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Preparation method of europium/cerium-codoped complex fluorescent sensing material and application of fluorescent sensing material in detecting organic small-molecule compounds

A technology for small molecule compounds and fluorescence sensing, applied in the field of preparation of fluorescent sensing materials, can solve the problem of low accuracy in detecting organic small molecule compounds, achieve efficient identification and rapid detection, efficient broadband absorption and emission, and improve sensitivity Effect

Active Publication Date: 2016-09-21
黑龙江省工研院资产经营管理有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the accuracy of the existing detection of small organic molecules is not high, and to provide a preparation method of a europium-cerium co-doped complex fluorescent sensing material and its application to detect small organic molecules

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  • Preparation method of europium/cerium-codoped complex fluorescent sensing material and application of fluorescent sensing material in detecting organic small-molecule compounds
  • Preparation method of europium/cerium-codoped complex fluorescent sensing material and application of fluorescent sensing material in detecting organic small-molecule compounds
  • Preparation method of europium/cerium-codoped complex fluorescent sensing material and application of fluorescent sensing material in detecting organic small-molecule compounds

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specific Embodiment approach 1

[0028] Specific embodiment one: In this embodiment, the preparation method of the europium-cerium co-doped complex fluorescent sensing material is implemented according to the following steps:

[0029] 1. Add water-soluble salts of europium, water-soluble salts of cerium and aromatic carboxylic acid ligands into the solvent, and disperse evenly through ultrasonic to obtain a mixed solution of ligands and rare earth ions;

[0030] 2. Put the mixture of ligand and rare earth ions obtained in step 1 in a reaction kettle lined with polytetrafluoroethylene, and conduct a hydrothermal reaction at a temperature of 60°C to 100°C, collect the reaction product, and filter it Using organic solvents for solvent replacement, and finally vacuum drying to obtain europium-cerium co-doped complex fluorescent sensing materials;

[0031] Wherein the molar ratio of europium to cerium in step 1 is 10:1-1:10, and the aromatic carboxylic acid ligand is trimesic acid, terephthalic acid or 2,5-dihydro...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment differs from Embodiment 1 in that the solvent described in step 1 is a mixed solvent of water and an organic reagent, wherein the organic reagent is one or more mixtures of ethanol, DMF, and methanol. Other steps and parameters are the same as those in Embodiment 1.

[0034] In this embodiment, the use of a mixed solvent of water and an organic reagent can reduce the synthesis temperature and improve the purity and yield of the product compared with a single solvent.

specific Embodiment approach 3

[0035] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the water-soluble salt of europium described in step one is Eu(NO 3 ) 3 ·6H 2 O, EuCl 6 ·6H 2 O or europium acetate; the water-soluble salt of cerium is Ce(NO 3 ) 3 ·6H 2 O, CeCl 6 ·6H 2 O or cerium acetate. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a preparation method of a europium / cerium-codoped complex fluorescent sensing material and application of the fluorescent sensing material in detecting organic small-molecule compounds, belonging to the field of material science and solving the problem of low detection accuracy for organic small-molecule compounds at present. The preparation method of the fluorescent sensing material comprises the following steps: 1. adding a europium salt, a cerium salt and an aromatic carboxylic acid ligand into a solvent to obtain a mixed solution; and 2. carrying out hydrothermal reaction on the mixed solution, and drying to obtain the europium / cerium-codoped complex. The detection method comprises the following steps: 1. adding the europium / cerium-codoped complex into an organic small-molecule water solution to prepare a plurality of suspension samples with concentration gradient; 2. by using the maximum fluorescence intensity of the suspension samples as vertical coordinates and the corresponding volume concentration as horizontal coordinates, obtaining a standard linear equation; and 3. adding the europium / cerium-codoped complex into the water solution to be detected, testing the corresponding fluorescence intensity, and estimating the concentration of organic small molecules. The fluorescent sensing material can be utilized to implement efficient identification and quick detection on organic small-molecule compounds, and has high accuracy.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a preparation method and application of a fluorescent sensing material capable of detecting small organic molecular compounds. Background technique [0002] In recent years, the research on fluorescent sensing materials and devices, as an important content of materials science, has received great attention. Fluorescent sensing materials refer to molecules that can selectively bind to an analyte and cause changes in the fluorescence spectrum of the system, mainly sensitive to changes in luminescence intensity. Due to the advantages of high sensitivity, convenient detection, and real-time detection, fluorescent sensors have developed rapidly in molecular recognition and sensor applications. [0003] For example, alcoholic beverages containing toxic methanol are a major disaster in developing countries, where consumption can cause blindness and even death. The dangerous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00C09K11/06G01N21/64
CPCC07F5/003C09K11/06C09K2211/182G01N21/64
Inventor 宋英南希刘福徐洪波孙秋
Owner 黑龙江省工研院资产经营管理有限公司