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Near-infrared long-afterglow luminescent material having photo-stimulated luminescence and its preparation method and use

A luminescent material and light-excited technology, applied in luminescent materials, chemical instruments and methods, preparations for in vivo experiments, etc., can solve problems such as inability to achieve multiple detections, luminous intensity attenuation, etc., to increase afterglow time, increase Effect of Luminous Intensity

Inactive Publication Date: 2014-04-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The characteristic of long afterglow materials is that the luminous intensity gradually decays with the increase of time. At the same time, the long afterglow effective excitation light of long afterglow materials is often located in the ultraviolet band, and ultraviolet light and visible light are strongly absorbed by tissue cells in the body, so when When the afterglow intensity of the marked material decreases to a position where the detection equipment cannot respond, the imaging has to be stopped, so the general long afterglow material imaging can only be used for one inspection, and multiple inspections cannot be realized

Method used

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  • Near-infrared long-afterglow luminescent material having photo-stimulated luminescence and its preparation method and use
  • Near-infrared long-afterglow luminescent material having photo-stimulated luminescence and its preparation method and use
  • Near-infrared long-afterglow luminescent material having photo-stimulated luminescence and its preparation method and use

Examples

Experimental program
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Embodiment 1

[0032] According to the following composition: near-infrared long afterglow luminescent material LaAlO 3 :Mn x , wherein the doping amount x of Mn ions is 0.0001mol%; respectively weigh lanthanum oxide, aluminum oxide, and manganese carbonate, grind and mix them, pre-fire at 600°C for 4 hours, take them out, grind again, and fire at 1300°C 5 hours.

[0033] The fluorescence spectrum of the sample prepared in this embodiment is as follows: figure 1 As shown, fluorescence at 600nm-800nm ​​is emitted under excitation at 336nm, and the luminescence peaks are at 731nm, 725nm, 717nm, 710nm, 704nm, 698nm, and 691nm. figure 2 The excitation spectra corresponding to all the emission peaks are shown in , and the excitation peaks corresponding to all the monitored emission peaks are 336nm and a broad peak at 450nm-550nm with a peak of 500nm. image 3 The long afterglow fluorescence spectrum of the sample prepared in this embodiment is shown for 1 minute after being irradiated by sunl...

Embodiment 2

[0036] According to the following composition: near-infrared long afterglow luminescent material LaAlO 3 :Mn x , Ge n , where the doping amount x of Mn ions is 0.3mol%, and the doping amount n of germanium ions is 1mol%; respectively weigh lanthanum oxide, aluminum oxide, manganese carbonate, and germanium oxide, and pre-calcine at 900°C after grinding and mixing Take it out after 1 hour, grind it again, and fire it at 1450°C for 4 hours.

[0037] The fluorescence spectrum and excitation spectrum of the sample prepared in this embodiment are as follows: Figure 7The display shows that under the excitation of 336nm, the fluorescence at 600nm-800nm ​​is emitted, and the luminescence peaks are located at 731nm, 725nm, 717nm, 710nm, 704nm, 698nm, 691nm. The corresponding excitation peaks of all monitored emission peaks are 336nm and one 450nm-550nm, the peak is a broad peak at 500nm. Figure 8 The sample prepared in this embodiment was irradiated by sunlight for 10 minutes and...

Embodiment 3

[0039] According to the following composition: near-infrared long afterglow luminescent material LaAlO 3 :Mn x , Fe n , where the doping amount x of Mn ions is 0.5 mol%, and the doping amount n of iron ions is 5 mol%; respectively weigh lanthanum oxide, aluminum oxide, manganese carbonate, and iron oxide, and pre-calcine at 850°C after grinding and mixing Take it out after 12 hours, grind it again, and fire it at 1400°C for 5 hours.

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PUM

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Abstract

The invention discloses a near-infrared long-afterglow luminescent material having photo-stimulated luminescence. The near-infrared long-afterglow luminescent material has a molecular formula of ABO3: Mnx, Rn and in the molecular formula, A represents La, Y or Gd, B represents Al or Ga, R represents one of rare earth elements, germanium, titanium, silicon, zirconium, cobalt, nickel, tin, chromium and iron, x is greater than or equal to 0.0001mol% and less than or equal to 50mol%, and n is greater than or equal to 0mol% and less than or equal to 50mol%. The invention also discloses a preparation method and a use of the near-infrared long-afterglow luminescent material having photo-stimulated luminescence. The near-infrared long-afterglow luminescent material having photo-stimulated luminescence has photo-stimulated luminescence and photo-stimulated long-afterglow luminescence, realizes recycle of the long-afterglow materials and can be used for biological fluorescence labeling imaging well.

Description

technical field [0001] The invention relates to a near-infrared long-lasting luminescent material, in particular to a near-infrared long-lasting luminescent material with light-excited fluorescence and a preparation method and application thereof. Background technique [0002] Long afterglow materials are materials that can still be observed to emit light after a period of excitation (such as X-ray, ultraviolet light, visible light, electron beam, etc.) wait. The research objects of early long afterglow materials mainly focused on sulfides, such as ZnS: Cu (green light), CaS: Bi (blue light), CaS: Eu, Tm (red light), but the stability of sulfides is poor. The later developed rare earth doped aluminate long afterglow luminescent material (SrAl 2 o 4 :Eu 2+ , Dy 3+ ,CaAl 2 o 4 :Eu 2+ ,Nd 3+ ) and silicate materials (MgSiO 3 :Eu 2+ , Dy 3+ ,Mn 2+ , Ca 3 MgSi 2 o 8 :Eu 2+ , Dy 3+ etc.) Long afterglow time, high brightness, good water and alkali resistance. [...

Claims

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Application Information

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IPC IPC(8): C09K11/80A61K49/00
Inventor 邱建荣李杨李意扬董国平
Owner SOUTH CHINA UNIV OF TECH
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