44results about How to "Low excitation energy" patented technology

Provided is a light-emitting element with high emission efficiency including a fluorescent material as a light-emitting substance. In a light-emitting element including a pair of electrodes and an EL layer between the pair of electrodes, a delayed fluorescence component due to triplet-triplet annihilation accounts for 20% or more of light emitted from the EL layer, and the light has at least one emission spectrum peak in the blue wavelength range. The EL layer includes an organic compound in which an energy difference between the lowest singlet excited energy level and the lowest triplet excited energy level is 0.5 eV or more. The EL layer includes a benzo[a]anthracene compound.

The invention discloses a rare-earth nanometer metasilicate red fluorophor and the method for preparation. It contains the following setups: dissolving sensitizer activator substrate yttrium oxide in norbiline (or azotic acid), pressure-reduced distilling to eliminate water and excess acid, adding alcohol to prepare clear and transparent solution, and adding substrate silicon material to prepare transparent sol, pressure-reduced distilling to eliminate alcohol and acquiring powder solid, and adglutinating in 550-750 Deg. C by 2-4 hours to prepare the product. It prepares rare-earth nanometer red fluorescent powder in a low temperature (600 Deg. C) and a short time (3 hours), the average grain diameter being about 60-80 nm, the luminous intensity strong, chemical and optical property stable, the material easily obtained and cheap. Chemical expression formula of the rare-earth nanometer red fluorescent powder is as following: (YxSiy0z: Euj, Mn.

The invention discloses a two-photon deep red emission fluorescent probe for imaging cell membranes in tissues based on molecular rotors. The chemical name of the two-photon deep red emission fluorescent probe is N,N-di((4-(2(minute)-(4(second)-dodecyl)pyridine-4(second)iodide)ethylene)phenyl)phenylamine, and a chemical structural general formula is as shown in a formula (I). The invention also discloses application of the two-photon deep red emission fluorescent probe in marking or displaying cell membrane forms in the tissues and in living cells. A test verifies that the two-photon deep red emission fluorescent probe can be used for uniformly and continuously dyeing the cell membranes, bright two-photon deep red light can be emitted after the two-photon deep red emission fluorescent probe is bound to high-viscosity cell membranes because the two-photon deep red emission fluorescent probe is a rotor type molecule, the two-photon deep red emission fluorescent probe is indicated to have a very good prospect by being used as a cell membrane fluorescent probe, and the blank of a cell membrane probe in tissue imaging is hopefully to be filled; meanwhile, the two-photon deep red emission fluorescent probe has the characteristics that the application range is wide, the light stability is good, the cytotoxicity is low, and the cell membranes can be specifically imaged in the living cells.

The invention discloses rare earth doped fluorescent powder and a synthetic method thereof and application of the fluorescent powder in LED devices, and belongs to the technical field of luminescent materials. The general chemical formula of the fluorescent powder is MS[2-y]AyO[2+y]N[2-y-4z/3]Cz:Rx. According to the compound, C<4-> is substituted for N<3->, due to the fact that the electronegativity of C is smaller than that of N, the electron cloud expansion effect of the C<4-> is more obvious than that of the N<3->, after doping is conducted, rare earth ion 5d energy level splitting is increased, Stokes shift can change, and fluorescence parameters such as fluorescent peal and full half-peak width of the powder change. By adjusting generation of the above-mentioned doped ions, fluorescent powder with different fluorescent light colors and quantum efficiency can be obtained. The invention further discloses the application of the fluorescent powder in the field of LED devices. The fluorescent powder is applied to white LED light fixtures or light-emitting components which take blue LED or purple LED as a light source and can help to increase the color rendering indexes of the devices.

A triphenylamine terpyridine manganese complex having double functions including two-photon development and magnetic resonance development and a synthetic method thereof are disclosed. The structure formula of the complex is shown in the description. The complex has a two-photon development function and a magnetic resonance development function, and can be adopted as a contrast medium for double modes. Compared with a commercial nuclear magnetic contrast medium that is Gd-DTPA, the complex can be ingested by cells well so that magnetic resonance signals are enhanced.

The invention discloses an up-conversion fluorescent probe rhodamine derivative and an application thereof. The preparation method comprises the following steps: performing a reaction on rhodamine B and ethylenediamine in a nitrogen gas atmosphere and an organic solvent to obtain rhodamine-ethylenediamine; and performing a reaction on the rhodamine-ethylenediamine and phenyl isothiocyanate to obtain the up-convertion fluorescent probe rhodamine derivative. The up-conversion fluorescent probe rhodamine derivative provided by the invention has the high-efficiency down-conversion fluorescence-enhanced response recognition characteristics for mercury ions and has the high-efficiency up-conversion fluorescence-enhanced response recognition characteristics for the mercury ions when used as a fluorescent probe.

