455 results about "Photo stability" patented technology

The invention discloses a preparation method of Au (at) Au (at) Ag / Pt / M NPs and application of the Au (at) Au (at) Ag / Pt / M NPs in klebsiella pneumoniae detection, and belongs to the technical field of analysis and detection. The invention particularly relates to development of a signal probe and combination and assembly of the signal probe and lateral flow immunochromatography (LFIA) for klebsiella pneumoniae detection. Au (at) Au (at) Ag / Pt / MNPs is a multi-element noble metal nanoparticle with plasma resonance property, peroxidase-like activity and light stability, shows strong detection potential in three modes of colorimetric (CM), catalytic colorimetric (CL) and surface enhanced Raman scattering (SERS), and is loaded into LFIA to construct a multi-mode LFIA (CM / CL / SERS-LFIA). The kit is expected to be used for direct multimode detection of klebsiella pneumoniae in clinical sputum samples, and a new early detection strategy is provided for respiratory tract infection diseases such as klebsiella pneumoniae.

The invention provides a method for improving the illumination stability of perovskite through post-treatment. The method comprises the following steps: S1, preparing a perovskite illuminant; s2, grinding and diffusing; and S3, inducing exposure and passivation of photoinduced defects. According to the invention, the light stability of the perovskite illuminant synthesized in a temperature solid state can be improved, so that the perovskite illuminant is applicable to wider application fields.

The invention discloses a multifunctional printing and dyeing dye and application thereof in outdoor clothes, and belongs to the technical field of nylon printing and dyeing, the multifunctional printing and dyeing dye comprises 1-3% (o.w.f) of an acid dye, 1.5-3.5 g / L of a dyeing auxiliary agent, and 0.6-1 g / L of an auxiliary agent cross-linking agent; the dyeing auxiliary agent is a core-crosslinked star-shaped polymer prepared by an arm-first method; dyeing can be changed into color fixation by adjusting the pH value and the bath ratio of the dye bath without additionally preparing a color fixation solution, so that the additional water consumption required by color fixation is reduced; the adopted dyeing auxiliary is a core cross-linked star-shaped polymer prepared by an arm method, and the ultraviolet light absorber is coated in a core, so that the light stability and washability of the ultraviolet light absorber are improved, the mobility is reduced, and the problem of sensitive skin stimulation caused by long-term contact with human skin after the ultraviolet light absorber is migrated to the surface of the fabric is prevented.

The invention discloses a red xanthene dye for blue photoresist color paste and a synthesis method of the red xanthene dye, and the synthesis method comprises the following steps: (1) sulfonyl chlorination reaction: carrying out sulfonyl chlorination reaction on xanthene molecules B containing two sulfonate radicals by using a chlorination reagent, and carrying out post-treatment to obtain a sulfonyl chloride intermediate C; and (2) esterification reaction: carrying out esterification reaction on the sulfonyl chloride intermediate C obtained in the first step by utilizing an esterification reagent, and carrying out post-treatment to obtain the target red xanthene dye A with methacrylamide at the tail end. The invention provides a novel xanthene dye molecule which can be mixed with a blue pigment color paste to prepare a blue photoresist color paste for improving the brightness of the color paste. In addition, the liquid crystal composition has the advantages of high transparency, high contrast ratio, good dispersity, relatively high covering power, tinting strength and the like, and is good in thermal stability and light stability; meanwhile, the synthesis method provided by the invention is simple, low in cost and easy for large-scale production.

The invention relates to the technical field of photo-thermal therapy, in particular to a monomolecular photo-thermal agent with high photo-thermal conversion efficiency and a preparation method and application of the monomolecular photo-thermal agent. The preparation method comprises the following steps: S1, synthesis of a compound X1: under the protection of argon, dissolving 2, 4-dimethyl pyrrole in dichloromethane, stirring in an ice bath, adding trifluoroacetic anhydride, heating to room temperature after stirring, extracting after quenching reaction, combining organic phases, drying, filtering, concentrating under reduced pressure and purifying by silica gel column chromatography to obtain the compound X1. The prepared monomolecular photothermal agent with the high photothermal conversion efficiency is high in water solubility, has the high photothermal conversion efficiency in an aqueous solution and is high in light stability, the immune escape phenomenon possibly caused by introduction of a high polymer material is avoided, and the technical problem that an existing photothermal agent is difficult to achieve the high photothermal conversion efficiency in the aqueous solution is solved.

