33results about How to "Long phosphorescence lifetime" patented technology

The invention discloses a light-adjustable room-temperature phosphorescent carbon dot material, a preparation method and applications thereof, and belongs to the technical field of preparation of luminescent carbon nanometer materials. The method comprises the following steps: weighing different inorganic salt powder, putting into a sample bottle, adding distilled water, fully stirring, drying, and grinding to obtain a uniform mixed salt system; and grinding a carbon source and the mixed salt system, putting the grinded materials into a crucible, carrying out heat preservation at 140-400 DEG Cfor 2-6 hours at a heating rate of 8-12 DEG C, and cooling to room temperature to obtain the carbon-based nanometer material with room-temperature phosphorescence. According to the invention, the method effectively solves the problems of complex preparation method, expensive raw materials, high toxicity and short-wavelength phosphorescence emission of the existing phosphorescent material, and canbe used for simply preparing a large batch of room-temperature phosphorescent materials with light adjustability.

The invention discloses a room temperature phosphorescent compound and a preparation method, a single crystal culture method and application thereof in the field of anti-counterfeit. According to the invention, through acylation reaction with the participation of aluminum trichloride or sodium hydride, benzoyl chloride and derivatives thereof react with carbazole, benzoyl or derivatives thereof are connected with carbazole through N atoms, and by changing R groups connected with the benzoyl, three room temperature phosphorescent compounds CPM (R=H), CMPM (R=CH3) and CMOPM (R=OCH3) are obtained, and then the three compounds are cultured into single crystals through a solvent volatilization method by using two solvents with different solubility, boiling point and volatility. The obtained single crystals can be used in the field of anti-counterfeit, and can be matched with a material with better fluorescence-emission ability in use to complete two modes: color reliquid and time reliquid. Especially, the phosphorescence life of the obtained compound CPM at room temperature reaches 748ms, so that the compound CPM can be practically used in the field of anti-counterfeit.

The invention relates to a method for preparing solid room-temperature phosphorescent carbon dots by a one-pot process. The method comprises the steps of subjecting benzenediboronic acid and saccharose, which serve as raw materials, to a reaction for 2 to 8 hours at the temperature of 120 DEG C to 180 DEG C by taking water as a solvent on the basis of a hydrothermal method, and carrying out purification and freeze drying, thereby obtaining the solid room-temperature phosphorescent carbon dots. The method is easy and feasible, is readily available in raw material, is free of low-temperature andoxygen-free environments, is free of any matrix addition and has a potential application value in the fields of anti-counterfeiting, information ciphering, optical devices and the like.

The invention provides an alkoxy, benzyloxy or bromine substituted xanthone derivative and a preparation method thereof. The xanthone derivative is simple in preparation method, has a phosphorescencepeak on a long wavelength peak and is long in phosphorescence service life and high in light emission efficiency. The preparation method of the xanthone derivative comprises the following preparationsteps: 1, putting phenol, potassium carbonate, DMF (Dimethyl Formamide) and methylbenzene into a reaction container, backflowing for 3-5 hours in a nitrogen environment, and carrying out dehydration treatment till the system has no water generation; removing the methylbenzene, recovering to the room temperature, adding 4-bromine-2-fluorobenzonitrile, backflowing for 3-5 hours in the nitrogen environment, after the reaction is completed, diluting the solution with 100mL of methylbenzene, filtering, washing with water, drying so as to obtain a crude product of a crystal, and purifying with a spectrum column so as to obtain an intermediate as shown in the specification; 2, mixing the intermediate obtained in the step 1 with water and sulfuric acid, heating to 150-200 DEG C in the nitrogen environment, stirring, and backflowing for 10-15 hours; after the reaction is completed, cooling to the room temperature, diluting with water, extracting by using trichloromethane and a saturated sodiumchloride solution, combining organic phases, drying, filtering, carrying out vacuum distillation so as to remove the solvent and obtain a crude product of a crystal, and purifying with a spectrum column, so as to obtain an intermediate as shown in the specification.

