161results about How to "Reduce quenching" patented technology

The invention provides an iridium complex used as a near-infrared luminous material and OLEDs (organic light-emitting diodes) comprising the iridium complex. The general structural formula of the iridium complex is LnIrX(3-n) or [LnIrX(3-n)]<+>Z<->, wherein Ir represents a central atom of the iridium complex, both L and X are ligands of the iridium complex, Z<-> represents an anion, n is equal to 1, 2 or 3, and L is selected from an L1 ligand, an L2 ligand or an L3 ligand with the general formula represented in the specification.

The invention discloses an adamantane-containing compound represented by general formula (1), and a high polymer, a mixture, a composition and an electronic device containing the same. Adamantane andan electron-deficient unit are connected to serve as a core unit, and then are matched with other functional units in order to effectively increase the intermolecular distance and reduce the intermolecular interaction, so the effects of reducing exciton quenching and improving the energy utilization rate are achieved, and the performances of the compound and the related device are further improved.

The invention discloses a method for treating organochlorine-pesticide-contaminated soil through activated persulfate oxidization, and belongs to the field of soil remediation. The method is characterized in that ferrous iron, hydrogen peroxide and activated persulfate are utilized to generate strong-oxidizability sulfate radical anion and hydroxyl free radical, thus realizing the oxidization and degradation of organochlorine-pesticide in soil. Compared with an existing Fenton method and a ferrous individually-activated persulfate method, the method has the advantages of being high in activating efficiency, and high in contaminant degradation efficiency; in addition, the method is simple to operate, wide in pH applying scope, obvious in oxidization and degradation effect, and high in potential in the field of environment and soil contamination control and treatment.

The invention relates to a blue light emitting functional material and the application, which relates to star shooting shape oligomer blue light emitting functional material and the application. The material is monodisperse star shooting shape oligomer on the basis of minami carbazolyl element, the oligomer has the structure of a general formula 1, the material contains minami carbazolyl element, has monodisperse star shooting shape three-dimensional space structure, is easy to form stable amorphous state, and displays excellent filming property and light emitting property. The material has potential application in the fields such as organic electroluminescence, organic laser, organic non-linear optical material and the like. Particularly, organic electroluminescent devices which utilize the functional material to be blue luminescent material have improved luminescent brightness, device efficiency, color purity and spectroscopic stability.

The invention provides a 6-mesitylene-6H-6-boron hetero benzo[cd]pyrene derivative containing substituted or non-substituted carbazolyl. Due to the bipolar transmission characteristic, the derivative can effectively balance transmission of carriers and improve transmission efficiency, by using the derivative in phosphorescent organic light-emitting devices as a main material. The invention also provides an organic electroluminescent device that has increased current efficiency, reduced turn-on voltage and good stability, and solves the problems of low transmission efficiency or poor stability of phosphorescent organic light-emitting main materials in the prior art.

The invention provides a quantum dot light emitting diode comprising an anode, a hole injection layer, a hole transmission layer, a quantum dot luminescent layer, an electron transmission layer and a cathode which are arranged in turn. The quantum dot light emitting diode also comprises an anode modification layer which is arranged on the anode and the hole injection layer. The anode modification layer includes fluorine containing organic material. According to the quantum dot light emitting diode, the fluorine containing organic material acts as the anode modification layer which is arranged between the anode and the hole injection layer, and the fluorinated substituent exerts a high electron withdrawing effect by its high electronegativity so as to enhance hole injection; besides, the chemical property of the fluorine containing organic material is stable so that the luminous efficiency of the quantum dot light emitting diode can be stably enhanced and the service life can be prolonged.

