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Long-lasting phosphorescent material with optical excitation characteristic for biological imaging and preparation method and application thereof
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A long afterglow luminescence and biological imaging technology, applied in luminescent materials, preparations for in vivo experiments, chemical instruments and methods, etc., can solve the problem that long afterglow materials cannot be re-excited and used
Active Publication Date: 2015-06-03
SOUTH CHINA UNIV OF TECH
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In this way, the long afterglow material can be reused repeatedly, and its light-excited luminescence characteristics can be well applied to bioluminescent labeling imaging, solving the worldwide problem that long afterglow materials cannot be re-excited and utilized
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Embodiment 1
[0024] According to the following composition: matrix Zn Z Ga Y Ge X o （Z+1.5Y+2X） ; Wherein, x=1, Y=2, Z=3, the doping amount of Cr ions is 0.1mol%; zinc oxide, gallium oxide, germanium oxide and chromium oxide are weighed respectively, and pre- After burning for 2 hours, take it out, grind it again, and burn it at 1150-1250°C for 3 hours.
[0025] The fluorescence spectrum of the sample prepared in this embodiment is as follows: figure 1 It is shown that luminescence at 698nm is emitted under excitation at 290nm, and the luminescence at 698nm corresponds to four excitation peaks, namely 290nm, 320nm, 400nm, and 515nm. figure 2 It shows the afterglow decay of the sample prepared in this embodiment after being irradiated with sunlight for 10 minutes and one hour after the excitation is stopped. The exponential decay curve shows the trapping mechanism. image 3 After 10 hours, the light-excited luminescence spectrum and its excitation spectrum of the sample are shown, and...
Embodiment 2
[0031] According to the following composition: matrix Zn Z Ga Y Ge X o （Z+1.5Y+2X） ; Among them, x=2, Y=1, Z=3, the doping amount of Cr ions is 2mol%; zinc oxide, gallium oxide, germanium oxide and chromium oxide were weighed respectively, and pre-calcined at 1000°C after grinding and mixing Take it out after 3 hours, grind it again, and fire it at 1150 for 5 hours.
Embodiment 3
[0033] According to the following composition: matrix Zn Z Ga Y Ge X o （Z+1.5Y+2X） ; where x=3, Y=3, Z=2, and the doping amount of Cr ions is 1mol%; zinc oxide, gallium oxide, germanium oxide, and chromium oxide were weighed respectively, and pre-calcined at 1000°C for 1 Take it out after 1 hour, grind it again, and burn it at 1200°C for 2 hours.
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Abstract
The invention discloses a long-lasting phosphorescent material with an optical excitation characteristic. The long-lasting phosphorescent material is characterized in that 0.001-2mol% of Cr ions are doped in a matrix ZnZGaYGeXO(Z+1.5Y+2X), wherein X is more than or equal to 1 and less than or equal to 3, Y is more than or equal to 1 and less than or equal to 3, and Z is more than or equal to 1 and less than or equal to 3. The invention further discloses a preparation method of the long-lasting phosphorescent material. The preparation method comprises the steps of: respectively weighing compound raw materials containing zinc, gallium, germanium and chromium, grinding and uniformly mixing the compound raw materials, taking out the compound raw materials after presintering for 1-3 hours at 1000 DEG C, and sintering the compound raw materials for 2-5 hours at 1150 DEG C to 1250 DEG C after regrinding. According to the long-lasting phosphorescent material with the optical excitation characteristic, the regulation and the control to the emission wavelength strength are realized by regulating an exciting power and an exciting wavelength, and the exciting can be carried out for multiple times, so that the long-lasting phosphorescent material can be well applied to biological fluorescence labeling imaging and used for solving the worldwide problem that the long-lasting material cannot be repeatedly excited and used.
Description
technical field [0001] The invention relates to a material used for biological living body imaging and biological fluorescent labeling, in particular to a long afterglow luminescent material with light excitation characteristics. Background technique [0002] With the development of biomedical research, the requirements for research objects are getting higher and higher. Biomedical researchers hope to directly observe the physiological and biological processes that occur in living bodies or small animals. At present, biomedical research mainly adopts the method of in vitro research after taking materials, such as establishing cell lines in vitro, making tissue slices, etc. The method of ex vivo research provides a lot of information and basis for the current research, and also greatly promotes the progress of biomedicine. However, with the deepening of understanding, the results of current biomedical research have shown us that the study of biological objects cannot be sepa...
Claims
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