The utility model relates to the technical field of television or display backlight equipment, and provides an active matrix driven Mini-LED backlight plate capable of achieving RGB independent control, the active matrix driven Mini-LED backlight plate comprises a substrate and a plurality of Mini-LED units arranged on the substrate in an array mode, and each Mini-LED unit comprises an RGB light-emitting unit, an RGB light-emitting unit, an LED light-emitting unit, an LED light-emitting unit and an LED light-emitting unit. Comprising a first blue light chip, a second blue light chip and a third blue light chip which are arranged on the substrate at intervals, and a green light conversion layer is arranged in the light emitting direction of the second blue light chip; a red light conversion layer is arranged in the light emitting direction of the third blue light chip; and the active driving unit is arranged on the substrate, is electrically connected to the RGB light-emitting unit, and is used for independently adjusting the brightness of the first blue light chip, the second blue light chip and the third blue light chip. The three chips of the RGB light-emitting unit are all connected with the driving unit through blue light chips, the brightness changes of the three chips along with changes of temperature, current and voltage are kept consistent, the situation of color shift can be greatly reduced, and the light-emitting stability is higher.

The invention discloses a near-infrared dichroic dye, a liquid crystal composition and application of the near-infrared dichroic dye and the liquid crystal composition. The structural general formula of the disclosed dichroic dye is as shown in formula I in the specification. According to the invention, a hydrogenated quinoline ring, a hydrogenated benzopyran ring and a hydrogenated naphthalene ring are introduced into a molecular skeleton, so that the novel near-infrared dichroic dye with high light stability, high solubility, high order parameter and high light modulation capability is obtained. Compared with the near-infrared dichroic dye disclosed in the prior art, the absorption band is further subjected to red shift, and the light modulation capability is remarkably improved; ordering parameters are greatly improved, and the application bottleneck is solved.

The invention belongs to the technical field of near-infrared organic dye synthesis, and particularly discloses a cyanine dye with J aggregation characteristic, J aggregation nanoparticles, and preparation methods and applications of the cyanine dye and the J aggregation nanoparticles. The cyanine dye is 1-ethyl-2-(2-(2-(-3-(2-(1-ethyl-3, 3-dimethyl-1, 3-dihydro-2H-benzo [g] indole-2-subunit) ethylidene)-2-(2, 2, 2-trifluoro-N-(2-methylbenzyl) acetamide) cyclopent-1-ene-1-yl) vinyl)-3, 3-dimethyl-3H-benzo [g] indoleiodised salt, and the structural formula of the cyanine dye is shown in the description. The preparation method is simple, the J aggregation nanoparticles can be prepared by utilizing the unique property of J aggregation, the J aggregation nanoparticles have high light stability and have strong fluorescence emission in a near-infrared second region, and the material prepared by the invention can be used as a contrast agent and is applied to the field of near-infrared second region fluorescence imaging.

The invention relates to the technical field of medical instruments, and discloses a cervical cancer precancerous lesion treatment head which comprises a treatment head body, a high-pressure balloon is arranged in the middle of the outer wall of the treatment head body, a light emitting body is arranged in the treatment head body and located in the high-pressure balloon, the high-pressure balloon is made of high-elasticity polyurethane, and the high-pressure balloon is made of high-elasticity polyurethane. Polyurethane can bear internal pressure and cannot be broken, a space is provided for treatment operation, the treatment head body is made of a high-light-transmittance light-transmitting material, the light-transmitting material has light stability, and the light-transmitting material can reduce loss of light in the transmission process. The light transmission loss is reduced through the high-light-transmittance light-transmitting material of the treatment head body, the light intensity and quality are guaranteed, the scattering points on the treatment head body are matched, the light is deeply and evenly radiated to the wrinkled part of the cervical dome at the deep position of the cervical canal and the dense scattering points, and the problem that the treatment effect is not ideal due to incomplete irradiation is solved.

