional layer, so that the barrier rate to ultraviolet (UV) of 99% or above and the reflectivity to infrared (IR) of 80-90% are achieved, and meanwhile, the glass has the characteristics of low cost and high weather resistance.

The present invention discloses a high-temperature and high-pressure temperature field measurement method based on low-resolution ultraviolet absorption tomography. The method comprises: selecting the electronic transition of NO or OH in the ultraviolet band as the absorption spectrum measurement object according to the temperature of the temperature field to be measured, and selecting the vibration spectrum band of the measurement object according to the concentration and size conditions of the temperature field to be measured to determine the wavelength range to be measured; selecting a broadband light source and a low-resolution spectrometer as the light source and detector required for the absorption spectrum measurement, respectively; establishing an optical path network for absorption tomography, wherein each optical path uses the selected broadband light source and low-resolution spectrometer, and the absorption spectrum of the measurement object is measured on all optical paths. The temperature of each spatial position is calculated from the absorption spectrum signals collected by each optical path, and the temperature field is reconstructed. The present invention can realize accurate temperature measurement by absorption spectrum under high-temperature and high-pressure conditions, and realize accurate measurement of high-temperature and high-pressure temperature fields by combining with a tomography reconstruction algorithm.

The invention belongs to the technical field of high polymer chemistry and material science, and particularly relates to application of a salicylaldehyde Schiff base chiral polymer in iron and copper ion detection, and the structural formula of the salicylaldehyde Schiff base chiral polymer is one of the following structures shown in the specification. . The salicylaldehyde Schiff base chiral polymer has high selectivity to copper ions and iron ions, and qualitative detection of the copper ions and the iron ions can be achieved according to changes of ultraviolet absorption spectrums, digital circular dichroism spectrums and fluorescence spectrums before and after coordination of the salicylaldehyde Schiff base chiral polymer with the copper ions and the iron ions.

The invention belongs to the technical field of metering, and particularly relates to a method for developing an L-phenylalanine solution standard substance based on a solid state national first-grade standard substance. On one hand, the fixed value is accurate and reliable, on the other hand, the uniformity and the stability of the L-phenylalanine solution standard substance are accurately and reliably analyzed, and on the other hand, the uncertainty of the L-phenylalanine solution standard substance is comprehensively evaluated; in addition, in the process of analyzing the uniformity and the stability of the L-phenylalanine solution standard substance, test parameters of an ultra-high performance liquid chromatography-ultraviolet absorption method are screened, and a method for analyzing the accuracy and the precision is established; therefore, the technical problem of lack of the L-phenylalanine solution standard substance in the prior art is solved.

The utility model discloses louver type dimming glass, which relates to the technical field of dimming glass and comprises a glass mounting frame, a dimming glass main body is mounted in the glass mounting frame, a fireproof layer and an elastic cushion are arranged on the inner wall of the glass mounting frame, and a sealing layer is connected between the elastic cushion and the dimming glass main body. The dimming glass body comprises a transparent conductive base material layer, the two sides of the transparent conductive base material layer are each provided with an adhesive clamping layer, the outer walls of the adhesive clamping layers on the two sides are provided with a first dimming film and a second dimming film respectively, and the outer sides of the first dimming film and the second dimming film are connected with an ultraviolet absorption adhesive film and an infrared absorption adhesive film through the adhesive clamping layers respectively. And an outer glass layer and an inner glass layer are respectively arranged on the outer sides of the ultraviolet absorption adhesive film and the infrared absorption adhesive film. According to the louver type dimming glass, various combined colors can be generated, the practicability of the louver type dimming glass is improved, the blocking effect of the louver type dimming glass on infrared light and ultraviolet light is improved, and meanwhile the situation that the dimming glass leaks light can be avoided.

The invention discloses an inorganic compound crystal as well as a preparation method and application thereof, and belongs to the field of crystal materials. The chemical formula of the inorganic compound crystal is Na2 [B4IO9] (IO3). The powder frequency doubling intensity of the inorganic compound crystal under 1064nm laser irradiation is 7.8 times that of KH2PO4 (KDP), phase matching can be realized, and the inorganic compound crystal has a relatively high laser damage threshold; the inorganic compound crystal has high transmittance in the spectral range of 243 nm to 2500 nm, and the ultraviolet absorption cutoff wavelength is about 243 nm; and the Na2 [B4IO9] (IO3) can be well permeated in the range of 0.24 to 7.33 microns. The inorganic compound crystal can be stabilized to 435 DEG C, and has excellent thermal stability.

The invention provides a diatom-bridged fluorescent dye and application thereof, the diatom-bridged fluorescent dye is a compound represented by a formula A, R1 to R9 and Y <-> are defined in the description, the maximum ultraviolet absorption wavelength is about 620 nm, and the maximum fluorescence emission wavelength is about 650 nm. The diatom bridged fluorescent dye disclosed by the invention has excellent viscosity responsiveness, high fluorescence intensity and good stability, and has an extremely high application value in biological imaging. # imgabs0 #

The invention discloses NaYF4: Yb, Er (at) NaYF4 (at) SiO2 (at) AgNPs as well as a preparation method and application thereof in vitamin B12 detection. According to the method, a core NaYF4: Yb, Er and a core shell NaYF4: Yb, Er (at) NaYF4 are prepared through a high-temperature solvothermal reaction; and carrying out hydrophilic modification and fluorescence enhancement modification to obtain the nano probe. Compared with the prior art, the invention has the following advantages: (1) the NaYF4: Yb, Er (at) NaYF4 (at) SiO2 (at) Ag NPs can absorb exciting light at 980nm and convert the exciting light into visible fluorescence, and through an energy transfer mode, an up-conversion fluorescence emission peak and an ultraviolet absorption peak of vitamin B12 coincide, so that rapid detection is realized; (2) the nanoparticles and the application method have the advantages of high sensitivity, convenience and rapidness in operation, good specificity and the like.

The present invention discloses a method for preparing sunscreen fibers with aluminum and cerium co-doped zinc oxide quantum dots. By utilizing the local surface plasmon resonance of metal oxides to enhance the emissivity of the polymer substrate, a relatively high radiation cooling power is obtained. At the same time, the co-doped zinc oxide quantum dots have a relatively high ultraviolet absorption rate. Through a special shear oscillation melt extrusion process, the uniform dispersion of zinc oxide in nylon fibers is achieved. When the prepared fibers are irradiated by sunlight, the measured value of UPF is greater than 50, and the transmittance of UVA is less than 5%, meeting the requirements of ultraviolet protection products. In addition, when irradiated by the sun, the maximum temperature difference between the inside and outside of the zinc oxide nylon fibers reaches 4°C, showing an obvious cooling effect. The present invention has wide applications in sunscreen clothing.