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

The invention belongs to the technical field of organic optoelectronics, and discloses an organic ultraviolet detection device based on iridium complex phosphorescent material doping, which is used to solve the problem of low photoresponsivity of the organic ultraviolet detection device. The present invention includes a bottom-up transparent substrate, a conductive anode, an anode buffer layer, an electron blocking layer, an ultraviolet photoactive layer, a hole blocking layer and a metal cathode, and is characterized in that the components of the ultraviolet photoactive layer and The weight percentage of each component is: 56-60% of electron donor; 34-39% of electron acceptor; 1-10% of iridium complex phosphorescent material. The iridium complex phosphorescent material of the present invention has strong ultraviolet light absorption, relatively long phosphorescence lifetime and good thermochemical stability, and is effectively combined with the donor-acceptor mixed material, and through the phosphorescence effect of the iridium complex, the The absorbed short-wavelength ultraviolet light is transferred to the electron acceptor through the triplet state energy, which improves the generation efficiency of excitons and improves the photoresponsivity of the device.

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 discloses a preparation method and application of a water-phase room-temperature phosphorescent carbon dot material, and belongs to the field of functional luminescent carbon material manufacturing. The present invention mixes carbon source, molten salt matrix, alkaline earth metal salt and hydrogen phosphate for carbonization, after carbonization, cools down to room temperature, washes and removes the molten salt matrix of the prepared material, and obtains room temperature phosphorescent carbon with water dispersion properties point material. The method of the invention effectively solves the problem that the existing carbon-dot phosphorescent materials cannot be used in the water phase, has a short lifespan and complicated preparation methods, and can simply produce large batches of room-temperature phosphorescent materials that can be used in the water phase.

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 relates to a one-pot method for preparing solid room-temperature phosphorescent carbon dots. The method is based on a hydrothermal method, using terephthalic acid and sucrose as raw materials, using water as a solvent, reacting at 120-180°C for 2-8 hours, and purifying and freeze-drying to obtain solid room temperature phosphorescent carbon dots. The method is simple, easy to obtain raw materials, does not require low temperature, oxygen-free environment, and does not need to add any matrix, and has potential application value in anti-counterfeiting, information encryption, optical devices and other fields.

The invention relates to an immunochromatography test strip marked by phosphorescent silica nano particles and used for quantitatively detecting cimaterol and a preparation method for the immunochromatography test strip. The test strip comprises a supporting layer, an adsorption layer and a protecting layer, wherein the adsorption layer sequentially comprises an adsorption fiber layer, a phosphorescent antibody fiber layer, a cellulose membrane layer and a water absorbing material layer at a handle end from a testing end; invisible detecting blotting printed by a carrier protein solution of coupling cimaterol and invisible comparison blotting printed by an anti-goat or anti-rabbit mouse IgG antibody solution are arranged on the cellulose membrane layer; the phosphorescent antibody fiber layer is made from glass cellucotton adsorbing phosphorescent antibody; and the phosphorescent antibody is cimaterol antibody marked by the phosphorescent silica nano particles. The test strip is high in specificity and sensitivity, is simple, convenient, visualized and accurate, can be used for quantitative and qualitative detection, can detect pg-scale trace residues to the minimum degree, and is wide in application range, low in cost and easy to popularize and apply.

The preparation method of a kind of iridium complex / polymethyl methacrylate phosphorescent fiber of the present invention is that the neutral iridium complex containing 24-crown-8 group is dissolved in the DMF solution of polymethyl methacrylate, is made into (FPyCr) with a mass ratio of 5% 2 Irpic / PMMA precursor solution, and then at a voltage of 15 kv, a medical syringe with a needle diameter of 0.5 mm was used as a spinning nozzle, and the extrusion speed of the precursor solution was controlled at 0.3 mL / h. After spinning, it was vacuum-dried at 80 °C for 12 hours, get (FPyCr) 2 Irpic and PMMA mass ratio of 5% iridium complex / polymethyl methacrylate phosphorescent fiber. The iridium complex / polymethyl methacrylate phosphorescent fiber of the present invention uniformly disperses the iridium complex in spinning, and the prepared fiber has the advantages of high luminous efficiency and long phosphorescence life, and has potential application value in wearable luminescent materials .

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 preparation method for phosphorescent quantum dots Mn-ZnS and a method for using phosphorescent quantum dots Mn-ZnS for detecting iron ions with different forms in a solution, aiming at selectively detecting the iron ions with different forms in the solution by virtue of phosphorescent changes at a room temperature. According to the method, a deoxidant and an inducer do not need to be added during detection for the iron ions with different forms in the solution, and the interferences of background fluorescence and scattered light can be avoided; meanwhile, a complex sample pre-treatment process is not needed during detection for the iron ions with different forms in the solution; and although quantum-dot fluorescence analysis method is already widely applied, attentions on the phosphorescent properties of quantum dots and the application thereof in analysis and detection are few. Therefore, the phosphorescent quantum dots Mn-ZnS prepared by the preparation method disclosed by the invention are good in water solubility and stability, and great in application prospect in the aspects of detection for a solution or water sample and the like.

The invention discloses a nitrogen spot-based room temperature phosphorescent material and a preparation method and application thereof. The present invention obtains fluorescent nitrogen dots by using 2-azidoimidazole with high reactivity (azido group on the 2-position) as a precursor, and in the presence of a liquid nucleophile, performing self-polymerization and nucleophilic polymerization; and It is combined with the base material, that is, the method for preparing the room temperature phosphorescent material is simple and controllable, the energy consumption is low, the operation is convenient, the conditions are not harsh, and the reproducibility is good, which is beneficial to the expansion of production; the room temperature phosphorescent material prepared by this method has strong luminescence. , good stability, it still has excellent room temperature phosphorescence characteristics in amorphous or glassy state, ultra-long phosphorescence life and long afterglow time; it can be used in the fields of environmental detection, biochemical analysis, and can also be used for preparation spray Ink printing fluorescent ink, anti-counterfeiting signs, etc.

The present invention provides a diphenylamine derivative organic room temperature phosphorescent compound, which is characterized in that the structural formula of the diphenylamine derivative organic room temperature phosphorescent compound is shown in Formula 1, wherein R 1 , R 2 , R 3 , R 4 Each independently selected from one of hydrogen and C1-C6 alkyl. The diphenylamine derivative organic room-temperature phosphorescent compound has a long afterglow phenomenon, and its solid crystals can all undergo room-temperature phosphorescence, and the phosphorescence lifetime is as long as 660ms at room temperature. The invention also provides a method for preparing the above diphenylamine derivative organic room temperature phosphorescent compound, which has simple synthesis steps, mild preparation conditions, high yield and low cost, and is suitable for large-scale production. The above diphenylamine derivative organic room temperature phosphorescent compound can be applied to prepare anti-counterfeiting marks, anti-counterfeiting films and the like.