The invention provides a bolete concentrated powder composition lipid carrier with an anti-aging effect as well as a preparation method and application of the bolete concentrated powder composition lipid carrier. The lipid carrier is prepared from the following substances in percentage by mass: 10 to 40 percent of bolete extract, 0.2 to 0.8 percent of antioxidant, 45 to 66 percent of solid lipid, 10 to 16 percent of liquid lipid and 4.2 to 7.8 percent of surfactant. According to the bolete concentrated powder composition lipid carrier provided by the invention, liquid lipid with anti-oxidation and light protection effects is mixed into solid lipid to construct a nano carrier matrix with a light protection function. Plant active ingredients with a light protection effect and an anti-oxidation effect and ergothioneine in the bolete extract are jointly loaded in a nano-structure lipid carrier, so that synergistic interaction of multiple effects is realized. The synergistic delivery system of the nanostructured lipid carrier can inhibit the photodegradation reaction of the ergothioneine and the generation of peculiar smell, improve the photostability of the ergothioneine, enhance the oxidation resistance of the ergothioneine in an acid environment, and improve the anti-aging effect.

The invention discloses an ultra-sensitive viscosity fluorescent probe based on a carbon-nitrogen double bond. The chemical structural formula of the probe is as follows: # imgabs0 #. The fluorescent probe is synthesized through Schiff base reaction, and is simple to operate and easy to synthesize. The probe can freely rotate at carbon-carbon double bonds and carbon-nitrogen double bonds, and when the probe is in high viscosity, free rotation of molecules is limited, so that twisted intramolecular charge transfer is inhibited, fluorescence of the probe is remarkably enhanced, and 650 nm near-infrared fluorescence is emitted under the excitation wavelength of 600 nm. In addition, the probe has ultrahigh sensitivity, excellent selectivity, excellent light stability and pH tolerance, and has huge application prospects in the technical fields of analytical chemistry, life science, biomedical treatment and the like.

The invention discloses the technical field of photocatalysis, and particularly discloses a preparation method of a visible-light response type covalent organic frame-TiO2 composite material, which comprises the following steps: adding TiO2 into a mixed solvent, carrying out ultrasonic dispersion, dropwise adding an H2PtCl6 aqueous solution while stirring, reacting under the irradiation of a mercury lamp, centrifuging, washing and drying to obtain a Pt-TiO2 material; the preparation method comprises the following steps: dispersing a Pt-TiO2 material in an organic solvent, adding 2-hydroxybenzene-1, 3, 5-tricarboxaldehyde and 4, 4 '-(benzo [c] [1, 2, 5] thiadiazole-4, 7-diyl) diphenylamine, carrying out ultrasonic treatment for 3-8 minutes, and then adding acetic acid; after 2-4 times of liquid nitrogen freezing-degassing, sealing, and reacting for 2-5 days at the temperature of 110-130 DEG C; and centrifuging, washing and drying to obtain the covalent organic frame-TiO2 composite material. The novel covalent organic frame-TiO2 composite material prepared by the invention effectively expands the visible light absorption range of TiO2, has strong visible light absorption and strong photocatalytic performance, can efficiently catalyze hydrogen evolution, and has excellent light stability and repeatability in photocatalytic hydrogen evolution reaction.

