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Europium-terbium co-doped luminescent material and preparation method and application thereof

A luminescent material, europium terbium technology, applied in luminescent materials, material analysis through optical means, analysis of materials, etc., can solve the problem of poor anti-interference ability of sensors

Inactive Publication Date: 2017-03-15
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these detection methods are all based on the enhancement of the fluorescence intensity of a single wavelength, and there are various degrees of errors caused by changes in the detection environment or the fluorescence intensity caused by the instrument itself, as well as the defects of the poor anti-interference ability of the sensor itself.

Method used

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  • Europium-terbium co-doped luminescent material and preparation method and application thereof
  • Europium-terbium co-doped luminescent material and preparation method and application thereof
  • Europium-terbium co-doped luminescent material and preparation method and application thereof

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preparation example Construction

[0054] The invention provides a preparation method of europium and terbium co-doped luminescent material, comprising the following steps:

[0055] A) After mixing and reacting adenine, 4,4'-biphenyldicarboxylic acid, zinc acetate dihydrate, a strong acid and a solvent, an intermediate product is obtained;

[0056] B) After mixing the intermediate product obtained in the above steps with the terbium source and europium source solution again and standing still, the europium and terbium co-doped luminescent material is obtained.

[0057] In the invention, adenine, 4,4'-biphenyldicarboxylic acid, zinc acetate dihydrate, strong acid and solvent are mixed and reacted to obtain an intermediate product.

[0058] The present invention has no special restrictions on the strong acid, and the strong acid well known to those skilled in the art can be used. Those skilled in the art can select and adjust according to actual application conditions, raw material conditions and product requirem...

Embodiment 1

[0080] step one:

[0081] Adenine (0.25mmol), 4,4-biphenyldicarboxylic acid (0.5mmol) and zinc acetate dihydrate (0.75mmol) were dissolved in a mixture of DMF (27mL) and water (2mL), stirred for 60 minutes, Nitric acid (2 mmol) was then added. The above solution was transferred to a 40 mL reaction kettle and heated at 130° C. for 48 hours. After cooling to room temperature, the needle-shaped crystals were obtained by suction filtration. The crystals were washed several times with DMF and dichloromethane, and vacuum-dried at 120° C. overnight to obtain sample 1.

[0082] Step two:

[0083] The sample 1 prepared in step 1 was added to a saturated DMF solution with a molar ratio of terbium and europium of 3:1, and left overnight. Suction filtration and drying overnight at 120° C. to obtain a europium and terbium co-doped luminescent porous material.

[0084] Detection is carried out on the europium and terbium co-doped luminescent porous material prepared in the above steps o...

Embodiment 2

[0087] Step 1: with embodiment 1;

[0088] Step two:

[0089] The sample 1 prepared in step 1 was added to a saturated DMF solution with a molar ratio of terbium and europium of 6:1, and left overnight. Suction filtration and drying overnight at 120° C. to obtain a europium and terbium co-doped luminescent porous material.

[0090] Detection is carried out on the europium and terbium co-doped luminescent porous material prepared in the above steps of the present invention.

[0091] see figure 2 , figure 2 Fluorescent response diagrams of the europium-terbium co-doped luminescent porous material prepared for Example 2 of the present invention with a terbium-europium molar ratio of 6:1 to different concentrations of DPA. It can be seen from the figure that the co-doped material in Example 2 has a ratiometric fluorescence response to DPA, the luminescence of europium gradually weakens and the luminescence of terbium gradually increases, and the detection limit of DPA is 15 ...

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Abstract

The invention provides a europium-terbium co-doped luminescent material. The material comprises one or more of the chemical compound as shown in the formula I, hydrates of the chemical compound as shown in the formula I and solvated compounds of the chemical compound as shown in the formula I, and the formula I is shown as Zn8 (Adenine)4(BPDA)6O EuxTb1-x I, wherein x is greater than 0.1 and less than 0.25, Adenine refers to adenine, and BPDA refers to 4,4'-biphenyldicarboxylic acid. Metal-organic frameworks with a porous structure serve as carriers, and the europium-terbium co-doped luminescent porous material is obtained through ion exchange with europium terbium rare earth. The co-doped luminescent porous material can efficiently transfer energy from terbium to europium, so that the material has changes of ratio fluorescence to a bacillus anthraci biomarker, and reduces possible measuring errors caused by changes of single fluorescence intensity. Moreover, the co-doped luminescent porous material can further concentrate molecules of the bacillus anthraci biomarker in the environment, and improve the detection limit of the bacillus anthraci biomarker.

Description

technical field [0001] The present invention relates to the technical field of rare earth luminescent materials, and relates to a europium and terbium co-doped luminescent material and its preparation method and application, in particular to a europium and terbium co-doped luminescent porous material and its preparation method, which is used for the ratio fluorescence of Bacillus anthracis biomarkers. detection application. Background technique [0002] Fluorescence ratio technique (ratio-type fluorescence detection technique) is an important technique in fluorescence analysis. In biological stains, dyes that can be excited by ultraviolet or blue-violet light (short-wavelength light) to emit fluorescence are called fluorescent dyes (fluorescent pigments); they can be excited by long-wavelength light, and these fluorescent pigments are often called fluorescent probes. Needle. Fluorescent probes are commonly used for staining of fixed tissues and cells, as well as applicatio...

Claims

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Application Information

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IPC IPC(8): C09K11/06G01N21/64
CPCC09K11/06C09K2211/1044C09K2211/188G01N21/6428
Inventor 马和平李斌张翼鹤
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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