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A kind of water-sensitive up-conversion fluorescent material and its preparation method and detection method

A technology of fluorescent materials and detection methods, applied in the direction of luminescent materials, nanotechnology for materials and surface science, fluorescence/phosphorescence, etc., can solve the problems of undiscovered patent publications, complex sample pretreatment, complex instrument operation, etc. Achieve the effect of simple detection, simple synthesis method and high luminous intensity

Active Publication Date: 2022-02-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these instrument detection methods have the following disadvantages: (1) The instruments used are complicated to operate and expensive, and are not suitable for promotion; (2) Complicated sample pretreatment; (3) Professional technicians
[0005] Through the search, no patent publications related to the application of the present invention have been found

Method used

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  • A kind of water-sensitive up-conversion fluorescent material and its preparation method and detection method
  • A kind of water-sensitive up-conversion fluorescent material and its preparation method and detection method
  • A kind of water-sensitive up-conversion fluorescent material and its preparation method and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of water-soluble polyethylenimine surface-functionalized upconversion nanoluminescent material PEI-NaBiF by solvothermal method 4 :Yb 3+ / Er 3+ , the reagents used to synthesize this material are bismuth nitrate, erbium nitrate, ytterbium nitrate, sodium nitrate, ammonium fluoride and polyethyleneimine. Among them, the masses of bismuth nitrate, erbium nitrate, ytterbium nitrate, sodium nitrate, ammonium fluoride and polyethyleneimine are 0.3824 g, 0.008923 g, 0.09183 g, 0.1590 g, 0.3060 g and 0.1450 g, respectively. They were dissolved in 25 mL of ethylene glycol, and reacted in a hydrothermal kettle at 200°C for 8 hours. After the reaction, the reaction solution was centrifuged, washed, and dried to obtain the above-mentioned up-conversion fluorescent material.

[0033] A certain amount of the above-mentioned up-conversion fluorescent material was added to ethanol solutions with different water contents, and the concentration of the up-conversion fluoresce...

Embodiment 2

[0039] Synthesis of water-soluble polyethylenimine surface-functionalized rare-earth up-conversion nanoluminescent material PEI-NaBiF by solvothermal method 4 :Yb 3+ / Er 3+ , the reagents used to synthesize this material are bismuth nitrate, erbium nitrate, ytterbium nitrate, sodium nitrate, ammonium fluoride and polyethyleneimine. Among them, the masses of bismuth nitrate, erbium nitrate, ytterbium nitrate, sodium nitrate, ammonium fluoride and polyethyleneimine are 0.3695 g, 0.008996 g, 0.08854 g, 0.1716 g, 0.2750 g and 0.1180 g, respectively. They were dissolved in 20 mL of ethylene glycol, and reacted in a hydrothermal kettle at 210°C for 10 hours. After the reaction, the reaction liquid was centrifuged, washed, and dried to obtain the above-mentioned up-converting fluorescent material.

[0040] Add a certain amount of the above-mentioned up-conversion fluorescent material to N,N-dimethylformamide solutions with different water contents, and the concentration of the up-c...

Embodiment 3

[0046] Synthesis of water-soluble polyethylenimine surface-functionalized rare-earth up-conversion nanoluminescent material PEI-NaBiF by solvothermal method 4 :Yb 3+ / Er 3+ , the reagents used to synthesize this material are bismuth nitrate, erbium nitrate, ytterbium nitrate, sodium nitrate, ammonium fluoride and polyethyleneimine, among them, bismuth nitrate, erbium nitrate, ytterbium nitrate, sodium nitrate, ammonium fluoride and polyethyleneimine The masses of the amines are 0.3715 g, 0.008972 g, 0.08884 g, 0.1685 g, 0.3590 g and 0.1600 g, respectively. They were dissolved in 20 mL of ethylene glycol, and reacted in a hydrothermal kettle at 205°C for 9 hours. After the reaction, the reaction solution was centrifuged, washed, and dried to obtain the above-mentioned up-conversion fluorescent material.

[0047] A certain amount of the above-mentioned up-conversion fluorescent material was added to methanol solutions with different water contents, and the concentration of the...

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Abstract

The invention discloses a water-sensitive up-conversion fluorescent material, a preparation method and a detection method thereof. The water-sensitive up-conversion fluorescent material is a rare-earth up-conversion fluorescent material PEI-NaBiF functionalized on the surface of water-soluble polyethyleneimine 4 :Yb 3+ / Er 3+ , which is prepared by solvothermal method, the process is as follows: bismuth nitrate, erbium nitrate, ytterbium nitrate, sodium nitrate, ammonium fluoride and polyethyleneimine are dissolved in ethylene glycol, and then heated in a hydrothermal kettle at 180‑210 ° C React for 6-24 hours. After the reaction, the reaction solution is centrifuged, washed, and dried to obtain the water-sensitive up-conversion fluorescent material. The inventive method has established a novel method for measuring water content in an organic solvent, and adopts a surface-functionalized up-conversion fluorescent material (PEI-NaBiF 4 :Yb 3+ / Er 3+ ) is a fluorescent probe, which is determined by using different water contents to achieve different degrees of upconversion fluorescence extinguishment. This method has the characteristics of wide measurement range, small background interference, and simple detection.

Description

technical field [0001] The invention belongs to the technical field of measuring water content in organic solvents, and in particular relates to a water-sensitive up-conversion fluorescent material, a preparation method and a detection method thereof. Background technique [0002] As one of the most important material resources, water is of great significance to life. With the development of science and technology, trace amounts of water are usually considered as impurities in dry products, food inspection, environmental testing and some chemical products. Therefore, methods that can quickly and effectively detect water content in organic solvents have attracted widespread attention. [0003] At present, many methods can be used to detect water content, such as: Karl Fischer method, coulometric method, dew point method, etc. However, these instrumental detection methods have the following disadvantages: (1) The instruments used are complicated to operate and expensive, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/85C09K11/02B82Y20/00B82Y30/00B82Y40/00G01N21/64
Inventor 潘再法汪涛闻莹婷邵康
Owner ZHEJIANG UNIV OF TECH
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