The invention discloses a liquid crystal compound containing 2, 4, 5-trifluorobenzene, a preparation method and a composition thereof. The structure of the compound disclosed by the invention is shown as a general formula I; and the liquid crystal composition disclosed by the invention comprises the liquid crystal compound disclosed as the general formula I. The liquid crystal compound has the advantages of low dielectric loss, good light stability, wide nematic liquid crystal phase, high birefringence, low viscosity, good low-temperature intermiscibility and the like. The composition based on the liquid crystal compound provided by the invention obtains relatively high dielectric tuning rate, extremely low dielectric loss and low rotary viscosity under high frequency; and the material has the advantages of good light stability, large birefringence, wide working temperature range and the like. The liquid crystal composition provided by the invention has the characteristics of large birefringence, low viscosity and the like, so that the liquid crystal composition is suitable for manufacturing liquid crystal optical elements and high-frequency assemblies. # imgabs0 #

The invention belongs to the technical field of industrial silane preparation, and provides a natural silane rotor and a preparation method and application thereof.The preparation method comprises the steps that a pyridoxal phosphate solution and a 4-amino ethyl cinnamate solution are mixed and then react to obtain pyridoxal phosphate cinnamyl ester; and mixing the pyridoxal phosphate cinnamyl ester solution and the amino silane solution, and reacting to obtain the natural silane rotor. The silane rotor has a good conjugated structure, is stable in chemical structure, can be stored for a long time, is good in light stability, and is not liable to cause a photobleaching phenomenon. Besides, conjugated single and double bonds capable of freely rotating exist in the molecular structure, a typical flexible intramolecular rotation characteristic is presented, the conjugated structure can freely rotate in a dilute solution, a surface sightseeing signal is weak, the free rotation phenomenon is limited in a thick solution, the surface sightseeing signal is strong, and the surface sightseeing signal is strong. Therefore, the device can be used as a molecular tool for monitoring the change of the thin consistency of the silane, and can provide real-time, lossless and visual detection support for the development of a silane modulation process.

The invention relates to the technical field of immunochromatography, in particular to time-resolved fluorescent microspheres, a preparation method and application of the time-resolved fluorescent microspheres in PSP / CRP / MxA quantitative detection immunochromatography test strip, and the preparation method of the time-resolved fluorescent microspheres comprises the following steps: 1) preparing surface aminated polystyrene microspheres; (2) carrying out glutaraldehyde crosslinking and 1, 10-phenanthroline-5-amino combination; 3) grafting a rare earth fluorescent dye on the surface; and 4) coating a polymer shell layer and modifying carboxyl. According to the invention, through a dual fixation strategy of surface grafting and polymer coating, the time-resolved fluorescent dye is confined to a functional region between the surface of the microsphere and a polymer shell layer, diffusion and leakage of dye molecules to the external environment are blocked, and the problem of dye shedding of traditional fluorescent microspheres is solved; the polymer shell layer can effectively isolate external ultraviolet light, oxygen and other corrosive factors, reduce photooxidative degradation and non-radiative transition loss of fluorescent molecules, and improve the light stability and fluorescent lifetime of the fluorescent molecules.

According to the yellow leuco dye developing ink and the preparation method thereof disclosed by the invention, by optimizing the molecular structure of the yellow leuco dye and the matching relationship between the yellow leuco dye and a color developing agent, the ink can quickly develop under the conditions of low temperature, slight pressure or low-concentration acid / metal salt, the developing effect is distinct, and handwriting or patterns are clear and visible; by selecting a yellow leuco dye with better photostability of a color body after color development and introducing an antioxidant component, the color fading of a color development product under the irradiation of ultraviolet and visible light is effectively delayed, and the storage period of color development images and texts is prolonged; by improving an ink formula and a packaging process, the ink can keep good leuco stability in different environments such as high temperature, high humidity, low temperature and the like, and the phenomena of self color development, non-uniform color development and the like are prevented. The ink is colorless or light in color under normal conditions, can show bright yellow after being stimulated by acid, metal salt or heat, and has the characteristics of high color developing sensitivity, clean background and wide application range, and the comprehensive performance of the ink is remarkably improved.