The invention discloses an acrylate copolymer-modified metal oxide, a QLED and a preparation method. The method comprises the steps of adding an acrylate copolymer solution to a pre-prepared metal oxide solution under a certain atmosphere and then stirring at 60-80 DEG C for 0.5-8h to obtain a mixed solution; and adding a solvent to purify the mixed solution and carrying out centrifugal separationto obtain a white precipitate, wherein the white precipitate is the acrylate copolymer-modified metal oxide. The metal oxide is modified by using an acrylate copolymer, so that on one hand, the acrylate copolymer-modified metal oxide can play roles in passivating surface defects of the metal oxide and reducing exciton quenching and carrier recombination through the surface defects, and on the other hand, the surface potential of the metal oxide can be improved, thereby improving the electron injection level and the electron transport capacity; and furthermore, the acrylate copolymer is capable of improving the dispersity of metal oxide nanoparticles, thereby facilitating formation of a smooth film and improvement of the transmittance of the film.

The invention relates to a compounded quindoline derivative as shown in the formula (1), wherein Ar1 and Ar2 are respectively independently selected from C6-C40 substituted or unsubstituted aromatic groups, or can be connected to form C3-C40 substituted or unsubstituted fused aromatic groups. The invention also relates to an application of the compound in organic electroluminescence devices, especially to an application of the compound used as a luminescence host material of OLED devices.

A compound is provided which is represented by the following general formula (I) or (II) as shown in the description, wherein X is selected from CR4 or N; R1 to R4 are each independently selected fromhydrogen, C1-C10 alkyl, substituted or unsubstituted C5-C60 aryl or heteroaryl, the aryl or heteroaryl substituent is selected from deuterium, fluorine, methyl, methoxy, cyano, phenyl, biphenyl, naphthyl, phenanthrenyl, pyridyl, furanyl, thienyl, indenyl, benzofuranyl, benzothienyl, substituted or unsubstituted indolyl, dibenzofuranyl, dibenzothienyl, substituted or unsubstituted carbazolyl, benzocarbazolyl, dibenzocarbazolyl, and the indolyl and carbazolyl substituents are selected from phenyl, biphenyl, naphthyl, phenanthrene. The dashed line and Cy in the general formula (II) represent a five-membered or six-membered aromatic ring or an aromatic heterocycle fused with a pyrimidine ring. The compound can be used in organic electroluminescence devices. The invention also provides an organic electroluminescence device comprising the compound.

The invention relates to a magnetic fluorescent double-function nanocomposite in the technical field of nano materials. The nanocomposite comprises a fluorescent carbon quantum dots of which the surface modification is provided with carboxyl groups, and magnetic nano composite microspheres which comprise Fe3O4 magnetic nano particles and SiO2 embedding layers, wherein the surface modification of the magnetic nano composite microspheres is provided with amino groups; and the carboxyl groups on the surfaces of the fluorescent carbon quantum dots are in chemical coupling connection with the aminogroups on the surfaces of the magnetic nano composite microspheres. According to the invention, connecting agents EDC (1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride) and NHS (N-hydroxysuccinimide) are adopted, the magnetic nano particles are connected with the fluorescent carbon quantum dots through forming chemical bonds, the chemical stability is good, and meanwhile the magnetic fluorescent double-function nanocomposite has the advantages of good water solubility, low toxicity, good biocompatibility and the like.

The invention relates to preparation and application of a nano-micelle imaging agent for a cervical cancer sentinel node. A nanometer imaging agent high polymer PEG-PLGA is used as a carrier, micelleparticles are formed through polymerization, indocyanine green is loaded inside, TMTP1 targeting peptide is modified on the surface of a micelle, and maleic amide connected with a surface hydrophilicgroup PEG end of the micelle is connected with a sulfhydryl group of TMTP1 with ring formation by amido bonds at the head and the tail. The near infrared fluorescence nano-micelle diagnosis reagent provided by the invention can image the cervical cancer sentinel node in real time, can distinguish whether tumor cell metastasis occurs or not, and offers the assistance for the imaging diagnosis of intraoperative lymph nodes of cervical cancer in clinic in the future and the guidance of individualized treatment of tumor patients.