The invention discloses a method of selectively detecting thrombin by a phosphorescent probe. The phosphorescent intensity of a system is recovered as Mn doped ZnS phosphorescent quantum dots coated by MPA and a thrombin adapter are mixed with surfaces, far from the quantum dots, of TBA in a quenching system because of relatively high specificity combination between a thrombin adapter (TBA) and thrombin. Related to the phosphorescent quantum dots, the phosphorescent quantum dots are applied more widely in detection as the phosphorescent service life is long, interference of autofluorescence and scattered light can be avoided, the selectivity is high, no deoxidant and inductor are needed to be added during detection and the like. The phosphorescent quantum dots and TBA are not modified, sothat the synthetic steps are simplified to a great extent, and meanwhile, the experimental cost is also lowered. The method is high in accuracy and high in sensitivity, and has a very good applicationprospect in detection of an actual sample.

The invention discloses a nitrogen point-based room-temperature phosphorescent material and a preparation method and application thereof. The preparation method comprises the following steps: taking 2-azido imidazole with high reaction activity (azido at the 2 position) as a precursor, carrying out self-polymerization and nucleophilic polymerization in the presence of a liquid nucleophilic reagentto obtain a fluorescent nitrogen point; and enabling the fluorescent nitrogen point to be compounded with a substrate material so as to prepare the room-temperature phosphorescent material. The method for preparing the room-temperature phosphorescent material is simple, controllable, low in energy consumption, convenient to operate, not harsh in condition, good in reproducibility and beneficial to expanded production. The room-temperature phosphorescent material prepared by the method has the characteristics of strong luminescence and good stability, and still has excellent room-temperature phosphorescent characteristics, ultra-long phosphorescent service life and long afterglow time in an amorphous or glassy state; the material can be applied to the fields of environmental detection andbiochemical analysis, and can also be used for preparing fluorescent ink for ink-jet printing, anti-counterfeiting marks and the like.

The invention belongs to the technical field of organic photoelectrons, discloses an iridium complex phosphorescent material-based and doped organic ultraviolet detector, and aims at solving the problem of low photo responsivity of the organic ultraviolet detector. The iridium complex phosphorescent material-based and doped organic ultraviolet detector comprises a transparent substrate, a conductive anode, an anode buffer layer, an electron blocking layer, an ultraviolet active layer, a hole blocking layer and a metal anode from bottom to top. The organic ultraviolet detector is characterized in that the ultraviolet active layer comprises the following components in percentage by weight: 56%-60% of an electron donor, 34%-39% of an electron acceptor and 1%-10% of an iridium complex phosphorescent material. The iridium complex phosphorescent material disclosed by the invention has relatively high ultraviolet absorptivity, relatively long phosphorescence lifetime and good thermo-chemical stability, and is effectively combined with a donor-acceptor hybrid material; and through the phosphorescence effect of an iridium complex, the absorbed short-wave ultraviolet light is transmitted to the electron acceptor through triplet energy, so that the production efficiency of excitons is improved; and the photo responsivity of the detector is improved.

The invention discloses an organic phosphorescent material, a preparation method thereof, and an electroluminescent device containing the organic phosphorescent material. The organic phosphorescent material is a material containing a metal iridium complex, and the structural general formula of the organic phosphorescent material is shown in the specification. The organic phosphorescent material has high luminous efficiency and high strength, and can be applied to the organic electroluminescent device as a luminous host material, so that the driving voltage of the electroluminescent device is obviously reduced, the current efficiency of the device can be obviously improved, and the phosphorescence service life of the device can be obviously prolonged. In addition, the preparation method ofthe organic phosphorescent material is simple and convenient to operate, low in cost and suitable for market promotion and application.

The invention discloses a phosphorescent carbon dot. The phosphorescent carbon dot is prepared by the following method: 1) mixing vitamin B1 with ethylenediamine and carrying out hydrothermal treatment; 2) after the reaction is finished, centrifuging a product, and removing precipitate to obtain a carbon dot solution; 3) adding boric acid and carrying out hydrothermal treatment; and 4) after the reaction is finished, taking out a solid product, and grinding to obtain white powder, namely the phosphorescent carbon dots. The invention also provides an application of the phosphorescent carbon dot in anti-counterfeiting and information encryption and an LED lamp bead based on the phosphorescent carbon dot. According to the invention, phosphorescent carbon dots which can simultaneously show bright blue fluorescence emission and green RTP emission are prepared; the phosphorescence service life of the material is as long as 293 milliseconds, the macroscopic excellent green afterglow is as long as 7.0 seconds, and the phosphorescence quantum yield is as high as 12.69%; according to the method, a green strategy can be provided for extensible synthesis of the RTP carbon dot material, and the method has a great application prospect for manufacturing the RTP material with high efficiency and long afterglow life.