The invention provides a fluorescent probe compound for simultaneously detecting HClO and ONOO <-> at two sites as well as preparation and application of the fluorescent probe compound. According to the probe compound, N, N-dimethylaminothioformyl ester is used as a response group of HClO, and the fluorescent probe RhB-ClO for simultaneously detecting HClO and ONOO <-> is constructed by expanding a conjugated structure of rhodamine. The probe shows excellent selectivity, high sensitivity (the detection limits are 9.9 nM and 13.1 nM respectively), good light stability and real-time responsiveness (the response time is 30 s and 150 s respectively) on HClO and ONOO <->. The probe not only can realize dual-channel imaging of HClO and ONOO <-> under oxidative stress conditions, but also can visualize the ferroptosis process of cells, a Parkinson's disease model and changes of HClO and ONOO <-> levels in an APAP-induced liver injury model. In addition, RhB-ClO can also be used for screening potential candidate drugs for nerve injury and liver injury, and it is proved that luteolin and piplongumine can be used as candidate antioxidant drugs.

The invention discloses an organic mildew preventive for a light degradation resistant water-based paint as well as a preparation method and application of the organic mildew preventive, and the organic mildew preventive comprises the following raw material components in parts by weight: 0.10-2.00 parts of an isothiazolinone organic mildew preventive, 0.50-5.00 parts of a triazole organic mildew preventive, 3.00-10.00 parts of isopropanol, 3.00-10.00 parts of vegetable oleic acid and 0.10-1.20 parts of a rare earth light stabilizer. According to the invention, through specific types and proportions of the rare earth light stabilizer and the organic light stabilizer, a synergistic effect between the rare earth light stabilizer and the organic light stabilizer is realized, functional complementation is promoted, a multiple stabilization mechanism is initiated, and the rare earth light stabilizer and the organic light stabilizer have the advantages of high stability, low cost and high efficiency. The light stability of the organic mildew preventive in an outdoor environment is obviously enhanced.

Aspects of the application provide methods of identifying and sequencing proteins, polypeptides, and amino acids, and compositions useful for the same. In some aspects, the application provides methods of obtaining data during a degradation process of a polypeptide, and outputting a sequence representative of the polypeptide. In some aspects, the application provides amino acid recognition molecules comprising a shielding element that enhances photostability in polypeptide sequencing reactions.

The invention discloses a production method of petroleum-based furnace carbon black, the carbon black produced by the method and application of the carbon black. The production method comprises the following steps: reacting fuel with an oxidizing agent to generate combustion gas flow; raw materials are introduced into the reaction furnace to be mixed with high-temperature combustion airflow; after the raw material is introduced into the reaction furnace and before the cooling water is injected, introducing a titanium-containing material flow at a position which is' L 'away from the downstream of the raw material introduction point; the raw materials, the titanium-containing material flow and the combustion gas flow react in a reaction zone to generate the titanium-treated carbon black, then the carbon black is cooled, separated and recycled, and the titanium-treated carbon black obtained by the method shows better shading property and light stability when being applied to the fields of printing ink, paint, coating, plastics and the like, and shows better dispersity in water-based color paste at the same time.

The invention discloses a photoetching machine multi-light-source cooperative high-precision exposure control system, and relates to the technical field of photoetching machine control. Initial energy parameters of all light sources are obtained, a coupling feature set of energy change and light spot morphology change is constructed, and light intensity errors, phase errors and light spot distortion errors are used as input, so that a multi-light-source cooperative high-precision exposure control system is constructed; respectively generating an inter-light-source time sequence offset matrix and a light source energy compensation matrix, constructing a light source collaborative error model through matrix superposition and eigenvalue decomposition, inputting exposure disturbance obtained by real-time monitoring of a photoetching machine into the error model, and obtaining a primary compensation amount; a final target exposure compensation parameter is obtained by adopting a quadratic optimization algorithm under a constraint condition, and light source energy output, a light path phase and a pulse trigger time sequence are cooperatively adjusted according to the target exposure compensation parameter, so that energy deviation, phase drift and time sequence mismatch can be reduced at the same time, the exposure stability and the pattern forming precision are remarkably improved, and the image forming precision is improved. The method is suitable for high-resolution and multi-light-source photoetching equipment.