The invention discloses an N type organic thin-film transistor and a manufacturing method thereof. The transistor comprises a substrate, a gate electrode, a gate insulation layer, a decorative layer, an organic semiconductor layer, a source electrode and a drain electrode, wherein the organic semiconductor layer comprises a first organic semiconductor layer and a second organic semiconductor layer made of N type organic semiconductor materials, and a current carrier barrier layer and the decorative layer are arranged between the first organic semiconductor layer and the second organic semiconductor layer. In the N type organic thin-film transistor, the current carrier barrier layer is introduced, thereby forming two channels on a device, reducing the phenomena of impacting, scattering and quenching of current carriers under a high biasing condition, and increasing the migration rate of the current carriers of the device; the decorative layer is introduced, thereby causing the organic semiconductor layer to have a better surface appearance, providing a better contact surface and promoting the transmission capability of current carriers in the channels; and a multilayer structure has a protection function, thereby promoting the stability of the transistor under an atmospheric environment.

The key of a preparation method for metasilicate scintillation crystals doped with 3-valence Ce ions is that its growing formula is doped with 3-valence Ce compounds which can be any one of the followings : Ce(OH)3, Ce2 ( C2 O4)3, Ce (CH3 Co6)3 and Ce2 (CO3)3. The raw material is sintered and grown in the neutral atmosphere and the crystals can reduce the quenching to Ce3+ illumination and increase its scintillation performance for about 5%-10%.

The invention relates to a magnetic fluorescent coding microsphere and a preparation method thereof. Firstly, during magnetic particle synthesis, medium-chain and short-chain fatty acids are used formodifying the surfaces of magnetic nanoparticles, so that the polarity of the surfaces of the magnetic nanoparticles is increased, the magnetic nanoparticles can be uniformly dispersed in a good solvent, and the particle size is more uniform; then, a two-step swelling method is adopted, which comprises the following steps: firstly, enabling magnetic nanoparticles to enter swelled polymer microspheres; enabling the fluorescent dye to enter the swollen polymer microspheres to form a 'magnetic particle core-fluorescent shell layer' structure, and reducing quenching and shielding effects of the magnetic particles on fluorescence to the greatest extent; then, by utilizing the swelling fading effect of the microspheres in a poor solvent, sealing cracks generated on the surfaces of the microspheres due to the swelling effect, avoiding leakage of magnetic nanoparticles and fluorescent dyes, greatly simplifying the sealing process, and obtaining the magnetic fluorescent coding microspheres withgood microsphere particle uniformity, good magnetic performance and good fluorescent performance.

The invention provides an organic light-emitting device, which comprises a base plate layer, a first electrode layer, a light-emitting layer and a second electrode layer, wherein the base plate layer, the first electrode layer, the light-emitting layer and the second electrode layer are laminated in sequence; the organic light-emitting device also comprises a blocking layer arranged between the first electrode layer and the light-emitting layer or between the second electrode layer and the light-emitting layer; the blocking layer comprises a light-emitting main body material; the triplet-state energy level T1 of the light-emitting material is not less than 2.5ev. As the organic light-emitting device which is provided by the invention is provided with the blocking layer comprising the light-emitting main body material, the light-emitting main body material has the quite high triplet-state energy level T1, and when being used as the blocking layer, can block the diffusion of triplet-state excitons; the annihilation of the excitons is reduced; therefore, the service life of the organic light-emitting device is prolonged.

The invention provides a silica fluorescent immunolabeled probe based on fluorescence resonance energy transfer as well as a preparation method and application of the silica fluorescent immunolabelledprobe. The preparation method comprises the steps of using mesoporous silica nanoparticles as matrix, and constructing a fluorescence resonance energy transfer system (RB-BODIPY-FRET) by doping rhodamine B and BODIPY. The fluorescent labeling probe is coupled by using a sodium periodate oxidation antibody, so that a reliable basis is provided for the super-sensitive detection and immunoassay of nano-drug carriers. Compared with the prior art, the silica fluorescent immunolabeling probe is prepared by means of codoping of fluorescent dyes, i.e., the BODIPY and the rhodamine B, and fluorescenceresonance energy transfer occurs between the two fluorescent dyes, so that the fluorescence intensity is increased, and quenching is reduced; the fluorescent labeled probe is coupled by using the sodium periodate oxidation antibody, so that the coupling efficiency is improved, and the influence of a cross-linking agent on the activity of the antibody is eliminated.