The invention relates to a phosphorescent compound and a preparation method thereof and an application of the compound to an electroluminescent device, and belongs to the technical field of luminescent materials. The phosphorescent compound disclosed by the invention has a structure represented by a formula C. The invention provides the phosphorescent compound with a novel structure, and the organic electroluminescent device prepared from the phosphorescent compound has relatively high luminous efficiency and relatively long phosphorescence lifetime. The preparation method of the phosphorescent compound provided by the invention has the advantages of simple process and high product yield.

The invention relates to an organic light-emitting material as well as a preparation method and application thereof, wherein the preparation method of the organic light-emitting material comprises the steps: dissolving a compound containing a quaternary ammonium structure in an alcohol solvent, standing until crystals are separated out, filtering, separating, and drying in vacuum to obtain the organic light-emitting material, wherein the compound containing the quaternary ammonium structure comprises one or more of tetramethylammonium bromide (TMAB), cetyltrimethylammonium bromide (CTAB), cetyltrimethylammonium chloride (CTAC) or cetyltrimethylammonium iodide (CTAI), and further comprises a double-end quaternary ammonium salt compound, and the material is applied to the optical field and/or the anti-counterfeiting and/or secrecy field. Compared with the prior art, the method has the advantages of simple synthesis steps, simple purification method and the like.

The invention discloses a preparation method of an iridium complex polymethyl methacrylate (PMMA) phosphorescent fiber. The preparation method comprises the following steps: dissolving a neutral iridium complex containing 24-crown-8-radical in a DMF (Dimethyl Formamide) solution of PMMA to obtain a (FPyCr)2Irpic/PMMA precursor solution of which the mass ratio is 5 percent; then, spinning at the voltage of 15kv by taking an injector for medical purpose as a spinning spray nozzle and controlling the extruding speed of the precursor solution at 0.3mL/h; at the end of spinning, drying in vacuum at the temperature 80 DEG C for 12 hours to obtain the iridium complex/PMMA phosphorescent fiber in which the mass ratio of (FPyCr)2Irpic and PMMA is 5 percent. By adopting the iridium complex/PMMA phosphorescent fiber, the iridium complex is dispersed in spinning uniformly; the prepared fiber has the advantages of high luminous efficiency, long phosphorescence service life and the like, and has a potential application value in the aspect of wearable light-emitting materials.

The invention relates to a preparation method of a room-temperature organic phosphorescent material with ultra-long phosphorescent lifetime, which comprises the following steps: by taking a polycyclic aromatic compound without heavy atoms and heteroatoms or a derivative thereof as a doping compound and taking a rigid polymer as a main body material, doping by a solution method, a melt method or a chemical polymerization method, thereby obtaining the room-temperature organic phosphorescent material with ultra-long phosphorescent lifetime. The room-temperature organic phosphorescent material with ultra-long phosphorescent lifetime is obtained. By adjusting the conjugation degree of the doped compound, the triplet state energy level of molecules is changed, the phosphorescence color of the material is regulated and controlled, and the phosphorescence lifetime gt is achieved; the phosphorescence effect gt visible to naked eyes is achieved; the method is widely applied to phosphorescent dyes, information encryption, information storage, biological imaging and oxygen detection.

The invention discloses a petroleum tracer agent, the petroleum tracer agent is a phosphorescent carbon quantum dot, the phosphorescent carbon quantum dot comprises a carbon quantum dot body and a loading agent, and the phosphorescent carbon quantum dot has a phosphorescent characteristic. The petroleum tracer agent has a phosphorescence property, the phosphorescence service life of the petroleum tracer reaches a millisecond level, and the detection limit of the petroleum tracer can reach 0.3 ppm; by using the petroleum tracer agent with phosphorescence performance, the interference of petroleum self-fluorescence can be effectively avoided, so that the detection sensitivity is improved, and the petroleum tracer agent is environment-friendly; the phosphorescent carbon quantum dots with different phosphorescent lives are simultaneously applied to the field of petroleum tracing, so that the phosphorescent carbon quantum dots can be conveniently distinguished in luminescence peak positions, and the detection efficiency and accuracy are greatly improved; and according to the oil field tracing method, the oil well communication condition can be accurately detected, and a detection basis is provided for oil well exploration.