The invention discloses a lipid droplet specific fluorescent probe as well as a preparation method and application thereof, and relates to the technical field of biological medicines. The invention provides a structural formula of the lipid droplet specific fluorescent probe, and during preparation, 2-formaldehyde-6-(diethylamino) benzo [B] furan and a malononitrile derivative are used for preparing a fluorescent probe with an extended pi conjugated system under the action of an alkali environment; the fluorescent probe has the characteristic of intramolecular charge transfer (TICT), fluorescence in an aqueous solution is extremely weak, fluorescence in sunflower seed oil is remarkably enhanced, and the fluorescent probe has remarkable Stokes shift, excellent biocompatibility, excellent light stability and high signal-to-noise ratio. Meanwhile, the fluorescent probe shows extremely high sensitivity and signal-to-noise ratio in the aspect of cell lipid droplet imaging, and dynamic and accurate targeted imaging of lipid droplets can be easily realized. Therefore, the fluorescent probe disclosed by the invention is expected to become an alternative scheme for accurate detection of atherosclerosis.

Described is an ophthalmic device that contains visible light filters. The invention provides an ophthalmic device that is a free radical reaction product of a reactive mixture comprising: one or more monomers suitable for making the ophthalmic device; a first visible light filtering compound, the first visible light filtering compound having a visible light absorption maximum between 430 and 480 nm and a full width half maximum at the visible light absorption maximum of at least 35 nm and up to 150 nanometers, wherein the first visible light filtering compound is photostable, and wherein the first visible light filtering compound has a molar extinction coefficient of at least 7740 L·mol−1·cm−1; and a second visible light filtering compound having a visible light absorption maximum between 480 and 530 nm and a full width half maximum of at least 50 nanometers and up to 150 nanometers. The reactive monomer mixture may also contain a third visible light filtering compound. The devices may provide one or more vision benefits, including enhanced macular pigment optical density as well as improved color perception and color enhancement and diminished visual artifacts.

The invention discloses a real-time positioning method for a weld track, and belongs to the technical field of laser positioning, and the method comprises the steps: obtaining an environment state coefficient based on the environment light intensity and the temperature of a structured light emitter; a welding state coefficient is obtained based on the welding smoke particle concentration and the arc light intensity; acquiring an environment stability coefficient based on the welding state coefficient and the environment state coefficient under the vibration amplitude of the current structured light emitter; obtaining a structured light stability coefficient based on the laser wavelength, the line width and the power of the structured light emitter; obtaining a distance-reflection matching degree based on the laser working distance and the workpiece surface reflectance under the environment stability coefficient and the structured light stability coefficient; constructing a divergence angle optimization model based on the distance-reflection matching degree and the current laser divergence angle to output a target laser divergence angle; according to the method, high-precision real-time positioning of the welding seam track under the strong interference environment is achieved through multi-model cooperation, and the robustness and adaptability of a welding automation system are remarkably improved.

The utility model relates to a kind of vegetable hydroponic device with LED intelligent lighting system, relate to a kind of indoor planting vegetable hydroponic device, to solve the problem that light source in existing vegetable hydroponic device is difficult to realize dynamic spectrum regulation and poor light supplement stability.The growth box, seedling box and nutrient solution tank of the new type are sequentially arranged from top to bottom;Seedling box is used to cultivate seedling;Growth box is used to hold transplanted seedling;Nutrient solution tank is used to store nutrient solution;Illumination sensor is used to obtain the illumination of seedling, preset illumination threshold in main control unit, illumination sensing signal is compared with illumination threshold, and illumination instruction is generated according to comparison result;The illumination instruction output end of main control unit is connected with the illumination instruction input end of three-dimensional light supplement LED light source;Three-dimensional light supplement LED light source emits light according to illumination instruction, and irradiates growth box.Affirmative effect is to improve the light energy utilization rate when high crown layer vegetable is planted and improve the stability of light supplement.