The invention belongs to the technical field of photoelectric detection, and specifically relates to an organic and inorganic hybrid perovskite photoelectric detector and a preparation method thereof.According to the organic and inorganic hybrid perovskite photoelectric detector and the preparation method thereof, CH3NH3I after coating for three times is regarded as an induction layer for growthof an organic and inorganic hybrid perovskite light-sensitive layer, a precursor solution for growth of the organic and inorganic hybrid perovskite light-sensitive layer is improved, the method of theannealing process is improved, and the detection rate and the lifetime of the organic and inorganic hybrid perovskite photoelectric detector are greatly increased and prolonged.

The invention relates to a quantum dot fluorescent microsphere chromatography kit for simultaneously detecting mixed contamination of aspergillus flavus metabolites cyclopiazonic acid and aflatoxin. The kit comprises a fluorescent chromatography test strip, and a sample reaction bottle containing an anti-cyclopiazonic acid monoclonal lyophilized antibody labeled by the quantum dot fluorescent microsphere and an anti-aflatoxin monoclonal lyophilized antibody labeled by the quantum dot fluorescent microsphere. The anti-cyclopiazonic acid monoclonal antibody is secreted by a hybridoma cell strainYTT-2 with a preservation number of CCTCC NO. C201871. The kit of the present invention can be used for simultaneously detecting cyclopiazonic acid and aflatoxin and has simple and rapid operation and high sensitivity.

The invention provides a method for quantitatively detecting an MFAP (PSI-OAm-NAPI) nano-drug carrier by fluorescence immunoassay. Mesoporous silica nano-particles are taken as a substrate, a silicondioxide nano particle has the advantages of large specific surface area and good stability, and the loading rate of fluorescent dye is high; fluorescent dye-boron dipyrromethene dyes (BODIPY) and rhodamine B are doped, two fluorescent dyes can generate fluorescence resonance energy transfer, fluorescence intensity is improved, and quenching is reduced; a sodium periodate method coupling antibody is adopted to improve coupling efficiency, and the influence of a cross-linking agent for antibody activity is eliminated. The high specificity of the antigen antibody in immunology reaction is fully utilized, in addition, the high specificity is combined with the sensitivity of fluorescence, an immunoreaction signal is further improved, and the ultra-sensitive detection of the nano-drug carrier isrealized.

The invention relates to an atmosphere on-line mercury analyzing instrument with a light trap assembly. The atmosphere on-line mercury analyzing instrument with the light trap assembly is characterized by comprising a light source, a light source cavity, an entrance lens, an entrance slit, a light cavity, a photoelectric detector seat and a light trap, wherein the light source is longitudinally fixedly arranged in the light source cavity; light emitted from the light source is spread in the light source cavity and is transmitted to the entrance lens which is fixedly connected to one side of the light source cavity; light exiting from the entrance lens is transmitted to the light cavity via the entrance slit; an air inlet and an air outlet are respectively correspondingly formed in the top and the bottom of the light cavity; a fluorescent window is formed in one side of the light cavity; a light filter is fixedly arranged on the fluorescent window; the photoelectric detector seat for placing a photoelectric detector is arranged at a light exiting position corresponding to the fluorescent window; the photoelectric detector is used for detecting atomic fluorescence which is generated by stimulating a gaseous mercury sample through a light source; and incident light exiting from the light cavity enters the light trap and is absorbed. The atmosphere on-line mercury analyzing instrument with the light trap assembly can be widely used for monitoring the total concentration of gaseous mercury in atmosphere.