The invention discloses membrane permeability dye with a large two-photon fluorescence active cross section. The dye adopts triphenylamine heterocyclic chemical compounds, and the chemical structure of the dye is shown in the formula (I). The invention further discloses an application of the dye in displaying two-photon imaging of cytoplasm in a living cell. Experiments show that the dye has characteristics of larger two-photon fluorescence active absorption cross section, excellent cell membrane permeability, low toxicity and the like, also has the characteristics of wide application range, low price and good bio-compatibility with known probe DAPI (4',6-diamidino-2-phenylindole) and has wide application prospect in the field of laser excitation fluorescence biomarkers.

The invention discloses a manganese-doped metal sulfide red fluorescent powder and a preparation method thereof. The chemical formula of MnxM[7-x]In28S52(SH)4.[H<+>-DBN]8.[H<+>-PR]4, wherein M is Cd<2+> or Zn<2+>, DNB is 1,8-diazadicycloundecylenic-7-ene, and the molecular formula is C7H12N2; PR is piperidine of which the molecular formula is C5H11N; and x is the doping amount of manganese, and 0< x<=7. The manganese-doped metal sulfide red fluorescent powder is prepared by a solvothermal process. Under the excitation of 350-550nm light, the fluorescent powder can emit red fluorescence of which the central wavelength is 610-650nm, and the fluorescent powder has high luminescent intensity. Compared with the traditional red fluorescent powder synthesis process, the preparation method disclosed by the invention has the advantages of simple equipment, mild reaction conditions, high preparation speed and economical raw materials; the reaction temperature does not need to achieve 1000 DEG C; and the method does not use any rare earth ion, does not need any shielding gas during reaction, and thus, is suitable for industrial production.

The invention discloses an LED lamp integrating a single wire transmission drive control chip, which comprises an encapsulating colloid, a tube core and the single wire transmission drive control chip, wherein the tube core is connected with the output end of the single wire transmission drive control chip; and the tube core and the single wire transmission drive control chip are encapsulated into a whole to form the LED lamp which integrates the single wire transmission drive control chip and comprises an external power wire, an earth wire, an input signal wire and an output signal wire. The LED lamp has the advantages of simple structure, low cost, convenient use, improved hardware utilization ratio, easier circuit connection and high safety stability during PCB layout.

The invention discloses a fluorescent probe for detecting pyroglutamamide aminopeptidase I as well as a preparation method and application thereof. The method comprises the following steps: mixing LXY, HATU and DIPEA, completely dissolving the mixture in a dry dichloromethane solution, and carrying out a stirring reaction at 0 DEG C; then adding a TPAN solution, further conducting stirring and reacting at room temperature, and carrying out purifying after the reaction is finished so as to obtain a dark red solid BH1-BOC; dissolving BH1-BOC in anhydrous dichloromethane, adding a prepared trifluoroacetic acid solution under an ice salt bath condition, and carrying out room-temperature stirring reaction after dropwise adding is completed; spin-drying a solvent, adding dichloromethane, and repeating the above operations multiple times until the trifluoroacetic acid is completely spin-dried; and purifying a crude product to obtain a red solid BH1.

The invention discloses a Mn (II) complex with AIE property and a function of targeting living cell mitochondria as well as a preparation method and application of the Mn (II) complex, and relates to the technical field of multiphoton absorption materials. The Mn (II) complex is called FD-MnCl2 for short, and the structural formula is shown in the specification. The novel terpyridyl Mn (II) complex synthesized by the invention is a multi-photon absorption material with a cell developing function. Compared with other materials, the complex has the characteristics of large three-photon absorption cross section, low excitation energy, long wavelength, strong penetrability, small light damage and the like. The complex can be used for multi-photon biological imaging, and has obvious application value.

The invention discloses an anthracene-thiosemicarbazide derivative, a preparation method thereof and application of the derivative as a fluorescent probe. The preparation method comprises the following steps: 4-bromo-2-hydroxybenzaldehyde reacts with 9,10-diborate anthracene in a nitrogen atmosphere and in an organic solvent to obtain an intermediate product I; and then the intermediate product I reacts with thiosemicarbazide to obtain a copper ion fluorescent probe. The fluorescent probe of the invention has efficient up-conversion and down-conversion fluorescence quenching response recognition characteristics of copper ions.