The invention relates to the technical field of nano materials and biomedical engineering, and discloses a dye-sensitized rare earth up-conversion luminescent nano material as well as a preparation method and application thereof. The dye-sensitized rare earth up-conversion luminescent nano-material comprises a rare earth doped up-conversion nano-particle core, an unsaturated fatty acid salt self-assembled shell layer and a near-infrared dye modified on the surface of the rare earth doped up-conversion nano-particle. The unsaturated fatty acid salt coating layer endows the material with excellent water dispersibility through a hydrophilic group; a hydrophobic chain segment and an unsaturated double bond can effectively block water and oxygen permeation and quench singlet oxygen, so that the photobleaching half-life period of the material is increased by 86.7 times or more compared with that of a conventional coating material, and the light stability is excellent; the material successfully realizes efficient up-conversion luminescence under excitation of a low-power near-infrared light emitting diode (NIR LED, the power density of which can be as low as 100mW / cm < 2 >), and thoroughly gets rid of dependence on a high-cost and high-risk laser.

The application belongs to the field of photoelectric functional materials, and discloses a blue light excitable Cu-based fluorescent material and a preparation method thereof. The material is obtained by room temperature reaction of 4-pytrz and halogenated cuprous CuX (X=Br, I), wherein 4-pytrz is 4-(4H-1,2,4-triazole-4-yl)pyridine. Two highly stable coordination polymers, complex 1 [CuBr(4-pytrz)2] n and complex 2 [Cu2I2(4-pytrz)] n are designed and synthesized, which have good thermal stability, exhibit a wide excitation band covering from deep ultraviolet light to blue light region, and have a quantum efficiency of 19.36% under blue light excitation. The complexes exhibit effective solid-state emission and enhanced light stability, and have wide application prospects.

The present invention relates to the technical field of organic light-emitting materials, and provides a tetradentate cyclometalated platinum (II) complex based on an oxygen atom linkage and containing phenyl acridine and an application thereof. The tetradentate cyclometalated platinum (II) complex has the structure as represented by general formula (I). (I) The cyclometalated platinum (II) complex in the present invention adopts a tetradentate ligand, is high in rigidity, and can improve the light stability of a light-emitting material. At the same time, the complex molecule can strongly emit light, and therefore can be used as a light-emitting material in an OLED device.

The application discloses an aggregation-induced emission microsphere with colorimetric-fluorescent double signals and a preparation method and application thereof. The aggregation-induced emission microsphere comprises carboxyl polystyrene microspheres and aggregation-induced emission dyes embedded in the carboxyl polystyrene microspheres; and the structural formula of the aggregation-induced emission dyes is as follows: The aggregation-induced emission microsphere has colorimetric-fluorescent double signals, is red under natural light, has strong absorption at 600 nm, and shows high light-emitting efficiency at 725 nm, effectively avoids the interference of biological autofluorescence, reduces background interference, has good light stability and light bleaching resistance, and has high molar extinction coefficient, so that the aggregation-induced emission microsphere has colorimetric and fluorescent double signal output capabilities. In addition, the preparation process of the aggregation-induced emission microsphere has high reproducibility, has the potential for large-scale synthesis, and meets the needs of industrial batch production.

The application is a divisional application of Chinese patent application No. 202011250638.2 entitled "Structure of steric hindrance adjustable weak base light stabilizer and preparation method and application thereof". The present application belongs to the field of new compounds and their synthesis methods, and specifically relates to a steric hindrance adjustable weak base light stabilizer and a preparation method and application thereof. The innovative light stabilizer of the present application adjusts the steric hindrance by establishing the size of the substituent group that produces steric hindrance around the nitrogen atom in the general structure. In addition, by adjusting the distance of the polar group, the electronegativity of the nitrogen atom can be affected, thereby adjusting its basicity or nucleophilic property. By adjusting the steric hindrance and nucleophilic property or basicity of the nitrogen atom in the environment, the desired effect is obtained, and the application range of the innovative light stabilizer is widened, so that it is widely applicable to PC, polyester, PU, PVC and other acidic or electrophilic polymer materials as a light stability protection aid.