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A fluorescent sensor for detecting fluoride ions and its preparation method

A fluorescent sensor and fluorine ion technology, applied in the field of analytical chemistry, can solve the problems of limited application, achieve high quantum yield, good photostability and biocompatibility, good biocompatibility and sensitivity

Active Publication Date: 2017-11-03
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, quantum dots are toxic even at very low concentrations
In addition, quantum dots are usually soluble in organic solvents, which greatly limits their application in the field of analytical detection

Method used

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  • A fluorescent sensor for detecting fluoride ions and its preparation method
  • A fluorescent sensor for detecting fluoride ions and its preparation method
  • A fluorescent sensor for detecting fluoride ions and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for preparing a fluorescent sensor for detecting fluoride ions proposed in an embodiment of the present invention includes the following steps:

[0055] S1. Dissolve 0.08 parts by weight of 3-aminophenylboronic acid in 22 parts by weight of water, adjust the pH value of the system to 8, and then perform a hydrothermal reaction, wherein the temperature of the hydrothermal reaction is 180 ° C, and the time of the hydrothermal reaction For 8h, after the reaction is finished, carbon dots are obtained through cooling, centrifugation, and dialysis;

[0056] S2, 130 parts by volume of HAuCl with a mass fraction of 0.012% 4 The solution is heated to boiling, then 5 parts by volume of a sodium citrate solution with a mass fraction of 1.2% is added, stirred and refluxed until the system turns red, then cooled, centrifuged, and washed to obtain gold nanoparticles;

[0057] S3, after mixing 1 volume part of 3-mercapto-1,2-propanediol and 3500 volume parts of nano gold, re...

Embodiment 2

[0060] A method for preparing a fluorescent sensor for detecting fluoride ions proposed in an embodiment of the present invention includes the following steps:

[0061] S1. Dissolve 0.12 parts by weight of 3-aminophenylboronic acid in 15 parts by weight of water, adjust the pH value of the system to 10, and then perform a hydrothermal reaction, wherein the temperature of the hydrothermal reaction is 145 ° C, and the time of the hydrothermal reaction For 10h, after the reaction is completed, carbon dots are obtained through cooling, centrifugation, and dialysis;

[0062] S2, 180 parts by volume of HAuCl with a mass fraction of 0.008% 4 The solution is heated to boiling, then 6 parts by volume of 0.8% sodium citrate solution is added, stirred and refluxed until the system turns red, then cooled, centrifuged, and washed to obtain gold nanoparticles;

[0063] S3, after mixing 1 volume part of 3-mercapto-1,2-propanediol and 4500 volume parts of nano gold, reacting for 7h to obtain...

Embodiment 3

[0066] A kind of preparation method that the present invention proposes is used to detect the fluorescent sensor of fluorine ion, comprises the following steps:

[0067] S1. Dissolve 0.11g of 3-aminophenylboronic acid in 21g of water, adjust the pH of the system to 9 with 0.5mol / L sodium hydroxide solution, and then carry out a hydrothermal reaction, wherein the temperature of the hydrothermal reaction is 150°C. The time of hydrothermal reaction is 9.5h. After the reaction is finished, cool down, centrifuge, and then dialyze with a dialysis bag with a molecular weight of 800 for 28h to obtain carbon dots;

[0068] S2, 150ml mass fraction is 0.009% HAuCl 4 Heat the solution to boiling, then add 5.8ml of sodium citrate solution with a mass fraction of 0.9%, stir and reflux until the system turns red, then cool, centrifuge, and wash to obtain gold nanoparticles;

[0069] S3. Mix 3uL of 3-mercapto-1,2-propanediol and 12.6ml of gold nanoparticles and react for 8h to obtain modifie...

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Abstract

The invention discloses a fluorescent sensor for detecting fluorine ions and a preparation method thereof. The preparation method comprises: dissolving 3-aminophenylboronic acid in water and adjusting the pH value of the system to be alkaline, and then carrying out hydrothermal reaction to obtain carbon point; add sodium citrate solution into the boiling HAuCl4 solution, stir and reflux until the system turns red, then cool, centrifuge, and wash to obtain nano-gold; mix 3-mercapto-1,2-propanediol and nano-gold to react to obtain modifying nano-gold; mixing carbon dots with modified nano-gold and reacting to obtain the fluorescent sensor for detecting fluorine ions. The preparation method of the fluorescent sensor for detecting fluorine ions described in the present invention has a simple and easy process, is green and environmentally friendly, and can be extended to the preparation of other luminescent nanomaterials, and the obtained fluorescent sensor for detecting fluorine ions can be used to detect aqueous solutions The fluoride ion has low toxicity, high quantum yield, good photostability, biocompatibility and sensitivity.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to a fluorescent sensor for detecting fluorine ions and a preparation method thereof. Background technique [0002] Fluorine is one of the essential trace elements for the human body and is an essential substance for maintaining the growth of bones and teeth. There is not much difference between the amount of fluoride ions that meet the needs of the human body and the amount of fluorosis caused by excessive fluoride, so it is very important to strictly control the intake of fluorine, otherwise it is easy to cause fluorosis. At present, the most commonly used detection methods for fluoride ions are spectrophotometry and fluoride ion selective electrode method. In spectrophotometry, the presence of interference factors such as the non-monochromaticity of the light source of the photometer and the scattering of light by the solution will cause the measurement results to d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 石建军陈卓王伟刘国良
Owner ANHUI UNIV OF SCI & TECH
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